WO2013136901A1 - Communication device and communication system - Google Patents

Communication device and communication system Download PDF

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Publication number
WO2013136901A1
WO2013136901A1 PCT/JP2013/053507 JP2013053507W WO2013136901A1 WO 2013136901 A1 WO2013136901 A1 WO 2013136901A1 JP 2013053507 W JP2013053507 W JP 2013053507W WO 2013136901 A1 WO2013136901 A1 WO 2013136901A1
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WO
WIPO (PCT)
Prior art keywords
communication
pair
lines
power supply
circuit
Prior art date
Application number
PCT/JP2013/053507
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French (fr)
Japanese (ja)
Inventor
和彦 二井
剛志 萩原
遼 岡田
Original Assignee
住友電気工業株式会社
住友電装株式会社
株式会社オートネットワーク技術研究所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 住友電気工業株式会社, 住友電装株式会社, 株式会社オートネットワーク技術研究所 filed Critical 住友電気工業株式会社
Publication of WO2013136901A1 publication Critical patent/WO2013136901A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Definitions

  • the present application relates to a communication device that communicates via a pair of communication lines that are respectively connected to a pair of power supply lines, or a pair of communication lines that are respectively connected to a control line that transmits a control signal used for power supply control and a ground line, and
  • the present invention relates to a communication system including a communication device.
  • the electric vehicle charges the battery by supplying power from an external power supply device.
  • the external power supply device is a power supply device installed in a facility such as a general house or a commercial power supply station. When power is supplied from the power supply device to the vehicle, the plug at the end of the charging cable connected to the power supply device is connected to a power supply port provided in the vehicle as a power receiving connector. Then, power is supplied from the power supply device to the vehicle via the power supply line included in the charging cable, and the battery is charged.
  • the charging cable includes not only the power supply line but also other wiring such as a grounding line and a control line.
  • the control line is a wiring used for transmission of a control signal such as a control pilot signal used for power supply control of the power storage device.
  • standardization of communication such as power line communication for performing communication between the vehicle and the power supply device is being promoted by superimposing communication signals using the power supply line as a medium.
  • standardization is progressing not only for power line communication but also for communication such as inband communication in which a communication signal is superimposed on a control signal using a control line as a medium and transmitted and received between the vehicle and the power feeding device. (See, for example, Non-Patent Document 1).
  • a superposed separator using a transformer having a first coil and a second coil is connected to wiring such as a power supply line, a ground line, and a control line.
  • the superposition separator can communicate between the vehicle and the power feeding device by superimposing and separating the communication signal input / output from the communication device connected by the communication line on the wiring. .
  • the vehicle and the power supply device include a communication device that is connected to a pair of power supply lines or a ground line and a control line via a pair of communication lines in order to perform power line communication or inband communication.
  • a communication device is required to be resistant to common mode noise that enters through a pair of communication lines that are differential signal lines.
  • a method of interposing a common mode choke coil for attenuating common mode noise in a communication line is implemented.
  • Resistance to common mode noise can be evaluated by evaluation tests such as BCI (Bulk Current Injection), DPI (Direct Power Injection), and an induction noise test.
  • FIG. 12 is an explanatory diagram illustrating an example of an evaluation test for common mode noise of a communication device.
  • FIG. 12 shows a system that performs a BCI test as an evaluation test for the communication apparatus 1000 that performs inband communication.
  • the BCI test is an evaluation test for evaluating whether or not a malfunction occurs due to an abnormality such as communication interruption when noise is applied.
  • a system that performs a BCI test is used, and the influence of common mode noise is evaluated by measuring a voltage value in the communication apparatus 1000.
  • the communication apparatus 1000 is connected to a ground line (GND) and a control line (CPLT) via a superposition separator 1100.
  • GND ground line
  • CPLT control line
  • Superposition separator 1100 and communication apparatus 1000 are connected by a pair of communication lines such as an OFDM (Orthogonal Frequency Division Multiplexing) line.
  • OFDM Orthogonal Frequency Division Multiplexing
  • a common mode choke coil 1001 is interposed between the pair of communication lines.
  • the pair of communication lines are branched into a pair of branch lines connected to the transmission side circuit and a pair of branch lines connected to the reception side circuit.
  • a transmission protection circuit (Tx protection circuit) 1002 is connected as a circuit on the transmission side, and the transmission protection circuit 1002 is connected to an AFE (Analog Front End) circuit 1003 through a pair of connection lines.
  • a reception protection circuit (Rx protection circuit) 1005 is connected via a band pass filter (RxBPF) 1004.
  • the reception protection circuit 1005 is connected to the AFE circuit 1003 by a pair of connection lines. It is connected.
  • a pair of communication lines are inserted into the current probe 2000, and the common probe noise is artificially generated by the current probe 2000.
  • the generated common mode noise enters the AFE circuit 1003 as indicated by an arrow indicated by a broken line in FIG.
  • voltage values (RxIN +, RxIN ⁇ ) applied to a pair of connection lines connecting the reception protection circuit 1005 and the AFE circuit 1003 are measured. Since the voltage value obtained by the measurement is affected by the entered common mode noise, it can be used for evaluating the influence of the common mode noise.
  • FIG. 13 is a graph showing an example of the result of the common mode noise evaluation test.
  • FIG. 13 shows the result of the evaluation test carried out by the method shown in FIG. 12 as the change with time of the voltage values (RxIN +, RxIN ⁇ ) applied to the pair of connection lines.
  • the voltage value having an in-phase waveform simulates common mode noise entering the AFE circuit 1003 and its influence.
  • FIG. 13 shows a test result when common mode noise is attenuated by the common mode choke coil 1001 shown in FIG. 12, but the portion surrounded by a broken line in the figure has a flat waveform regardless of the peak position. It has become. This is due to the action of a clipping diode incorporated in the reception protection circuit 1005.
  • the clipping diode has a function of suppressing amplitude with respect to a signal exceeding a preset clamp level range.
  • FIG. 13 shows the amplitude of common mode noise that has entered as a test, but if similar common mode noise enters during mounting, the communication signal is also suppressed along with the common mode noise. When suppression is performed on the communication signal, the communication signal is partially lost, and communication abnormality such as communication interruption occurs.
  • the present invention has been made in view of such circumstances, and by providing a connection portion that electromagnetically couples a pair of communication lines and an internal circuit with a first coil and a second coil, common mode noise is provided.
  • An object of the present invention is to provide a communication device and a communication system capable of attenuating noise.
  • a communication apparatus is a communication apparatus that communicates via a pair of communication lines that are respectively connected to a pair of power supply lines used for power supply, and a communication circuit that performs processing related to communication via the pair of communication lines; A connection portion connecting the pair of communication lines and the communication circuit, the connection portion being electromagnetically coupled to the first coil and the first coil having both ends connected to the pair of communication lines. And the both ends of the second coil are connected to the communication circuit.
  • a communication apparatus is a communication apparatus that communicates via a pair of communication lines that are connected to a control line that transmits a control signal used for power supply control and a ground line, respectively, and performs communication via the pair of communication lines.
  • a communication circuit that performs the processing, and a connection part that connects the pair of communication lines and the communication circuit, the connection part including a first coil that is connected to the pair of communication lines at both ends; A second coil electromagnetically coupled to the first coil, and both ends of the second coil are connected to the communication circuit.
  • the communication circuit includes a transmission side circuit and a reception side circuit that are connected to the pair of communication lines, respectively, and the connection unit connects the pair of communication lines and the reception side circuit. It is characterized by.
  • a communication system includes a power feeding device and a vehicle having a power storage device fed from the power feeding device and having a communication function, connected by a pair of power feeding lines used for power feeding.
  • the communication system for transmitting and receiving communication signals at least one of the power supply device and the vehicle includes the communication device, and the communication device is connected to the pair of power supply lines by a pair of communication lines.
  • a communication system includes a power supply device and a power storage device powered by the power supply device, and a vehicle having a communication function, a power supply line used for power supply, and a control signal used for power supply control for the power storage device.
  • a communication device is provided, and the communication device is connected to the control line and the ground line by a pair of communication lines.
  • common mode noise entering from a pair of communication lines can be canceled by the first coil.
  • common mode noise entering from a pair of communication lines is canceled by the first coil connected to both ends of the pair of communication lines, and signals related to communication are electromagnetic By transmitting by induction, it is possible to improve the resistance to common mode noise and the like, and thus excellent effects can be obtained.
  • FIG. 1 is an explanatory diagram showing a configuration example of a communication system according to Embodiment 1 of the present invention.
  • FIG. 1 shows an example in which the present invention is applied to a form in which a battery (power storage device) 10 provided in a vehicle 1 such as an electric vehicle or a plug-in hybrid vehicle is fed from a power feeding device 2 such as a charging stand.
  • a battery power storage device
  • the vehicle 1 and the power supply device 2 can be connected by a charging cable 3.
  • the charging cable 3 includes a pair of power supply lines 31 and 32 used as power supply lines, a control line 33 that transmits a control signal such as a control pilot signal (CPLT) used for charging control, and a grounding line that is a grounding conductor. 34 is included.
  • One end of the charging cable 3 is connected to the power feeding device 2 side, and the other end side can be connected to a power receiving connector 11 arranged as an in-vehicle power feeding port on the vehicle 1 side. By connecting the other end of the charging cable 3 to the power receiving connector 11, the circuit configuration illustrated in FIG. 1 is obtained.
  • the feeder lines 31 and 32 are AC lines to which an AC voltage is applied.
  • the control line 33 is a signal line for transmitting / receiving a control signal such as a control pilot signal, and charging control is performed based on a control pilot signal transmitted / received when the power feeding apparatus 2 and the charging control apparatus 13 are connected.
  • the power supply lines 31 and 32 can also be used as a medium for transmitting information for performing management such as vehicle authentication, charging management, billing management, and other various information. That is, the vehicle 1 can communicate with the power feeding device 2 by superimposing and separating the communication signals on the power feeding lines 31 and 32.
  • the power supply device 2 is input from the power supply unit 20 that supplies AC power, the charging control unit 21 that performs communication related to charging control, the communication unit (communication device) 22 that performs input and output of communication signals, And a superposition / separation unit 23 that superimposes and separates the output communication signal on the power supply lines 31 and 32.
  • power supply lines 31 and 32 is connected to the power supply unit 20.
  • One end of a control line 33 is connected to the charging control unit 21.
  • the wiring in the power feeding apparatus 2 is an internal conductor that functions as an extension line connected to the power feeding lines 31 and 32, the control line 33, and the ground line 34 included in the charging cable 3 outside the power feeding apparatus 2.
  • the power supply lines 31 and 32, the control line 33, and the ground line 34 will be described including the extended line portion disposed as the internal conductor.
  • the charge control unit 21 is, for example, an output-side circuit that conforms to an international standard related to charge control, and transmits and receives control signals such as control pilot signals, thereby performing charge control in various states such as connection confirmation and energization start. Do.
  • the communication unit 22 is a communication device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the pair of power supply lines 31 and 32, respectively.
  • a superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.
  • the superposition / separation unit 23 is configured using a circuit such as a coupling transformer (a circuit such as an electromagnetic induction signal converter) and an element such as a capacitor.
  • the coupling transformer is electromagnetically coupled to the first coil 41a and the first coil 41a, both ends of which are connected to the communication lines 24 and 25 on the power supply lines 31 and 32 via capacitors, and communication on the communication unit 22 side.
  • a second coil 41b having both ends connected to the wires 24 and 25.
  • the capacitor has a high impedance with respect to the AC power supplied via the feeder lines 31 and 32, and has a band for low speed communication of several tens to several hundred kHz or a band for high speed communication of several MHz to several tens of MHz.
  • the capacitor transmits a signal in a frequency band used for a communication signal and cuts off a signal in a frequency band used for AC power in a transmission path branched from the feeder lines 31 and 32.
  • the superimposing / separating unit 23 superimposes various communication signals output from the communication unit 22 on the power supply lines 31 and 32 from the communication lines 24 and 25 and also transmits various communication signals separated from the power supply lines 31 and 32 to the communication unit. 22, power line communication using the feeder lines 31 and 32 as a medium is performed. That is, the power feeding device 2 includes the communication unit 22 as a communication device, but it can also be regarded as functioning as a communication device that performs power line communication.
