CN202197214U - Switching power supply circuit - Google Patents
Switching power supply circuit Download PDFInfo
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- CN202197214U CN202197214U CN2011202283308U CN201120228330U CN202197214U CN 202197214 U CN202197214 U CN 202197214U CN 2011202283308 U CN2011202283308 U CN 2011202283308U CN 201120228330 U CN201120228330 U CN 201120228330U CN 202197214 U CN202197214 U CN 202197214U
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Abstract
A switching power supply circuit comprises a primary rectification filter circuit, an inversion circuit and a secondary rectification filter circuit; wherein the primary rectification filter circuit comprises a fuse FR1, a piezoresistor VZ1, diodes D2, D2, D3, D4, a resistor R1, capacitors C1, C2, and an inductor L1; one end of the FR1 is connected with a live line, the other end of the FR1 is connected with one end of the VZ1, a positive electrode of the D1 and a negative electrode of the D4, the other end of the VZ1 is connected with a zero line, a negative electrode of the D2 and a positive electrode of the D3; negative electrodes of the D3 and the D1 are connected with one ends of the R1 and the L1 and a positive electrode of the C1; and positive electrodes of the D4 and the D2 are connected with negative electrodes of the C1 and the C2. The switching power supply circuit of the utility model adopts relatively few electronic components to realize a strong electromagnetic shielding anti-interference function, and the switching power supply circuit also has the advantages of simple structure and high reliability.
Description
Technical field
The utility model relates to power technique fields, particularly relates to a kind of switching power circuit.
Background technology
The application of Switching Power Supply in power electronic equipment is very extensive, and the stability of Switching Power Supply and reliability depend on the quality of electronic component and the reasonability of circuit design to a great extent.Reliable in quality, circuit reasonable in design have long useful life, and have extraordinary energy-saving effect and voltage stabilizing function, and have very strong anti-interference function, shield electromagnetic interference to a great extent.But switching power circuit of the prior art need be provided with more electronic component for anti-electromagnetic interference; This situation both wasted energy; On this non-essential function, and the electronic component that increases improved the cost of Switching Power Supply with Electric Application, and the quantity of the operational reliability of Switching Power Supply and electronic component is closely bound up; Electronic component is many more, and the reliability of switching power circuit is poor more.
The utility model content
The purpose of the utility model is to avoid weak point of the prior art and a kind of switching power circuit is provided, and it adopts less relatively electronic component to realize stronger electromagnetic shielding anti-interference function, and circuit structure is simple and reliability is high.
The purpose of the utility model realizes through following technical measures.
A kind of switching power circuit comprises elementary current rectifying and wave filtering circuit, inverter circuit and secondary commutation filter circuit; Said elementary current rectifying and wave filtering circuit comprises fuse FR1, piezo-resistance VZ1, diode D2, D2, D3, D4, resistance R 1, capacitor C 1, C2, inductance L 1; The termination live wire of FR1; The end of another termination VZ1 of FR1, the positive pole of D1 and the negative pole of D4; The other end connecting to neutral line of VZ1, the negative pole of D2 and the positive pole of D3, the negative pole of D3 and D1 connects the end of R1, L1 and the positive pole of C1, and the positive pole of D4 and D2 connects the negative pole of C1 and C2;
Said inverter circuit comprises the primary coil of resistance R 2, R6, R4, R5, R7, capacitor C 5, C6, C7, C8, transformer T1 and secondary coil T1B, diode D6, D5, integrated circuit U1 and the photoelectric cell U2B of transformer T1; One end of the primary coil of an end, VD signal and the T1 of positive pole, R5 and the C5 of the termination R1 of R2, the other end of L1, C2; The positive pole of the end of another termination R4 of R2, the end of C7, C6, the negative pole of D6 and 2 pin of U1; The other end of another termination C5 of R5, the negative pole of D5; The positive pole of D5 connects the other end of primary coil of 5 pin and 6 pin and the T1 of U1, and 1 pin of another termination U1 of R4,3 pin of U1 connect the base stage of U2B and the end of C8; 4 pin of U1 connect the end of R7; The emitter of U2B connects the end of secondary coil T1B of negative pole and T1 of the other end, the C6 of the other end, the R7 of the other end, the C8 of C7, and the positive pole of D6 connects the end of R6, the other end of the secondary coil T1B of another termination T1 of R6;
Said secondary commutation filter circuit comprises the secondary coil T1A of capacitor C 11, C9, C12, C10, C13, resistance R 11, R12, R10, R9, R16, R19, R13, R14, R15, R17, R18, diode D7, photodiode U2A, voltage-stabiliser tube ZD1, adjustable reference source U3, triode Q2, inductance L 2 and T1; The end of the termination T1A of C11 and the positive pole of D7, the end of another termination R11 of C11, the end of the negative pole of another termination D7 of R11, positive pole, L2 and the R12 of C9; The other end and the ground connection of another termination T1A of C9; The positive pole of another termination U2A of R12 and the end of R10, the end of another termination R9 of U2A and R10, another termination R13 of L2, the end of R19 and the positive pole of C10, the negative pole of ZD1; The end of an end, R14 and the R15 of another termination C12 of R13 and the adjustable side of U3; The end of another termination R16 of R9, the negative pole of U3 and the base stage of Q2, the other end of another termination C12 of R16, the positive pole of U3 connect an end, R14, R15, the other end of R19, the negative pole of C10 and the positive pole of ZD1 of R17, R18; The emitter of Q2 connects the end of C13, the other end and the ground connection of R18, the other end of another termination R17 of C13.
