CN102734187B - Direct current fan and driving system thereof - Google Patents
Direct current fan and driving system thereof Download PDFInfo
- Publication number
- CN102734187B CN102734187B CN201110082546.2A CN201110082546A CN102734187B CN 102734187 B CN102734187 B CN 102734187B CN 201110082546 A CN201110082546 A CN 201110082546A CN 102734187 B CN102734187 B CN 102734187B
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- Prior art keywords
- motor
- vdc
- fan
- drive systems
- motor controller
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Abstract
The embodiment of the invention provides a fan that can directly receive a first direct current voltage. The fan comprises a motor, a vane, a voltage converting device, and a motor controller. The motor is directly driven by the first direct current voltage, the vane is connected with the motor and is driven to rotate by the motor, the voltage converting device is used for receiving the first direct current voltage and converting the first direct current voltage into a second direct current voltage, and the motor controller is used for receiving the second direct current voltage and controlling the motor.
Description
Technical field
The present invention is a kind of DC fan, particularly a kind of can directly with the DC fan of high voltage drive.
Background technique
It is not high that general DC fan can receive VDC, and the receivable VDC in large portion is 5V, 12V, 24V or 48V.And the voltage of general civil power is the alternating voltage of 110V to 220V mostly, therefore need to be used after civil power step-down to DC fan again by power supply unit.Please refer to Fig. 1.Fig. 1 is traditional DC fan and the schematic diagram of power supply unit.Power supply unit 11 receives alternating voltage V
acafter, one second VDC V can be exported
dcLto drive DC fan 12.Power supply unit 11 includes a power-supply filter (Electromagnetic Interference Filters, EMI filter) 13, one capability correction level (power factor correction stage, PFC stage) 14 and a DC/DC transducer 15.Power-supply filter 13, filters the noise of alternating voltage.Alternating voltage after filtration is converted to one first VDC V by capability correction level 14
dcH.Then, by DC/DC transducer 15 by the first VDC V
dcHbe converted to the second VDC V
dcL, wherein the second VDC V
dcLbe less than the first VDC V
dcH.
But such DC fan that easily causes operates in the situation of low voltage and high current, causes conduction loss.And power supply unit also can process voltage transitions and step-down time after cause power loss.Being no matter because the conduction loss that causes of the operation of low voltage and high current or the efficiency of current conversion, is all the waste caused on the energy.
Summary of the invention
The unnecessary power loss that object of the present invention causes for reducing DC fan.
For reaching above-mentioned one or part or all of object or other object, one embodiment of the invention provide a kind of fan that directly can receive one first VDC.This fan comprises a motor, a blade, a voltage conversion device and a motor controller.This motor, directly drive by this first VDC.This blade, connects this motor, and this blade rotates by motor drives.This voltage conversion device, receives this first VDC and is converted to one second VDC.This motor controller, receives this second VDC, controls this motor.Transformer in the present embodiment only provides this second VDC to the other electron component in this fan except this motor.
Another embodiment of the present invention provides a kind of fan drive system, comprises one first transformer and a fan.This fan drive system receives one first VDC and the size of this first VDC between 300 volts and 1000 volts.This fan comprises a motor, a blade, one second transformer and a motor controller.This motor, directly drive by this first VDC.This blade, connects this motor, and this blade rotates by motor drives.This first transformer, receives this first VDC and is converted to one second VDC.This motor controller, receives this second VDC, controls this motor.Transformer in the present embodiment only provides this second VDC to the other electron component in this fan except this motor.
Accompanying drawing explanation
Fig. 1 is traditional DC fan and the schematic diagram of power supply unit.
Fig. 2 is the schematic diagram of the embodiment according to a fan of the present invention.
Fig. 3 is the schematic diagram of the embodiment according to a transformer of the present invention.
Fig. 4 is the schematic diagram of another embodiment according to a transformer of the present invention.
Fig. 5 is the schematic diagram of another embodiment according to a transformer of the present invention.
Fig. 6 is the schematic diagram of another embodiment according to a fan of the present invention.
Fig. 7 is the schematic diagram of another embodiment according to a fan of the present invention.
Fig. 8 is the schematic diagram of the embodiment according to a fan drive system of the present invention.