  • the vehicle 1 includes a battery 10 and a power receiving connector 11, a charging device 12 that charges the battery 10, a charging control device 13 that performs communication related to charging control, a communication device 14 that transmits and receives communication signals, And a superimposition separator 15 that superimposes and separates communication signals on the power supply lines 31 and 32.
  • in-vehicle wiring connected to the feeder lines 31 and 32, the control line 33 and the ground line 34 is disposed.
  • the in-vehicle wiring connected to the power supply lines 31 and 32 is an AC line connected to the charging device 12, and the battery 10 is charged by the charging device 12.
  • the in-vehicle wiring connected to the control line 33 is connected to the charging control device 13 via an extension line.
  • the in-vehicle wiring connected to the ground line 34 is body earthed.
  • the charge control device 13 is, for example, an input-side circuit that conforms to an international standard related to charge control, and performs charge control in various states such as connection confirmation and communication start by transmitting and receiving control signals such as control pilot signals. Do.
  • the communication device 14 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively.
  • a superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.
  • the superposition separator 15 is configured using a circuit such as a coupling transformer and an element such as a capacitor.
  • the coupling transformer is electromagnetically coupled to the first coil 46a, both ends of which are connected to the communication lines 16 and 17 on the power supply lines 31 and 32 via capacitors, and communication on the communication device 14 side.
  • a second coil 46b having both ends connected to the wires 16 and 17;
  • the capacitor has a high impedance with respect to the AC power supplied via the feeder lines 31 and 32, and has a band for low speed communication of several tens to several hundred kHz or a band for high speed communication of several MHz to several tens of MHz. It becomes low impedance for the communication signal to be used. That is, the capacitor transmits a signal in a frequency band used for a communication signal and cuts off a signal in a frequency band used for AC power in a transmission path branched from the feeder lines 31 and 32.
  • the superimposing / separating device 15 superimposes various communication signals output from the communication device 14 on the power supply lines 31 and 32 from the communication lines 16 and 17 and also transmits various communication signals separated from the power supply lines 31 and 32 to the communication device. 14, power line communication using the feeder lines 31 and 32 as a medium is performed.
  • a communication signal is transmitted by the superimposition separator 15, the communication lines 16 and 17, the feeder lines 31 and 32, the communication lines 24 and 25, the superposition / separation unit 23, and other wirings, elements, and circuits.
  • a loop circuit is formed.
  • FIG. 2 is a block diagram illustrating a configuration example of the communication device 14 of the vehicle 1 used in the communication system according to Embodiment 1 of the present invention.
  • the communication device 14 is connected to a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively.
  • the communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively.
  • a pair of communication lines 16 and 17 are provided with a superposition separator 15, and the communication lines 16 and 17 connecting the superposition separator 15 and the communication device 14 are used as OFDM (Orthogonal Frequency Division Multiplexing) lines. .
  • OFDM Orthogonal Frequency Division Multiplexing
  • a common mode choke coil 140 is interposed between the pair of communication lines 16 and 17.
  • the common mode choke coil 140 has a function of attenuating common mode noise that enters the inside of the communication device 14 and a function of attenuating common mode noise that advances from the inside of the communication device 14 to the outside. Note that the communication device 14 of the present invention cannot be suppressed even by the common mode choke coil 140 and has a function of further suppressing common mode noise entering the inside.
  • the pair of communication lines 16 and 17 are connected to the communication circuit via the common mode choke coil 140.
  • the communication circuit includes a transmission side circuit and a reception side circuit, and the pair of communication lines 16 and 17 includes a pair of branch lines 16a and 17a connected to the transmission side circuit and a pair connected to the reception side circuit. Branch lines 16b and 17b.
  • a transmission protection circuit (Tx protection circuit) 141 is connected as a circuit on the transmission side, and the transmission protection circuit 141 is connected to an AFE (Analog Front End) circuit 142 through a pair of connection lines.
  • AFE Analog Front End
  • a reception protection circuit (Rx protection circuit) 144 is connected via a bandpass filter (RxBPF) 143, and the reception protection circuit 144 is connected to the AFE circuit 142 by a pair of connection lines. It is connected.
  • connection circuit (connection unit) 145 using a circuit such as a transformer is interposed between the pair of branch lines 16b and 17b connected to the circuit on the reception side.
  • the connection circuit 145 includes a first coil 145a and a second coil 145b that are electromagnetically coupled. Both ends of the first coil 145a are connected to the pair of communication lines 16 and 17 via the pair of branch lines 16b and 17b, and both ends of the second coil 145b are connected to the reception protection circuit 144.
  • a transformer including a first coil 145a and a second coil 145b having substantially the same number of windings is used as the connection circuit 145, and the pair of communication lines 16 and 17 and the reception protection circuit 144 are connected. .
  • a transformer including the first coil 145a and the second coil 145b having substantially the same number of windings is generated by the electromagnetic induction. It is induced on the 145b side.
  • connection circuit 145 has a function of attenuating common mode noise that enters the circuit on the reception side.
  • FIG. 3 is a block diagram illustrating a configuration example of the communication unit 22 of the power feeding device 2 used in the communication system according to Embodiment 1 of the present invention.
  • the communication unit 22 is connected to a pair of communication lines 24 and 25 that are connected to a pair of power supply lines 31 and 32, respectively.
  • the communication unit 22 included in the power supply apparatus 2 is an apparatus that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the pair of power supply lines 31 and 32, respectively.
  • a superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.
  • the pair of communication lines 24 and 25 are connected via a common mode choke coil 220 to a pair of branch lines 24 a and 25 a connected to a transmission side circuit and a pair of connection lines connected to a reception side circuit. Branches to branch lines 24b and 25b, respectively.
  • a transmission protection circuit (Tx protection circuit) 221 is connected as a circuit on the transmission side, and the transmission protection circuit 221 is connected to the AFE circuit 222 by a pair of connection lines.
  • a reception protection circuit (Rx protection circuit) 224 is connected via a bandpass filter (RxBPF) 223, and the reception protection circuit 224 is connected to the AFE circuit 222 by a pair of connection lines. It is connected.
  • connection circuit (connection unit) 225 using a circuit such as a transformer is interposed between the pair of branch lines 24b and 25b connected to the circuit on the reception side.
  • the connection circuit 225 includes a first coil 225a and a second coil 225b that are electromagnetically coupled. Both ends of the first coil 225a are connected to the pair of communication lines 24, 25 via a pair of branch lines 24b, 25b, and both ends of the second coil 225b are connected to the reception protection circuit 224.
  • the configuration of the communication unit 22 is substantially the same as the configuration of the communication device 14 described with reference to FIG.
  • FIG. Embodiment 2 is a form applied to the communication system which concerns on inband communication in Embodiment 1.
  • FIG. 1 the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the first embodiment is referred to and detailed description thereof is omitted.
  • FIG. 4 is an explanatory diagram showing a configuration example of a communication system according to Embodiment 2 of the present invention.
  • the communication unit 22 included in the power feeding device 2 is a communication device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the control line 33 and the ground line 34, respectively. is there.
  • a superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.
  • the superposition / separation unit 23 superimposes various communication signals output from the communication unit 22 on the control line 33 and the ground line 34 from the communication lines 24 and 25, and separates the communication signal from the control line 33 and the ground line 34.
  • the power supply apparatus 2 includes the communication unit 22 as a communication apparatus, but also functions as a communication apparatus that performs power line communication.
  • the communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a control line 33 and a ground line 34, respectively.
  • a superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.
  • the superimposing separator 15 superimposes various communication signals output from the communication device 14 on the control line 33 and the ground line 34 from the communication lines 16 and 17, and separates them from the control line 33 and the ground line 34. By inputting various communication signals to the communication device 14, inband communication using the control line 33 and the ground line 34 as a medium is performed.
  • a communication signal is transmitted by the superimposition separator 15, the communication lines 16 and 17, the control line 33, the ground line 34, the communication lines 24 and 25, the superposition separation unit 23, and other wirings, elements, and circuits.
  • a loop circuit is formed.
  • FIG. 5 is a block diagram showing a configuration example of the communication device 14 of the vehicle 1 used in the communication system according to Embodiment 2 of the present invention.
  • the communication device 14 is connected to a pair of communication lines 16 and 17 that are connected to a control line 33 and a ground line 34, respectively.
  • the communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a control line 33 and a ground line 34, respectively.
  • a superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.
  • the internal configuration of the communication device 14 used in the communication system according to the second embodiment is the same as that of the communication device 14 according to the first embodiment. The detailed explanation is omitted.
  • FIG. 6 is a block diagram illustrating a configuration example of the communication unit 22 of the power feeding device 2 used in the communication system according to Embodiment 2 of the present invention.
  • the communication unit 22 is connected to a pair of communication lines 24 and 25 that are connected to a control line 33 and a ground line 34, respectively.
  • the communication unit 22 included in the power supply device 2 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to a control line 33 and a ground line 34, respectively.
  • a superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.
  • the internal configuration of the communication unit 22 used in the communication system according to the second embodiment is the same as that of the communication unit 22 according to the first embodiment. Is omitted.
  • FIG. 7 is an explanatory diagram showing an example of an evaluation test for common mode noise of a device used in the communication system of the present invention.
  • FIG. 7 shows a system that performs an evaluation test on the communication device 14 included in the vehicle 1 that performs the inband communication described with reference to FIG. 5 in the second embodiment.
  • the evaluation test shown in FIG. 7 evaluates the influence of common mode noise by measuring the voltage value in the communication device 14 using a system that performs the BCI test.
  • a pair of communication lines 16 and 17 are inserted into the current probe 4 and pseudo common mode noise is generated from the current probe 4.
  • the generated common mode noise enters the communication device 14 from the current probe 4 side as indicated by an arrow indicated by a broken line in FIG.
  • the common mode noise is canceled by the connection circuit 145, thereby suppressing entry into the reception protection circuit 144.
  • the voltage values (RxIN +, RxIN ⁇ ) applied to the pair of connection lines connecting the reception protection circuit 144 and the AFE circuit 142 are measured, thereby giving the entered common mode noise. Assess the impact.
  • FIG. 8 is a graph showing an example of the result of the common mode noise evaluation test of the device used in the communication system of the present invention.
  • FIG. 8 shows the result of the evaluation test carried out by the method shown in FIG. 7 as a change with time in the voltage values (RxIN +, RxIN ⁇ ) applied to the pair of connection lines.
  • the voltage value having an in-phase waveform simulates common mode noise entering the AFE circuit 142 and its influence.
  • the voltage values (RxIN +, RxIN ⁇ ) applied to the pair of connection lines have almost flat waveforms. This indicates that the pseudo common mode noise generated in the current probe 4 is sufficiently attenuated by flowing out from the pair of inductive elements 145 and 146 and does not enter the AFE circuit 142.
  • the communication device 14 and the like used in the communication system of the present invention have a remarkable effect on the attenuation of the common mode noise. It is clear that
  • the clipping diode incorporated in the reception protection circuit 144 does not suppress the amplitude. Therefore, it is possible to prevent the communication signal from being suppressed. Therefore, it is possible to prevent occurrence of communication abnormality such as communication interruption due to partial loss of communication signals.
  • a pair of inductive elements that have low impedance against common mode noise is not connected to a pair of branch lines connected to the reception side circuit, but to a pair of communication lines before branching on the transmission side and reception side You may make it do.
  • FIG. 10 and FIG. 11 are block diagrams showing a configuration example of a communication apparatus used in a communication system according to another embodiment of the present invention.
  • FIG. 10 and FIG. 11 show an example in which the communication device 14 of the vehicle 1 performing inband communication shown as the second embodiment is developed in another form.
  • FIG. 10 and FIG. 11 show the first coil 145a that is electromagnetically coupled in the communication device 14 shown in FIG. 5 until it branches from the superposition separator 15 to the transmission side and the reception side.
  • a connection circuit 145 such as a transformer having the second coil 145b. Both ends of the first coil 145a are connected to the pair of communication lines 16 and 17, and both ends of the second coil 145b are connected to the communication circuit side.
  • FIG. 9 shows a mode in which a connection circuit 145 is interposed between the superposition separator 15 and the common mode choke coil 140.
  • FIG. 10 shows a mode in which a connection circuit 145 is interposed between the common mode choke coil 140 and a branch point that branches to the transmission side and the reception side.
  • FIG. 11 shows a form in which the common mode choke coil 140 is omitted. As shown in FIG. 11, even if the common mode choke coil 140 is not provided, the common mode noise is attenuated by the connection circuit 145, so that it is possible to prevent the occurrence of communication abnormality.
  • 9, 10, and 11 may be applied to power line communication, or may be applied to the communication unit 22 of the power feeding device 2.