U1 is OB2353.
U3 is TL431.
Preferably, also comprise capacitor C Y1, the termination VD signal of CY1, the other end ground connection of CY1.
U2B is an optocoupler.
The switching power circuit of the utility model, it adopts less relatively electronic component to realize stronger electromagnetic shielding anti-interference function, and circuit structure is simple and reliability is high.
Description of drawings
Utilize accompanying drawing that the utility model is further specified, but the content in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the circuit diagram of an embodiment of the utility model.
Embodiment
In conjunction with following examples the utility model is described further.
Embodiment 1
The switching power circuit of present embodiment is as shown in Figure 1, comprises elementary current rectifying and wave filtering circuit, inverter circuit and secondary commutation filter circuit; Said elementary current rectifying and wave filtering circuit comprises fuse FR1, piezo-resistance VZ1, diode D2, D2, D3, D4, resistance R 1, capacitor C 1, C2, inductance L 1; The termination live wire of FR1; The end of another termination VZ1 of FR1, the positive pole of D1 and the negative pole of D4; The other end connecting to neutral line of VZ1, the negative pole of D2 and the positive pole of D3, the negative pole of D3 and D1 connects the end of R1, L1 and the positive pole of C1, and the positive pole of D4 and D2 connects the negative pole of C1 and C2;
Said inverter circuit comprises the primary coil of resistance R 2, R6, R4, R5, R7, capacitor C 5, C6, C7, C8, transformer T1 and secondary coil T1B, diode D6, D5, integrated circuit U1 and the photoelectric cell U2B of transformer T1; One end of the primary coil of an end, VD signal and the T1 of positive pole, R5 and the C5 of the termination R1 of R2, the other end of L1, C2; The positive pole of the end of another termination R4 of R2, the end of C7, C6, the negative pole of D6 and 2 pin of U1; The other end of another termination C5 of R5, the negative pole of D5; The positive pole of D5 connects the other end of primary coil of 5 pin and 6 pin and the T1 of U1, and 1 pin of another termination U1 of R4,3 pin of U1 connect the base stage of U2B and the end of C8; 4 pin of U1 connect the end of R7; The emitter of U2B connects the end of secondary coil T1B of negative pole and T1 of the other end, the C6 of the other end, the R7 of the other end, the C8 of C7, and the positive pole of D6 connects the end of R6, the other end of the secondary coil T1B of another termination T1 of R6;
Said secondary commutation filter circuit comprises the secondary coil T1A of capacitor C 11, C9, C12, C10, C13, resistance R 11, R12, R10, R9, R16, R19, R13, R14, R15, R17, R18, diode D7, photodiode U2A, voltage-stabiliser tube ZD1, adjustable reference source U3, triode Q2, inductance L 2 and T1; The end of the termination T1A of C11 and the positive pole of D7, the end of another termination R11 of C11, the end of the negative pole of another termination D7 of R11, positive pole, L2 and the R12 of C9; The other end and the ground connection of another termination T1A of C9; The positive pole of another termination U2A of R12 and the end of R10, the end of another termination R9 of U2A and R10, another termination R13 of L2, the end of R19 and the positive pole of C10, the negative pole of ZD1; The end of an end, R14 and the R15 of another termination C12 of R13 and the adjustable side of U3; The end of another termination R16 of R9, the negative pole of U3 and the base stage of Q2, the other end of another termination C12 of R16, the positive pole of U3 connect an end, R14, R15, the other end of R19, the negative pole of C10 and the positive pole of ZD1 of R17, R18; The emitter of Q2 connects the end of C13, the other end and the ground connection of R18, the other end of another termination R17 of C13.
U1 is OB2353.
U3 is TL431.
Present embodiment also comprises capacitor C Y1, the termination VD signal of CY1, the other end ground connection of CY1.
U2B is an optocoupler.
Should be noted that at last; Above embodiment only be used to explain the utility model technical scheme but not to the restriction of the utility model protection range; Although the utility model has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model, and do not break away from the essence and the scope of the utility model technical scheme.
