CN204496427U

CN204496427U - A kind of computer circuit breaking protection circuit

Info

Publication number: CN204496427U
Application number: CN201520223718.7U
Authority: CN
Inventors: 丁雪
Original assignee: Yunnan Normal University
Current assignee: Yunnan Normal University
Priority date: 2015-04-15
Filing date: 2015-04-15
Publication date: 2015-07-22
Anticipated expiration: 2025-04-15

Abstract

The utility model discloses a kind of computer circuit breaking protection circuit; comprise power circuit, control circuit and voltage comparator circuit; described power circuit comprises step-down rectifier module, resistance R1 and accumulator E1; described control circuit comprises relay K 1, relay K 2, diode T5 and diode T6, and described voltage comparator circuit comprises chip IC 1, chip IC 2, diode T3 and diode T4.The utility model computer circuit breaking protection circuit utilizes and add standby power supply on common computer power supply; there is the function preventing overcharge of a battery and overdischarge simultaneously; not only save power resource greatly; and extend the serviceable life of accumulator; circuit structure is simple; control precisely, effectively can reduce the loss that solar cell and broadcaster cause because of overcharge and overdischarge.

Description

A kind of computer circuit breaking protection circuit

Technical field

The utility model relates to a kind of protection circuit, specifically simple, the computer circuit breaking protection circuit with defencive function of a kind of structure.

Background technology

Along with socioeconomic development, the living standard of people improves constantly, computer has been people's life & amusement and instrument in office requisite, most desktop computer directly connects line voltage, as everyone knows, once there is powering-off state, very big infringement will be caused to desktop computer, especially because the instant cut-off that causes of power network fluctuation and sending a telegram here instantaneously, computer on-off is made within the extremely short time, keyboard lockout may be caused, hardware aging, the adverse consequencess such as electric breakdown, even loss of data and mainboard such as to burn at the significant problem, greatly reduce the life-span of desktop computer, inconvenience is brought to the Working Life of user, existing power-off protection apparatus exists complicated, control original paper is many, be subject to power network fluctuation interference, therefore need to improve.

Utility model content

The purpose of this utility model is to provide the computer circuit breaking protection circuit that a kind of structure is simple, have defencive function, 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 computer circuit breaking protection circuit, comprise power circuit, control circuit and voltage comparator circuit, described power circuit comprises step-down rectifier module, resistance R1 and accumulator E1, described control circuit comprises relay K 1, relay K 2, diode T5 and diode T6, and described voltage comparator circuit comprises chip IC 1, chip IC 2, diode T3 and diode T4;

Port one and the port 2 of described step-down rectifier module are connected the two ends of 220V alternating current respectively, the port 3 of step-down rectifier module connects relay K 1 contact K1-1, the other end connecting valve S1 of relay K 1 contact K1-1 and resistance R1, the other end of resistance R1 connects the positive pole of accumulator E1, the negative pole contact resistance R4 of accumulator E1, resistance R5, electric capacity C1, the positive pole of diode T2, 4 pins of chip IC 3, the port 4 of step-down rectifier module, the emitter of triode VT1, the emitter of triode VT2, the emitter of triode VT3, the emitter of triode VT4 and computing machine, the other end contact resistance R2 of switch S 1, resistance R3, 1 pin of chip IC 1 and the anode of current regulator diode P1, the negative electrode of current regulator diode P1 connects relay K 1, relay K 2, the negative pole of diode T5, the negative pole of diode T6 and a stiff end of potentiometer RP1, the other end of the other end contact resistance R4 of resistance R2, 3 pins of resistance R7 and chip IC 2, the other end of the other end contact resistance R5 of resistance R3, resistance R10, the other end of electric capacity C1 and 2 pins of chip IC 3, 2 pin contact resistance R6 of chip IC 1, resistance R11, 7 pins of resistance R12 and chip IC 2, 3 pin ground connection of chip IC 1, the other end of resistance R6 connects 2 pins of chip IC 2, 3 pins of chip IC 3 and the negative pole of diode T2, the other end of resistance R7 connects the negative pole of diode T3, the positive pole contact resistance R8 of diode T3 and 6 pins of chip IC 2, the other end of resistance R10 connects the negative pole of diode T4, the positive pole contact resistance R9 of diode T4 and 6 pins of chip IC 3, pin 4 ground connection of chip IC 2, the pin 7 of chip IC 3 connects power supply VCC, the base stage of the other end connecting triode VT1 of resistance R8, the other end of collector contact resistance R11 of triode VT1 and the base stage of triode VT2, the collector of triode VT2 connects the positive pole of diode T5 and the other end of relay K 1, the base stage of the other end connecting triode VT3 of resistance R9, the other end of collector contact resistance R12 of triode VT3 and the base stage of triode VT4, the collector of triode VT4 connects the positive pole of diode T6 and the other end of relay K 2, the sliding end of potentiometer RP1 connects another stiff end of potentiometer RP1 and the contact K2-1 of relay K 2, the other end of the contact K2-1 of relay K 2 connects the other end of computing machine.