Abstract

In this communication device (14) that communicates with wiring, such as a pair of electricity supply wires (31, 32) used for electricity supply, via a pair of respectively connected communication wires (16, 17), the communication wire (16, 17) pair side and a reception protection circuit (144) side are connected by means of a connection circuit (145). The connection circuit (145) is provided with a first coil (145a) and a second coil (145b) that are electromagnetically coupled, both ends of the first coil (145a) are connected to the communication wire (16, 17) pair side, and both ends of the second coil (145b) are connected to the reception protection circuit (144) side.

Description

通信装置及び通信システムCommunication apparatus and communication system

　本願は、一対の給電線に夫々接続する一対の通信線、又は給電制御に用いる制御信号を伝送する制御用線及び接地線に夫々接続する一対の通信線を介して通信する通信装置、及び該通信装置を備える通信システムに関する。
The present application relates to a communication device that communicates via a pair of communication lines that are respectively connected to a pair of power supply lines, or a pair of communication lines that are respectively connected to a control line that transmits a control signal used for power supply control and a ground line, and The present invention relates to a communication system including a communication device.

　近年、モータ及びバッテリ等の装置を搭載し、バッテリに蓄積した電力にてモータを駆動することで走行する電気自動車及びハイブリッド自動車が普及し始めている。電気自動車は外部の給電装置からの給電によりバッテリに対する充電を行う。また、ハイブリッド自動車であっても、外部の給電装置からバッテリへの充電を可能としたプラグインハイブリッド自動車が実用化されている。なお、外部の給電装置とは、一般家屋、商用の給電ステーション等の施設に設置された給電装置である。給電装置から車両への給電に際しては、給電装置に接続されている充電ケーブルの先端のプラグを、受電コネクタとして車両に配設された給電口に接続する。そして、充電ケーブルに内包された給電線を介して給電装置から車両への給電が行われ、バッテリが充電される。　
2. Description of the Related Art In recent years, electric vehicles and hybrid vehicles that are equipped with devices such as a motor and a battery and run by driving the motor with electric power stored in the battery have begun to spread. The electric vehicle charges the battery by supplying power from an external power supply device. Moreover, even if it is a hybrid vehicle, a plug-in hybrid vehicle that can charge a battery from an external power supply device has been put into practical use. The external power supply device is a power supply device installed in a facility such as a general house or a commercial power supply station. When power is supplied from the power supply device to the vehicle, the plug at the end of the charging cable connected to the power supply device is connected to a power supply port provided in the vehicle as a power receiving connector. Then, power is supplied from the power supply device to the vehicle via the power supply line included in the charging cable, and the battery is charged.

　なお、充電ケーブルには、給電線だけでなく、接地線、制御用線等の他の配線も内包されている。制御用線とは、蓄電装置の給電制御に用いるコントロールパイロット信号等の制御信号の伝送に用いられる配線である。制御用線を介して、制御信号を給電装置及び車両間で送受信することにより、充電ケーブルの接続状態、充電可否の状態、充電の状態等の様々な状態を検知し、検知した状態に応じた充電制御が行われる。　
The charging cable includes not only the power supply line but also other wiring such as a grounding line and a control line. The control line is a wiring used for transmission of a control signal such as a control pilot signal used for power supply control of the power storage device. By transmitting and receiving a control signal between the power feeding device and the vehicle via the control line, various states such as the connection state of the charging cable, the state of chargeability, the state of charge, etc. are detected, and according to the detected state Charging control is performed.

　さらに、電気自動車、ハイブリッド自動車等の外部からの給電を要する自動車の実用化に際しては、充電制御のための情報、及び、充電量又は課金の管理等を行うための通信情報を、車両及び給電装置の間で送受信する通信機能が求められる。　
Furthermore, when commercializing an automobile that requires power supply from the outside, such as an electric vehicle or a hybrid vehicle, information for charging control and communication information for managing charge amount or charging, etc. A communication function for transmitting and receiving data is required.

　そこで、給電線を媒体として通信信号を重畳することにより、車両及び給電装置の間で通信を行う電力線通信等の通信の規格化が進められている。また、通信信号の送受信方法としては電力線通信だけでなく、制御用線を媒体として制御信号に通信信号を重畳して、車両及び給電装置間で送受信するinband通信等の通信についても規格化が進められている（例えば、非特許文献１参照。）。　
Therefore, standardization of communication such as power line communication for performing communication between the vehicle and the power supply device is being promoted by superimposing communication signals using the power supply line as a medium. As a method for transmitting and receiving communication signals, standardization is progressing not only for power line communication but also for communication such as inband communication in which a communication signal is superimposed on a control signal using a control line as a medium and transmitted and received between the vehicle and the power feeding device. (See, for example, Non-Patent Document 1).

　電力線通信、inband通信等の通信においては、給電線、接地線、制御用線等の配線に対して第１コイル及び第２コイルを備えるトランスを用いた重畳分離器が接続されている。重畳分離器は、通信線にて接続されている通信装置から入出力される通信信号を、配線に対して重畳し、また、分離することにより、車両及び給電装置間で通信を行うことができる。　
In communication such as power line communication and inband communication, a superposed separator using a transformer having a first coil and a second coil is connected to wiring such as a power supply line, a ground line, and a control line. The superposition separator can communicate between the vehicle and the power feeding device by superimposing and separating the communication signal input / output from the communication device connected by the communication line on the wiring. .

　車両及び給電装置は、電力線通信又はinband通信をすべく、一対の給電線、又は接地線及び制御用線に一対の通信線を介して接続する通信装置を備えている。このような通信装置は、差動信号線である一対の通信線を介して進入するコモンモードノイズに対する耐性が求められる。コモンモードノイズに対する耐性を高めるため、例えば、通信線にコモンモードノイズを減衰させるためのコモンモードチョークコイルを介装する方法が実施されている。
The vehicle and the power supply device include a communication device that is connected to a pair of power supply lines or a ground line and a control line via a pair of communication lines in order to perform power line communication or inband communication. Such a communication device is required to be resistant to common mode noise that enters through a pair of communication lines that are differential signal lines. In order to increase resistance to common mode noise, for example, a method of interposing a common mode choke coil for attenuating common mode noise in a communication line is implemented.


　しかしながら、コモンモードチョークコイルだけでは十分にコモンモードノイズを減衰できない場合もあり、コモンモードノイズを更に減衰させる方法が求められている。　
However, there are cases in which common mode noise cannot be sufficiently attenuated with only the common mode choke coil, and a method for further attenuating common mode noise is required.

　コモンモードノイズに対する耐性は、ＢＣＩ（Bulk Current Injection）、ＤＰＩ（Direct Power Injection）、誘導ノイズ試験等の評価試験により評価することも可能である。　
Resistance to common mode noise can be evaluated by evaluation tests such as BCI (Bulk Current Injection), DPI (Direct Power Injection), and an induction noise test.

　図１２は、通信装置のコモンモードノイズに対する評価試験の一例を示す説明図である。図１２は、inband通信を行う通信装置１０００に対する評価試験としてＢＣＩ試験を実施するシステムを示している。ＢＣＩ試験は、ノイズを印加した際に通信途絶等の異常により誤動作が発生するか否かを評価する評価試験である。ここでは、図１２に示すように、ＢＣＩ試験を実施するシステムを用い、コモンモードノイズによる影響を通信装置１０００内の電圧値を測定することにより評価するものとする。図１２に示すように、通信装置１０００は、接地線（ＧＮＤ）及び制御用線（ＣＰＬＴ）に対し、重畳分離器１１００を介して接続されている。重畳分離器１１００と通信装置１０００とは、ＯＦＤＭ（Orthogonal Frequency Division Multiplexing）線等の一対の通信線にて接続されている。　
FIG. 12 is an explanatory diagram illustrating an example of an evaluation test for common mode noise of a communication device. FIG. 12 shows a system that performs a BCI test as an evaluation test for the communication apparatus 1000 that performs inband communication. The BCI test is an evaluation test for evaluating whether or not a malfunction occurs due to an abnormality such as communication interruption when noise is applied. Here, as shown in FIG. 12, a system that performs a BCI test is used, and the influence of common mode noise is evaluated by measuring a voltage value in the communication apparatus 1000. As shown in FIG. 12, the communication apparatus 1000 is connected to a ground line (GND) and a control line (CPLT) via a superposition separator 1100. Superposition separator 1100 and communication apparatus 1000 are connected by a pair of communication lines such as an OFDM (Orthogonal Frequency Division Multiplexing) line.

