CN202840966U - Power supply auxiliary circuit - Google Patents
Power supply auxiliary circuit Download PDFInfo
- Publication number
- CN202840966U CN202840966U CN 201220435013 CN201220435013U CN202840966U CN 202840966 U CN202840966 U CN 202840966U CN 201220435013 CN201220435013 CN 201220435013 CN 201220435013 U CN201220435013 U CN 201220435013U CN 202840966 U CN202840966 U CN 202840966U
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- power supply
- triode
- transformer
- auxiliary circuit
- diode
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Abstract
The utility model relates to a power supply auxiliary circuit. The power supply auxiliary circuit is characterized in that a bus power supply is connected with the collector electrode of a triode VT2 and the base electrode of a diode VT1; the bus power supply is further connected with the collector electrode of the diode VT1 through a resistor R2 and also connected with one end of a primary winding 1 of a transformer. The other end of the primary winding 1 of the transformer is connected with the collector electrode of the diode VT1. The emitter electrode of the triode VT1 is connected with the base electrode of the triode VT2 and further connected with the emitter electrode of the triode VT2. The negative electrode end of a voltage stabilizing diode DZ is connected with the base electrode of the triode VT2 while the positive electrode end is connected with one end of a primary winding 2 and further grounded. The bus power supply is serially connected with a capacitor through a resistor R5 and further connected with the other end of the primary winding 2 of the transformer. By making use of the switching effects and the circuit voltage stabilization protection effects of the triodes and the voltage stabilization and polarity protection effects of the diodes, the power supply auxiliary circuit achieves a control on the starting of an auxiliary power supply. Furthermore, the power supply auxiliary circuit is simple and has a small number of components.
Description
Technical field
The utility model relates to a kind of circuit, relates in particular to a kind of power supply auxiliary circuit.
Background technology
General Switching Power Supply all will have an accessory power supply, provides control, protection, driving and display circuit that energy is provided, and the startup of Switching Power Supply at first should start accessory power supply.The power output of accessory power supply is to consume, and does not participate in Energy Transfer, directly affects the efficient of Switching Power Supply, therefore, requires auxiliary power start reliable, and efficient is high, control easily and cost low.The major defect of existing accessory power supply power supply plan is to need the multiple power sources conversion chip, needs to be familiar with various conversion chips, or needs with special-purpose PDM keyer, and device is many, and design comparison is complicated, and system cost is higher.
Summary of the invention
The purpose of this utility model is exactly in order to overcome the above problems, and a kind of switching power circuit that contains accessory power supply is provided, and makes it simple in structure, and efficient is high, cost is low.
The technical scheme that the utility model provides is:
Power supply auxiliary circuit, the collector electrode of the direct connecting triode VT2 of bus power supply and the base stage of triode VT1, the bus power supply also passes through the collector electrode of resistance R 2 connecting triode VT1, the bus power supply is direct terminals of the former limit of connection transformer winding 1 also, the collector electrode of the other end connecting triode VT1 of transformer primary side winding 1, the base stage of triode VT1 emitter connecting triode VT2, the emitter of triode VT1 emitter connecting triode VT2, the base stage of the negative pole end connecting triode VT2 of voltage stabilizing didoe DZ, one end of the former limit of the anodal connection transformer winding 2 of voltage stabilizing didoe DZ is ground connection simultaneously, and the bus power supply is by the other end of the former limit of resistance R 5 series capacitance C2 connection transformers winding 2.
Concrete, the output of capacitor C 2 also is connected with the negative pole of diode D1, the plus earth of diode D1.
Concrete, an end of the transformer primary side winding 2 of the positive pole of described connection voltage stabilizing didoe DZ also is connected in series a capacitor C 1, the other end ground connection of capacitor C 1.
Concrete, described transformer is three-winding transformer.
Technique effect of the present utility model is: switch and the voltage stabilizing of the effect of circuit voltage-stabilizing protection and diode and the advantage of polarity protection that this uses novel abundant utilization triode reach auxiliary power start control.Circuit is simple, and components and parts are few.
Description of drawings
Fig. 1 is the novel electrical block diagram of this use.
