CN102694471A - Auxiliary power supply system for photovoltaic inverter - Google Patents
Auxiliary power supply system for photovoltaic inverter Download PDFInfo
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- CN102694471A CN102694471A CN2012101669517A CN201210166951A CN102694471A CN 102694471 A CN102694471 A CN 102694471A CN 2012101669517 A CN2012101669517 A CN 2012101669517A CN 201210166951 A CN201210166951 A CN 201210166951A CN 102694471 A CN102694471 A CN 102694471A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention provides an auxiliary power supply system for a photovoltaic inverter. The auxiliary power supply system for the photovoltaic inverter is characterized by comprising a starting circuit unit, wherein the input end of the starting circuit unit is connected with a direct-current (DC) generatrix voltage of an inverter; the DC generatrix voltage of the inverter is also connected with a power supply conversion circuit; the output end of the starting circuit unit is connected with a current-limiting delay trigger circuit unit; the enabling end of a power supply control unit is connected with a control unit; the control unit enables the power supply control unit according to a second voltage control signal generated by a back-end detection and protection circuit unit; the power supply control unit is connected with a bootstrap circuit unit; and after the power supply control unit can generate a stable DC voltage, the bootstrap circuit unit works under the control of a first voltage control signal generated by the back-end detection and protection circuit unit. The auxiliary power supply system for the photovoltaic inverter has the advantages that a dual closed-loop feedback control system is adopted, so that a stable output voltage of an auxiliary power supply is ensured; and control signals are combined with a controller reset circuit logically, so that the stable operation of control is ensured.
Description
Technical field
The present invention relates to a kind of auxiliary power supply of photovoltaic inverter system, belong to the solar photovoltaic technology field.
Background technology
The accessory power supply of photovoltaic DC-to-AC converter has been compared a great difference with Switching Power Supply commonly used.Usually, the electricity consumption of regular tap power supply is after the alternating current of electrical network passes through transformation, rectification, receive its input, so the voltage of Switching Power Supply to be metastable.Yet in photovoltaic parallel in system, the direct current of solar panel output is directly received the input of accessory power supply, no longer passes through the rectification link; Along with the variation of solar irradiation intensity and ambient temperature, bigger fluctuation can appear in the voltage of photovoltaic array output in addition.Therefore the input terminal voltage of the accessory power supply of photovoltaic combining inverter is unsettled, and this just requires the operating voltage range of solar inverter secondary power system wideer.But in the application of reality, tend to run into, can't satisfy the system power demand constantly, cause repeatedly starting and stopping auxiliary power supply because of the photovoltaic array output-power fluctuation; Though or accessory power supply can start, do not reach the problem of accessory power supply operate as normal in the wide input voltage range that needs.
Summary of the invention
The purpose of this invention is to provide a kind of cut-in voltage value can set, and can avoid repeatedly starting and stopping, the solar photovoltaic inverter secondary power system that power consumption is little and efficient is high.
In order to achieve the above object; Technical scheme of the present invention has provided a kind of auxiliary power supply of photovoltaic inverter system; It is characterized in that: comprise the start-up circuit unit, the input of start-up circuit unit with link to each other with inverter DC DC bus-bar voltage, inverter DC DC bus-bar voltage also connects power-switching circuit; Power-switching circuit comprises anti-violent change depressor and power control unit; The output of start-up circuit unit connects current limliting delay trigger circuit unit, in start-up course, thereby is that power control unit provides and opens threshold voltage and make the work of anti-violent change depressor by current limliting delay trigger circuit unit; The Enable Pin of power control unit connects control unit; Second voltage control signal that control unit detects the generation of protective circuit unit according to the rear end enables power control unit, and power control unit links to each other with the boostrap circuit unit, after power control unit can produce the galvanic current pressure; The work under the control of first voltage control signal of rear end detection protective circuit unit generation of boostrap circuit unit is that power control unit provides operating voltage V by boostrap circuit unit controls current limliting delay trigger circuit unit
Cc, simultaneously, the start-up circuit unit is closed, thereby is accomplished start-up course by the boostrap circuit unit.