　通信装置１０００の内部において、一対の通信線にはコモンモードチョークコイル１００１が介装されている。コモンモードチョークコイル１００１を介して、一対の通信線は、送信側の回路に接続する一対の分岐線と受信側の回路に接続する一対の分岐線とに夫々分岐している。送信側の回路としては、送信保護回路（Ｔｘ保護回路）１００２が接続されており、送信保護回路１００２は、一対の接続線にてＡＦＥ（Analog Front End）回路１００３に接続されている。また、受信側の回路としては、バンドパスフィルタ（ＲｘＢＰＦ）１００４を介して受信保護回路（Ｒｘ保護回路）１００５が接続されており、受信保護回路１００５は、一対の接続線にてＡＦＥ回路１００３に接続されている。　
Inside the communication apparatus 1000, a common mode choke coil 1001 is interposed between the pair of communication lines. Through the common mode choke coil 1001, the pair of communication lines are branched into a pair of branch lines connected to the transmission side circuit and a pair of branch lines connected to the reception side circuit. A transmission protection circuit (Tx protection circuit) 1002 is connected as a circuit on the transmission side, and the transmission protection circuit 1002 is connected to an AFE (Analog Front End) circuit 1003 through a pair of connection lines. As a circuit on the reception side, a reception protection circuit (Rx protection circuit) 1005 is connected via a band pass filter (RxBPF) 1004. The reception protection circuit 1005 is connected to the AFE circuit 1003 by a pair of connection lines. It is connected.

　図１２に示す評価試験では、一対の通信線をカレントプローブ２０００に挿通し、カレントプローブ２０００により、擬似的にコモンモードノイズを発生させる。発生したコモンモードノイズは、図１２中に破線で示した矢印に示すようにＡＦＥ回路１００３へ進入する。ここで、受信保護回路１００５とＡＦＥ回路１００３とを接続する一対の接続線に印加される電圧値（ＲｘＩＮ＋，ＲｘＩＮ－）を計測する。計測により得られる電圧値は、進入したコモンモードノイズに影響されるため、コモンモードノイズが与える影響の評価に用いることができる。　
In the evaluation test shown in FIG. 12, a pair of communication lines are inserted into the current probe 2000, and the common probe noise is artificially generated by the current probe 2000. The generated common mode noise enters the AFE circuit 1003 as indicated by an arrow indicated by a broken line in FIG. Here, voltage values (RxIN +, RxIN−) applied to a pair of connection lines connecting the reception protection circuit 1005 and the AFE circuit 1003 are measured. Since the voltage value obtained by the measurement is affected by the entered common mode noise, it can be used for evaluating the influence of the common mode noise.

　図１３は、コモンモードノイズの評価試験の結果の一例を示すグラフである。図１３は、図１２に示す方法にて実施した評価試験の結果を、一対の接続線に印加される電圧値（ＲｘＩＮ＋，ＲｘＩＮ－）の経時変化として示している。図１３に示すように、同相の波形となる電圧値は、ＡＦＥ回路１００３に進入するコモンモードノイズ及びその影響をシミュレートすることになる。　
FIG. 13 is a graph showing an example of the result of the common mode noise evaluation test. FIG. 13 shows the result of the evaluation test carried out by the method shown in FIG. 12 as the change with time of the voltage values (RxIN +, RxIN−) applied to the pair of connection lines. As shown in FIG. 13, the voltage value having an in-phase waveform simulates common mode noise entering the AFE circuit 1003 and its influence.

　図１３は、図１２に示すコモンモードチョークコイル１００１により、コモンモードノイズを減衰させた場合の試験結果を示しているが、図中破線で囲んだ部分は、ピーク位置にも関わらず波形が平坦になっている。これは、受信保護回路１００５内に組み込まれたクリッピングダイオードの作用によるものである。クリッピングダイオードは、予め設定されているクランプレベルの範囲を超える信号に対し、振幅を抑制する機能を有している。図１３は、試験として進入したコモンモードノイズの振幅を抑制したものであるが、実装時に同様のコモンモードノイズが進入した場合には、コモンモードノイズと共に通信信号も抑制されることになる。通信信号に対する抑制が行われた場合、通信信号が部分的に消失し、通信途絶等の通信異常が発生することになる。　
FIG. 13 shows a test result when common mode noise is attenuated by the common mode choke coil 1001 shown in FIG. 12, but the portion surrounded by a broken line in the figure has a flat waveform regardless of the peak position. It has become. This is due to the action of a clipping diode incorporated in the reception protection circuit 1005. The clipping diode has a function of suppressing amplitude with respect to a signal exceeding a preset clamp level range. FIG. 13 shows the amplitude of common mode noise that has entered as a test, but if similar common mode noise enters during mounting, the communication signal is also suppressed along with the common mode noise. When suppression is performed on the communication signal, the communication signal is partially lost, and communication abnormality such as communication interruption occurs.

　本発明は斯かる事情に鑑みて成されたものであり、一対の通信線及び内部の回路を、第１コイル及び第２コイルにて電磁的に結合する接続部を設けることにより、コモンモードノイズを減衰させることが可能な通信装置及び通信システムの提供を目的とする。
The present invention has been made in view of such circumstances, and by providing a connection portion that electromagnetically couples a pair of communication lines and an internal circuit with a first coil and a second coil, common mode noise is provided. An object of the present invention is to provide a communication device and a communication system capable of attenuating noise.

　本発明に係る通信装置は、給電に用いる一対の給電線に夫々接続する一対の通信線を介して通信する通信装置において、前記一対の通信線を介した通信に係る処理を行う通信回路と、前記一対の通信線及び通信回路を接続している接続部とを備え、該接続部は、前記一対の通信線に両端が接続している第１コイルと、該第１コイルに電磁的に結合する第２コイルとを有し、該第２コイルの両端は、前記通信回路に接続していることを特徴とする。　
A communication apparatus according to the present invention is a communication apparatus that communicates via a pair of communication lines that are respectively connected to a pair of power supply lines used for power supply, and a communication circuit that performs processing related to communication via the pair of communication lines; A connection portion connecting the pair of communication lines and the communication circuit, the connection portion being electromagnetically coupled to the first coil and the first coil having both ends connected to the pair of communication lines. And the both ends of the second coil are connected to the communication circuit.

　本発明に係る通信装置は、給電制御に用いる制御信号を伝送する制御用線及び接地線に夫々接続する一対の通信線を介して通信する通信装置において、前記一対の通信線を介した通信に係る処理を行う通信回路と、前記一対の通信線及び通信回路を接続している接続部とを備え、該接続部は、前記一対の通信線に両端が接続している第１コイルと、該第１コイルに電磁的に結合する第２コイルとを有し、該第２コイルの両端は、前記通信回路に接続していることを特徴とする。　
A communication apparatus according to the present invention is a communication apparatus that communicates via a pair of communication lines that are connected to a control line that transmits a control signal used for power supply control and a ground line, respectively, and performs communication via the pair of communication lines. A communication circuit that performs the processing, and a connection part that connects the pair of communication lines and the communication circuit, the connection part including a first coil that is connected to the pair of communication lines at both ends; A second coil electromagnetically coupled to the first coil, and both ends of the second coil are connected to the communication circuit.

　本発明に係る通信装置は、前記通信回路は、前記一対の通信線に夫々接続する送信側回路及び受信側回路を含み、前記接続部は、前記一対の通信線及び前記受信側回路を接続していることを特徴とする。　
In the communication apparatus according to the present invention, the communication circuit includes a transmission side circuit and a reception side circuit that are connected to the pair of communication lines, respectively, and the connection unit connects the pair of communication lines and the reception side circuit. It is characterized by.

　本発明に係る通信システムは、給電装置と、該給電装置から給電される蓄電装置を搭載し、通信機能を有する車両とを、給電に用いる一対の給電線にて接続し、該給電線を媒体として通信信号を送受信する通信システムにおいて、前記給電装置及び車両の少なくとも一方は、前記通信装置を備え、該通信装置は、一対の通信線にて、前記一対の給電線に接続していることを特徴とする。　
A communication system according to the present invention includes a power feeding device and a vehicle having a power storage device fed from the power feeding device and having a communication function, connected by a pair of power feeding lines used for power feeding. In the communication system for transmitting and receiving communication signals, at least one of the power supply device and the vehicle includes the communication device, and the communication device is connected to the pair of power supply lines by a pair of communication lines. Features.

　本発明に係る通信システムは、給電装置と、該給電装置から給電される蓄電装置を搭載し、通信機能を有する車両とを、給電に用いる給電線、前記蓄電装置に対する給電制御に用いる制御信号を伝送する制御用線、及び接地線にて接続し、前記制御用線及び接地線を媒体として、前記制御信号と異なる通信信号を送受信する通信システムにおいて、前記給電装置及び車両の少なくとも一方は、前記通信装置を備え、該通信装置は、一対の通信線にて、前記制御用線及び接地線に接続していることを特徴とする。　
A communication system according to the present invention includes a power supply device and a power storage device powered by the power supply device, and a vehicle having a communication function, a power supply line used for power supply, and a control signal used for power supply control for the power storage device. In a communication system that transmits and transmits a communication signal different from the control signal using the control line and the ground line as a medium, and at least one of the power supply device and the vehicle, A communication device is provided, and the communication device is connected to the control line and the ground line by a pair of communication lines.

　本発明では、一対の通信線から進入するコモンモードノイズを第１コイルにて相殺することができる。
In the present invention, common mode noise entering from a pair of communication lines can be canceled by the first coil.

　本発明に係る通信装置及び通信システムでは、一対の通信線から進入するコモンモードノイズを、一対の通信線に両端が接続している第１コイルにて相殺し、かつ通信に係る信号については電磁誘導にて伝送することにより、コモンモードノイズに対する耐性を高めることが可能である等、優れた効果を奏する。
In the communication device and the communication system according to the present invention, common mode noise entering from a pair of communication lines is canceled by the first coil connected to both ends of the pair of communication lines, and signals related to communication are electromagnetic By transmitting by induction, it is possible to improve the resistance to common mode noise and the like, and thus excellent effects can be obtained.

本発明の実施の形態１に係る通信システムの構成例を示す説明図である。It is explanatory drawing which shows the structural example of the communication system which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る通信システムにて用いられる車両の通信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication apparatus of the vehicle used with the communication system which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る通信システムにて用いられる給電装置の通信部の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication part of the electric power feeder used with the communication system which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る通信システムの構成例を示す説明図である。It is explanatory drawing which shows the structural example of the communication system which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る通信システムにて用いられる車両の通信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication apparatus of the vehicle used with the communication system which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る通信システムにて用いられる給電装置の通信部の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication part of the electric power feeder used with the communication system which concerns on Embodiment 2 of this invention. 本発明の通信システムにて用いられる装置のコモンモードノイズに対する評価試験の一例を示す説明図である。It is explanatory drawing which shows an example of the evaluation test with respect to the common mode noise of the apparatus used with the communication system of this invention. 本発明の通信システムにて用いられる装置のコモンモードノイズの評価試験の結果の一例を示すグラフである。It is a graph which shows an example of the result of the evaluation test of the common mode noise of the apparatus used with the communication system of this invention. 本発明の他の実施の形態に係る通信システムにて用いられる通信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication apparatus used with the communication system which concerns on other embodiment of this invention. 本発明の他の実施の形態に係る通信システムにて用いられる通信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication apparatus used with the communication system which concerns on other embodiment of this invention. 本発明の他の実施の形態に係る通信システムにて用いられる通信装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the communication apparatus used with the communication system which concerns on other embodiment of this invention. 通信装置のコモンモードノイズに対する評価試験の一例を示す説明図である。It is explanatory drawing which shows an example of the evaluation test with respect to the common mode noise of a communication apparatus. コモンモードノイズの評価試験の結果の一例を示すグラフである。It is a graph which shows an example of the result of the evaluation test of common mode noise.

