CN204669242U - A kind of power circuit - Google Patents
A kind of power circuit Download PDFInfo
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- CN204669242U CN204669242U CN201520407701.7U CN201520407701U CN204669242U CN 204669242 U CN204669242 U CN 204669242U CN 201520407701 U CN201520407701 U CN 201520407701U CN 204669242 U CN204669242 U CN 204669242U
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Abstract
The utility model discloses a kind of power circuit, comprise rectifier bridge Q, triode VT1, resistance R1, diode D1, electric capacity C1, light-emitting diode D6, transformer T and optocoupler U1, rectifier bridge Q pin 1 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 3, and rectifier bridge Q pin 2 connects electric capacity C1, resistance R1, electric capacity C2, resistance R2, diode D7 positive pole and transformer T coil L1 respectively.The utility model circuit construction of electric power is simple, voltage regulation result is good, when civil power and other reasons cause voltage fluctuation, the output end vo voltage that makes that can be very fast keeps stable, add diode D7 and diode D8 in addition, the peak voltage clamper that transformer T coil can be produced because of leakage inductance, to safety value, improves circuit safety, is applicable to promoting the use of.
Description
Technical field
The utility model relates to a kind of power supply, specifically a kind of power circuit.
Background technology
Switching Power Supply is described as energy-efficient power supply, it is the more satisfactory product under modern promotion environmental protection, it represents the developing direction of stabilized voltage power supply, now become the main product of stabilized voltage power supply, the inner key components of Switching Power Supply is operated in HF switch state, consumed energy own is very low, and power-efficient can reach 70% ~ 90%, improves nearly one times than normal linear stabilized voltage power supply.Switching Power Supply is also known as the power supply of no industrial frequency transformer, it be utilize the very little high frequency transformer of volume to realize voltage transformation and electrical network isolation, heavy Industrial Frequency Transformer can not only be removed, also can adopt filter element and the radiator of small volume, because the fluctuation of line voltage exists all the time, little, the lightweight Switching Power Supply of research and development high efficiency, high stability, volume becomes the direction of people's research.
Utility model content
The purpose of this utility model is to provide the power circuit that a kind of stability is high, cost is low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of power circuit, comprises rectifier bridge Q, triode VT1, resistance R1, diode D1, electric capacity C1, light-emitting diode D6, transformer T and optocoupler U1, described rectifier bridge Q pin 1 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 3, and rectifier bridge Q pin 2 connects electric capacity C1 respectively, resistance R1, electric capacity C2, resistance R2, diode D7 positive pole and transformer T coil L1, diode D7 negative pole connects ground connection diode D8 negative pole, the described electric capacity C2 other end is the contact resistance R2 other end and diode D1 positive pole respectively, diode D1 negative pole is the connection transformer T coil L1 other end and triode VT2 collector electrode respectively, and triode VT2 base stage is the contact resistance R1 other end respectively, resistance R3 and triode VT1 collector electrode, triode VT1 emitter connects rectifier bridge Q pin 4 respectively, the electric capacity C1 other end, resistance R5, diode D2 positive pole and electric capacity C5, the electric capacity C5 other end connects optocoupler U1 pin 1 and transformer T coil L3 respectively, the transformer T coil L3 other end connects diode D2 negative pole and electric capacity C4 respectively, the electric capacity C4 other end contact resistance R3 other end, the described resistance K5 other end is contact resistance R4 and triode VT2 emitter respectively, the resistance R4 other end is connecting triode VT1 base stage and optocoupler U1 pin 4, optocoupler U1 pin 3 contact resistance R9 respectively respectively, resistance R8, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D3 positive pole, and diode D3 negative pole connects the electric capacity C3 other end respectively, triode VT3 emitter and resistance R6, triode VT3 collector electrode connecting luminous diode D6 positive pole, the light-emitting diode D6 negative pole contact resistance R8 other end, described triode VT3 base stage contact resistance R7, the resistance R7 other end is the contact resistance R6 other end respectively, diode D5 negative pole, light-emitting diode D4 positive pole and output end vo, described diode D5 positive pole connects optocoupler U1 pin 2.
As further program of the utility model: described optocoupler U1 model is 4N25.
