CN201278457Y

CN201278457Y - Computer intelligent complete shut-down protector with over-voltage protection

Info

Publication number: CN201278457Y
Application number: CNU200820104490XU
Authority: CN
Inventors: 何琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-20
Filing date: 2008-08-20
Publication date: 2009-07-22
Anticipated expiration: 2018-08-20

Abstract

A computer intelligent whole shutoff protector with overvoltage protection function relates to a device with functions for overvoltage protection of a computer, shutdown for power cut protection and shutdown for whole power supply shutoff, in particular to a protector which can distinguish safety and danger to automatically cut off commercial power and shut off the computer to automatically cut off commercial power. The protector comprises a power supply circuit (1), a delay control circuit (2), a self-protection control circuit (3), a sampling voltage circuit (4) and an overvoltage protection circuit (5). The utility model enables the computer to have the functions of overvoltage protection whole shutoff and power cut protection shutoff; an overvoltage protection system adopts a fuse circuit which is not needed to be replaced, the computer cannot be started up when the electric network is in overvoltage; when sudden power cut happens, the connection with the commercial power can be automatically cut off, a person can shut off the computer by only softly clicking the mouse, thus the AC power supply of the whole computer can be automatically cut off, at this moment, the person can leave without needing waiting a commercial switch to be shut off, thereby the purposes of energy saving and more convenient use can be achieved. Except for the computer, the protector can be also used for electric appliances such as a television, and the like which still has no function for automatically cutting off a commercial power supply when shutdown.

Description

Computerized intelligent complete shut-down cut-off protector with overvoltage protection

Technical field:

The utility model relates to the overvoltage protection of computer and the disconnected device of automatic complete shut-down of shutdown power supply, especially can discern safety and dangerous voltage normal boot-strap or protection shutdown, and the computer normal shutdown cuts off the protector of AC power automatically.

Background technology

Computer is to use electrical equipment more widely at present, owing to its price constantly descends, so be used as the intelligence tool of carrying out various application by people.Also there are some problems in computer in the market aspect protection, it mainly shows: can not cut off the complete machine AC power automatically when (1) electrical network overvoltage or thunderbolt overvoltage.(2) power failure or shutdown can only be cut off computer power and can not cut off the complete machine AC power automatically.

There are not overvoltage protection, thunderbolt and grid power blackout or shut down of computer can not cut off the deficiency of AC power automatically in order to overcome existing computer; the utility model provides a kind of protector; timely deenergization when this protector can not only and be struck by lightning overvoltage in the electrical network overvoltage, and can when grid power blackout and computer normal shutdown, cut off the complete machine AC power easily automatically.

The utility model content:

The technical scheme that its technical problem that solves the utility model adopts is: it is made up of power circuit 1, delay control circuit 2, self-insurance control circuit 3, sampling voltage circuit 4, overvoltage crowbar 5; The voltage output end of power circuit 1 is connected with the voltage input end of delay control circuit 2; the signal voltage output of delay control circuit 2 is connected with the control signal output ends of self-insurance control circuit 3 and the voltage input end of overvoltage crowbar 5 respectively; the signal input end of self-insurance control circuit 3 is connected with the output of sampling voltage circuit 4; the signal voltage input of sampling voltage circuit 4 is connected with power circuit 1, and the input of the control signal of overvoltage crowbar 5 is connected with dc supply.The utility model beneficial effect is as follows: the overvoltage protection complete closedown; the power-failure protecting shutdown; civil power is equal energy operate as normal when 190-260 volt range; the overvoltage protection protection system adopts need not change Bao Xian Silk circuit; the electrical network overvoltage then can't be started shooting; again starting shooting after voltage is normal gets final product, and as unexpected power failure, the automatic cut-out of meeting is connected with civil power; if send a telegram here again; if start again, computer is task more not, and the computer normal shutdown mouse of only need clicking just can cut off the complete machine AC power automatically; personnel can leave; need not to wait for and turn-off the urban electric power switch, reach energy efficient, use safer.This protector has automatically, control simple, intelligent, make easily, except being used for computer, also can be used for not having television set or other electrical equipment that mains supply is cut off in shutdown automatically as yet.

Description of drawings:

Fig. 1 is an overall structure schematic block diagram of the present utility model, and Fig. 2 is the protector electrical block diagram.