Claims (5)
1. a switching power circuit is characterized in that: comprise elementary current rectifying and wave filtering circuit, inverter circuit and secondary commutation filter circuit; Said elementary current rectifying and wave filtering circuit comprises fuse FR1, piezo-resistance VZ1, diode D2, D2, D3, D4, resistance R 1, capacitor C 1, C2, inductance L 1; The termination live wire of fuse FR1; The end of the other end connecting resistance VZ1 of fuse FR1, the positive pole of diode D1 and the negative pole of diode D4; The other end connecting to neutral line of resistance VZ1, the negative pole of diode D2 and the positive pole of diode D3; The negative pole connecting resistance R1 of diode D3 and D1, an end of inductance L 1 and the positive pole of capacitor C 1, the positive pole of diode D4 and D2 connect the negative pole of capacitor C 1 and C2;
Said inverter circuit comprises the primary coil of resistance R 2, R6, R4, R5, R7, capacitor C 5, C6, C7, C8, transformer T1 and secondary coil T1B, diode D6, D5, integrated circuit U1 and the photoelectric cell U2B of transformer T1; One end of the primary coil of one end, VD signal and the transformer T1 of positive pole, resistance R 5 and the capacitor C 5 of one terminating resistor R1 of resistance R 2, the other end of inductance L 1, capacitor C 2; The positive pole of the end of the other end connecting resistance R4 of resistance R 2, an end of capacitor C 7, capacitor C 6, the negative pole of diode D6 and 2 pin of integrated circuit U1; The other end of another termination capacitor C 5 of resistance R 5, the negative pole of diode D5; The positive pole of diode D5 connects the other end of primary coil of 5 pin and 6 pin and the transformer T1 of integrated circuit U1; 1 pin of another termination integrated circuit U1 of resistance R 4; 3 pin of integrated circuit U1 connect an end of base stage and the capacitor C 8 of photoelectric cell U2B; The end of the 4 pin connecting resistance R7 of integrated circuit U1; The emitter of photoelectric cell U2B connects the end of secondary coil T1B of negative pole and transformer T1 of the other end, the capacitor C 6 of the other end, the resistance R 7 of the other end, the capacitor C 8 of capacitor C 7, the end of the anodal connecting resistance R6 of diode D6, the other end of the secondary coil T1B of another termination transformer T1 of resistance R 6;
Said secondary commutation filter circuit comprises the secondary coil T1A of capacitor C 11, C9, C12, C10, C13, resistance R 11, R12, R10, R9, R16, R19, R13, R14, R15, R17, R18, diode D7, photodiode U2A, voltage-stabiliser tube ZD1, adjustable reference source U3, triode Q2, inductance L 2 and transformer T1; The end of the secondary coil T1A of one termination transformer T1 of capacitor C 11 and the positive pole of diode D7; The end of the other end connecting resistance R11 of capacitor C 11; One end of the negative pole of another terminating diode D7 of resistance R 11, positive pole, inductance L 2 and the resistance R 12 of capacitor C 9; The other end and the ground connection of the secondary coil T1A of another termination transformer T1 of capacitor C 9; The positive pole of another termination photodiode U2A of resistance R 12 and an end of resistance R 10; The end of the other end connecting resistance R9 of photodiode U2A and resistance R 10; The other end connecting resistance R13 of inductance L 2, an end of resistance R 19 and the positive pole of capacitor C 10, the negative pole of voltage-stabiliser tube ZD1, the adjustable side of an end of an end of another termination capacitor C 12 of resistance R 13, resistance R 14 and resistance R 15 and adjustable reference source U3, the end of the other end connecting resistance R16 of resistance R 9, the negative pole of adjustable reference source U3 and the base stage of triode Q2; The other end of another termination capacitor C 12 of resistance R 16; The other end of the anodal connecting resistance R17 of adjustable reference source U3, an end of resistance R 18, resistance R 14, resistance R 15, resistance R 19, the negative pole of capacitor C 10 and the positive pole of voltage-stabiliser tube ZD1, the emitter of triode Q2 connects an end of capacitor C 13, the other end and the ground connection of resistance R 18, the other end of the other end connecting resistance R17 of capacitor C 13.
2. switching power circuit according to claim 1 is characterized in that: integrated circuit U1 is OB2353.
3. switching power circuit according to claim 1 is characterized in that: adjustable reference source U3 is TL431.
4. switching power circuit according to claim 1 is characterized in that: also comprise capacitor C Y1, the termination VD signal of capacitor C Y1, the other end ground connection of capacitor C Y1.
5. switching power circuit according to claim 1 is characterized in that: photoelectric cell U2B is an optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202283308U CN202197214U (en) | 2011-07-01 | 2011-07-01 | Switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202283308U CN202197214U (en) | 2011-07-01 | 2011-07-01 | Switching power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202197214U true CN202197214U (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202283308U Expired - Fee Related CN202197214U (en) | 2011-07-01 | 2011-07-01 | Switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202197214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655787A (en) * | 2016-11-28 | 2017-05-10 | 北京无线电测量研究所 | Voltage conversion array plane power supply circuit |
| CN107071966A (en) * | 2017-03-13 | 2017-08-18 | 深圳盈特创智能科技有限公司 | A kind of LED light adjusting system |
-
2011
- 2011-07-01 CN CN2011202283308U patent/CN202197214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655787A (en) * | 2016-11-28 | 2017-05-10 | 北京无线电测量研究所 | Voltage conversion array plane power supply circuit |
| CN107071966A (en) * | 2017-03-13 | 2017-08-18 | 深圳盈特创智能科技有限公司 | A kind of LED light adjusting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20190701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |