CN204464969U - A kind of AC power load protection circuit - Google Patents
A kind of AC power load protection circuit Download PDFInfo
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- CN204464969U CN204464969U CN201520232767.7U CN201520232767U CN204464969U CN 204464969 U CN204464969 U CN 204464969U CN 201520232767 U CN201520232767 U CN 201520232767U CN 204464969 U CN204464969 U CN 204464969U
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Abstract
The utility model discloses a kind of AC power load protection circuit; comprise rectifier bridge Q, resistance R1, electric capacity C1, potentiometer RP1, chip U1 and chip U2; the utility model AC power load protection circuit can by potentiometer RP1 and potentiometer RP2 adjustment doors voltage limit and under-voltage point when changing load; thus protection payload security; adapt to various power consumption equipment, structure is simple, function-stable; cheap, be applicable to promoting the use of.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of AC power load protection circuit.
Background technology
Along with the development of science and technology; various power consumption equipment all appears in daily life; but; distinct device have difference more or less with electric standard; exportable high-quality power supply when AC power is normal; but when occurring abnormal; the situations such as DC component is large, half-wave, phase shortage, momentary surges will be there is; the direct fail safe affecting load, and existing power protecting circuit common configuration is complicated, cost is high; and be generally all for a kind of load design; the scope of application is little, and performance is stable not, and it is unreliable to protect.
Utility model content
The purpose of this utility model is the AC power load protection circuit providing a kind of structure simple and safe and reliable, 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 AC power load protection circuit, comprise rectifier bridge Q, resistance R1, electric capacity C1, potentiometer RP1, chip U1 and chip U2, described rectifier bridge Q pin 1 is connected AC power two ends respectively with pin 3, rectifier bridge Q pin 4 connects relay K contact switch K-1, the contact switch K-1 other end is connecting luminous diode D1 negative pole respectively, electric capacity C1, diode D3 positive pole, electric capacity C2 and negative pole of output end, described rectifier bridge Q pin 2 is contact resistance R5 and diode D2 positive pole respectively, resistance R5 other end connecting luminous diode D1 positive pole, diode D2 negative pole is contact resistance R6 respectively, resistance R2, resistance R3 and the electric capacity C1 other end, the resistance R6 other end connects diode D3 negative pole respectively, the electric capacity C2 other end, output head anode and resistance R4, the resistance R4 other end connects ground connection diode D9 negative pole and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 13, chip U1 pin 12 connects potentiometer RP1 respectively, potentiometer RP1 slide plate and the resistance R2 other end, potentiometer RP1 other end ground connection, the described resistance R3 other end connects power supply VCC respectively, chip U2 pin 1, resistance R10, potentiometer RP2 and potentiometer RP2 slide plate, potentiometer RP2 other end ground connection, the described resistance R10 other end connects chip U2 pin 5 and chip U2 pin 6 respectively, chip U2 pin 2 ground connection, chip U2 pin 4 is contact resistance R8 and diode D6 positive pole respectively, the resistance R8 other end connects ground connection light-emitting diode D5 positive pole, described diode D6 negative pole connects diode D8 negative pole and resistance R9 respectively, resistance R9 other end connecting triode VT1 base stage, triode VT1 grounded emitter, triode VT1 collector electrode connects relay K coil and diode D4 positive pole respectively, diode D4 negative pole connects the relay K coil other end and power supply VCC respectively, described diode D8 positive pole is contact resistance R7 and chip U1 pin 14 respectively, the resistance R7 other end connects ground connection diode D7 positive pole.
As further program of the utility model: described chip U1 model is LM124.
As further program of the utility model: described chip U2 model is CD4011.
As the utility model further scheme: described power supply VCC voltage is 12V.
Compared with prior art; the beneficial effects of the utility model are: the utility model AC power load protection circuit can by potentiometer RP1 and potentiometer RP2 adjustment doors voltage limit and under-voltage point when changing load; thus protection payload security; adapt to various power consumption equipment; structure is simple; function-stable, cheap, be applicable to promoting the use of.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of AC power load protection 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 AC power load protection circuit, comprise rectifier bridge Q, resistance R1, electric capacity C1, potentiometer RP1, chip U1 and chip U2, rectifier bridge Q pin 1 is connected AC power two ends respectively with pin 3, rectifier bridge Q pin 4 connects relay K contact switch K-1, the contact switch K-1 other end is connecting luminous diode D1 negative pole respectively, electric capacity C1, diode D3 positive pole, electric capacity C2 and negative pole of output end, rectifier bridge Q pin 2 is contact resistance R5 and diode D2 positive pole respectively, resistance R5 other end connecting luminous diode D1 positive pole, diode D2 negative pole is contact resistance R6 respectively, resistance R2, resistance R3 and the electric capacity C1 other end, the resistance R6 other end connects diode D3 negative pole respectively, the electric capacity C2 other end, output head anode and resistance R4, the resistance R4 other end connects ground connection diode D9 negative pole and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 13, chip U1 pin 12 connects potentiometer RP1 respectively, potentiometer RP1 slide plate and the resistance R2 other end, potentiometer RP1 other end ground connection, the resistance R3 other end connects power supply VCC respectively, chip U2 pin 1, resistance R10, potentiometer RP2 and potentiometer RP2 slide plate, potentiometer RP2 other end ground connection, the resistance R10 other end connects chip U2 pin 5 and chip U2 pin 6 respectively, chip U2 pin 2 ground connection, chip U2 pin 4 is contact resistance R8 and diode D6 positive pole respectively, the resistance R8 other end connects ground connection light-emitting diode D5 positive pole, diode D6 negative pole connects diode D8 negative pole and resistance R9 respectively, resistance R9 other end connecting triode VT1 base stage, triode VT1 grounded emitter, triode VT1 collector electrode connects relay K coil and diode D4 positive pole respectively, diode D4 negative pole connects the relay K coil other end and power supply VCC respectively, diode D8 positive pole is contact resistance R7 and chip U1 pin 14 respectively, the resistance R7 other end connects ground connection diode D7 positive pole.