Embodiment:

As shown in Figure 1, this embodiment is made up of power circuit 1, delay control circuit 2, self-insurance control circuit 3, sampling voltage circuit 4, overvoltage crowbar 5; The voltage output end of power circuit 1 is connected with the voltage input end of delay control circuit 2; the signal voltage output of delay control circuit 2 is connected with the control signal output ends of self-insurance control circuit 3 and the voltage input end of overvoltage crowbar 5 respectively; the signal input end of self-insurance control circuit 3 is connected with the output of sampling voltage circuit 4; the signal voltage input of sampling voltage circuit 4 is connected with power circuit 1, and the input of the control signal of overvoltage crowbar 5 is connected with dc supply.As shown in Figure 2; described protector circuit is made up of light-emitting diode DEL, the power transformer B1 of seven resistance R 1-R7, three capacitor C 1-C3, four diode D1-D4, three triode T1-T3, time-base circuit IC1, comparison circuit IC2, relay J 0, touch-switch K, variable resistor RW, voltage-stabiliser tube DW, double as indicator light, sampling transformer B2 (B2 is available resistance generation also, but not energy-conservation).Time-base circuit IC1 selects the NE555 model for use, and comparator IC2 selects the LM324 model for use, and triode T1 selects the C1815 model for use, and T2, T3 select the A1015 model for use.Two inputs of alternating current 220V respectively with the two ends of touch-switch K and two normally opened contact J01 of relay J 0, J02 is connected with the elementary two ends of transformer B1, the secondary two ends of transformer B1 and diode D1, the anode of D2 is connected, centre tap ground connection, diode D1, the negative pole of D2 and capacitor C 2 positive poles, 4 pin of the positive pole of C3 and IC1,8 pin, the emitter of triode T3,4 pin of comparator IC2, the end of variable resistor RW, one end of resistance R 7 is connected, the minus earth of

capacitor C

2,2 pin of the negative pole of capacitor C 3 and time-base circuit IC1,6 pin, one end of resistance R 2 is connected, the other end ground connection of resistance R 2, the 1 pin ground connection of time-base circuit IC1,3 pin of time-base circuit IC1 are connected with an end of resistance R 4, resistance R 4 other ends are connected with the base stage of triode T3 and an end of resistance R 5, the collector electrode of triode T3 is connected with the emitter of triode T2, one end of the collector electrode of triode T2 and relay J 0, the negative pole of diode D4 is connected, the other end of relay J 0, the positive pole one end ground connection of diode D4, the base stage of triode T2 is connected with an end of resistance R 6, the other end of resistance R 6 is connected with the positive pole of light-emitting diode DEL, the negative pole of light-emitting diode DEL is connected with output 1 pin of comparator IC2, end of oppisite phase 2 pin of comparator IC2 are connected with an end of the negative pole of voltage-stabiliser tube DW and resistance R 7,11 pin of comparator IC2 and the plus earth of voltage-stabiliser tube DW, in-phase end 3 pin of comparator IC2 are connected with the centre tap of variable resistor RW, the other end ground connection of variable resistor RW, triode T1 collector electrode is connected with an end of resistance R 5, the grounded emitter of triode T1, the base stage of triode T1 and resistance R 1, the end of R3 is connected, the other end ground connection of resistance R 3, the positive pole of the other end of resistance R 1 and capacitor C 1, the negative pole of diode D3 is connected, capacitor C 1 minus earth, the positive pole of diode D3 is connected with an end of B2 level of sampling transformer, the other end ground connection of transformer B2, sampling transformer B2's is elementary by the two ends of computer and touch-switch K and two normally opened contact J01 of relay J 0, J02 is connected with the two ends of transformer B1.The selection of main devices: voltage comparator adopts LM324, the operational amplifier of its built-in 4 groups of identical function, this circuit one group of operational amplifier wherein.Main feature is as follows: (1) can use the single supply work of 3-30 volt wide region; also can use ± 2 volts power work; (2) current sinking is little; about 0.8 milliampere, and with the independent of power voltage of use, (3) voltage gain is big; 100B; (4) input common mode voltage can be to connecing low level, and (5) IC inside keeps frequency compensated circuit, the protective circuit of the additional output short circuit of (6) IC itself.

Operation principle:

As shown in Figure 2, form decompression rectifier filter circuit by transformer B1, D1, D2, C2, civil power is exported the 12V direct voltage after rectification, is the entire circuit power supply.Form delay control circuit by IC1, C3, R2, R4, T3, form overvoltage crowbar, form holding circuit, form voltage sample circuit by B2, D3, C1 by T1, R1, R3, R5 by IC2, T2, R6, R7, RW, DW, DEL.After pressing power supply touch-switch K; the delay control circuit work of forming by time-base circuit IC1 (NE555) and peripheral cell; 3 pin output low level triode T3 (A1015) conductings of time-base circuit IC1 (NE555); because line voltage is normal; overvoltage crowbar is failure to actuate; the 1 pin output low level of comparator IC2 (LM324); LED is bright; triode T2 (A1015) conducting; its normally opened contact of relay J 0 adhesive J01; the closed also self-insurance computer of J02 gets; about 1 minute of time of delay; do not start shooting the automatic disconnection civil power as if computer at this moment; when if computer is in running order at this moment; sampling transformer B2 is elementary to have electric current to pass through; in the sampling voltage of secondary induction through diode D3; output control voltage makes triode T1 (C1815) conducting behind capacitor C 1 rectifying and wave-filtering; when still keeping relay J 0 after ending in 1 minute, triode T3 (A1015) continues adhesive like this; guarantee the computer operate as normal; when computer is not started shooting or is shut down; the voltage of sampling transformer B2 secondary induction is low; deficiency is so that triode T1 (C1815) conducting; circuit can not self-insurance; relay J 0 its normally opened contact J01; J02 disconnects; the computer complete machine complete shut-down electricity of cutting off market reaches purpose energy-conservation and the protection computer.When line voltage reaches 260V or thunderbolt; the operating voltage of circuit will raise; the 3 pin voltages of comparator IC2 (LM324) will raise; cause the 1 pin output high level of comparator IC2 (LM324); triode T2 (A1015) is become by conducting and ends; its normally opened contact of relay J 0 dead electricity J01, J02 disconnect, and the computer complete machine complete shut-down electricity of cutting off market reaches the purpose of overvoltage protection.

