CA2626087C - Power supply for 2-line dimmer - Google Patents
Power supply for 2-line dimmer Download PDFInfo
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- CA2626087C CA2626087C CA2626087A CA2626087A CA2626087C CA 2626087 C CA2626087 C CA 2626087C CA 2626087 A CA2626087 A CA 2626087A CA 2626087 A CA2626087 A CA 2626087A CA 2626087 C CA2626087 C CA 2626087C
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- power supply
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/04—Dimming circuit for fluorescent lamps
Abstract
A power supply circuit for a dimmer switching device includes a voltage doubler circuit, a filter circuit, a switching power supply, and a linear regulator circuit. In one embodiment, the voltage doubler circuit includes a first stage having a first capacitor and a first diode, and a second stage having a second capacitor and a second diode. The switching power supply may include a feedback circuit, and may be a non-isolated power supply. In an embodiment, the dimmer device is variable between an OFF position and a full ON position, and the circuit is effective to provide power for operation of the switching power supply while the dimmer device is in the full ON position.
Description
FIELD OF THE INVENTION
The present invention relates generally to power supplies utilized in lighting control applications and, more specifically, to power supplies used to power internal dimmer circuits.
The present invention relates generally to power supplies utilized in lighting control applications and, more specifically, to power supplies used to power internal dimmer circuits.
BACKGROUND OF THE INVENTION
A common application for a two wire connection circuit is to power the internal control of a dimmer. Conventional power supplies for two line dimmers are often based on a linear analog approach, including different capacitor charging schemes with a linear post regulator. Examples of power supplies utilizing this approach are shown in U.S.
Patents Nos. 4,334,184; 4,504,778; 4,678,985; and 5,600,552. These designs have a number of drawbacks, including bulky components and inefficiency, as they can draw current while the device is in its OFF state. These power supplies also sometimes have high implementation costs.
A switching power supply can avoid the above-noted problems. A switch mode power supply regulates by switching a transistor between saturation (fully on) and cutoff (fully oft). When the transistor turns on, energy is delivered to an inductor, and in some cases to the output capacitor and load. When the transistor turns off; the stored energy in the inductor is delivered to an output filter capacitor and a load. The transistor is operating either at full current and minimum voltage, or at full voltage and minimum current, which results in little wasted power. Efficiencies of switch mode power supplies are typically in the range of 80% to 95%, and in some instances even higher.
Switching frequencies may range from 25 kHz to over 1 MHz, with 100 kHz to 400 KHz being a typical range. In an off line switch mode power supply (AC mains at 50 Hz or 60 Hz), a transformer which is sometimes needed for isolation operates with a core flux in the frequency range noted above, which is very much higher than 50 or 60 Hz. This results in a core which is much smaller and lighter compared to a conventional power supply.
Also, since much less heat is generated due to high efficiency, smaller parts and smaller heat sinks can be used; in some power supplies the PC board alone can act as a sufficient heat sink.
Another advantage of a switch mode power supply is that the input voltage need not be higher than the output voltage. While a linear regulator can only step down, a switch mode power supply can step up or down and can have a negative output voltage.
Furthermore, a linear regulator can neither boost nor switch polarity.
A common application for a two wire connection circuit is to power the internal control of a dimmer. Conventional power supplies for two line dimmers are often based on a linear analog approach, including different capacitor charging schemes with a linear post regulator. Examples of power supplies utilizing this approach are shown in U.S.
Patents Nos. 4,334,184; 4,504,778; 4,678,985; and 5,600,552. These designs have a number of drawbacks, including bulky components and inefficiency, as they can draw current while the device is in its OFF state. These power supplies also sometimes have high implementation costs.
A switching power supply can avoid the above-noted problems. A switch mode power supply regulates by switching a transistor between saturation (fully on) and cutoff (fully oft). When the transistor turns on, energy is delivered to an inductor, and in some cases to the output capacitor and load. When the transistor turns off; the stored energy in the inductor is delivered to an output filter capacitor and a load. The transistor is operating either at full current and minimum voltage, or at full voltage and minimum current, which results in little wasted power. Efficiencies of switch mode power supplies are typically in the range of 80% to 95%, and in some instances even higher.
