CN205212517U - Power fast switch over circuit - Google Patents
Power fast switch over circuit Download PDFInfo
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- CN205212517U CN205212517U CN201520965957.XU CN201520965957U CN205212517U CN 205212517 U CN205212517 U CN 205212517U CN 201520965957 U CN201520965957 U CN 201520965957U CN 205212517 U CN205212517 U CN 205212517U
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- diode
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Abstract
The utility model discloses a power fast switch over circuit, including transformer T, rectifier bridge Q, relay K, resistance R1, group battery E, photo resistance RV and emitting diode D1, transformer T coil L1 connects 220V alternating current both ends respectively in both ends, transformer T coil L2 one end is connecting resistance R1 and rectifier bridge Q pin 1 respectively, the emitting diode D1 negative pole and the transformer T coil L2 other end are connected respectively to rectifier bridge Q pin 3, the anodal connecting resistance R1 other end of emitting diode D1, electric capacity C1 is connected respectively to rectifier bridge Q pin 2, photo resistance RV, relay K coil, diode D2 negative pole and diode D6 are anodal, diode D6 negative pole is connecting resistance R2 respectively, relay K contact K -2 pin 3, diode D5 negative pole and resistance R3. The utility model discloses power fast switch over circuit passes through the whole circuit of the relay sole contactor control of control, and circuit structure is simple, and is with low costs, small, and stability is high, and switching speed is fast.
Description
Technical field
The utility model relates to a kind of commutation circuit, specifically a kind of quick power switching circuit.
Background technology
Some special occasions need to use power supply switch circuit to power, once primary power source de-energizes, need to be switched to stand-by power supply fast, such as, emergency light in fire fighting passageway, single-chip microcomputer etc., not only in order to normal Working Life, and the damage that can prevent unexpected power-off from causing this kind equipment, but very automatic switch-over circuit is all that employing multiple contact of Control controls at present, although control logic is simple, but multiple contact adds the volume of circuit, and multiple contact adds a lot of destabilizing factor to circuit, stability is reduced greatly, response speed is slow, the not power-off demand of a lot of precision element can not be met, and anti-interference is poor, thus have impact on its performance.
Utility model content
The purpose of this utility model is to provide a kind of quick power switching circuit, 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 quick power switching circuit, comprise transformer T, rectifier bridge Q, relay K, resistance R1, battery pack E, photo resistance RV and light-emitting diode D1, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end is contact resistance R1 and rectifier bridge Q pin 1 respectively, rectifier bridge Q pin 3 is connecting luminous diode D1 negative pole and the transformer T coil L2 other end respectively, the light-emitting diode D1 positive pole contact resistance R1 other end, rectifier bridge Q pin 2 connects electric capacity C1 respectively, photo resistance RV, relay K coil, diode D2 negative pole and diode D6 positive pole, diode D6 negative pole is contact resistance R2 respectively, relay K contact K-2 pin 3, diode D5 negative pole and resistance R3, the resistance R2 other end connects diode D4 negative pole and relay K contact K-2 pin 2 respectively, resistance R3 other end connecting luminous diode D3 positive pole, relay K contact K-2 pin 1 connects load one end, described diode D5 positive pole connects battery pack E positive pole, the described relay K coil other end connects diode D2 positive pole and triode VT1 collector electrode respectively, triode VT1 base stage connects potentiometer RP1 one end and potentiometer RP1 slide plate respectively, the potentiometer RP1 other end connects the photo resistance RV other end, described rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, triode VT1 emitter, battery pack E negative pole, light-emitting diode D3 negative pole, diode D4 positive pole and the load other end ground connection.
As further program of the utility model: described battery pack E is batteries.
As the utility model further scheme: described diode D2 is voltage stabilizing didoe.