Preferably, said start-up circuit unit comprises first voltage stabilizing didoe, and the negative electrode of first voltage stabilizing didoe connects said inverter DC DC bus-bar voltage; The anode of first voltage stabilizing didoe links to each other with the drain electrode of first resistance and MOSFET pipe respectively, first resistance connect successively second resistance and the 3rd resistance, and the 3rd resistance links to each other with the negative electrode of the 3rd voltage stabilizing didoe; The anode of the 3rd voltage stabilizing didoe connects the anode of second diode; The negative electrode of second diode connects said boostrap circuit unit, and the source electrode of MOSFET pipe connects the 4th resistance, and the 4th resistance links to each other with said boostrap circuit unit; The grid of the one MOSFET pipe connects the collector electrode of first triode; The base stage of first triode links to each other with the 5th resistance, and the 5th resistance connects said boostrap circuit unit, and the emitter-base bandgap grading of first triode connects the negative electrode of the 4th voltage stabilizing didoe; The plus earth of the 4th voltage stabilizing didoe provides starting resistor U by the base stage of first triode through the 5th resistance
0, the voltage stabilizing value of first voltage stabilizing didoe and the 3rd voltage stabilizing didoe and starting resistor U
0Sum is for opening the DC bus-bar voltage minimum value of start-up circuit unit, and promptly when the inverter d-c bus voltage value is higher than this minimum value, just start working in the start-up circuit unit.
Preferably; Said power-switching circuit comprises anti-violent change depressor; One end of the primary coil of anti-violent change depressor connects said DC bus-bar voltage, and the other end connects the drain electrode of the 2nd MOSFET pipe, by the voltage output end output output voltage V of the secondary coil of anti-violent change depressor
OutThe voltage output end of the secondary coil of anti-violent change depressor also takes back the voltage stabilizing input of power control unit; The output of power control unit connects the grid of the 2nd MOSFET pipe, and the source electrode of the 2nd MOSFET pipe is respectively through the 18 grounding through resistance and connect said control unit.
Preferably; Said control unit comprises the 5th triode; The base stage of the 5th triode connects said second voltage control signal through the tenth resistance, cross-over connection the 11 resistance between the emitter of the 5th triode and base stage, and the emitter of the 5th triode connects reference voltage V
Ref, the collector electrode of the 5th triode connects the Enable Pin of said power control unit and the source electrode of said the 2nd MOSFET pipe respectively.
Preferably; Said current limliting delay trigger circuit unit comprises the current-limiting circuit and first electric capacity; Said start-up circuit unit is first electric capacity charging through current-limiting circuit, the startup stage, be that said power control unit provides the said threshold voltage of opening by first electric capacity after the charging; Behind said boostrap circuit unit starting, the divider resistance that is comprised through current limliting delay trigger circuit unit by said boostrap circuit unit is that said power control unit provides operating voltage V
Cc
Preferably; Said boostrap circuit unit comprises the 4th triode; The collector electrode of the 4th triode connects the anode of the 6th diode and the 5th diode respectively; The negative electrode of the 6th diode and the 5th diode connects said start-up circuit unit and said current limliting delay trigger circuit unit respectively, and the emitter of the 4th triode connects said power-switching circuit, and the base stage of the 4th triode connects said first voltage control signal through the 9th resistance.
Advantage of the present invention is: adopt two close-loop feedback control systems, guarantee the output voltage stabilization of accessory power supply; Adopt control signal and controller reset circuit logical combination, guaranteed the stable operation of control, prevent to make control system instability generation order disorderly because of power supply is unstable.Further advantages of the invention are: the start-up circuit that 1, is made up of backward diode can be set secondary power system cut-in voltage value and starting power, thereby avoids accessory power supply under the weak excessively situation of illumination, to open the protection inverter; Start-up circuit only is operated in the start-up course, and after power supply was stable, start-up circuit cut out automatically; 2, the secondary power system working range is wide, system's free of losses, and power consumption is extremely low, is particularly suitable for the photovoltaic inversion system and uses.
Description of drawings
Fig. 1 is the position view of secondary power system provided by the invention at whole photovoltaic inversion system;
Fig. 2 is an auxiliary power supply of photovoltaic inverter provided by the invention system control flow chart;
Fig. 3 starts boostrap circuit figure for photovoltaic DC-to-AC converter;
Fig. 4 is auxiliary power supply of photovoltaic inverter conversion and control circuit figure.