[primary component label declaration]
11 ~ power supply unit, 12 ~ DC fan
13 ~ power-supply filter, 14 ~ capability correction level
15 ~ DC/DC transducer 20,60,70,80 ~ fan
21,61,81 ~ protective gear 22,68,30,40,50 ~ transformer
23,73,83 ~ bridge circuit 24,84 ~ motor
25,85 ~ motor control circuit 26,86 ~ position detector
31,41,51 ~ pwm control circuit 32,42,52 ~ voltage-sensor
53 ~ isolation coupler, 62 ~ controller
63 ~ gate leve controller, 64 ~ Hall element
65 ~ 3 phase brushless motor 66 ~ full bridge circuits
67 ~ comparator, 69 ~ voltage conversion device
601,71 ~ fuse, 72 ~ switch type current supply
74 ~ 3-phase brushless motor, 75 ~ microcontroller
76 ~ Hall element 87 ~ the first transformer
82 ~ the second transformers
Embodiment
Aforementioned and other technology contents, feature and effect for the present invention, in the detailed description of following cooperation with reference to a graphic preferred embodiment, can clearly present.
Fig. 2 is the schematic diagram of the embodiment according to a fan of the present invention.Fan 20 receives one first VDC V
dC, and by this first VDC V
dCdriven.Fan 20 comprises protective gear 21, transformer 22, bridge circuit 23, motor 24, motor control circuit 25 and a position detector 26.Motor 24 also connects a blade (figure does not draw), and this blade drives by motor 24 and rotates.Motor 24 in fan 20 can directly by this first VDC V
dCdriven, but motor control circuit 25 in fan and position detector 26 just cannot bear this first VDC V
dC.In the present embodiment, the first VDC V
dCsize between 300V to 1000V.Because the first VDC V
dCcannot directly be supplied to motor control circuit 25 and position detector 26 uses, therefore need to export one second VDC by transformer 22, wherein this first VDC is higher than this second VDC.Therefore also comprise transformer 22 in fan, receive this first VDC V
dCand export this second VDC according to the operating voltage of motor control circuit 25 and position detector 26.Transformer 22 also can provide different VDC according to the different circuit in fan 20 or element (may not draw on figure), and motor 24 just only directly receives the first VDC V of outside input
dCand operate.In the present embodiment, the size of this second VDC is less than 48 volts.
Embodiment in FIG, utilizes the first VDC Direct driver fan, can reduce known to low dc voltage drive fan 20 and motor 24, and the energy lost during voltage transitions.There is provided the operating voltage needed for fan 20 other multiple circuit interior or multiple element by a transformer more in addition, control fan 20 and motor 24 by these circuit or element.
First VDC V
dCfan 20 is input to by a positive input terminal (chart display+) and a negative input end (chart display-).Positive input terminal couples a protective gear 21, in order to protect the circuit in fan 20, avoids excessive VDC to burn the element of fan 20 inside.In the present embodiment, motor 24 is designed to bear 1000V VDC, but in fact motor 24 may can bear higher VDC, as 1200V.But be protection fan 20, therefore a protective gear 21 is set in fan 20, as VDC V
dCwhen being greater than 1000V, protective gear 21 will disconnect, and stops VDC V
dCinput fan 20.Protective gear 21 also can coordinate that the reality of motor 24 is maximum bears magnitude of voltage (1200V), is set the voltage flowing through protective gear 21 and is not more than 1200V.In other words, protective gear 21 may at VDC V
dCbe disconnected when dropping between 1000V to 1200V, and do not limit a specific voltage.In the present embodiment, this protective gear 21 is a fuse, TVS (Transient Voltage Suppresser, Transient Voltage Suppressor) diode or a thermistor.
The position of rotor in order to detect the position of the rotor in motor 24, and is converted to a position signal and sends motor controller 25 to by position detector 26.Motor controller 25 controls bridge circuit 23 according to this position signal, to control the sense of rotation of motor 24.In the present embodiment, motor 24 is a three-phase type brushless motor.Position detector 26 includes a Hall element (hall e1ement), and bridge circuit 23 is a full bridge circuit.In other embodiments, position detector 26 also can be realized by an optical encoder, or a sensor, in order to sense a winding voltage or a winding current of at least one rotor in motor.
Fig. 3 is the schematic diagram of the embodiment according to a transformer of the present invention.Transformer 30 is a step-down controller (BUCK converter).Voltage-sensor 32 can send the magnitude of voltage sensed to pulse duration modulation (pulse width modulation, hereinafter referred to as PWM) control circuit 31, by pwm control circuit 31 control switch SW1, makes transformer 30 export VDC V
dc.
