CN205092775U - High pressure input is turned over and is swashed power - Google Patents
High pressure input is turned over and is swashed power Download PDFInfo
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- CN205092775U CN205092775U CN201520912317.2U CN201520912317U CN205092775U CN 205092775 U CN205092775 U CN 205092775U CN 201520912317 U CN201520912317 U CN 201520912317U CN 205092775 U CN205092775 U CN 205092775U
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Abstract
The utility model provides a high pressure input is turned over and is swashed power, include: drive circuit, a snubber circuit, the 2nd snubber circuit, output Rectifier filter circuit, feedback circuit, prevent transposition and filter circuit, control circuit, power switch circuit, high -frequency transformer, snubber circuit 0, prevent that the input that joins conversely with filter circuit is used for connecing input direct current, output termination control circuit and high -frequency transformer, auxiliary power supply circuit gets electricity, output termination control circuit from high -frequency transformer's auxiliary winding, control circuit passes through drive circuit and connects power switch circuit, power switch circuit and high -frequency transformer primary winding are connected, a snubber circuit, the 2nd snubber circuit are connected with high -frequency transformer's a primary winding and the 2nd primary winding respectively. The utility model discloses a topology is swashed to double -barrelled reverse side, cooperates high withstand voltage MOS pipe, can realize the high efficiency, the high reliability to and super wide high voltage input.
Description
Technical field
The utility model relates to a kind of photo-voltaic power supply module, especially a kind of high input voltage Switching Power Supply.
Background technology
Along with the development of photovoltaic industry, photovoltaic array output voltage is more and more higher, and this just requires that photo-voltaic power supply module can adapt to higher input voltage.High voltage direct current can be converted to the 24V direct current that applicable header box uses by photo-voltaic power supply module, and the reliability of power module is most important for the stability of whole equipment.Along with photovoltaic array output voltage brings up to 1500VDC, the photo-voltaic power supply module of some maximum input voltage 1000VDC can not be satisfied the demand.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of high input voltage flyback sourse, can realize high efficiency, high reliability, and the input of ultra-wide high voltage.The technical solution adopted in the utility model is:
A kind of high input voltage flyback sourse, comprising: drive circuit, the first absorbing circuit, the second absorbing circuit, output rectifier and filter, feedback circuit, anti-reverse with filter circuit, control circuit, power switch circuit, high frequency transformer, auxiliary power supply circuit;
Anti-reversely be used for connecing input dc power with the input of filter circuit, output connection control circuit and high frequency transformer;
Auxiliary power supply circuit from the auxiliary winding power taking of high frequency transformer, output connection control circuit; Control circuit connects power switch circuit by drive circuit; Power switch circuit is connected with high frequency transformer armature winding;
First absorbing circuit, the second absorbing circuit are connected with the first armature winding of high frequency transformer and the second armature winding respectively;
Output rectifier and filter is connected with the secondary winding of high frequency transformer;
The voltage that the input of feedback circuit connects in output rectifier and filter exports, the output connection control circuit of feedback circuit.
Further,
Anti-reversely comprise diode D2 and electric capacity C2 with filter circuit;
Control circuit comprises resistance R1, R2, R6, R7, power supply control chip U1;
Auxiliary power supply circuit comprises diode D1 and electric capacity C1;
Power switch circuit comprises NMOS tube Q1, Q2, resistance R8;
The anode of diode D2 connects input dc power positive pole, and negative electrode connects one end of electric capacity C2 positive pole, resistance R1 and R2, and high frequency transformer first armature winding one end; The negative pole of electric capacity C2 connects input ground; The under-voltage test side of another termination power supply control chip U1 of resistance R1, and connect input ground by resistance R6; The termination input ground, ground of power supply control chip U1, the set of frequency end of U1 connects input ground by resistance R7; The other end of the feeder ear connecting resistance R2 of U1;
A termination input ground of winding assisted by high frequency transformer, and the other end connects the feeder ear of U1 by the diode D1 of forward; Electric capacity C1 positive pole connects diode D1 negative electrode, and negative pole connects input ground;
The driving termination drive circuit of power supply control chip U1, two outputs of drive circuit connect the grid of NMOS tube Q1 and Q2 respectively; The drain electrode of another termination NMOS tube Q1 of high frequency transformer first armature winding, the source electrode of Q1 connects high frequency transformer second armature winding one end, the drain electrode of another termination Q2 of high frequency transformer second armature winding, one end of source electrode connecting resistance R8 of Q2 and the sampling end of U1; Another termination input ground of resistance R8;
First absorbing circuit, the second absorbing circuit are connected between the first armature winding of high frequency transformer and the second armature winding two ends respectively.