Embodiment
For making the present invention more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
The present invention is directed to the requirement of auxiliary power supply of photovoltaic inverter, design and just can realize bootstrapping after a kind of startup, can avoid repeatedly starting and stopping, the solar photovoltaic inverter secondary power system that power consumption is little and efficient is high.The position of this system in the photovoltaic inversion system is as shown in Figure 1, and an end links to each other with inverter DC DC bus-bar voltage, and the other end links to each other and the required supply power voltage of each of output inverter with detection protective circuit unit.In conjunction with Fig. 3 and Fig. 3, the present invention specifically comprises five circuit units, is respectively start-up circuit unit 1, current limliting delay trigger circuit unit 2, boostrap circuit unit 3, power-switching circuit unit 4 and control circuit unit 5.The input of start-up circuit unit 1 links to each other with inverter DC DC bus-bar voltage; Inverter DC DC bus-bar voltage also connects power-switching circuit 4; Power-switching circuit 4 comprises anti-violent change depressor T1 and power control unit; The output of start-up circuit unit 1 connects current limliting delay trigger circuit unit 2, in start-up course, thereby is opened threshold voltage and makes anti-violent change depressor T1 work for power control unit provides by current limliting delay trigger circuit unit 2; The Enable Pin CS of power control unit connects control unit 5; The second voltage control signal K2 that control unit 5 detects the generation of protective circuit unit according to the rear end enables power control unit, and power control unit links to each other with boostrap circuit unit 3, after power control unit can produce the galvanic current pressure; Boostrap circuit unit 3 work under the control of the first voltage control signal K1 of rear end detection protective circuit unit generation provides operating voltage V by 3 control current limliting delay trigger circuit unit 2, boostrap circuit unit for power control unit
Cc, simultaneously, start-up circuit unit 1 is closed, thereby is accomplished start-up course by boostrap circuit unit 3.
Secondary power system specific embodiment circuit such as Fig. 3 and Fig. 4 are said.This circuit decapacitation detects busbar voltage in real time; Can also successively open start-up circuit unit 1, current limliting delay trigger circuit unit 2, boostrap circuit unit 3, the power-switching circuit unit 4 of secondary power system in order according to the voltage threshold of setting, and can when busbar voltage drops, prevent the repeatedly starting and stopping of accessory power supply.Specify as follows:
Start-up circuit unit 1 comprises the first voltage stabilizing didoe D1; The negative electrode of the first voltage stabilizing didoe D1 connects said inverter DC DC bus-bar voltage; The anode of the first voltage stabilizing didoe D1 links to each other with the drain electrode of first resistance R 1 and MOSFET pipe M1 respectively, and connect successively second resistance R 2 and the 3rd resistance R 3, the three resistance R 3 of first resistance R 1 link to each other with the negative electrode of the 3rd voltage stabilizing didoe D3; The anode of the 3rd voltage stabilizing didoe D3 connects the anode of the second diode D2; The negative electrode of the second diode D2 connects the negative electrode of the 6th diode D6 of boostrap circuit unit 3, and the source electrode of MOSFET pipe M1 connects the 4th resistance R 4, the four resistance R 4 and links to each other with the negative electrode of the 6th diode D6 of boostrap circuit unit 3; The grid of the one MOSFET pipe M1 connects the collector electrode of the first triode Q1; The base stage of the first triode Q1 links to each other with the 5th resistance R 5, and the emitter-base bandgap grading that the 5th resistance R 5 connects said boostrap circuit unit 3, the first triode Q1 connects the negative electrode of the 4th voltage stabilizing didoe D4; The plus earth of the 4th voltage stabilizing didoe D4 provides starting resistor U by the base stage of the first triode Q1 through the 5th resistance R 5
0, starting resistor U
0By the 4th voltage stabilizing didoe D4 decision, voltage stabilizing value and the starting resistor U of the first voltage stabilizing didoe D1 and the 3rd voltage stabilizing didoe D3
0Sum is for opening the DC bus-bar voltage minimum value of start-up circuit unit, and promptly when the inverter d-c bus voltage value is higher than this minimum value, just start working in the start-up circuit unit.