As preferred version of the present utility model: described chip IC 1 is 7809 type three-terminal voltage-stabilizing circuit, and chip IC 2 and chip IC 3 are LM331 type voltage comparator.

As preferred version of the present utility model: 220V alternating current is become 12V direct current by described step-down rectifier module.

As preferred version of the present utility model: described power supply VCC is 2 pin output voltages of chip IC 1.

Compared with prior art; the beneficial effects of the utility model are: the utility model computer circuit breaking protection circuit utilizes and add standby power supply on common computer power supply; there is the function preventing overcharge of a battery and overdischarge simultaneously; not only save power resource greatly; and extend the serviceable life of accumulator; circuit structure is simple, controls precisely, effectively can reduce the loss that solar cell and broadcaster cause because of overcharge and overdischarge.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of computer circuit breaking 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 computer circuit breaking protection circuit, comprise power circuit, control circuit and voltage comparator circuit, described power circuit comprises step-down rectifier module, resistance R1 and accumulator E1, described control circuit comprises relay K 1, relay K 2, diode T5 and diode T6, and described voltage comparator circuit comprises chip IC 1, chip IC 2, diode T3 and diode T4;

Chip IC 1 is 7809 type three-terminal voltage-stabilizing circuit, and chip IC 2 and chip IC 3 are LM331 type voltage comparator.220V alternating current is become 12V direct current by described step-down rectifier module.Power supply VCC is 2 pin output voltages of chip IC 1.

Principle of work of the present utility model is: when power switch S1 closes, voltage comparator ic 1 and IC2 in running order, voltage comparator circuit starts to detect the voltage of accumulator E1, when the reference voltage of the voltage detected lower than diode T2, the output terminal of chip IC 2 becomes electronegative potential, triode VT1 ends and triode VT3 starts conducting, so the contact K1-1 adhesive of relay K 1, connect line voltage, 220V line voltage becomes galvanic current through step-down rectifier module, the electric energy produced is charged to accumulator E1 by the contact K1-1 of relay K 1, and when the chip IC 2 in voltage comparator circuit detects the reference voltage of the voltage of accumulator E1 higher than inverting input, the output terminal of chip IC 2 then become noble potential, so triode VT1 conducting and triode VT3 start cut-off, relay K 1 discharges and cuts off the circuit of line voltage and accumulator E1.If accumulator E1 is in discharge condition, chip IC 3 in voltage comparator circuit is in monitoring state all the time, when the voltage of accumulator E1 is higher than the lower limit set, the output terminal of chip IC 3 is also always noble potential, triode VT2 conducting and triode VT4 start cut-off, relay K 2 is in release conditions, accumulator E1 and load circuit also form the loop of power supply all the time by the contact K2-1 of relay K 2, but when chip IC 3 detects the voltage of accumulator E1 lower than reference voltage, the output terminal of chip IC 3 transfers to export electronegative potential, at this moment triode VT2 just starts cut-off triode VT4 and then starts conducting, the contact K2-1 of relay K 2 starts adhesive thus, so just cut off the power supply that accumulator leads to load, thus play protection accumulator E1 and be unlikely to overdischarge and cause the under-voltage of circuit, in this circuit, when civil power is normally, by accumulator and line voltage, interleaved power is carried out to computer, play the effect of saves energy, when line voltage power-off, accumulator can be powered from trend electric energy, play the object of power-off protection, not only protected effect is good, and the serviceable life of accumulator obtains great increase.

Claims

1. a computer circuit breaking protection circuit, comprises power circuit, control circuit and voltage comparator circuit; It is characterized in that, described power circuit comprises step-down rectifier module, resistance R1 and accumulator E1, described control circuit comprises relay K 1, relay K 2, diode T5 and diode T6, and described voltage comparator circuit comprises chip IC 1, chip IC 2, diode T3 and diode T4;

2. a kind of computer circuit breaking protection circuit according to claim 1, is characterized in that, described chip IC 1 is 7809 type three-terminal voltage-stabilizing circuit, and chip IC 2 and chip IC 3 are LM331 type voltage comparator.

3. a kind of computer circuit breaking protection circuit according to claim 1, is characterized in that, 220V alternating current is become 12V direct current by described step-down rectifier module.

4. a kind of computer circuit breaking protection circuit according to claim 1, is characterized in that, described power supply VCC is 2 pin output voltages of chip IC 1.