　以下、本発明をその実施の形態を示す図面に基づいて詳述する。　
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

実施の形態１．
　図１は、本発明の実施の形態１に係る通信システムの構成例を示す説明図である。図１は、本発明を、電気自動車、プラグインハイブリッド車等の車両１が備えるバッテリ（蓄電装置）１０に対し、充電スタンド等の給電装置２から給電する形態に適用する例を示している。　
Embodiment 1 FIG.
FIG. 1 is an explanatory diagram showing a configuration example of a communication system according to Embodiment 1 of the present invention. FIG. 1 shows an example in which the present invention is applied to a form in which a battery (power storage device) 10 provided in a vehicle 1 such as an electric vehicle or a plug-in hybrid vehicle is fed from a power feeding device 2 such as a charging stand.

　車両１及び給電装置２の間は、充電ケーブル３により接続することが可能である。充電ケーブル３は、電力供給線として用いられる一対の給電線３１、３２、充電制御に用いるコントロールパイロット信号（ＣＰＬＴ）等の制御信号を伝送する制御用線３３、及び接地用の導線である接地線３４を内包している。充電ケーブル３の一端は、給電装置２側に接続されており、他端側を車両１側の車載給電口として配設されている受電コネクタ１１に接続することができる。充電ケーブル３の他端を受電コネクタ１１に接続することにより、図１に例示する回路構成となる。　
The vehicle 1 and the power supply device 2 can be connected by a charging cable 3. The charging cable 3 includes a pair of power supply lines 31 and 32 used as power supply lines, a control line 33 that transmits a control signal such as a control pilot signal (CPLT) used for charging control, and a grounding line that is a grounding conductor. 34 is included. One end of the charging cable 3 is connected to the power feeding device 2 side, and the other end side can be connected to a power receiving connector 11 arranged as an in-vehicle power feeding port on the vehicle 1 side. By connecting the other end of the charging cable 3 to the power receiving connector 11, the circuit configuration illustrated in FIG. 1 is obtained.

　給電線３１、３２は、交流電圧が印加されるＡＣ線である。制御用線３３は、コントロールパイロット信号等の制御信号を送受信する信号線であり、給電装置２及び充電制御装置１３間が接続された場合に送受信されるコントロールパイロット信号に基づいて充電制御が行われる。また、給電線３１、３２は、車両認証、充電管理、課金管理等の管理を行うための情報、その他各種情報を伝送する媒体として用いることも可能である。即ち、車両１は、給電線３１、３２に対し、通信信号を重畳及び分離することにより給電装置２と通信を行うことが可能である。　
The feeder lines 31 and 32 are AC lines to which an AC voltage is applied. The control line 33 is a signal line for transmitting / receiving a control signal such as a control pilot signal, and charging control is performed based on a control pilot signal transmitted / received when the power feeding apparatus 2 and the charging control apparatus 13 are connected. . The power supply lines 31 and 32 can also be used as a medium for transmitting information for performing management such as vehicle authentication, charging management, billing management, and other various information. That is, the vehicle 1 can communicate with the power feeding device 2 by superimposing and separating the communication signals on the power feeding lines 31 and 32.

　給電装置２は、交流電力を供給する電力供給部２０と、充電制御に係る通信を行う充電制御部２１と、通信信号の入出力を行う通信部（通信装置）２２と、通信部２２から入出力される通信信号を給電線３１、３２に重畳分離する重畳分離部２３とを備えている。　
The power supply device 2 is input from the power supply unit 20 that supplies AC power, the charging control unit 21 that performs communication related to charging control, the communication unit (communication device) 22 that performs input and output of communication signals, And a superposition / separation unit 23 that superimposes and separates the output communication signal on the power supply lines 31 and 32.

　電力供給部２０には、給電線３１、３２の一端が接続されている。充電制御部２１には、制御用線３３の一端が接続されている。給電装置２内の配線は、給電装置２外部の充電ケーブル３に内包された給電線３１、３２、制御用線３３及び接地線３４に接続された延長線として機能する内部導線ということになるが、以降の説明では、便宜上、内部導線として配設された延長線部分も含めて、給電線３１、３２、制御用線３３及び接地線３４として説明する。　
One end of power supply lines 31 and 32 is connected to the power supply unit 20. One end of a control line 33 is connected to the charging control unit 21. The wiring in the power feeding apparatus 2 is an internal conductor that functions as an extension line connected to the power feeding lines 31 and 32, the control line 33, and the ground line 34 included in the charging cable 3 outside the power feeding apparatus 2. In the following description, for convenience, the power supply lines 31 and 32, the control line 33, and the ground line 34 will be described including the extended line portion disposed as the internal conductor.

　充電制御部２１は、例えば、充電制御に関する国際規格に準拠した出力側の回路であり、コントロールパイロット信号等の制御信号を送受信することにより、接続確認、通電開始等の様々な状態における充電制御を行う。　
The charge control unit 21 is, for example, an output-side circuit that conforms to an international standard related to charge control, and transmits and receives control signals such as control pilot signals, thereby performing charge control in various states such as connection confirmation and energization start. Do.

　通信部２２は、一対の給電線３１、３２に夫々接続する一対の通信線２４、２５を介して通信信号を送受信することにより通信する通信装置である。一対の通信線２４、２５には、重畳分離部２３が介装されている。　
The communication unit 22 is a communication device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the pair of power supply lines 31 and 32, respectively. A superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.

　重畳分離部２３は、カップリングトランス（電磁誘導式の信号変換器等の回路）等の回路及びコンデンサ等の素子を用いて構成される。カップリングトランスは、給電線３１、３２側の通信線２４、２５にコンデンサを介して両端が接続される第１コイル４１ａと、第１コイル４１ａに電磁的に結合され、通信部２２側の通信線２４、２５に両端が接続される第２コイル４１ｂとを備えている。コンデンサは、給電線３１、３２を介して供給される交流電力に対してはハイインピーダンスとなり、数十～数百ｋＨｚの低速通信用の帯域又は数ＭＨｚ～数十ＭＨｚの高速通信用の帯域を用いる通信信号に対してはローインピーダンスとなる。即ち、コンデンサは、給電線３１、３２から分岐する伝送経路において、通信信号に用いられる周波数帯域の信号を透過し、交流電力に用いられる周波数帯域の信号を遮断する。　
The superposition / separation unit 23 is configured using a circuit such as a coupling transformer (a circuit such as an electromagnetic induction signal converter) and an element such as a capacitor. The coupling transformer is electromagnetically coupled to the first coil 41a and the first coil 41a, both ends of which are connected to the communication lines 24 and 25 on the power supply lines 31 and 32 via capacitors, and communication on the communication unit 22 side. And a second coil 41b having both ends connected to the wires 24 and 25. The capacitor has a high impedance with respect to the AC power supplied via the feeder lines 31 and 32, and has a band for low speed communication of several tens to several hundred kHz or a band for high speed communication of several MHz to several tens of MHz. It becomes low impedance for the communication signal to be used. That is, the capacitor transmits a signal in a frequency band used for a communication signal and cuts off a signal in a frequency band used for AC power in a transmission path branched from the feeder lines 31 and 32.

　重畳分離部２３が、通信部２２から出力される各種通信信号を通信線２４、２５から給電線３１、３２に対して重畳し、また、給電線３１、３２から分離した各種通信信号を通信部２２に入力することにより、給電線３１、３２を媒体とした電力線通信が行われる。即ち、給電装置２は、通信装置として、通信部２２を備えているが、自らが電力線通信を行う通信装置としても機能すると見なすことも可能である。　
The superimposing / separating unit 23 superimposes various communication signals output from the communication unit 22 on the power supply lines 31 and 32 from the communication lines 24 and 25 and also transmits various communication signals separated from the power supply lines 31 and 32 to the communication unit. 22, power line communication using the feeder lines 31 and 32 as a medium is performed. That is, the power feeding device 2 includes the communication unit 22 as a communication device, but it can also be regarded as functioning as a communication device that performs power line communication.

　車両１は、バッテリ１０及び受電コネクタ１１の他、バッテリ１０に対する充電を行う充電装置１２と、充電制御に係る通信を行う充電制御装置１３と、通信信号の送受信を行う通信装置１４と、一対の給電線３１、３２に対して通信信号の重畳及び分離を行う重畳分離器１５とを備えている。　
The vehicle 1 includes a battery 10 and a power receiving connector 11, a charging device 12 that charges the battery 10, a charging control device 13 that performs communication related to charging control, a communication device 14 that transmits and receives communication signals, And a superimposition separator 15 that superimposes and separates communication signals on the power supply lines 31 and 32.

　車両１内には、給電線３１、３２、制御用線３３及び接地線３４に接続される車両内配線が配設されている。給電線３１、３２に接続される車両内配線は、充電装置１２に接続されるＡＣ線であり、充電装置１２によりバッテリ１０に対する充電が行われる。制御用線３３に接続される車両内配線は、延長線を介して充電制御装置１３に接続されている。接地線３４に接続される車両内配線は、車体接地（body earth）されている。なお、以降の説明において、特に区分する必要がない場合、便宜上、各車内配線、ＡＣ線、延長線をも含めて、給電線３１、３２、制御用線３３及び接地線３４として説明する。　
In the vehicle 1, in-vehicle wiring connected to the feeder lines 31 and 32, the control line 33 and the ground line 34 is disposed. The in-vehicle wiring connected to the power supply lines 31 and 32 is an AC line connected to the charging device 12, and the battery 10 is charged by the charging device 12. The in-vehicle wiring connected to the control line 33 is connected to the charging control device 13 via an extension line. The in-vehicle wiring connected to the ground line 34 is body earthed. In the following description, when there is no particular need to divide, for the sake of convenience, the description will be made as the power supply lines 31, 32, the control line 33, and the ground line 34 including the in-vehicle wiring, the AC line, and the extension line.

　充電制御装置１３は、例えば、充電制御に関する国際規格に準拠した入力側の回路であり、コントロールパイロット信号等の制御信号を送受信することにより、接続確認、通信開始等の様々な状態における充電制御を行う。　
The charge control device 13 is, for example, an input-side circuit that conforms to an international standard related to charge control, and performs charge control in various states such as connection confirmation and communication start by transmitting and receiving control signals such as control pilot signals. Do.

　通信装置１４は、一対の給電線３１、３２に夫々接続する一対の通信線１６、１７を介して通信信号を送受信することにより通信する装置である。一対の通信線１６、１７には、重畳分離器１５が介装されている。　
The communication device 14 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively. A superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.