Current limliting circuits for triggering unit 2 comprises the current-limiting circuit that is made up of the second triode Q2, the 3rd triode Q3, the 6th resistance R 6 and the 7th resistance R 7.1 generates the starting resistor U that is about voltage reference value in the start-up circuit unit
0Process in; Through the 6th resistance R 6 and with the second triode Q2, the 3rd triode Q3 is that the current-limiting circuit that main element constitutes gives first capacitor C 1 charging; When the voltage of first capacitor C 1 reach power supply control chip in the power control unit open threshold voltage after, trigger anti-violent change depressor T1 work by power supply control chip.The effect of current-limiting circuit is to prevent that the electric current that charges to first capacitor C 1 is excessive, makes the start-up circuit load overweight.
As shown in Figure 4; Power-switching circuit 4 comprises anti-violent change depressor T1; On the primary coil of anti-violent change depressor T1, be connected with the 19 resistance R 19, the 6th capacitor C 6, the tenth voltage stabilizing didoe D10 and the 9th voltage stabilizing didoe D9; One end of its primary coil connects DC bus-bar voltage, and the other end connects the drain electrode of the 2nd MOSFET pipe M2.Voltage output end output output voltage V by the secondary coil of anti-violent change depressor T1
Out, on this secondary coil, be connected with the 7th diode D7, the 8th diode D8, first fuse F 1, second fuse F 2, the 4th capacitor C 4, the 5th capacitor C the 5, the 20 resistance R 20 and the 21 resistance R 21.The voltage output end of the secondary coil of anti-violent change depressor T1 also takes back the voltage stabilizing input FB of power control unit.Wherein, power control unit adopts power supply control chip UCC2801D.The voltage output end of secondary coil through the bleeder circuit dividing potential drop of forming by the 12 resistance R 12 and the 13 resistance R 13 after, the voltage stabilizing input FB through the 14 resistance R the 14, the 15 resistance R 15, second capacitor C 2 and the 3rd capacitor C 3 connection power supply control chip UCC2801D again.The output OUT of power supply control chip UCC2801D connects the bleeder circuit of being made up of the 16 resistance R 16 and the 17 resistance R 17, and the grid of the 2nd MOSFET pipe M2 connects the 17 resistance R 17.The source electrode of the 2nd MOSFET pipe M2 is respectively through the 18 resistance R 18 ground connection and connection control unit 5.
The first voltage control signal K1 that secondary power system provided by the invention is produced by detection protective circuit unit, rear end is connected to boostrap circuit unit 3 and constitutes close-loop feedback; Simultaneously, the second voltage control signal K2 signal that is produced by this detection protective circuit unit is connected to power-switching circuit unit 4 and constitutes close-loop feedback.
Secondary power system control flow of the present invention is seen Fig. 2, and what wherein need explain is: 1. the second voltage control signal K2 is unstable, makes the first voltage control signal K1 also unstable, and accessory power supply can't operate as normal; The second voltage control signal K2 stable after, accessory power supply can be opened, power supply is booted in the voltage setting range, makes accessory power supply chip operate as normal.
When inverter DC DC bus-bar voltage when opening the DC bus-bar voltage minimum value of start-up circuit unit, start-up circuit unit 1 starts also output starting resistor U
0, simultaneously, will place high level to enable power supply control chip UCC2801D, otherwise the second voltage control signal K2 remains at low level through the second voltage control signal K2.By starting resistor U
0Be the charging of first capacitor C 1, after first capacitor C 1 was full of, the working power port Vcc through power supply control chip UCC2801D opened threshold voltage for it provides, and power supply control chip UCC2801D starts working.Control anti-violent change depressor T1 by power supply control chip UCC2801D and produce direct voltage, this direct voltage feeds back to the voltage stabilizing input FB of power supply control chip UCC2801D, by power supply control chip UCC2801D with its voltage stabilizing after, output stable DC voltage.Judge whether this stable DC voltage is stable, if stable, thus then place high level to open boostrap circuit unit 3 the first voltage control signal K1, and the first voltage control signal K1 is in low level state always before this.Boostrap circuit unit 3 adds to the anode of the 5th diode D5 and the 6th diode D6 with this stable DC voltage, for power supply control chip UCC2801D operating voltage V is provided through the 8th resistance R 8 by the 5th diode D5
Cc, make power supply control chip UCC2801D can pass through output OUT output pwm signal, thereby the voltage that makes anti-violent change depressor T1 form different potentials is given the power supply of solar inverter each several part.The 6th diode D6 then forces the collector potential of the first triode Q1 to draw simultaneously; Make the first triode Q1 saturation conduction; Then make the grid potential of MOSFET pipe M1 be pulled down to about voltage reference value; The one MOSFET pipe M1 ends, thereby the end of auxiliary power start process is closed in start-up circuit unit 1.