Switching frequencies may range from 25 kHz to over 1 MHz, with 100 kHz to 400 KHz being a typical range. In an off line switch mode power supply (AC mains at 50 Hz or 60 Hz), a transformer which is sometimes needed for isolation operates with a core flux in the frequency range noted above, which is very much higher than 50 or 60 Hz. This results in a core which is much smaller and lighter compared to a conventional power supply.
Also, since much less heat is generated due to high efficiency, smaller parts and smaller heat sinks can be used; in some power supplies the PC board alone can act as a sufficient heat sink.
Another advantage of a switch mode power supply is that the input voltage need not be higher than the output voltage. While a linear regulator can only step down, a switch mode power supply can step up or down and can have a negative output voltage.
Furthermore, a linear regulator can neither boost nor switch polarity.
A block diagram of a typical dimmer using a switching device is shown in Figure I. When used to power dimmer internal circuits 19, the switching device 15 of the dimmer is connected between the line terminal 11 and a load 16, and the neutral terminal 12 is connected to the other side of the load as shown in Figure 1.
The power supply 18 for a dimmer is typically connected across the switching device terminals. The deign of this type of power supply can be a problem because the available AC power source will normally depend on the status of the load. For example, when the dimmer is at its full ON position the AC input can be utilized only for a short time period close to the zero crossing; this limits the amount of power available for the circuit power supply 18. Figure 2 represents an example of a dimmer AC
waveform 20 where the switching device 15 includes a triac as a switching element. Time periods 22 (T1 to T2, etc.) represent the time that the load is on. Time periods 21 (TO
to Ti, T2 to T3, etc.) represent the time that the load is off, during which AC line power is available to power the dimmer's power supply.
The minimum operating voltage represents a restriction on the switching device of the switch mode power supply which may be critical for lighting applications.
As shown in Figure 2, when the AC input power can be utilized only during short intervals of time around the zero crossing, peak voltage levels which develop while the load is OFF can be marginal for switching operation or may not provide enough energy for the required power output. Switching power supplies therefore may not be suitable for use in lighting applications, which normally require unobstructed line access and input voltage values which are not too low for the switching power supply to operate properly. A
similar problem may arise in home energy management systems, in which the power switching device is placed in series with a 24V or 1.20V power source and a load (as discussed in U.S. Patent No. 4,678,985).
The power supply 18 for a dimmer is typically connected across the switching device terminals. The deign of this type of power supply can be a problem because the available AC power source will normally depend on the status of the load. For example, when the dimmer is at its full ON position the AC input can be utilized only for a short time period close to the zero crossing; this limits the amount of power available for the circuit power supply 18. Figure 2 represents an example of a dimmer AC
waveform 20 where the switching device 15 includes a triac as a switching element. Time periods 22 (T1 to T2, etc.) represent the time that the load is on. Time periods 21 (TO
to Ti, T2 to T3, etc.) represent the time that the load is off, during which AC line power is available to power the dimmer's power supply.
The minimum operating voltage represents a restriction on the switching device of the switch mode power supply which may be critical for lighting applications.
As shown in Figure 2, when the AC input power can be utilized only during short intervals of time around the zero crossing, peak voltage levels which develop while the load is OFF can be marginal for switching operation or may not provide enough energy for the required power output. Switching power supplies therefore may not be suitable for use in lighting applications, which normally require unobstructed line access and input voltage values which are not too low for the switching power supply to operate properly. A
similar problem may arise in home energy management systems, in which the power switching device is placed in series with a 24V or 1.20V power source and a load (as discussed in U.S. Patent No. 4,678,985).