Fig. 4 is the schematic diagram of another embodiment according to a transformer of the present invention.Transformer 40 is a direction flyback converter (Flyback Converter), and it has low cost, low circuit complexity and can have many group voltage and export, and therefore can be applied in fan of the present invention.Voltage-sensor 42 can send the magnitude of voltage sensed to pwm control circuit 41, by pwm control circuit 41 control switch SW2, makes transformer 40 export VDC V
dc.Transformer element in transformer 40 is as the energy trasfer of input end and output terminal and regulatory function, and rectifier is as the fault offset loop of transformer.
Fig. 5 is the schematic diagram of another embodiment according to a transformer of the present invention.Transformer 50 is a forward type change-over circuit (Forward Converter).Because the VDC of input is only by transformer, so use more small-sized transformer, is applicable to being applied to the device needing low output voltage and large output current, therefore can be applied in fan of the present invention.The magnitude of voltage sensed directly can be sent to pwm control circuit 51 or send pwm control circuit 51 to by isolation coupler (isolation coupler) 53 by voltage-sensor 52, again by pwm control circuit 51 control switch SW2, transformer 50 is made to export VDC V
dc.Transformer element in transformer 50 is as the energy trasfer of input end and output terminal and regulatory function, and rectifier is as the fault offset loop of transformer.
Fig. 6 is the schematic diagram of another embodiment according to a fan of the present invention.Fan 60 comprises protective gear 61, controller 62, gate leve controller 63, Hall element 64,3 phase brushless motor 65, full bridge circuit 66 and voltage conversion device 69.Protective gear 61 comprises fuse 601 and diode D1, in order to protect the circuit in fan 60, avoids excessive VDC or electric current to burn the element of fan 60 inside.Fuse 601 can bear a predetermined direct current voltage, and when this VDC is greater than this predetermined direct current voltage, fuse 601 is burnt, and makes VDC can not be sent to full bridge circuit in fan 60 66 and voltage conversion device 69.The size of this predetermined direct current voltage determined according to the maximum VDC of bearing of full bridge circuit 66 with 3 phase brushless motors 65.
Voltage conversion device 69 receives VDC Va and exports VDC V1 and uses to controller 62.Comparator 67 can compare the voltage Vc that the voltage Vb of Input transformer 68 and transformer 68 export, and according to the closedown of comparative result control switch S1 or conducting.The position of rotor in order to detect the position of the rotor in 3 phase brushless motors 65, and is converted to a position signal and sends controller 62 to by Hall element 64.Controller 62 then produces a control signal and transmits lock and controller 63 to control full bridge circuit 66.Full bridge circuit 66 is in order to control the sense of rotation of 3 phase brushless motors 65.In other embodiments, full bridge circuit 66 also can replace by half bridge circuit.
Fig. 7 is the schematic diagram of another embodiment according to a fan of the present invention.Fan 70 receives one first VDC V
dC, and by this first VDC V
dCdriven.Fan 70 comprises fuse 71, switch type current supply 72, bridge circuit 73,3-phase brushless motor 74, microcontroller 75 and a Hall element 76.3-phase brushless motor 74 in fan 70 can directly by this first VDC V
dCdriven, but microcontroller 75 in fan and Hall element 76 just cannot bear the first VDC V
dC.In the present embodiment, the first VDC V
dCsize between 300V to 1000V, cannot directly be supplied to microcontroller 75 and Hall element 76 uses.Therefore comprise switch type current supply 72 in fan, receive this first VDC V
dCand export one second VDC according to the operating voltage of microcontroller 75 and Hall element 76.Switch type current supply 72 also can provide different VDC according to the different circuit in fan 70 or element (may not draw on figure), and 3-phase brushless motor 74 just only directly receives the first VDC V of outside input
dCand operate.The position of three rotors in order to detect the position of three rotors in 3-phase brushless motor 74, and is converted to a position signal and sends microcontroller 75 to by Hall element 76.Microcontroller 75 controls bridge circuit 73 according to this position signal, to control the sense of rotation of 3-phase brushless motor 74.
First VDC V
dCfan 70 is input to by a positive input terminal (chart display+) and a negative input end (chart display-).Positive input terminal couples a fuse 71, in order to protect the circuit in fan 70, avoids excessive VDC to burn the element of fan 70 inside.In the present embodiment, 3-phase brushless motor 74 is designed to bear 1000V VDC, but in fact 3-phase brushless motor 74 may can bear higher VDC, as 1200V.But be protection fan 70, therefore a fuse 71 is set in fan 70, as the first VDC V
dCwhen being greater than 1000V, fuse 71 will disconnect, and makes the first VDC V
dCcannot continue to be input to fan 70.Fuse 71 also can coordinate that the reality of 3-phase brushless motor 74 is maximum bears magnitude of voltage (1200V), is set the voltage flowing through fuse 71 and is not more than 1200V.In other words, fuse 71 may at the first VDC V
dCbe disconnected when dropping between 1000V to 1200V, and do not limit a specific voltage.