Claims (6)
1. auxiliary power supply of photovoltaic inverter system; It is characterized in that: comprise start-up circuit unit (1); The input of start-up circuit unit (1) with link to each other with inverter DC DC bus-bar voltage; Inverter DC DC bus-bar voltage also connects power-switching circuit (4), and power-switching circuit (4) comprises anti-violent change depressor (T1) and power control unit, and the output of start-up circuit unit (1) connects current limliting delay trigger circuit unit (2); In start-up course; By current limliting delay trigger circuit unit (2) thus open threshold voltage and make anti-violent change depressor (T1) work for power control unit provides, the Enable Pin of power control unit (CS) connects control unit (5), control unit (5) detects second voltage control signal (K2) that the protective circuit unit produces according to the rear end and enables power control unit; Power control unit links to each other with boostrap circuit unit (3); After power control unit can produce the galvanic current pressure, boostrap circuit unit (3) work under the control of first voltage control signal (K1) of rear end detection protective circuit unit generation provided operating voltage V by boostrap circuit unit (3) control current limliting delay trigger circuit unit (2) for power control unit
Cc, simultaneously, start-up circuit unit (1) is closed, thereby is accomplished start-up course by boostrap circuit unit (3).
2. a kind of auxiliary power supply of photovoltaic inverter as claimed in claim 1 system; It is characterized in that: said start-up circuit unit (1) comprises first voltage stabilizing didoe (D1); The negative electrode of first voltage stabilizing didoe (D1) connects said inverter DC DC bus-bar voltage; The anode of first voltage stabilizing didoe (D1) links to each other with the drain electrode of first resistance (R1) and MOSFET pipe (M1) respectively, first resistance (R1) connect successively second resistance (R2) and the 3rd resistance (R3), and the 3rd resistance (R3) links to each other with the negative electrode of the 3rd voltage stabilizing didoe (D3); The anode of the 3rd voltage stabilizing didoe (D3) connects the anode of second diode (D2); The negative electrode of second diode (D2) connects said boostrap circuit unit (3), and the source electrode of MOSFET pipe (M1) connects the 4th resistance (R4), and the 4th resistance (R4) links to each other with said boostrap circuit unit (3); The grid of the one MOSFET pipe (M1) connects the collector electrode of first triode (Q1); The base stage of first triode (Q1) links to each other with the 5th resistance (R5), and the 5th resistance (R5) connects said boostrap circuit unit (3), and the emitter-base bandgap grading of first triode (Q1) connects the negative electrode of the 4th voltage stabilizing didoe (D4); The plus earth of the 4th voltage stabilizing didoe (D4) provides starting resistor U by the base stage of first triode (Q1) through the 5th resistance (R5)
0, the voltage stabilizing value and the starting resistor U of first voltage stabilizing didoe (D1) and the 3rd voltage stabilizing didoe (D3)
0Sum is for opening the DC bus-bar voltage minimum value of start-up circuit unit, and promptly when the inverter d-c bus voltage value is higher than this minimum value, just start working in the start-up circuit unit.
3. a kind of auxiliary power supply of photovoltaic inverter as claimed in claim 1 system; It is characterized in that: said power-switching circuit (4) comprises anti-violent change depressor (T1); One end of the primary coil of anti-violent change depressor (T1) connects said DC bus-bar voltage; The other end connects the drain electrode of the 2nd MOSFET pipe (M2), by the voltage output end output output voltage V of the secondary coil of anti-violent change depressor (T1)
OutThe voltage output end of the secondary coil of anti-violent change depressor (T1) also takes back the voltage stabilizing input (FB) of power control unit; The output of power control unit (OUT) connects the grid of MOSFET pipe (M2), and the source electrode of the 2nd MOSFET pipe (M2) is respectively through the 18 resistance (R18) ground connection and connect said control unit (5).