As the utility model further scheme: described diode D8 is voltage stabilizing didoe.
Compared with prior art, the beneficial effects of the utility model are: the utility model power circuit circuit structure is simple, voltage regulation result is good, when civil power and other reasons cause voltage fluctuation, output end vo voltage very fast can be made to keep stable, add diode D7 and diode D8 in addition, the peak voltage clamper that transformer T coil can be produced because of leakage inductance is to safety value, improve circuit safety, be applicable to promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of power circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of power circuit, comprises rectifier bridge Q, triode VT1, resistance R1, diode D1, electric capacity C1, light-emitting diode D6, transformer T and optocoupler U1, rectifier bridge Q pin 1 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 3, and rectifier bridge Q pin 2 connects electric capacity C1 respectively, resistance R1, electric capacity C2, resistance R2, diode D7 positive pole and transformer T coil L1, diode D7 negative pole connects ground connection diode D8 negative pole, the electric capacity C2 other end is the contact resistance R2 other end and diode D1 positive pole respectively, diode D1 negative pole is the connection transformer T coil L1 other end and triode VT2 collector electrode respectively, and triode VT2 base stage is the contact resistance R1 other end respectively, resistance R3 and triode VT1 collector electrode, triode VT1 emitter connects rectifier bridge Q pin 4 respectively, the electric capacity C1 other end, resistance R5, diode D2 positive pole and electric capacity C5, the electric capacity C5 other end connects optocoupler U1 pin 1 and transformer T coil L3 respectively, the transformer T coil L3 other end connects diode D2 negative pole and electric capacity C4 respectively, the electric capacity C4 other end contact resistance R3 other end, the resistance R5 other end is contact resistance R4 and triode VT2 emitter respectively, the resistance R4 other end is connecting triode VT1 base stage and optocoupler U1 pin 4, optocoupler U1 pin 3 contact resistance R9 respectively respectively, resistance R8, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D3 positive pole, and diode D3 negative pole connects the electric capacity C3 other end respectively, triode VT3 emitter and resistance R6, triode VT3 collector electrode connecting luminous diode D6 positive pole, the light-emitting diode D6 negative pole contact resistance R8 other end, triode VT3 base stage contact resistance R7, the resistance R7 other end is the contact resistance R6 other end respectively, diode D5 negative pole, light-emitting diode D4 positive pole and output end vo, diode D5 positive pole connects optocoupler U1 pin 2.
Optocoupler U1 model is 4N25.
Diode D8 is voltage stabilizing didoe.
Operation principle of the present utility model is: refer to Fig. 1, after plugging civil power, 220V alternating current is via rectifier bridge Q, electric capacity C1 carries out rectifying and wave-filtering, and on electric capacity C1, produce the direct voltage of about 300V, this voltage adds to the base stage of generator triode VT2 through starting resistance R1, triode VT2 is obtained be biased and conducting, by diode D2, electric capacity C4, the inductive impulse that pulse transformer T coil L3 feeds back on winding is fed to triode VT2 base stage by the self-excitation feedback capture that the elements such as resistance R3 are formed, it is made to be maintained at the working condition of continuous oscillation, simultaneously, the induced voltage that transformer T coil L2 occurs is via diode D3, electric capacity C3 rectifying and wave-filtering, form the VD a little more than 5V, via the direct voltage of resistance R6 from output end vo stable output.
The elements such as resistance R4, resistance R5, triode VT1 and optocoupler U1 form reaction type voltage active accommodation circuit, when civil power 220V alternating current fluctuation voltage raises, the emitter of generator triode VT2 connects feedback resistance R5 pressure drop to be reduced, and this pressure drop adds to triode VT1 base stage via resistance R5, the conducting degree of triode VT1 also can reduce, and reaches active accommodation.Otherwise if civil power 220V alternating voltage reduces, active feedback Circuit tuning can adjust towards contrary target object, allows output end vo voltage remain unchanged.