SUMMARY OF THE INVENTION
The present invention addresses the above-noted problems by providing a switching power supply circuit in which the input voltage level is increased, thereby improving the performance of the switching power supply. A voltage multiplier such as a voltage doubler circuit is introduced between the load switching device and the input to the switching power supply. The voltage multiplier permits stable operation of the power supply even at low voltages.
According to an aspect of the invention, a power supply circuit for providing power to internal circuits of a lighting dimmer device is adapted to be connected to a source of potential; the power supply circuit includes a voltage multiplier, a switching power supply, and a linear post regulator. The voltage multiplier is adapted to be coupled to the source of potential to provide an output signal of at least double the source of potential; the switching power supply is coupled to the voltage multiplier to receive the multiplied voltage as an input. The linear post regulator is interposed between the switching power supply and the internal circuits of the dimmer device.
According to another aspect of the invention, a power supply circuit for connection to a lighting dimmer device is provided which includes a voltage doubler circuit, a filter circuit, a switching power supply, and a linear regulator circuit. In one embodiment, the voltage doubler circuit includes a first stage having a first capacitor and a first diode, and a second stage having a second capacitor and a second diode. The switching power supply may include a feedback circuit, and may be a non-isolated power supply. In an embodiment, the dimmer device is variable between an OFF
position and a full ON position, and the circuit is effective to provide power for operation of the switching power supply while the dimmer device is in the full ON position.
The present invention addresses the above-noted problems by providing a switching power supply circuit in which the input voltage level is increased, thereby improving the performance of the switching power supply. A voltage multiplier such as a voltage doubler circuit is introduced between the load switching device and the input to the switching power supply. The voltage multiplier permits stable operation of the power supply even at low voltages.
According to an aspect of the invention, a power supply circuit for providing power to internal circuits of a lighting dimmer device is adapted to be connected to a source of potential; the power supply circuit includes a voltage multiplier, a switching power supply, and a linear post regulator. The voltage multiplier is adapted to be coupled to the source of potential to provide an output signal of at least double the source of potential; the switching power supply is coupled to the voltage multiplier to receive the multiplied voltage as an input. The linear post regulator is interposed between the switching power supply and the internal circuits of the dimmer device.
According to another aspect of the invention, a power supply circuit for connection to a lighting dimmer device is provided which includes a voltage doubler circuit, a filter circuit, a switching power supply, and a linear regulator circuit. In one embodiment, the voltage doubler circuit includes a first stage having a first capacitor and a first diode, and a second stage having a second capacitor and a second diode. The switching power supply may include a feedback circuit, and may be a non-isolated power supply. In an embodiment, the dimmer device is variable between an OFF
position and a full ON position, and the circuit is effective to provide power for operation of the switching power supply while the dimmer device is in the full ON position.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram of a conventional arrangement for powering a dimmer circuit.
Figure 2 shows an AC waveform in a dimmer circuit with a triac switching element.
Figure 3 is a block diagram of a switching power supply circuit in accordance with an embodiment of the invention.
Figure 4 is a circuit diagram for a power supply circuit in accordance with an embodiment of the invention, DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 3 shows a block diagram of a switching power supply 30 according to an embodiment of the invention, hi this embodiment, a voltage multiplier such as a voltage doubler is used to increase the input voltage level of the power supply, thereby assuring proper operation of the power supply even when the dimmer is at its full ON
position. A
voltage doubler circuit 31 is connected between the switching device 15 and the input to the switching power supply 38. This arrangement permits direct access to the line terminal 11 for various components of the dimmer providing other optional dimmer functions such as communication to remote devices. Other voltage multiplication circuits besides voltage doublers (e.g. 3X) may also be used. A linear post regulator 32 may be advantageously placed between the output of power supply 38 and the dimmer internal circuits 19. Noise sensitive dimmer circuits may particularly benefit from an additional linear post regulator.