Fig. 8 is the schematic diagram of the embodiment according to a fan drive system of the present invention.Fan drive system comprises one first transformer 87 and fan 80, and wherein the first transformer 87 provides one first VDC V
dCto fan 80.Fan 80 receives one first VDC V
dC, and by this first VDC V
dCdriven.Fan 80 comprises protective gear 81,1 second transformer 82, bridge circuit 83, motor 84, motor control circuit 85 and a position detector 86.Motor 84 in fan 80 can directly by this VDC V
dCdriven, but motor control circuit 85 in fan and position detector 86 just cannot bear the first VDC V
dC.In the present embodiment, the first VDC V
dCsize between 300V to 1000V, cannot directly be supplied to motor control circuit 85 and position detector 86 uses.Therefore comprise the second transformer 82 in fan, receive this first VDC V
dCand export one second VDC according to the operating voltage of motor control circuit 85 and position detector 86.Second transformer 82 also can provide different VDC according to the different circuit in fan 80 or element (may not draw on figure), and motor 84 just only directly receives the first VDC V of outside input
dCand operate.
First VDC V
dCfan 80 is input to by a positive input terminal (chart display+) and a negative input end (chart display-).Positive input terminal couples a protective gear 81, in order to protect the circuit in fan 80, avoids excessive VDC to burn the element of fan 80 inside.In the present embodiment, motor 84 is designed to bear 1000V VDC, but in fact motor 84 may can bear higher VDC, as 1200V.But be protection fan 80, therefore a protective gear 81 is set in fan 80, as the first VDC V
dCwhen being greater than 1000V, protective gear 81 will disconnect, and makes the first VDC V
dCfan 80 cannot be input to.Protective gear 81 also can coordinate that the reality of motor 84 is maximum bears magnitude of voltage (1200V), is set the voltage flowing through protective gear 81 and is not more than 1200V.In other words, protective gear 81 may at the first VDC V
dCbe disconnected when dropping between 1000V to 1200V, and do not limit a specific voltage.
The position of rotor in order to detect the position of the rotor in motor 84, and is converted to a position signal and sends motor controller 85 to by position detector 86.Motor controller 85 controls bridge circuit 83 according to this position signal, to control the sense of rotation of motor 84.In the present embodiment, motor 84 is a three-phase type brushless motor, and position detector 86 includes a Hall element (hall element), and bridge circuit 83 is a full bridge circuit.
Only as described above, be only preferred embodiment of the present invention, when scope of the invention process can not be limited with this, the simple equivalence change namely generally done according to the claims in the present invention scope and invention description content with modify, all still belong in scope that the claims in the present invention contain.Any embodiment of the present invention or right must not reach whole object disclosed by the present invention or advantage or feature in addition.In addition, summary part and title are only used to the use of auxiliary patent document search, are not used for limiting right of the present invention.
Claims (20)
1. a fan, receive one first VDC, this fan comprises:
One motor, drive by this first VDC;
One blade, connects this motor, and this blade rotates by motor drives;
One voltage conversion device, receive this first VDC and be converted to one second VDC, wherein this first VDC is higher than this second VDC; And
One motor controller, receives this second VDC, controls this motor.
2. fan according to claim 1, wherein this first VDC is greater than 300 volts.
3. fan according to claim 1, wherein this first VDC is between 300 volts and 1000 volts.
4. fan according to claim 1, wherein this motor is a 3-phase brushless motor.
5. fan according to claim 1, also comprises a position detector, detects multiple positions of multiple rotor in this motor, and a position signal of these positions of transmission these rotors corresponding is to motor controller.
6. fan according to claim 5, wherein this position detector comprises a Hall element.
7. fan according to claim 1, also comprises a bridge circuit, is controlled by this motor controller, to control the sense of rotation of this motor.
8. fan according to claim 1; wherein this fan has positive input terminal and negative input end; receive this first VDC; and also comprise a protective gear; be coupled between this positive input terminal and this motor; when this first VDC is greater than a predetermined voltage, this protective gear disconnects to protect this motor.
9. fan according to claim 8, wherein this protective gear is a fuse, transient voltage suppressor or a thermistor.