Further,
Current rectifying and wave filtering circuit comprises diode D3, electric capacity C3;
Feedback circuit comprises resistance R3, R4, R5, source of stable pressure U3, photoelectrical coupler U2;
The anode of the secondary winding one terminating diode D3 of high frequency transformer, the negative electrode of diode D3 is as the positive output end of current rectifying and wave filtering circuit; The positive pole of electric capacity C3 connects the negative electrode of diode D3, and negative pole connects the other end of high frequency transformer secondary winding and exports ground;
The negative electrode of the one terminating diode D3 of resistance R3 and R5; The input collector electrode of another termination photoelectrical coupler U2 of resistance R5; The reference pole of another termination source of stable pressure U3 of resistance R3 is also connect by resistance R4 and exports ground; The negative electrode of source of stable pressure U3 connects the input emitter of photoelectrical coupler U2, and the anode of U3 connects and exports ground; The output anode of photoelectrical coupler U2 connects the feedback end of power supply control chip U1; The output negative electrode of U2 connects input ground.
The utility model has the advantage of: the utility model adopts double-transistor flyback topology, coordinates high withstand voltage metal-oxide-semiconductor, high frequency transformer realizes superelevation direct voltage to be converted to low-voltage dc voltage.The utility model can bear the photovoltaic array output voltage of 1500VDC.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present utility model.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the high input voltage flyback sourse that the utility model proposes, comprising:
Drive circuit 1, first absorbing circuit 2, second absorbing circuit 3, output rectifier and filter 4, feedback circuit 5, anti-reverse with filter circuit 6, control circuit 7, power switch circuit 8, high frequency transformer 9, auxiliary power supply circuit 10; Anti-reversely be used for connecing input dc power with the input of filter circuit 6, output connection control circuit 7 and high frequency transformer 9; Auxiliary power supply circuit 10 from the auxiliary winding power taking of high frequency transformer 9, output connection control circuit 7; Control circuit 7 connects power switch circuit 8 by drive circuit 1; Power switch circuit 8 is connected with high frequency transformer 9 armature winding; First absorbing circuit 2, second absorbing circuit 3 is connected with the first armature winding of high frequency transformer 9 and the second armature winding respectively; Output rectifier and filter 4 is connected with the secondary winding of high frequency transformer 9; The voltage that the input of feedback circuit 5 connects in output rectifier and filter 4 exports, the output connection control circuit 7 of feedback circuit 5.
Anti-reversely comprise diode D2 and electric capacity C2 with filter circuit 6; Control circuit 7 comprises resistance R1, R2, R6, R7, power supply control chip U1; Auxiliary power supply circuit 10 comprises diode D1 and electric capacity C1; Power switch circuit 8 comprises NMOS tube Q1, Q2, resistance R8;
Power supply control chip U1 adopts high precious OB2287IC, realizes input undervoltage and output overcurrent protection; Adopt double-transistor flyback topology in power switch circuit 8, effectively can reduce the voltage stress of power MOS pipe.