Referring to Figure 4, there is shown a circuit diagram for a circuit 40 realizing the block diagram of Figure 3. Circuit 40 includes a metal-oxide varistor MOV1 for surge protection, a fusible resistor R1 providing overcurrent protection, voltage doubler 31, and an LC filter upstream of the switching power supply 38. Diode D1 and capacitor Cl represent the first stage of the voltage doubler. During the positive half of the AC
cycle (line voltage high and neutral voltage low, e.g. TO to T2 as shown in Figure 2), diode D1 conducts and charges capacitor Cl. During the negative half of the AC
cycle, the DC voltage stored on capacitor Cl is added to the AC component and applied to capacitor C2 through the diode D2. During the negative half of the AC cycle (e.g. T2 to T4 in Figure 2) the diode D1 is off. The resulting voltage is filtered by the LC filter comprising inductor Li and capacitor C3. The output of the LC filter is fed to the input of power switcher Ul, based in this particular embodiment on a LinkSwitch -TN
device from Power Integrations, Inc. Diode D3, inductor L2 and capacitor C4 realize a buck converter scheme, familiar to those skilled in the art, with diode D4 and resistor-capacitor feedback network U2 providing feedback to the power switcher Ul. The output 17 of the power supply is fed into regulator 32 before being applied to the dimmer circuits 19.
Regulator 32 includes linear voltage regulator VR1 and output capacitor C5.
-In this embodiment, power supply 38 is a non-isolated switching power supply with feedback determining the output voltage. It will be appreciated that an isolated power supply may also be used. In addition, the input of circuit 40 may be connected to an AC source other than AC mains power having line and neutral terminals as shown in Figure 4.
For example, the input may be provided by a transformer, AC divider, filter or other circuit.
While the invention has been described in terms of specific embodiments, it is evident in view of the foregoing description that numerous alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the invention is intended to encompass all such alternatives, modifications and variations which fall within the scope of the invention and the following claims.
I claim:
Figure 1 is a block diagram of a conventional arrangement for powering a dimmer circuit.
Figure 2 shows an AC waveform in a dimmer circuit with a triac switching element.
Figure 3 is a block diagram of a switching power supply circuit in accordance with an embodiment of the invention.
Figure 4 is a circuit diagram for a power supply circuit in accordance with an embodiment of the invention, DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Figure 3 shows a block diagram of a switching power supply 30 according to an embodiment of the invention, hi this embodiment, a voltage multiplier such as a voltage doubler is used to increase the input voltage level of the power supply, thereby assuring proper operation of the power supply even when the dimmer is at its full ON
position. A
voltage doubler circuit 31 is connected between the switching device 15 and the input to the switching power supply 38. This arrangement permits direct access to the line terminal 11 for various components of the dimmer providing other optional dimmer functions such as communication to remote devices. Other voltage multiplication circuits besides voltage doublers (e.g. 3X) may also be used. A linear post regulator 32 may be advantageously placed between the output of power supply 38 and the dimmer internal circuits 19. Noise sensitive dimmer circuits may particularly benefit from an additional linear post regulator.
Referring to Figure 4, there is shown a circuit diagram for a circuit 40 realizing the block diagram of Figure 3. Circuit 40 includes a metal-oxide varistor MOV1 for surge protection, a fusible resistor R1 providing overcurrent protection, voltage doubler 31, and an LC filter upstream of the switching power supply 38. Diode D1 and capacitor Cl represent the first stage of the voltage doubler. During the positive half of the AC
cycle (line voltage high and neutral voltage low, e.g. TO to T2 as shown in Figure 2), diode D1 conducts and charges capacitor Cl. During the negative half of the AC
cycle, the DC voltage stored on capacitor Cl is added to the AC component and applied to capacitor C2 through the diode D2. During the negative half of the AC cycle (e.g. T2 to T4 in Figure 2) the diode D1 is off. The resulting voltage is filtered by the LC filter comprising inductor Li and capacitor C3. The output of the LC filter is fed to the input of power switcher Ul, based in this particular embodiment on a LinkSwitch -TN
device from Power Integrations, Inc. Diode D3, inductor L2 and capacitor C4 realize a buck converter scheme, familiar to those skilled in the art, with diode D4 and resistor-capacitor feedback network U2 providing feedback to the power switcher Ul. The output 17 of the power supply is fed into regulator 32 before being applied to the dimmer circuits 19.
Regulator 32 includes linear voltage regulator VR1 and output capacitor C5.
-In this embodiment, power supply 38 is a non-isolated switching power supply with feedback determining the output voltage. It will be appreciated that an isolated power supply may also be used. In addition, the input of circuit 40 may be connected to an AC source other than AC mains power having line and neutral terminals as shown in Figure 4.
For example, the input may be provided by a transformer, AC divider, filter or other circuit.
While the invention has been described in terms of specific embodiments, it is evident in view of the foregoing description that numerous alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the invention is intended to encompass all such alternatives, modifications and variations which fall within the scope of the invention and the following claims.
I claim:
Claims (34)
1. A power supply circuit for providing power to internal circuits of a lighting dimmer device adapted to be connected to a source of AC potential, comprising:
a switching device having a line connection terminal adapted to connect to said source of AC potential and a load connection terminal adapted to connect to a load, wherein during an ON state said switching device conducts said source of AC potential through said load and during an OFF state said switching device impedes said source of AC potential from conducting through said load;
a voltage multiplier adapted to be coupled to said source of AC potential and to said load connection terminal to provide an output signal, wherein said voltage multiplier charges said output signal during said OFF state of said switching device to about at least twice a peak voltage of said source of AC
potential during when said switching device is in said OFF state;
a switching power supply coupled to said voltage multiplier to receive, as an input potential, said output signal from said voltage multiplier; and a linear post regulator interposed between said switching power supply and said internal circuits.
a switching device having a line connection terminal adapted to connect to said source of AC potential and a load connection terminal adapted to connect to a load, wherein during an ON state said switching device conducts said source of AC potential through said load and during an OFF state said switching device impedes said source of AC potential from conducting through said load;
a voltage multiplier adapted to be coupled to said source of AC potential and to said load connection terminal to provide an output signal, wherein said voltage multiplier charges said output signal during said OFF state of said switching device to about at least twice a peak voltage of said source of AC
potential during when said switching device is in said OFF state;
a switching power supply coupled to said voltage multiplier to receive, as an input potential, said output signal from said voltage multiplier; and a linear post regulator interposed between said switching power supply and said internal circuits.
2. The power supply circuit according to claim 1, wherein the voltage multiplier is a voltage doubler.
3. The power supply circuit according to claim 1, wherein the switching power supply is a non-isolated power supply.
4. The power supply circuit according to claim 1, wherein the switching power supply includes a feedback circuit.
5. The power supply circuit according to claim 1, further comprising a filter circuit interposed between the voltage multiplier and the switching power supply.
6. The power supply circuit according to claim 1, wherein said source of AC
potential includes a line terminal, said line terminal being accessible for direct connection to components of the dimmer device.
potential includes a line terminal, said line terminal being accessible for direct connection to components of the dimmer device.
7. The power supply circuit according to claim 1, wherein said source of AC
potential is from one of AC mains power, a transformer, an AC divider, and a filter.
potential is from one of AC mains power, a transformer, an AC divider, and a filter.
8. The power supply circuit according to claim 1, wherein the voltage multiplier is a voltage tripler.
9. The power supply circuit according to claim 1, wherein said load terminal being accessible for direct connection to components of the dimmer device.
10. The power supply circuit according to claim 1, wherein said source of AC
potential represents a train of pulses and the switching power supply is utilized to power devices other than dimmers connected to said source.
potential represents a train of pulses and the switching power supply is utilized to power devices other than dimmers connected to said source.
11. The power supply circuit according to claim 1, wherein said source of AC
potential includes a zero-crossing point at time T0 and a time T1 occurs temporally after said zero-crossing point, wherein said voltage multiplier charges said output signal from about time T0 to at least about time T1.
potential includes a zero-crossing point at time T0 and a time T1 occurs temporally after said zero-crossing point, wherein said voltage multiplier charges said output signal from about time T0 to at least about time T1.