　重畳分離器１５は、カップリングトランス等の回路及びコンデンサ等の素子を用いて構成される。カップリングトランスは、給電線３１、３２側の通信線１６、１７にコンデンサを介して両端が接続される第１コイル４６ａと、第１コイル４６ａに電磁的に結合され、通信装置１４側の通信線１６、１７に両端が接続される第２コイル４６ｂとを備えている。コンデンサは、給電線３１、３２を介して供給される交流電力に対してはハイインピーダンスとなり、数十～数百ｋＨｚの低速通信用の帯域又は数ＭＨｚ～数十ＭＨｚの高速通信用の帯域を用いる通信信号に対してはローインピーダンスとなる。即ち、コンデンサは、給電線３１、３２から分岐する伝送経路において、通信信号に用いられる周波数帯域の信号を透過し、交流電力に用いられる周波数帯域の信号を遮断する。　
The superposition separator 15 is configured using a circuit such as a coupling transformer and an element such as a capacitor. The coupling transformer is electromagnetically coupled to the first coil 46a, both ends of which are connected to the communication lines 16 and 17 on the power supply lines 31 and 32 via capacitors, and communication on the communication device 14 side. A second coil 46b having both ends connected to the wires 16 and 17; The capacitor has a high impedance with respect to the AC power supplied via the feeder lines 31 and 32, and has a band for low speed communication of several tens to several hundred kHz or a band for high speed communication of several MHz to several tens of MHz. It becomes low impedance for the communication signal to be used. That is, the capacitor transmits a signal in a frequency band used for a communication signal and cuts off a signal in a frequency band used for AC power in a transmission path branched from the feeder lines 31 and 32.

　重畳分離器１５が、通信装置１４から出力される各種通信信号を通信線１６、１７から給電線３１、３２に対して重畳し、また、給電線３１、３２から分離した各種通信信号を通信装置１４に入力することにより、給電線３１、３２を媒体とした電力線通信が行われる。　
The superimposing / separating device 15 superimposes various communication signals output from the communication device 14 on the power supply lines 31 and 32 from the communication lines 16 and 17 and also transmits various communication signals separated from the power supply lines 31 and 32 to the communication device. 14, power line communication using the feeder lines 31 and 32 as a medium is performed.

　図１に示す形態の例では、重畳分離器１５、通信線１６、１７、給電線３１、３２、通信線２４、２５、重畳分離部２３及びその他の配線、素子、回路により通信信号を伝送するループ回路が形成される。これにより、車両１内の通信装置１４及び給電装置２の通信部２２間で、給電線３１、３２に対して通信信号を重畳する電力線通信を実現することが可能となる。　
In the example of the form shown in FIG. 1, a communication signal is transmitted by the superimposition separator 15, the communication lines 16 and 17, the feeder lines 31 and 32, the communication lines 24 and 25, the superposition / separation unit 23, and other wirings, elements, and circuits. A loop circuit is formed. Thereby, it becomes possible to implement | achieve the power line communication which superimposes a communication signal with respect to the feeder lines 31 and 32 between the communication apparatus 14 in the vehicle 1, and the communication part 22 of the feeder apparatus 2. FIG.

　図２は、本発明の実施の形態１に係る通信システムにて用いられる車両１の通信装置１４の構成例を示すブロック図である。図２に示すように、通信装置１４は、一対の給電線３１、３２に夫々接続される一対の通信線１６、１７に接続されている。車両１が備える通信装置１４は、一対の給電線３１、３２に夫々接続される一対の通信線１６、１７を介して通信信号を送受信することにより通信する装置である。一対の通信線１６、１７には、重畳分離器１５が介装されており、重畳分離器１５及び通信装置１４を接続する通信線１６、１７は、ＯＦＤＭ（Orthogonal Frequency Division Multiplexing）線として用いられる。　
FIG. 2 is a block diagram illustrating a configuration example of the communication device 14 of the vehicle 1 used in the communication system according to Embodiment 1 of the present invention. As shown in FIG. 2, the communication device 14 is connected to a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively. The communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a pair of power supply lines 31 and 32, respectively. A pair of communication lines 16 and 17 are provided with a superposition separator 15, and the communication lines 16 and 17 connecting the superposition separator 15 and the communication device 14 are used as OFDM (Orthogonal Frequency Division Multiplexing) lines. .

　通信装置１４の内部において、一対の通信線１６、１７には、コモンモードチョークコイル１４０が介装されている。コモンモードチョークコイル１４０は、通信装置１４の内部に進入するコモンモードノイズを減衰させる機能、及び通信装置１４内から外部へ進出するコモンモードノイズを減衰させる機能を有している。なお、本発明の通信装置１４は、コモンモードチョークコイル１４０によっても抑制しきれず、内部に進入したコモンモードノイズを更に抑制する機能を有する。　
In the communication device 14, a common mode choke coil 140 is interposed between the pair of communication lines 16 and 17. The common mode choke coil 140 has a function of attenuating common mode noise that enters the inside of the communication device 14 and a function of attenuating common mode noise that advances from the inside of the communication device 14 to the outside. Note that the communication device 14 of the present invention cannot be suppressed even by the common mode choke coil 140 and has a function of further suppressing common mode noise entering the inside.

　一対の通信線１６、１７は、コモンモードチョークコイル１４０を介して通信回路に接続されている。通信回路は、送信側の回路と受信側の回路とを備え、一対の通信線１６、１７は、送信側の回路に接続する一対の分岐線１６ａ、１７ａと、受信側の回路に接続する一対の分岐線１６ｂ、１７ｂとに夫々分岐している。　
The pair of communication lines 16 and 17 are connected to the communication circuit via the common mode choke coil 140. The communication circuit includes a transmission side circuit and a reception side circuit, and the pair of communication lines 16 and 17 includes a pair of branch lines 16a and 17a connected to the transmission side circuit and a pair connected to the reception side circuit. Branch lines 16b and 17b.

　送信側の回路としては、送信保護回路（Ｔｘ保護回路）１４１が接続されており、送信保護回路１４１は、一対の接続線にてＡＦＥ（Analog Front End）回路１４２に接続されている。また、受信側の回路としては、バンドパスフィルタ（ＲｘＢＰＦ）１４３を介して受信保護回路（Ｒｘ保護回路）１４４が接続されており、受信保護回路１４４は、一対の接続線にてＡＦＥ回路１４２に接続されている。　
A transmission protection circuit (Tx protection circuit) 141 is connected as a circuit on the transmission side, and the transmission protection circuit 141 is connected to an AFE (Analog Front End) circuit 142 through a pair of connection lines. As a circuit on the reception side, a reception protection circuit (Rx protection circuit) 144 is connected via a bandpass filter (RxBPF) 143, and the reception protection circuit 144 is connected to the AFE circuit 142 by a pair of connection lines. It is connected.

　受信側の回路に接続している一対の分岐線１６ｂ、１７ｂには、トランス等の回路を用いた接続回路（接続部）１４５が介装されている。接続回路１４５は、電磁的に結合する第１コイル１４５ａ及び第２コイル１４５ｂを備えている。第１コイル１４５ａの両端は、一対の分岐線１６ｂ、１７ｂを介して一対の通信線１６、１７に接続しており、第２コイル１４５ｂの両端は、受信保護回路１４４に接続している。　
A connection circuit (connection unit) 145 using a circuit such as a transformer is interposed between the pair of branch lines 16b and 17b connected to the circuit on the reception side. The connection circuit 145 includes a first coil 145a and a second coil 145b that are electromagnetically coupled. Both ends of the first coil 145a are connected to the pair of communication lines 16 and 17 via the pair of branch lines 16b and 17b, and both ends of the second coil 145b are connected to the reception protection circuit 144.

　図２に示す例では、巻線数が略等しい第１コイル１４５ａ及び第２コイル１４５ｂを備えるトランスを接続回路１４５として用い、一対の通信線１６、１７と受信保護回路１４４とを接続している。巻線数が略等しい第１コイル１４５ａ及び第２コイル１４５ｂを備えるトランスを接続回路１４５として用いることにより、第１コイル１４５ａ側に印加される通信信号と略等しい通信信号が電磁誘導により第２コイル１４５ｂ側に誘起される。ただし、一対の通信線１６、１７から一対の分岐線１６ｂ、１７ｂを介して進入する同相のコモンモードノイズは、一対の分岐線１６ｂ、１７ｂに両端が接続されている第１コイル１４５ａにて相殺されることになる。従って、第２コイル１４５ｂ側にコモンモードノイズに基づく信号が誘起されることはなく、一対の通信線１６、１７から受信保護回路１４４へのコモンモードノイズの進入を抑制することができる。このように、接続回路１４５は、受信側の回路へ進入するコモンモードノイズを減衰させる機能を有する。　
In the example shown in FIG. 2, a transformer including a first coil 145a and a second coil 145b having substantially the same number of windings is used as the connection circuit 145, and the pair of communication lines 16 and 17 and the reception protection circuit 144 are connected. . By using a transformer including the first coil 145a and the second coil 145b having substantially the same number of windings as the connection circuit 145, a communication signal substantially equal to the communication signal applied to the first coil 145a side is generated by the electromagnetic induction. It is induced on the 145b side. However, in-phase common mode noise entering from the pair of communication lines 16 and 17 via the pair of branch lines 16b and 17b is canceled by the first coil 145a having both ends connected to the pair of branch lines 16b and 17b. Will be. Therefore, a signal based on common mode noise is not induced on the second coil 145b side, and entry of common mode noise from the pair of communication lines 16 and 17 to the reception protection circuit 144 can be suppressed. Thus, the connection circuit 145 has a function of attenuating common mode noise that enters the circuit on the reception side.

　図３は、本発明の実施の形態１に係る通信システムにて用いられる給電装置２の通信部２２の構成例を示すブロック図である。図３に示すように、通信部２２は、一対の給電線３１、３２に夫々接続される一対の通信線２４、２５に接続されている。給電装置２が備える通信部２２は、一対の給電線３１、３２に夫々接続される一対の通信線２４、２５を介して通信信号を送受信することにより通信する装置である。一対の通信線２４、２５には、重畳分離部２３が介装されている。　
FIG. 3 is a block diagram illustrating a configuration example of the communication unit 22 of the power feeding device 2 used in the communication system according to Embodiment 1 of the present invention. As shown in FIG. 3, the communication unit 22 is connected to a pair of communication lines 24 and 25 that are connected to a pair of power supply lines 31 and 32, respectively. The communication unit 22 included in the power supply apparatus 2 is an apparatus that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the pair of power supply lines 31 and 32, respectively. A superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.

　通信部２２の内部において、一対の通信線２４、２５は、コモンモードチョークコイル２２０を介して、送信側の回路に接続する一対の分岐線２４ａ、２５ａと、受信側の回路に接続する一対の分岐線２４ｂ、２５ｂとに夫々分岐している。　
Inside the communication unit 22, the pair of communication lines 24 and 25 are connected via a common mode choke coil 220 to a pair of branch lines 24 a and 25 a connected to a transmission side circuit and a pair of connection lines connected to a reception side circuit. Branches to branch lines 24b and 25b, respectively.

　送信側の回路としては、送信保護回路（Ｔｘ保護回路）２２１が接続されており、送信保護回路２２１は、一対の接続線にてＡＦＥ回路２２２に接続されている。また、受信側の回路としては、バンドパスフィルタ（ＲｘＢＰＦ）２２３を介して受信保護回路（Ｒｘ保護回路）２２４が接続されており、受信保護回路２２４は、一対の接続線にてＡＦＥ回路２２２に接続されている。　
A transmission protection circuit (Tx protection circuit) 221 is connected as a circuit on the transmission side, and the transmission protection circuit 221 is connected to the AFE circuit 222 by a pair of connection lines. As a circuit on the reception side, a reception protection circuit (Rx protection circuit) 224 is connected via a bandpass filter (RxBPF) 223, and the reception protection circuit 224 is connected to the AFE circuit 222 by a pair of connection lines. It is connected.