Adopt above circuit can effectively solve the following problem that present computer exists: can not cut off the complete machine AC power automatically when (1) electrical network overvoltage or thunderbolt overvoltage.(2) power failure or shutdown can only be cut off computer power and can not cut off the complete machine AC power automatically.

Claims

1, the Computerized intelligent complete shut-down cut-off protector that has overvoltage protection is characterized in that it is made up of power circuit (1), delay control circuit (2), self-insurance control circuit (3), sampling voltage circuit (4), overvoltage crowbar (5); The voltage output end of power circuit (1) is connected with the voltage input end of delay control circuit (2); the signal voltage output of delay control circuit (2) is connected with the control signal output ends of self-insurance control circuit (3) and the voltage input end of overvoltage crowbar (5) respectively; the signal input end of self-insurance control circuit (3) is connected with the output of sampling voltage circuit (4); the signal voltage input of sampling voltage circuit (4) is connected with power circuit (1), and the input of the control signal of overvoltage crowbar (5) is connected with dc supply.

2, the Computerized intelligent complete shut-down cut-off protector with overvoltage protection according to claim 1; it is characterized in that forming by the light-emitting diode (DEL) of seven resistance (R1-R7), three electric capacity (C1-C3), four diodes (D1-D4), three triodes (T1-T3), time-base circuit (NE), comparison circuit (LM), relay (J0), touch-switch (K), variable resistor (RW), voltage-stabiliser tube (DW), double as indicator light, power transformer (B1), sampling transformer (B2) (B2 is available resistance generation also, but not energy-conservation).Two inputs of alternating current 220V respectively with the two ends of touch-switch (K) and two normally opened contacts (J01) of relay (J0), (J02) be connected with the elementary two ends of transformer (B1), the secondary two ends of transformer (B1) and diode (D1), (D2) anode is connected, centre tap ground connection, diode (D1), (D2) negative pole and electric capacity (C2), (C3) (4) pin of positive pole and time-base circuit (IC1), (8) pin, the emitter of triode (T3), (4) pin of comparator (IC2), one end of variable resistor (RW), one end of resistance (R7) is connected, the minus earth of electric capacity (C2), (2) pin of the negative pole of electric capacity (C3) and time-base circuit (IC1), (6) pin, one end of resistance (R2) is connected, the other end ground connection of resistance (R2), (1) pin ground connection of time-base circuit (IC1), (3) pin of time-base circuit (IC1) is connected with an end of resistance (R4), resistance (R4) other end is connected with the base stage of triode (T3) and an end of resistance (R5), the collector electrode of triode (T3) is connected with the emitter of triode (T2), one end of the collector electrode of triode (T2) and relay (J0), the negative pole of diode (D4) is connected, the other end of relay (J0), the positive pole one end ground connection of diode (D4), the base stage of triode (T2) is connected with an end of resistance (R6), the other end of resistance (R6) is connected with the positive pole of light-emitting diode (DEL), the negative pole of light-emitting diode (DEL) is connected with output (1) pin of comparator (IC2), end of oppisite phase (2) pin of comparator (IC2) is connected with an end of the negative pole of voltage-stabiliser tube (DW) and resistance (R7), the plus earth of (11) pin of comparator (IC2) and voltage-stabiliser tube (DW), in-phase end (3) pin of comparator (IC2) is connected with the centre tap of variable resistor (RW), the other end ground connection of variable resistor (RW), triode (T1) collector electrode is connected with an end of resistance (R5), the grounded emitter of triode (T1), the base stage of triode (T1) and resistance (R1), (R3) a end is connected, the other end ground connection of resistance (R3), the positive pole of the other end of resistance (R1) and electric capacity (C1), the negative pole of diode (D3) is connected, electric capacity (C1) minus earth, the secondary end of the positive pole of diode (D3) and sampling transformer (B2) is connected, the other end ground connection of transformer (B2), sampling transformer (B2) elementary by the two ends of computer and touch-switch (K) and two normally opened contacts (J01) of relay (J0), (J02) be connected with the elementary two ends of transformer (B1).