12. The power supply circuit according to claim 11, wherein said time T1 occurs about when said switching device transitions from said OFF state to said ON
state.
state.
13. The power supply circuit according to claim 1, wherein said switching device is in said OFF state for at least one cycle of said source of AC potential thereby said voltage multiplier charges said output signal during said at least one cycle of said source of AC potential to the about at least twice the peak voltage of said source of AC potential.
14. The power supply circuit according to claim 1, wherein the voltage multiplier is one selected from the group consisting of a capacitor-diode network and a transformer.
15. The power supply circuit according to claim 14, wherein the voltage multiplier is a half-wave series multiplier.
16. The power supply circuit according to claim 1, wherein said switching device is configured to operate to maximize said conduction of said source of AC
potential through said load throughout at least one cycle of said source of AC
potential and, said source of AC potential includes a zero-crossing point at time T0, wherein said switching device is configured to transition from said OFF
state to said ON state at a time T1 after a predetermined amount of time after said time T0 and said voltage multiplier drives said output signal substantially throughout said predetermined amount of time.
potential through said load throughout at least one cycle of said source of AC
potential and, said source of AC potential includes a zero-crossing point at time T0, wherein said switching device is configured to transition from said OFF
state to said ON state at a time T1 after a predetermined amount of time after said time T0 and said voltage multiplier drives said output signal substantially throughout said predetermined amount of time.
17. The power supply circuit according to claim 16, wherein said about at least twice said peak voltage of said source of AC potential during when said switching device is in said OFF state is about at least twice a voltage of said source of AC potential at said time T1 whereby said output signal is charged by said voltage multiplier to said at least twice said voltage of said source of AC
potential at said time T1.
potential at said time T1.
18. The power supply circuit according to claim 16, wherein said time T1 occurs about when said source of AC potential is a minimum working voltage of said switching device, wherein said voltage multiplier is adapted to charge said output signal to at least twice a voltage of said source of AC potential at said time T1.
19. A power supply circuit for connection to a lighting dimmer device, comprising:
a switching device having a line connection terminal adapted to connect to a source of AC potential and a load connection terminal adapted to connect to a load, wherein during an ON state said switching device conducts said source of AC potential through said load and during an OFF state said switching device impedes said source of AC potential from conducting through said load;
a voltage doubler circuit adapted to be coupled to said source of AC potential and to said load connection terminal to provide an output signal, wherein said voltage doubler charges said output signal during said OFF state of said switching device to about twice a peak voltage of said source of AC potential during when said switching device is in said OFF state;
a filter circuit connected to the voltage doubler circuit and adapted to receive said output signal;
a switching power supply connected to the filter circuit; and a linear regulator circuit connected to the switching power supply and coupled to an internal circuit of said dimmer device.
a switching device having a line connection terminal adapted to connect to a source of AC potential and a load connection terminal adapted to connect to a load, wherein during an ON state said switching device conducts said source of AC potential through said load and during an OFF state said switching device impedes said source of AC potential from conducting through said load;
a voltage doubler circuit adapted to be coupled to said source of AC potential and to said load connection terminal to provide an output signal, wherein said voltage doubler charges said output signal during said OFF state of said switching device to about twice a peak voltage of said source of AC potential during when said switching device is in said OFF state;
a filter circuit connected to the voltage doubler circuit and adapted to receive said output signal;
a switching power supply connected to the filter circuit; and a linear regulator circuit connected to the switching power supply and coupled to an internal circuit of said dimmer device.
20. The power supply circuit according to claim 19, wherein the voltage doubler circuit includes a first stage having a first capacitor and a first diode, and a second stage having a second capacitor and a second diode.