Chip U1 model is LM124.
Chip U2 model is CD4011.
Power supply VCC voltage is 12V.
Operation principle of the present utility model is: when AC supply voltage exceedes certain set point, and chip U1 pin 14 exports high level, triode VT1 conducting, relay K adhesive, the power supply of its contact switch K-1 cut-out electric loading, light-emitting diode D7 is bright, and overvoltage thresholding is regulated by potentiometer RP1, when AC supply voltage is lower than set point, chip U2 pin 4 exports high level, triode VT1 conducting, relay K adhesive, light-emitting diode D5 is bright, and regulator potentiometer RP2 can regulate under-voltage point.The utility model AC power load protection circuit can by potentiometer RP1 and potentiometer RP2 adjustment doors voltage limit and under-voltage point when changing load, thus protection payload security, adapt to various power consumption equipment; structure is simple; function-stable, cheap, be applicable to promoting the use of.
Claims (4)
1. an AC power load protection circuit, comprise rectifier bridge Q, resistance R1, electric capacity C1, potentiometer RP1, chip U1 and chip U2, it is characterized in that, described rectifier bridge Q pin 1 is connected AC power two ends respectively with pin 3, rectifier bridge Q pin 4 connects relay K contact switch K-1, the contact switch K-1 other end is connecting luminous diode D1 negative pole respectively, electric capacity C1, diode D3 positive pole, electric capacity C2 and negative pole of output end, described rectifier bridge Q pin 2 is contact resistance R5 and diode D2 positive pole respectively, resistance R5 other end connecting luminous diode D1 positive pole, diode D2 negative pole is contact resistance R6 respectively, resistance R2, resistance R3 and the electric capacity C1 other end, the resistance R6 other end connects diode D3 negative pole respectively, the electric capacity C2 other end, output head anode and resistance R4, the resistance R4 other end connects ground connection diode D9 negative pole and resistance R1 respectively, the resistance R1 other end connects chip U1 pin 13, chip U1 pin 12 connects potentiometer RP1 respectively, potentiometer RP1 slide plate and the resistance R2 other end, potentiometer RP1 other end ground connection, the described resistance R3 other end connects power supply VCC respectively, chip U2 pin 1, resistance R10, potentiometer RP2 and potentiometer RP2 slide plate, potentiometer RP2 other end ground connection, the described resistance R10 other end connects chip U2 pin 5 and chip U2 pin 6 respectively, chip U2 pin 2 ground connection, chip U2 pin 4 is contact resistance R8 and diode D6 positive pole respectively, the resistance R8 other end connects ground connection light-emitting diode D5 positive pole, described diode D6 negative pole connects diode D8 negative pole and resistance R9 respectively, resistance R9 other end connecting triode VT1 base stage, triode VT1 grounded emitter, triode VT1 collector electrode connects relay K coil and diode D4 positive pole respectively, diode D4 negative pole connects the relay K coil other end and power supply VCC respectively, described diode D8 positive pole is contact resistance R7 and chip U1 pin 14 respectively, the resistance R7 other end connects ground connection diode D7 positive pole.
2. AC power load protection circuit according to claim 1, is characterized in that, described chip U1 model is LM124.
3. AC power load protection circuit according to claim 1, is characterized in that, described chip U2 model is CD4011.
4. AC power load protection circuit according to claim 1, is characterized in that, described power supply VCC voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232767.7U CN204464969U (en) | 2015-04-12 | 2015-04-12 | A kind of AC power load protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520232767.7U CN204464969U (en) | 2015-04-12 | 2015-04-12 | A kind of AC power load protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204464969U true CN204464969U (en) | 2015-07-08 |
Family
ID=53671796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520232767.7U Expired - Fee Related CN204464969U (en) | 2015-04-12 | 2015-04-12 | A kind of AC power load protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204464969U (en) |
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2015
- 2015-04-12 CN CN201520232767.7U patent/CN204464969U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160412 |