The anode of diode D2 connects input dc power positive pole, and negative electrode connects one end of electric capacity C2 positive pole, resistance R1 and R2, and high frequency transformer 9 first armature winding one end; The negative pole of electric capacity C2 connects input ground; The under-voltage test side of another termination power supply control chip U1 of resistance R1, and connect input ground by resistance R6; The termination input ground, ground of power supply control chip U1, the set of frequency end of U1 connects input ground by resistance R7; The other end of the feeder ear connecting resistance R2 of U1; A termination input ground of winding assisted by high frequency transformer 9, and the other end connects the feeder ear of U1 by the diode D1 of forward; Electric capacity C1 positive pole connects diode D1 negative electrode, and negative pole connects input ground; The driving termination drive circuit 1 of power supply control chip U1, two outputs of drive circuit 1 connect the grid of NMOS tube Q1 and Q2 respectively; The drain electrode of another termination NMOS tube Q1 of high frequency transformer 9 first armature winding, the source electrode of Q1 connects high frequency transformer 9 second armature winding one end, the drain electrode of high frequency transformer 9 second another termination Q2 of armature winding, one end of source electrode connecting resistance R8 of Q2 and the sampling end of U1; Another termination input ground of resistance R8.
Current rectifying and wave filtering circuit 4 comprises diode D3, electric capacity C3; Feedback circuit 5 comprises resistance R3, R4, R5, source of stable pressure U3, photoelectrical coupler U2; The anode of the secondary winding one terminating diode D3 of high frequency transformer 9, the negative electrode of diode D3 is as the positive output end of current rectifying and wave filtering circuit 4; The positive pole of electric capacity C3 connects the negative electrode of diode D3, and negative pole connects the other end of high frequency transformer 9 secondary winding and exports ground;
The negative electrode of the one terminating diode D3 of resistance R3 and R5; The input collector electrode of another termination photoelectrical coupler U2 of resistance R5; The reference pole of another termination source of stable pressure U3 of resistance R3 is also connect by resistance R4 and exports ground; The negative electrode of source of stable pressure U3 connects the input emitter of photoelectrical coupler U2, and the anode of U3 connects and exports ground; The output anode of photoelectrical coupler U2 connects the feedback end of power supply control chip U1; The output negative electrode of U2 connects input ground.
The Main Function of each part mentioned above circuit is described below:
Anti-reversely form primarily of diode D2 and filter capacitor C2 with filter circuit 6, the effect of D2 is that when preventing input both positive and negative polarity wrong, protection power source module is not damaged.C2 is used for level and smooth input voltage.
Control circuit 7: be with OB2287 chip for core, R7 is used for design circuit operating frequency.R1 and R6 electric resistance partial pressure does input undervoltage protection to chip.R2 is chip enable resistance, gives chip power supply after circuit normally works by auxiliary power supply circuit 10.Chip 2 pin is feedback end, by the feedback signal of this pin, controls opening and closedown of power MOS pipe.Chip 6 pin (sampling end) is connected to the sample resistance R8 of power switch circuit, for elementary overcurrent protection.8 pin are driver output pin (drive end).2 pin are under-voltage test side; 4 pin are set of frequency end.
Drive circuit 1: by driving transformer, the compositions such as resistance capacitance, realize an input drive signal and drive Q1 simultaneously, Q2 two power MOS pipes.
Auxiliary power supply circuit 10:OB2287 is started by resistance R2, is powered after circuit normally works by auxiliary power supply circuit 10.
First absorbing circuit 2, second absorbing circuit 3 is connected between the first armature winding of high frequency transformer 9 and the second armature winding two ends respectively.Absorbing circuit comprises damper diode, resistance, electric capacity, TVS pipe.For absorbing the due to voltage spikes of transformer leakage inductance and MOS equivalent output capacitance concussion generation, ensure that the drain-source voltage of Q1, Q2 is in suitable scope.