10. fan according to claim 1, also comprises:
One position detector, detects multiple positions of multiple rotor in this motor, and a position signal of these positions of transmission these rotors corresponding is to motor controller;
One bridge circuit, to control the sense of rotation of this motor; And
One gate level circuit, be controlled by this motor controller to control this bridge circuit, this motor controller controls this gate level circuit according to this position signal.
11. 1 kinds of fan drive systems, comprising:
One first transformer, provides one first VDC; And
One fan, comprising:
One motor, directly receives this first VDC;
One blade, connects this motor, and this blade rotates by motor drives;
One second transformer, receive this first VDC and be converted to one second VDC, wherein this first VDC is higher than this second VDC; And
One motor controller, receives this second VDC, controls this motor.
12. fan drive systems according to claim 11, wherein, wherein this first VDC is greater than 300 volts.
13. fan drive systems according to claim 11, wherein this first VDC is between 300 volts and 1000 volts.
14. fan drive systems according to claim 11, wherein this motor is 3-phase brushless motor.
15. fan drive systems according to claim 11, this fan also comprises a position detector, detects multiple positions of multiple rotor in this motor, and a position signal of these positions of transmission these rotors corresponding is to motor controller.
16. fan drive systems according to claim 15, wherein this position detector comprises a Hall element.
17. fan drive systems according to claim 11, this fan also comprises a bridge circuit, is controlled by this motor controller, to control the sense of rotation of this motor.
18. fan drive systems according to claim 11; wherein this fan has a positive input terminal and a negative input end; receive this first VDC; and also comprise a protective gear; be coupled between this positive input terminal and this motor; when this first VDC is greater than a predetermined voltage, this protective gear disconnects to protect this motor.
19. fan drive systems according to claim 18, wherein this protective gear is a fuse, transient voltage suppressor or a thermistor.
20. fan drive systems according to claim 11, this fan also comprises:
One position detector, detects multiple positions of multiple rotor in this motor, and a position signal of these positions of transmission these rotors corresponding is to motor controller;
One bridge circuit, to control the sense of rotation of this motor; And
One gate level circuit, be controlled by this motor controller to control this bridge circuit, this motor controller controls this gate level circuit according to this position signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110082546.2A CN102734187B (en) | 2011-04-01 | 2011-04-01 | Direct current fan and driving system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110082546.2A CN102734187B (en) | 2011-04-01 | 2011-04-01 | Direct current fan and driving system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102734187A CN102734187A (en) | 2012-10-17 |
| CN102734187B true CN102734187B (en) | 2015-01-07 |
Family
ID=46990277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110082546.2A Ceased CN102734187B (en) | 2011-04-01 | 2011-04-01 | Direct current fan and driving system thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN102734187B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099289A (en) * | 2015-09-23 | 2015-11-25 | 广东威灵电机制造有限公司 | Brushless direct current motor and driving control circuit thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3783357A (en) * | 1970-11-14 | 1974-01-01 | Canon Kk | Constant speed controlling device for a direct current motor |
| US6949899B2 (en) * | 2003-07-22 | 2005-09-27 | Sunonwealth Electric Machine Industry Co., Ltd. | Brushless DC motor having an AC power control device |
| CN2777848Y (en) * | 2005-02-18 | 2006-05-03 | 协禧电机股份有限公司 | AC electric machine driving circuit |
| US7262568B2 (en) * | 2003-10-09 | 2007-08-28 | Matsushita Electric Industrial Co., Ltd. | Brushless DC motor coupled directly to AC source and electric apparatus using the same motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06103998B2 (en) * | 1989-10-25 | 1994-12-14 | 株式会社三協精機製作所 | Brushless motor drive circuit |
-
2011
- 2011-04-01 CN CN201110082546.2A patent/CN102734187B/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3783357A (en) * | 1970-11-14 | 1974-01-01 | Canon Kk | Constant speed controlling device for a direct current motor |
| US6949899B2 (en) * | 2003-07-22 | 2005-09-27 | Sunonwealth Electric Machine Industry Co., Ltd. | Brushless DC motor having an AC power control device |
| US7262568B2 (en) * | 2003-10-09 | 2007-08-28 | Matsushita Electric Industrial Co., Ltd. | Brushless DC motor coupled directly to AC source and electric apparatus using the same motor |
| CN2777848Y (en) * | 2005-02-18 | 2006-05-03 | 协禧电机股份有限公司 | AC electric machine driving circuit |
Non-Patent Citations (1)
| Title |
|---|
| JP平3-143291A 1991.06.18 * |
Also Published As
| Publication number | Publication date |
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| CN102734187A (en) | 2012-10-17 |
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