Embodiment
Power supply auxiliary circuit is made of transformer, triode VT1, triode VT2, diode D1, diode D2, voltage stabilizing didoe DZ, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6 and capacitor C 1, capacitor C 2.Transformer is three-winding transformer.
The bus power supply by resistance R 1 connecting triode VT2 collector electrode and the base stage of triode VT1, the bus power supply is gone back the collector electrode of connecting triode VT1 by resistance R 2, the bus power supply is direct terminals of the former limit of connection transformer winding 1 also.The collector electrode of the other end connecting triode VT1 of transformer primary side winding 1.Triode VT1 emitter is by the base stage of resistance R 3 connecting triode VT2, and triode VT1 emitter is by the emitter of resistance R 4 connecting triode VT2.The base stage of the negative pole end connecting triode VT2 of voltage stabilizing didoe DZ, an end of the former limit of the anodal connection transformer winding 2 of voltage stabilizing didoe DZ are simultaneously by resistance R 6 ground connection.
The bus power supply is by the other end of the former limit of resistance R 5 series capacitance C1 connection transformers winding 2.Connect capacitor C 2 and also be connected with diode D1, the negative pole of diode D1 connects the output of capacitor C 2, the plus earth of diode D1.One end of the transformer primary side winding 2 of the positive pole of described connection voltage stabilizing didoe DZ also is connected in series a capacitor C 1, the other end ground connection of capacitor C 1.
Switch and the voltage stabilizing of the effect of circuit voltage-stabilizing protection and diode and the advantage of polarity protection that this uses novel abundant utilization triode reach auxiliary power start control.
Claims (4)
1. power supply auxiliary circuit, it is characterized in that, the collector electrode of the direct connecting triode VT2 of bus power supply and the base stage of triode VT1, the bus power supply also passes through the collector electrode of resistance R 2 connecting triode VT1, the bus power supply is direct terminals of the former limit of connection transformer winding 1 also, the collector electrode of the other end connecting triode VT1 of transformer primary side winding 1, the base stage of triode VT1 emitter connecting triode VT2, the emitter of triode VT1 emitter connecting triode VT2, the base stage of the negative pole end connecting triode VT2 of voltage stabilizing didoe DZ, one end of the former limit of the anodal connection transformer winding 2 of voltage stabilizing didoe DZ is ground connection simultaneously, and the bus power supply is by the other end of the former limit of resistance R 5 series capacitance C2 connection transformers winding 2.
2. power supply auxiliary circuit as claimed in claim 1 is characterized in that, the output of capacitor C 2 also is connected with the negative pole of diode D1, the plus earth of diode D1.
3. power supply auxiliary circuit as claimed in claim 1 is characterized in that, an end of the transformer primary side winding 2 of the positive pole of described connection voltage stabilizing didoe DZ also is connected in series a capacitor C 1, the other end ground connection of capacitor C 1.
4. power supply auxiliary circuit as claimed in claim 1 is characterized in that, described transformer is three-winding transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435013 CN202840966U (en) | 2012-08-30 | 2012-08-30 | Power supply auxiliary circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435013 CN202840966U (en) | 2012-08-30 | 2012-08-30 | Power supply auxiliary circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840966U true CN202840966U (en) | 2013-03-27 |
Family
ID=47952564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220435013 Expired - Fee Related CN202840966U (en) | 2012-08-30 | 2012-08-30 | Power supply auxiliary circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202840966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472879A (en) * | 2013-09-10 | 2013-12-25 | 昆山新金福精密电子有限公司 | Voltage-stabilized power circuit |
| CN105245106A (en) * | 2015-10-08 | 2016-01-13 | 深圳九星智能航空科技有限公司 | Voltage stabilization power circuit of unmanned aerial vehicle |
-
2012
- 2012-08-30 CN CN 201220435013 patent/CN202840966U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472879A (en) * | 2013-09-10 | 2013-12-25 | 昆山新金福精密电子有限公司 | Voltage-stabilized power circuit |
| CN105245106A (en) * | 2015-10-08 | 2016-01-13 | 深圳九星智能航空科技有限公司 | Voltage stabilization power circuit of unmanned aerial vehicle |
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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: 20130327 Termination date: 20140830 |
|
| EXPY | Termination of patent right or utility model |