Power switch circuit 8: by NMOS tube Q1, Q2, the compositions such as resistance.Circuit structure of the present utility model is double-transistor flyback formula Switching Power Supply, and Q1, Q2 two metal-oxide-semiconductor series connection reduce the voltage stress of single metal-oxide-semiconductor.
Output rectifier and filter 4: this high input voltage flyback sourse module single channel 24VDC exports.D3 rectification, C3 does output filtering.
High frequency transformer 9: be made up of EER28 magnetic core and skeleton and enamelled wire, realize input and output isolation and energy transferring.
Feedback circuit 5: by optocoupler U2, source of stable pressure U3(model TL431) and the composition such as electricity group R3, R4, R5.Output voltage signal is delivered to 2 pin (feedback end) of power supply control chip U1 by optocoupler U2 isolation, realizes closed-loop control.
Claims (3)
1. a high input voltage flyback sourse, is characterized in that, comprising:
Drive circuit (1), the first absorbing circuit (2), the second absorbing circuit (3), output rectifier and filter (4), feedback circuit (5), anti-reverse with filter circuit (6), control circuit (7), power switch circuit (8), high frequency transformer (9), auxiliary power supply circuit (10);
Anti-reversely be used for connecing input dc power with the input of filter circuit (6), output connection control circuit (7) and high frequency transformer (9);
Auxiliary power supply circuit (10) from the auxiliary winding power taking of high frequency transformer (9), output connection control circuit (7); Control circuit (7) connects power switch circuit (8) by drive circuit (1); Power switch circuit (8) is connected with high frequency transformer (9) armature winding;
First absorbing circuit (2), the second absorbing circuit (3) are connected with the first armature winding of high frequency transformer (9) and the second armature winding respectively;
Output rectifier and filter (4) is connected with the secondary winding of high frequency transformer (9);
The voltage that the input of feedback circuit (5) connects in output rectifier and filter (4) exports, the output connection control circuit (7) of feedback circuit (5).
2. high input voltage flyback sourse as claimed in claim 1, is characterized in that:
Anti-reversely comprise diode D2 and electric capacity C2 with filter circuit (6);
Control circuit (7) comprises resistance R1, R2, R6, R7, power supply control chip U1;
Auxiliary power supply circuit (10) comprises diode D1 and electric capacity C1;
Power switch circuit (8) comprises NMOS tube Q1, Q2, resistance R8;
The anode of diode D2 connects input dc power positive pole, and negative electrode connects one end of electric capacity C2 positive pole, resistance R1 and R2, and high frequency transformer (9) first armature winding one end; The negative pole of electric capacity C2 connects input ground; The under-voltage test side of another termination power supply control chip U1 of resistance R1, and connect input ground by resistance R6; The termination input ground, ground of power supply control chip U1, the set of frequency end of U1 connects input ground by resistance R7; The other end of the feeder ear connecting resistance R2 of U1;
One termination input ground of the auxiliary winding of high frequency transformer (9), the other end connects the feeder ear of U1 by the diode D1 of forward; Electric capacity C1 positive pole connects diode D1 negative electrode, and negative pole connects input ground;
The driving termination drive circuit (1) of power supply control chip U1, two outputs of drive circuit (1) connect the grid of NMOS tube Q1 and Q2 respectively; The drain electrode of another termination NMOS tube Q1 of high frequency transformer (9) first armature winding, the source electrode of Q1 connects high frequency transformer (9) second armature winding one end, the drain electrode of high frequency transformer (9) second another termination Q2 of armature winding, one end of source electrode connecting resistance R8 of Q2 and the sampling end of U1; Another termination input ground of resistance R8;
First absorbing circuit (2), the second absorbing circuit (3) are connected between the first armature winding of high frequency transformer (9) and the second armature winding two ends respectively.