　受信側の回路に接続している一対の分岐線２４ｂ、２５ｂには、トランス等の回路を用いた接続回路（接続部）２２５が介装されている。接続回路２２５は、電磁的に結合する第１コイル２２５ａ及び第２コイル２２５ｂを備えている。第１コイル２２５ａの両端は、一対の分岐線２４ｂ、２５ｂを介して一対の通信線２４、２５に接続しており、第２コイル２２５ｂの両端は、受信保護回路２２４に接続している。　
A connection circuit (connection unit) 225 using a circuit such as a transformer is interposed between the pair of branch lines 24b and 25b connected to the circuit on the reception side. The connection circuit 225 includes a first coil 225a and a second coil 225b that are electromagnetically coupled. Both ends of the first coil 225a are connected to the pair of communication lines 24, 25 via a pair of branch lines 24b, 25b, and both ends of the second coil 225b are connected to the reception protection circuit 224.

　なお、通信部２２の各構成は、図２を用いて説明した通信装置１４の構成と実質的に同様であるので、詳細な説明については省略する。　
The configuration of the communication unit 22 is substantially the same as the configuration of the communication device 14 described with reference to FIG.

実施の形態２．
　実施の形態２は、実施の形態１において、inband通信に係る通信システムに適用する形態である。なお、以降の説明において、実施の形態１と同様の構成については、実施の形態１と同様の符号を付し、実施の形態１を参照するものとし、その詳細な説明を省略する。　
Embodiment 2. FIG.
Embodiment 2 is a form applied to the communication system which concerns on inband communication in Embodiment 1. FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the first embodiment is referred to and detailed description thereof is omitted.

　図４は、本発明の実施の形態２に係る通信システムの構成例を示す説明図である。実施の形態２において、給電装置２が備える通信部２２は、制御用線３３及び接地線３４に夫々接続する一対の通信線２４、２５を介して通信信号を送受信することにより通信する通信装置である。一対の通信線２４、２５には、重畳分離部２３が介装されている。　
FIG. 4 is an explanatory diagram showing a configuration example of a communication system according to Embodiment 2 of the present invention. In the second embodiment, the communication unit 22 included in the power feeding device 2 is a communication device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to the control line 33 and the ground line 34, respectively. is there. A superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.

　重畳分離部２３が、通信部２２から出力される各種通信信号を通信線２４、２５から制御用線３３及び接地線３４に対して重畳し、また、制御用線３３及び接地線３４から分離した各種通信信号を通信部２２に入力することにより、制御用線３３及び接地線３４を媒体としたinband通信が行われる。即ち、給電装置２は、通信装置として、通信部２２を備えているが、自らが電力線通信を行う通信装置としても機能する。　
The superposition / separation unit 23 superimposes various communication signals output from the communication unit 22 on the control line 33 and the ground line 34 from the communication lines 24 and 25, and separates the communication signal from the control line 33 and the ground line 34. By inputting various communication signals to the communication unit 22, inband communication using the control line 33 and the ground line 34 as a medium is performed. That is, the power supply apparatus 2 includes the communication unit 22 as a communication apparatus, but also functions as a communication apparatus that performs power line communication.

　車両１が備える通信装置１４は、制御用線３３及び接地線３４に夫々接続される一対の通信線１６、１７を介して通信信号を送受信することにより通信する装置である。一対の通信線１６、１７には、重畳分離器１５が介装されている。　
The communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a control line 33 and a ground line 34, respectively. A superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.

　重畳分離器１５が、通信装置１４から出力される各種通信信号を通信線１６、１７から制御用線３３及び接地線３４に対して重畳し、また、制御用線３３及び接地線３４から分離した各種通信信号を通信装置１４に入力することにより、制御用線３３及び接地線３４を媒体としたinband通信が行われる。　
The superimposing separator 15 superimposes various communication signals output from the communication device 14 on the control line 33 and the ground line 34 from the communication lines 16 and 17, and separates them from the control line 33 and the ground line 34. By inputting various communication signals to the communication device 14, inband communication using the control line 33 and the ground line 34 as a medium is performed.

　実施の形態２では、重畳分離器１５、通信線１６、１７、制御用線３３、接地線３４、通信線２４、２５、重畳分離部２３及びその他の配線、素子、回路により通信信号を伝送するループ回路が形成される。これにより、車両１内の通信装置１４及び給電装置２の通信部２２間で、制御用線３３及び接地線３４に対して通信信号を重畳するinband通信を実現することが可能となる。　
In the second embodiment, a communication signal is transmitted by the superimposition separator 15, the communication lines 16 and 17, the control line 33, the ground line 34, the communication lines 24 and 25, the superposition separation unit 23, and other wirings, elements, and circuits. A loop circuit is formed. Thereby, in-band communication in which a communication signal is superimposed on the control line 33 and the ground line 34 can be realized between the communication device 14 in the vehicle 1 and the communication unit 22 of the power feeding device 2.

　図５は、本発明の実施の形態２に係る通信システムにて用いられる車両１の通信装置１４の構成例を示すブロック図である。図５に示すように、通信装置１４は、制御用線３３及び接地線３４に夫々接続される一対の通信線１６、１７に接続されている。車両１が備える通信装置１４は、制御用線３３及び接地線３４に夫々接続される一対の通信線１６、１７を介して通信信号を送受信することにより通信する装置である。一対の通信線１６、１７には、重畳分離器１５が介装されている。　
FIG. 5 is a block diagram showing a configuration example of the communication device 14 of the vehicle 1 used in the communication system according to Embodiment 2 of the present invention. As shown in FIG. 5, the communication device 14 is connected to a pair of communication lines 16 and 17 that are connected to a control line 33 and a ground line 34, respectively. The communication device 14 included in the vehicle 1 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 16 and 17 connected to a control line 33 and a ground line 34, respectively. A superimposing / separating device 15 is interposed between the pair of communication lines 16 and 17.

　なお、実施の形態２に係る通信システムにて用いられる通信装置１４の内部の構成は、実施の形態１に係る通信装置１４と同様であるので、実施の形態１を参照するものとし、その詳細な説明を省略する。　
The internal configuration of the communication device 14 used in the communication system according to the second embodiment is the same as that of the communication device 14 according to the first embodiment. The detailed explanation is omitted.

　図６は、本発明の実施の形態２に係る通信システムにて用いられる給電装置２の通信部２２の構成例を示すブロック図である。図６に示すように、通信部２２は、制御用線３３及び接地線３４に夫々接続される一対の通信線２４、２５に接続されている。給電装置２が備える通信部２２は、制御用線３３及び接地線３４に夫々接続される一対の通信線２４、２５を介して通信信号を送受信することにより通信する装置である。一対の通信線２４、２５には、重畳分離部２３が介装されている。　
FIG. 6 is a block diagram illustrating a configuration example of the communication unit 22 of the power feeding device 2 used in the communication system according to Embodiment 2 of the present invention. As shown in FIG. 6, the communication unit 22 is connected to a pair of communication lines 24 and 25 that are connected to a control line 33 and a ground line 34, respectively. The communication unit 22 included in the power supply device 2 is a device that communicates by transmitting and receiving communication signals via a pair of communication lines 24 and 25 connected to a control line 33 and a ground line 34, respectively. A superposition / separation unit 23 is interposed between the pair of communication lines 24 and 25.

　なお、実施の形態２に係る通信システムにて用いられる通信部２２の内部の構成は、実施の形態１に係る通信部２２と同様であるので、実施の形態１を参照するものとし、その説明を省略する。　
The internal configuration of the communication unit 22 used in the communication system according to the second embodiment is the same as that of the communication unit 22 according to the first embodiment. Is omitted.

　次に本発明の通信システムに用いられる装置のコモンモードノイズに対する評価試験について説明する。図７は、本発明の通信システムにて用いられる装置のコモンモードノイズに対する評価試験の一例を示す説明図である。図７は、実施の形態２において、図５を用いて説明したinband通信を行う車両１が備える通信装置１４に対する評価試験を実施するシステムを示している。図７に示す評価試験は、ＢＣＩ試験を実施するシステムを用い、コモンモードノイズによる影響を通信装置１４内の電圧値を測定することにより評価するものである。　
Next, an evaluation test for common mode noise of a device used in the communication system of the present invention will be described. FIG. 7 is an explanatory diagram showing an example of an evaluation test for common mode noise of a device used in the communication system of the present invention. FIG. 7 shows a system that performs an evaluation test on the communication device 14 included in the vehicle 1 that performs the inband communication described with reference to FIG. 5 in the second embodiment. The evaluation test shown in FIG. 7 evaluates the influence of common mode noise by measuring the voltage value in the communication device 14 using a system that performs the BCI test.

　図７に示す評価試験では、一対の通信線１６、１７をカレントプローブ４に挿通し、カレントプローブ４より、擬似的にコモンモードノイズを発生させる。発生したコモンモードノイズは、図７中に破線で示した矢印で示すように、カレントプローブ４側から通信装置１４へ進入する。しかしながら、本発明に係る通信装置１４では、接続回路１４５にてコモンモードノイズが相殺されることにより、受信保護回路１４４への進入を抑制する。このような効果を検証するため、受信保護回路１４４とＡＦＥ回路１４２とを接続する一対の接続線に印加される電圧値（ＲｘＩＮ＋，ＲｘＩＮ－）を計測することにより、進入したコモンモードノイズが与える影響について評価を行う。　
In the evaluation test shown in FIG. 7, a pair of communication lines 16 and 17 are inserted into the current probe 4 and pseudo common mode noise is generated from the current probe 4. The generated common mode noise enters the communication device 14 from the current probe 4 side as indicated by an arrow indicated by a broken line in FIG. However, in the communication device 14 according to the present invention, the common mode noise is canceled by the connection circuit 145, thereby suppressing entry into the reception protection circuit 144. In order to verify such an effect, the voltage values (RxIN +, RxIN−) applied to the pair of connection lines connecting the reception protection circuit 144 and the AFE circuit 142 are measured, thereby giving the entered common mode noise. Assess the impact.

　図８は、本発明の通信システムにて用いられる装置のコモンモードノイズの評価試験の結果の一例を示すグラフである。図８は、図７に示す方法にて実施した評価試験の結果を、一対の接続線に印加される電圧値（ＲｘＩＮ＋，ＲｘＩＮ－）の経時変化として示している。図８に示すように、同相の波形となる電圧値は、ＡＦＥ回路１４２に進入するコモンモードノイズ及びその影響をシミュレートすることになる。　
FIG. 8 is a graph showing an example of the result of the common mode noise evaluation test of the device used in the communication system of the present invention. FIG. 8 shows the result of the evaluation test carried out by the method shown in FIG. 7 as a change with time in the voltage values (RxIN +, RxIN−) applied to the pair of connection lines. As shown in FIG. 8, the voltage value having an in-phase waveform simulates common mode noise entering the AFE circuit 142 and its influence.

　図８に示すように、一対の接続線に印加される電圧値（ＲｘＩＮ＋，ＲｘＩＮ－）は、いずれもほぼ平坦な波形となっている。これは、カレントプローブ４にて発生した擬似的なコモンモードノイズが一対の誘導素子１４５、１４６から流出することにより、十分減衰し、ＡＦＥ回路１４２には進入していないことを示している。図８に示すグラフを、従来のシステムに対する試験結果を示す図１３のグラフと比較すると、本発明の通信システムにて用いられる通信装置１４等の装置が、コモンモードノイズの減衰について、顕著な効果を奏していることが明らかである。　
As shown in FIG. 8, the voltage values (RxIN +, RxIN−) applied to the pair of connection lines have almost flat waveforms. This indicates that the pseudo common mode noise generated in the current probe 4 is sufficiently attenuated by flowing out from the pair of inductive elements 145 and 146 and does not enter the AFE circuit 142. When the graph shown in FIG. 8 is compared with the graph of FIG. 13 showing the test results for the conventional system, the communication device 14 and the like used in the communication system of the present invention have a remarkable effect on the attenuation of the common mode noise. It is clear that

　図８に示すように、コモンモードノイズによる波形のピークは小さいため、受信保護回路１４４内に組み込まれたクリッピングダイオードにより、振幅が抑制されることがない。従って、通信信号が抑制されることをも防止することができる。よって、通信信号の部分的な消失による通信途絶等の通信異常の発生を防止することができる。　
As shown in FIG. 8, since the peak of the waveform due to common mode noise is small, the clipping diode incorporated in the reception protection circuit 144 does not suppress the amplitude. Therefore, it is possible to prevent the communication signal from being suppressed. Therefore, it is possible to prevent occurrence of communication abnormality such as communication interruption due to partial loss of communication signals.
　前記実施の形態は、本発明の無数に存在する実施例の一部を開示したに過ぎず、目的、用途、仕様等の様々な要因を加味して適宜設計することが可能である。例えば、コモンモードノイズに対してローインピーダンスとなる一対の誘導素子は、受信側回路に接続する一対の分岐線に接続するのではなく、送信側及び受信側の分岐前の一対の通信線に接続するようにしても良い。 The above embodiment only discloses a part of the infinite number of embodiments of the present invention, and can be appropriately designed in consideration of various factors such as purpose, application, and specifications. For example, a pair of inductive elements that have low impedance against common mode noise is not connected to a pair of branch lines connected to the reception side circuit, but to a pair of communication lines before branching on the transmission side and reception side You may make it do.

　図９、図１０及び図１１は、本発明の他の実施の形態に係る通信システムにて用いられる通信装置の構成例を示すブロック図である。図９、図１０及び図１１は、実施の形態２として示したinband通信を行う車両１の通信装置１４を、他の形態に展開した例を示している。図９、図１０及び図１１は、図５を用いて示した通信装置１４において、重畳分離器１５から送信側と受信側とに分岐するまでの間に、電磁的に結合する第１コイル１４５ａ及び第２コイル１４５ｂを備えるトランス等の接続回路１４５を介装して構成である。第１コイル１４５ａの両端は、一対の通信線１６、１７側に接続されており、第２コイル１４５ｂの両端は、通信回路側に接続されている。　
9, FIG. 10 and FIG. 11 are block diagrams showing a configuration example of a communication apparatus used in a communication system according to another embodiment of the present invention. 9, FIG. 10 and FIG. 11 show an example in which the communication device 14 of the vehicle 1 performing inband communication shown as the second embodiment is developed in another form. 9, FIG. 10 and FIG. 11 show the first coil 145a that is electromagnetically coupled in the communication device 14 shown in FIG. 5 until it branches from the superposition separator 15 to the transmission side and the reception side. And a connection circuit 145 such as a transformer having the second coil 145b. Both ends of the first coil 145a are connected to the pair of communication lines 16 and 17, and both ends of the second coil 145b are connected to the communication circuit side.

　図９は、重畳分離器１５と、コモンモードチョークコイル１４０との間に接続回路１４５を介装する形態を示している。図１０は、コモンモードチョークコイル１４０と、送信側及び受信側に分岐する分岐点との間に接続回路１４５を介装する形態を示している。図１１は、コモンモードチョークコイル１４０を省いた形態を示している。図１１に示すように、コモンモードチョークコイル１４０を備えていない形態であっても、コモンモードノイズは、接続回路１４５にて減衰するため、通信異常の発生を防止することが可能である。　
FIG. 9 shows a mode in which a connection circuit 145 is interposed between the superposition separator 15 and the common mode choke coil 140. FIG. 10 shows a mode in which a connection circuit 145 is interposed between the common mode choke coil 140 and a branch point that branches to the transmission side and the reception side. FIG. 11 shows a form in which the common mode choke coil 140 is omitted. As shown in FIG. 11, even if the common mode choke coil 140 is not provided, the common mode noise is attenuated by the connection circuit 145, so that it is possible to prevent the occurrence of communication abnormality.

　なお、図９、図１０及び図１１に示す構成例は、電力線通信に適用するようにしても良く、また、給電装置２の通信部２２に適用するようにしても良い。
9, 10, and 11 may be applied to power line communication, or may be applied to the communication unit 22 of the power feeding device 2.

　１　車両
　１０　バッテリ（蓄電装置）
　１１　受電コネクタ
　１２　充電装置
　１３　充電制御装置
　１４　通信装置
　１４０　コモンモードチョークコイル
　１４１　送信保護回路
　１４２　ＡＦＥ回路
　１４３　バンドパスフィルタ
　１４４　受信保護回路
　１４５　接続回路（接続部）
　１４５ａ　第１コイル
　１４５ｂ　第２コイル
　１５　重畳分離器
　１６、１７　通信線
　１６ａ、１７ａ、１６ｂ、１７ｂ　分岐線
　２　給電装置（通信装置）
　２０　電力供給部
　２１　充電制御部
　２２　通信部（通信装置）
　２２０　コモンモードチョークコイル
　２２１　送信保護回路
　２２２　ＡＦＥ回路
　２２３　バンドパスフィルタ
　２２４　受信保護回路
　２２５　接続回路
　２２５ａ　第１コイル
　２２５ｂ　第２コイル
　２３　重畳分離部
　２４、２５　通信線
　２４ａ、２５ａ、２４ｂ、２５ｂ　分岐線
　３　充電ケーブル
　３１、３２　給電線
　３３　制御用線
　３４　接地線
1 vehicle 10 battery (power storage device)
DESCRIPTION OF SYMBOLS 11 Power receiving connector 12 Charging apparatus 13 Charging control apparatus 14 Communication apparatus 140 Common mode choke coil 141 Transmission protection circuit 142 AFE circuit 143 Band pass filter 144 Reception protection circuit 145 Connection circuit (connection part)
145a 1st coil 145b 2nd coil 15 Superimposition separator 16, 17 Communication line 16a, 17a, 16b, 17b Branch line 2 Feeding device (communication device)
20 power supply unit 21 charge control unit 22 communication unit (communication device)
220 Common Mode Choke Coil 221 Transmission Protection Circuit 222 AFE Circuit 223 Band Pass Filter 224 Reception Protection Circuit 225 Connection Circuit 225a First Coil 225b Second Coil 23 Superposition Separation Unit 24, 25 Communication Line 24a, 25a, 24b, 25b Branch Line 3 Charging cable 31, 32 Feed line 33 Control line 34 Ground line

Claims (5)

  1. 　給電に用いる一対の給電線に夫々接続する一対の通信線を介して通信する通信装置において、
    　前記一対の通信線を介した通信に係る処理を行う通信回路と、
    　前記一対の通信線及び通信回路を接続している接続部と
    　を備え、
    　該接続部は、
    　前記一対の通信線に両端が接続している第１コイルと、
    　該第１コイルに電磁的に結合する第２コイルと
    　を有し、
    　該第２コイルの両端は、前記通信回路に接続している
    　ことを特徴とする通信装置。     In a communication device that communicates via a pair of communication lines connected to a pair of power supply lines used for power supply,
    A communication circuit for performing processing related to communication via the pair of communication lines;
    A connection part connecting the pair of communication lines and the communication circuit,
    The connection is
    A first coil having both ends connected to the pair of communication lines;
    A second coil electromagnetically coupled to the first coil;
    Both ends of the second coil are connected to the communication circuit.
  2. 　給電制御に用いる制御信号を伝送する制御用線及び接地線に夫々接続する一対の通信線を介して通信する通信装置において、
    　前記一対の通信線を介した通信に係る処理を行う通信回路と、
    　前記一対の通信線及び通信回路を接続している接続部と
    　を備え、
    　該接続部は、
    　前記一対の通信線に両端が接続している第１コイルと、
    　該第１コイルに電磁的に結合する第２コイルと
    　を有し、
    　該第２コイルの両端は、前記通信回路に接続している
    　ことを特徴とする通信装置。     In a communication apparatus that communicates via a pair of communication lines connected to a control line and a ground line that transmit a control signal used for power supply control,
    A communication circuit for performing processing related to communication via the pair of communication lines;
    A connection part connecting the pair of communication lines and the communication circuit,
    The connection is
    A first coil having both ends connected to the pair of communication lines;
    A second coil electromagnetically coupled to the first coil;
    Both ends of the second coil are connected to the communication circuit.
  3. 　前記通信回路は、前記一対の通信線に夫々接続する送信側回路及び受信側回路を含み、
    　前記接続部は、前記一対の通信線及び前記受信側回路を接続している
    　ことを特徴とする請求項１又は２に記載の通信装置。     The communication circuit includes a transmission side circuit and a reception side circuit respectively connected to the pair of communication lines,
    The communication device according to claim 1, wherein the connection unit connects the pair of communication lines and the reception-side circuit.
  4. 　給電装置と、該給電装置から給電される蓄電装置を搭載し通信機能を有する車両と、を、給電に用いる一対の給電線にて接続し、該給電線を媒体として通信信号を送受信する通信システムにおいて、
    　前記給電装置及び車両の少なくとも一方は、
    　請求項１に記載の通信装置を備え、
    　該通信装置は、一対の通信線にて、前記一対の給電線に接続している
    　ことを特徴とする通信システム。     A communication system in which a power supply device and a vehicle having a communication function mounted with a power storage device fed from the power supply device are connected by a pair of power supply lines used for power supply, and a communication signal is transmitted and received using the power supply line as a medium. In
    At least one of the power feeding device and the vehicle is
    A communication device according to claim 1,
    The communication apparatus is connected to the pair of power supply lines by a pair of communication lines.
  5. 　給電装置と、該給電装置から給電される蓄電装置を搭載し通信機能を有する車両と、を、給電に用いる給電線、前記蓄電装置に対する給電制御に用いる制御信号を伝送する制御用線、及び接地線にて接続し、前記制御用線及び接地線を媒体として、前記制御信号と異なる通信信号を送受信する通信システムにおいて、
    　前記給電装置及び車両の少なくとも一方は、
    　請求項２に記載の通信装置を備え、
    　該通信装置は、一対の通信線にて、前記制御用線及び接地線に接続している
    　ことを特徴とする通信システム。     A power supply device and a vehicle equipped with a power storage device fed from the power supply device and having a communication function, a power supply line used for power supply, a control line for transmitting a control signal used for power supply control for the power storage device, and a ground In a communication system that connects with a wire and transmits / receives a communication signal different from the control signal using the control line and the ground line as a medium,
    At least one of the power feeding device and the vehicle is
    A communication device according to claim 2,
    The communication apparatus is connected to the control line and the ground line by a pair of communication lines.
PCT/JP2013/053507 2012-03-16 2013-02-14 Communication device and communication system WO2013136901A1 (en)

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