21. The power supply circuit according to claim 19, wherein the filter circuit includes an inductor and a capacitor.
22. The power supply circuit according to claim 19, wherein the switching power supply includes a feedback circuit.
23. The power supply circuit according to claim 19, wherein the switching device includes a FET.
24. The power supply circuit according to claim 19, wherein the switching device includes an IGBT.
25. The power supply circuit according to claim 19, wherein the linear regulator circuit includes a linear voltage regulator and a capacitor.
26. The power supply circuit according to claim 19, wherein said source of AC
potential is from one of AC mains power, a transformer, an AC divider, and a filter.
potential is from one of AC mains power, a transformer, an AC divider, and a filter.
27. The power supply circuit according to claim 19, wherein the switching power supply is a non-isolated power supply.
28. The power supply circuit according to claim 19, wherein said dimmer device is variable between an OFF position and a full ON position, and said circuit is effective T0 provide power for operation of the switching power supply while said dimmer device is in the full ON position.
29. The power supply circuit according to claim 19, wherein the switching device includes a triac.
30. The power supply circuit according to claim 19, wherein said switching device is configured T0 operate T0 maximize said conduction of said source of AC
potential through said load throughout at least one cycle of said source of AC
potential and, said source of AC potential includes a zero-crossing point at time T0, wherein said switching device is configured T0 transition from said OFF
state to said ON state at a time T1 after a predetermined amount of time after said time T0 and said voltage doubler drives said output signal substantially throughout said predetermined amount of time.
potential through said load throughout at least one cycle of said source of AC
potential and, said source of AC potential includes a zero-crossing point at time T0, wherein said switching device is configured T0 transition from said OFF
state to said ON state at a time T1 after a predetermined amount of time after said time T0 and said voltage doubler drives said output signal substantially throughout said predetermined amount of time.
31. The power supply circuit according to claim 30, wherein said about twice said peak voltage of said source of AC potential during when said switching device is in said OFF state is about twice a voltage of said source of AC
potential at said time T1 whereby said voltage doubler charges said output signal to said twice said voltage of said source of AC potential at said time T1.
potential at said time T1 whereby said voltage doubler charges said output signal to said twice said voltage of said source of AC potential at said time T1.
32. The power supply circuit according to claim 30, wherein said time T1 occurs about when said source of AC potential is a minimum working voltage of said switching device, wherein said voltage multiplier is adapted to charge said output signal to twice a voltage of said source of AC potential at said time T1.
33. The power supply circuit according to claim 19, wherein the voltage doubler is one selected from the group consisting of a capacitor-diode network and a transformer.
34. The power supply circuit according to claim 33, wherein the voltage doubler is a half-wave series multiplier.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73098105P | 2005-10-27 | 2005-10-27 | |
| US60/730,981 | 2005-10-27 | ||
| US11/553,433 | 2006-10-26 | ||
| US11/553,433 US7489088B2 (en) | 2005-10-27 | 2006-10-26 | Power supply for 2-line dimmer |
| PCT/US2006/060319 WO2007051175A2 (en) | 2005-10-27 | 2006-10-27 | Power supply for 2-line dimmer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2626087A1 CA2626087A1 (en) | 2007-05-03 |
| CA2626087C true CA2626087C (en) | 2013-10-22 |
Family
ID=37968685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2626087A Expired - Fee Related CA2626087C (en) | 2005-10-27 | 2006-10-27 | Power supply for 2-line dimmer |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7489088B2 (en) |
| CN (1) | CN101371210B (en) |
| CA (1) | CA2626087C (en) |
| WO (1) | WO2007051175A2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7985937B2 (en) * | 2007-07-18 | 2011-07-26 | Leviton Manufacturing Co., Ltd. | Dimmer switch |
| US20100101924A1 (en) * | 2007-07-18 | 2010-04-29 | Leviton Manufacturing Co., Inc. | Switching device |
| US7804255B2 (en) * | 2007-07-26 | 2010-09-28 | Leviton Manufacturing Company, Inc. | Dimming system powered by two current sources and having an operation indicator module |
| US8922133B2 (en) | 2009-04-24 | 2014-12-30 | Lutron Electronics Co., Inc. | Smart electronic switch for low-power loads |
| CN101795523A (en) * | 2010-01-22 | 2010-08-04 | 广州市聚晖电子科技有限公司 | Single live wire power getting circuit |
| US9093894B2 (en) | 2012-12-17 | 2015-07-28 | Greenmark Technology Inc. | Multiple-level power control system |
| US9401588B2 (en) | 2013-04-18 | 2016-07-26 | Abl Ip Holding Llc | Universal phase dimming module |
| CN104635546A (en) * | 2015-02-16 | 2015-05-20 | 大连鼎创科技开发有限公司 | Non-leakage type single firing wire switching system and working method thereof |
| CN111599617A (en) * | 2020-06-02 | 2020-08-28 | 深圳市致趣科技有限公司 | Split type wall-in intelligent switch scheme |
| US11594950B2 (en) | 2021-01-22 | 2023-02-28 | Leviton Manufacturing Co., Inc. | Low ground current AC-DC power supply for no-neutral electrical devices and fault protection therefor |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2922309B2 (en) * | 1979-05-31 | 1981-07-16 | Siemens AG, 1000 Berlin und 8000 München | Electronic sensor on / off switch |
| US4504778A (en) * | 1982-07-15 | 1985-03-12 | Electronic Systems International, Inc. | Self-powered, self-regulated, electronic ac control system |
| US4684819A (en) * | 1986-10-14 | 1987-08-04 | General Motors Corporation | Vehicle daytime running lamps |
| US4678985A (en) * | 1986-10-31 | 1987-07-07 | Novitas, Inc. | Two-terminal line-powered control circuit |
| US5113120A (en) * | 1991-06-11 | 1992-05-12 | Scott James D | Dimmer circuit |
| JP2722869B2 (en) * | 1991-06-11 | 1998-03-09 | ヤマハ株式会社 | Power circuit |
| CN2192124Y (en) * | 1994-01-01 | 1995-03-15 | 李上灿 | AC and battery dual-purpose fluorescent lamp |
| US5600552A (en) * | 1995-03-02 | 1997-02-04 | Heath Company | Direct current power supply for use in series with a load in an alternating current circuit |
| US5801492A (en) * | 1996-05-30 | 1998-09-01 | Bobel; Andrzej | Electronic ballast for gas discharge lamp having primary and auxiliary resonant circuits |
| US6218787B1 (en) * | 1998-04-20 | 2001-04-17 | Jrs Technology Inc. | Remote dimming control system for a fluorescent ballast utilizing existing building wiring |
| US20020057080A1 (en) * | 2000-06-02 | 2002-05-16 | Iwatt | Optimized digital regulation of switching power supply |
| US6969959B2 (en) * | 2001-07-06 | 2005-11-29 | Lutron Electronics Co., Inc. | Electronic control systems and methods |
| US7091672B2 (en) * | 2003-06-10 | 2006-08-15 | Lutron Electronics Co., Inc. | High efficiency off-line linear power supply |
-
2006
- 2006-10-26 US US11/553,433 patent/US7489088B2/en not_active Expired - Fee Related
- 2006-10-27 WO PCT/US2006/060319 patent/WO2007051175A2/en active Application Filing
- 2006-10-27 CN CN2006800398845A patent/CN101371210B/en not_active Expired - Fee Related
- 2006-10-27 CA CA2626087A patent/CA2626087C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101371210A (en) | 2009-02-18 |
| CN101371210B (en) | 2011-10-12 |
| US20070126366A1 (en) | 2007-06-07 |
| WO2007051175A3 (en) | 2008-07-24 |
| CA2626087A1 (en) | 2007-05-03 |
| US7489088B2 (en) | 2009-02-10 |
| WO2007051175A2 (en) | 2007-05-03 |
| WO2007051175A9 (en) | 2008-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20201027 |