Compared with prior art, the beneficial effects of the utility model are: the utility model quick power switching circuit controls whole circuit by the contact that Control is unique, and circuit structure is simple, and cost is low, and volume is little, and stability is high, and switch speed is fast.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of quick power switching 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 quick power switching circuit, comprise transformer T, rectifier bridge Q, relay K, resistance R1, battery pack E, photo resistance RV and light-emitting diode D1, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end is contact resistance R1 and rectifier bridge Q pin 1 respectively, rectifier bridge Q pin 3 is connecting luminous diode D1 negative pole and the transformer T coil L2 other end respectively, the light-emitting diode D1 positive pole contact resistance R1 other end, rectifier bridge Q pin 2 connects electric capacity C1 respectively, photo resistance RV, relay K coil, diode D2 negative pole and diode D6 positive pole, diode D6 negative pole is contact resistance R2 respectively, relay K contact K-2 pin 3, diode D5 negative pole and resistance R3, the resistance R2 other end connects diode D4 negative pole and relay K contact K-2 pin 2 respectively, resistance R3 other end connecting luminous diode D3 positive pole, relay K contact K-2 pin 1 connects load one end, described diode D5 positive pole connects battery pack E positive pole, the described relay K coil other end connects diode D2 positive pole and triode VT1 collector electrode respectively, triode VT1 base stage connects potentiometer RP1 one end and potentiometer RP1 slide plate respectively, the potentiometer RP1 other end connects the photo resistance RV other end, described rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, triode VT1 emitter, battery pack E negative pole, light-emitting diode D3 negative pole, diode D4 positive pole and the load other end ground connection, described battery pack E is batteries, described diode D2 is voltage stabilizing didoe.
Operation principle of the present utility model is: refer to Fig. 1, and during 220V alternating current normal power supply, load normally works, and power supply is battery pack E charging; When 220V AC outage, light-emitting diode D1 extinguishes at once, photo resistance RV is unglazed photograph, its resistance rises rapidly, inflow triode VT1 base current is reduced thereupon, triode VT1 collector current also declines thereupon, by arranging the parameter of associated electronic components, collector current is now made to be less than the minimum operate current of relay K, K discharges, and relay K contact K-2 pin 1 is connected with pin 3, and now battery pack E is load supplying, when 220V alternating current recovers, circuit returns to initial condition again.
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 quick power switching circuit, comprises transformer T, rectifier bridge Q, relay K, resistance R1, battery pack E, photo resistance RV and light-emitting diode D1, it is characterized in that, described transformer T coil L1 two ends connect 220V alternating current two ends respectively, transformer T coil L2 one end is contact resistance R1 and rectifier bridge Q pin 1 respectively, rectifier bridge Q pin 3 is connecting luminous diode D1 negative pole and the transformer T coil L2 other end respectively, the light-emitting diode D1 positive pole contact resistance R1 other end, rectifier bridge Q pin 2 connects electric capacity C1 respectively, photo resistance RV, relay K coil, diode D2 negative pole and diode D6 positive pole, diode D6 negative pole is contact resistance R2 respectively, battery pack E positive pole, relay K contact K-2 pin 3 and resistance R3, the resistance R2 other end connects diode D4 negative pole and relay K contact K-2 pin 2 respectively, resistance R3 other end connecting luminous diode D3 positive pole, relay K contact K-2 pin 1 connects load one end, the described relay K coil other end connects diode D2 positive pole and triode VT1 collector electrode respectively, triode VT1 base stage connects potentiometer RP1 one end and potentiometer RP1 slide plate respectively, the potentiometer RP1 other end connects the photo resistance RV other end, and described rectifier bridge Q pin 4 connects the electric capacity C1 other end respectively, triode VT1 emitter, battery pack E negative pole, light-emitting diode D3 negative pole, diode D4 positive pole and the load other end ground connection.
2. quick power switching circuit according to claim 1, is characterized in that, described battery pack E is batteries.
3. quick power switching circuit according to claim 1, is characterized in that, described diode D2 is voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520965957.XU CN205212517U (en) | 2015-11-30 | 2015-11-30 | Power fast switch over circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520965957.XU CN205212517U (en) | 2015-11-30 | 2015-11-30 | Power fast switch over circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205212517U true CN205212517U (en) | 2016-05-04 |
Family
ID=55850208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520965957.XU Expired - Fee Related CN205212517U (en) | 2015-11-30 | 2015-11-30 | Power fast switch over circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205212517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505725A (en) * | 2016-12-16 | 2017-03-15 | 崔慧芳 | Power source automatic switching system and automatic switching method |
-
2015
- 2015-11-30 CN CN201520965957.XU patent/CN205212517U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505725A (en) * | 2016-12-16 | 2017-03-15 | 崔慧芳 | Power source automatic switching system and automatic switching method |
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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: 20160504 Termination date: 20161130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |