CN205121473U - Computer power failure protection circuit - Google Patents
Computer power failure protection circuit Download PDFInfo
- Publication number
- CN205121473U CN205121473U CN201520637728.5U CN201520637728U CN205121473U CN 205121473 U CN205121473 U CN 205121473U CN 201520637728 U CN201520637728 U CN 201520637728U CN 205121473 U CN205121473 U CN 205121473U
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- resistance
- triode
- diode
- computer
- electric capacity
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- Expired - Fee Related
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Abstract
The utility model discloses a computer power failure protection circuit, including resistance R1, key switch S, triode VT1 and diode D2, triode VT3 projecting pole, resistance R3, electric capacity C2, key switch S and 220V alternating current one end are connected respectively to triode VT1 collecting electrode, and triode VT1 projecting pole is connecting resistance R7, diode D3 negative pole and computer power respectively, and the 220V alternating current other end and the electric capacity C2 other end are connected respectively to the computer power other end. The utility model discloses the circuit can produce the time delay effect in the undulant perhaps power failure of grid voltage to reduce the harmful effects to the computer, if power -off time is very short, disconnected electric phenomena can not take place even for the computer, and the effectual safety of protecting the computer has prolonged the life of computer, and circuit structure is simple moreover, and the function is stable, owing to do not use any electron chip, the interference killing feature is strong in addition.
Description
Technical field
The utility model relates to a kind of protection circuit, specifically a kind of computing machine power failure protection circuit.
Background technology
Order much all should run into this thing allowing people's misery of power-off with the friend of desktop computer work, sometimes casual tripping operation or pulled out power lead etc. situation because of carelessness and cause power-off, capital allows the content of also not preserving all lose, and sometimes can cause very large economic loss to user.
Utility model content
The purpose of this utility model is to provide the computing machine power failure protection circuit that a kind of structure is simple, 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 computing machine power failure protection circuit, comprise resistance R1, keyswitch S, triode VT1 and diode D2, described triode VT1 collector is connecting triode VT3 emitter respectively, resistance R3, electric capacity C2, keyswitch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and computer power supply, the computer power supply other end connects the 220V alternating current other end and the electric capacity C2 other end respectively, described diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D2 negative pole and triode VT2 base stage, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, described keyswitch S other end contact resistance R1, the resistance R1 other end connects stake resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
As the utility model further scheme: described diode D3 is voltage stabilizing diode.
Compared with prior art; the beneficial effects of the utility model are: the utility model circuit can produce delay effect when voltage ripple of power network or power failure; to reduce the harmful effect to computing machine, if power-off time is very short, even can not there is circut breaking in computing machine; effectively protect the safety of computing machine; extend the serviceable life of computing machine, and circuit structure is simple, function-stable; in addition owing to not using any electronic chip, antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of computing machine power failure 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 computing machine power failure protection circuit, comprise resistance R1, keyswitch S, triode VT1 and diode D2, triode VT1 collector is connecting triode VT3 emitter respectively, resistance R3, electric capacity C2, keyswitch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and computer power supply, the computer power supply other end connects the 220V alternating current other end and the electric capacity C2 other end respectively, described diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D2 negative pole and triode VT2 base stage, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, described keyswitch S other end contact resistance R1, the resistance R1 other end connects stake resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
Diode D3 is voltage stabilizing diode.
Principle of work of the present utility model is: in the utility model circuit, electric capacity C1 is charged by resistance R2 and triode VT3, when there is circut breaking, when diode D3 cathode voltage drops to the voltage breakdown of diode D3, diode D3 ends, triode VT2 also ends, electric capacity C1 discharges, when the disconnection fault time is greater than the charging rate of resistance R2 and electric capacity C1, triode VT1, VT3 ends, deenergization voltage and computer power supply path, and when the disconnection fault time is less than charging rate, triode VT1, VT3 conducting, after fault, when diode D3 cathode voltage rises to the voltage breakdown being greater than diode D3, circuit normally works.When circuit is in cut-off state, after disconnection fault is got rid of, the switch S that pushes button can recover normal.
Claims (2)
1. a computing machine power failure protection circuit, comprise resistance R1, keyswitch S, triode VT1 and diode D2, it is characterized in that, described triode VT1 collector is connecting triode VT3 emitter respectively, resistance R3, electric capacity C2, keyswitch S and 220V alternating current one end, triode VT1 emitter is contact resistance R7 respectively, diode D3 negative pole and computer power supply, the computer power supply other end connects the 220V alternating current other end and the electric capacity C2 other end respectively, described diode D3 positive pole contact resistance R8, the resistance R8 other end connects diode D2 negative pole and triode VT2 base stage, triode VT2 emitter connects electric capacity C1 and ground connection, triode VT2 collector connects the electric capacity C1 other end and resistance R4 respectively, the resistance R4 other end is the contact resistance R3 other end and triode VT3 base stage respectively, triode VT3 collector is contact resistance R6 and the resistance R7 other end respectively, resistance R6 other end connecting triode VT1 base stage, described keyswitch S other end contact resistance R1, the resistance R1 other end connects stake resistance R2 and resistance R5 respectively, the resistance R5 other end connects diode D2 positive pole.
2. computing machine power failure protection circuit according to claim 1, is characterized in that, described diode D3 is voltage stabilizing diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520637728.5U CN205121473U (en) | 2015-08-20 | 2015-08-20 | Computer power failure protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520637728.5U CN205121473U (en) | 2015-08-20 | 2015-08-20 | Computer power failure protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205121473U true CN205121473U (en) | 2016-03-30 |
Family
ID=55577063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520637728.5U Expired - Fee Related CN205121473U (en) | 2015-08-20 | 2015-08-20 | Computer power failure protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205121473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231862A (en) * | 2018-03-06 | 2019-09-13 | 佛山市顺德区顺达电脑厂有限公司 | Server system and its method with power-down protection |
-
2015
- 2015-08-20 CN CN201520637728.5U patent/CN205121473U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231862A (en) * | 2018-03-06 | 2019-09-13 | 佛山市顺德区顺达电脑厂有限公司 | Server system and its method with power-down protection |
| CN110231862B (en) * | 2018-03-06 | 2022-10-28 | 佛山市顺德区顺达电脑厂有限公司 | Server system with power failure protection function and method thereof |
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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: 20160330 Termination date: 20160820 |