4. a kind of auxiliary power supply of photovoltaic inverter as claimed in claim 3 system; It is characterized in that: said control unit (5) comprises the 5th triode (Q5); The base stage of the 5th triode (Q5) connects said second voltage control signal (K2) through the tenth resistance (R10); Cross-over connection the 11 resistance (R11) between the emitter of the 5th triode (Q5) and base stage, the emitter of the 5th triode (Q5) connects reference voltage V
Ref, the collector electrode of the 5th triode (Q5) connects the Enable Pin (CS) of said power control unit and the source electrode of said MOSFET pipe (M2) respectively.
5. a kind of auxiliary power supply of photovoltaic inverter as claimed in claim 1 system; It is characterized in that: said current limliting delay trigger circuit unit (2) comprises current-limiting circuit and first electric capacity (C1); Said start-up circuit unit (1) is first electric capacity (C1) charging through current-limiting circuit; The startup stage; First electric capacity (C1) by after the charging provides the said threshold voltage of opening for said power control unit, and after said boostrap circuit unit (3) started, the divider resistance that is comprised through current limliting delay trigger circuit unit (2) by said boostrap circuit unit (3) was that said power control unit provides operating voltage V
Cc
6. a kind of auxiliary power supply of photovoltaic inverter as claimed in claim 1 system; It is characterized in that: said boostrap circuit unit (3) comprises the 4th triode (Q4); The collector electrode of the 4th triode (Q4) connects the anode of the 6th diode (D6) and the 5th diode (D5) respectively; The negative electrode of the 6th diode (D6) and the 5th diode (D5) connects said start-up circuit unit (1) and said current limliting delay trigger circuit unit (2) respectively; The emitter of the 4th triode (Q4) connects said power-switching circuit (4), and the base stage of the 4th triode (Q4) connects said first voltage control signal (K1) through the 9th resistance (R9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210166951.7A CN102694471B (en) | 2012-05-24 | 2012-05-24 | Auxiliary power supply system for photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210166951.7A CN102694471B (en) | 2012-05-24 | 2012-05-24 | Auxiliary power supply system for photovoltaic inverter |
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| Publication Number | Publication Date |
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| CN102694471A true CN102694471A (en) | 2012-09-26 |
| CN102694471B CN102694471B (en) | 2014-10-15 |
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| CN201210166951.7A Expired - Fee Related CN102694471B (en) | 2012-05-24 | 2012-05-24 | Auxiliary power supply system for photovoltaic inverter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103956889A (en) * | 2014-04-30 | 2014-07-30 | 瑞斯康达科技发展股份有限公司 | Enable signal control circuit and power circuit |
| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| CN112566313A (en) * | 2020-12-07 | 2021-03-26 | 公牛集团股份有限公司 | Time-delay starting circuit and lamp |
| WO2022110608A1 (en) * | 2020-11-30 | 2022-06-02 | 江苏科技大学 | Direct current high-power power supply soft start circuit and method |
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| CN102361402A (en) * | 2011-10-21 | 2012-02-22 | 广州金升阳科技有限公司 | Switching power supply circuit |
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| US5479333A (en) * | 1994-04-25 | 1995-12-26 | Chrysler Corporation | Power supply start up booster circuit |
| US20070076447A1 (en) * | 2005-06-24 | 2007-04-05 | Friwo Mobile Power Gmbh | Control circuit for controlling the current and voltage for a switched-mode power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104124698A (en) * | 2013-04-25 | 2014-10-29 | 惠州天能源逆变技术有限公司 | Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter |
| CN103956889A (en) * | 2014-04-30 | 2014-07-30 | 瑞斯康达科技发展股份有限公司 | Enable signal control circuit and power circuit |
| WO2022110608A1 (en) * | 2020-11-30 | 2022-06-02 | 江苏科技大学 | Direct current high-power power supply soft start circuit and method |
| CN112566313A (en) * | 2020-12-07 | 2021-03-26 | 公牛集团股份有限公司 | Time-delay starting circuit and lamp |
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| Publication number | Publication date |
|---|---|
| CN102694471B (en) | 2014-10-15 |
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