3. high input voltage flyback sourse as claimed in claim 1, is characterized in that:
Current rectifying and wave filtering circuit (4) comprises diode D3, electric capacity C3;
Feedback circuit (5) comprises resistance R3, R4, R5, source of stable pressure U3, photoelectrical coupler U2;
The anode of the secondary winding one terminating diode D3 of high frequency transformer (9), the negative electrode of diode D3 is as the positive output end of current rectifying and wave filtering circuit 4; The positive pole of electric capacity C3 connects the negative electrode of diode D3, and negative pole connects the other end of high frequency transformer (9) secondary winding and exports ground;
The negative electrode of the one terminating diode D3 of resistance R3 and R5; The input collector electrode of another termination photoelectrical coupler U2 of resistance R5; The reference pole of another termination source of stable pressure U3 of resistance R3 is also connect by resistance R4 and exports ground; The negative electrode of source of stable pressure U3 connects the input emitter of photoelectrical coupler U2, and the anode of U3 connects and exports ground; The output anode of photoelectrical coupler U2 connects the feedback end of power supply control chip U1; The output negative electrode of U2 connects input ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520912317.2U CN205092775U (en) | 2015-11-16 | 2015-11-16 | High pressure input is turned over and is swashed power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520912317.2U CN205092775U (en) | 2015-11-16 | 2015-11-16 | High pressure input is turned over and is swashed power |
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| CN205092775U true CN205092775U (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520912317.2U Active CN205092775U (en) | 2015-11-16 | 2015-11-16 | High pressure input is turned over and is swashed power |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130328A (en) * | 2016-08-20 | 2016-11-16 | 嘉兴国电通新能源科技有限公司 | A kind of double-tube series inverse-excitation type switch power-supply |
| CN106300987A (en) * | 2016-08-05 | 2017-01-04 | 山东深川变频科技股份有限公司 | A kind of low cost converter bus measuring circuit |
| CN108023490A (en) * | 2017-12-28 | 2018-05-11 | 佛山市三水汇明达光电设备有限公司 | A kind of on-off circuit that power output is improved using single-ended forward type drive circuit |
| CN109742958A (en) * | 2019-03-18 | 2019-05-10 | 安徽衡孚电子科技有限公司 | A kind of high-frequency and high-voltage photovoltaic Switching Power Supply |
| CN112332636A (en) * | 2020-10-10 | 2021-02-05 | 浙江晨泰科技股份有限公司 | Guide rail meter with anti-strong magnetic isolation power supply |
| CN112737341A (en) * | 2020-12-25 | 2021-04-30 | 航天科技控股集团股份有限公司 | Auxiliary high-frequency control power supply applied to vehicle-mounted inverter |
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2015
- 2015-11-16 CN CN201520912317.2U patent/CN205092775U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300987A (en) * | 2016-08-05 | 2017-01-04 | 山东深川变频科技股份有限公司 | A kind of low cost converter bus measuring circuit |
| CN106130328A (en) * | 2016-08-20 | 2016-11-16 | 嘉兴国电通新能源科技有限公司 | A kind of double-tube series inverse-excitation type switch power-supply |
| CN108023490A (en) * | 2017-12-28 | 2018-05-11 | 佛山市三水汇明达光电设备有限公司 | A kind of on-off circuit that power output is improved using single-ended forward type drive circuit |
| CN109742958A (en) * | 2019-03-18 | 2019-05-10 | 安徽衡孚电子科技有限公司 | A kind of high-frequency and high-voltage photovoltaic Switching Power Supply |
| CN109742958B (en) * | 2019-03-18 | 2024-02-23 | 安徽衡孚电子科技有限公司 | High-frequency high-voltage photovoltaic switching power supply |
| CN112332636A (en) * | 2020-10-10 | 2021-02-05 | 浙江晨泰科技股份有限公司 | Guide rail meter with anti-strong magnetic isolation power supply |
| CN112737341A (en) * | 2020-12-25 | 2021-04-30 | 航天科技控股集团股份有限公司 | Auxiliary high-frequency control power supply applied to vehicle-mounted inverter |
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