If meeting other reasons another causes output voltage to raise, now the diode D5 of output circuit end then can puncture because of overtension, and make optocoupler U1 output conducting resistance respond reduction, thus to strengthen on feedback capacity C5 voltage to the feedback of triode VT1, the situation of adjustment oscillating circuit initiatively, with to output end vo voltage stabilization.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a power circuit, comprises rectifier bridge Q, triode VT1, resistance R1, diode D1, electric capacity C1, light-emitting diode D6, transformer T and optocoupler U1, is characterized in that, described rectifier bridge Q pin 1 is connected 220V alternating current two ends respectively with rectifier bridge Q pin 3, and rectifier bridge Q pin 2 connects electric capacity C1 respectively, resistance R1, electric capacity C2, resistance R2, diode D7 positive pole and transformer T coil L1, diode D7 negative pole connects ground connection diode D8 negative pole, the described electric capacity C2 other end is the contact resistance R2 other end and diode D1 positive pole respectively, diode D1 negative pole is the connection transformer T coil L1 other end and triode VT2 collector electrode respectively, and triode VT2 base stage is the contact resistance R1 other end respectively, resistance R3 and triode VT1 collector electrode, triode VT1 emitter connects rectifier bridge Q pin 4 respectively, the electric capacity C1 other end, resistance R5, diode D2 positive pole and electric capacity C5, the electric capacity C5 other end connects optocoupler U1 pin 1 and transformer T coil L3 respectively, the transformer T coil L3 other end connects diode D2 negative pole and electric capacity C4 respectively, the electric capacity C4 other end contact resistance R3 other end, the described resistance R5 other end is contact resistance R4 and triode VT2 emitter respectively, the resistance R4 other end is connecting triode VT1 base stage and optocoupler U1 pin 4, optocoupler U1 pin 3 contact resistance R9 respectively respectively, resistance R8, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D3 positive pole, and diode D3 negative pole connects the electric capacity C3 other end respectively, triode VT3 emitter and resistance R6, triode VT3 collector electrode connecting luminous diode D6 positive pole, the light-emitting diode D6 negative pole contact resistance R8 other end, described triode VT3 base stage contact resistance R7, the resistance R7 other end is the contact resistance R6 other end respectively, diode D5 negative pole, light-emitting diode D4 positive pole and output end vo, described diode D5 positive pole connects optocoupler U1 pin 2.
2. power circuit according to claim 1, is characterized in that, described optocoupler U1 model is 4N25.
3. power circuit according to claim 1, is characterized in that, described diode D8 is voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407701.7U CN204669242U (en) | 2015-06-15 | 2015-06-15 | A kind of power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407701.7U CN204669242U (en) | 2015-06-15 | 2015-06-15 | A kind of power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204669242U true CN204669242U (en) | 2015-09-23 |
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| CN201520407701.7U Active CN204669242U (en) | 2015-06-15 | 2015-06-15 | A kind of power circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255960A (en) * | 2017-06-14 | 2017-10-17 | 郑州永泰澳新商贸有限公司 | A kind of city sprinkling truck intelligent water sprinkling control system |
| CN107553498A (en) * | 2017-10-21 | 2018-01-09 | 河南寰球航空装备科技有限公司 | A kind of fire robot control system |
| CN114333198A (en) * | 2022-01-14 | 2022-04-12 | 深圳市顺安居智能科技有限公司 | New generation industrial grade electron tension rail based on industry intelligence |
-
2015
- 2015-06-15 CN CN201520407701.7U patent/CN204669242U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255960A (en) * | 2017-06-14 | 2017-10-17 | 郑州永泰澳新商贸有限公司 | A kind of city sprinkling truck intelligent water sprinkling control system |
| CN107553498A (en) * | 2017-10-21 | 2018-01-09 | 河南寰球航空装备科技有限公司 | A kind of fire robot control system |
| CN114333198A (en) * | 2022-01-14 | 2022-04-12 | 深圳市顺安居智能科技有限公司 | New generation industrial grade electron tension rail based on industry intelligence |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170105 Address after: City Economic Development Zone West Road 246003 Anhui city of Yicheng province to the north, Qingge Avenue East Patentee after: Anhui Giti Battery Co. Address before: Dragon Street dragon road in Longgang District of Shenzhen City, West Village, Guangdong province 518000 building 7 Patentee before: SHENZHEN YI JIA TONG TECHNOLOGY CO., LTD. |