CN205016988U

CN205016988U - Campus safety automatic control that rations power supply

Info

Publication number: CN205016988U
Application number: CN201520820569.2U
Authority: CN
Inventors: 周芒
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-22
Filing date: 2015-10-22
Publication date: 2016-02-03
Anticipated expiration: 2025-10-22

Abstract

The utility model discloses a campus safety automatic control that rations power supply, including transformer T1, transformer W1, chip IC1 and electric capacity C3, transformer W1's winding N1's one end is connected transient voltage and is restrained diode DW, 220V alternating current and load A, and electric capacity C1, relay J are connected to transformer W1's winding N1's the other end contact J -1, transient voltage restrain diode DW's the other end and the other end of 220V alternating current. The utility model discloses campus safety automatic control that rations power supply circuit structure is simple, components and parts are few, and electronic component simple to use constitutes voltage testing, and the electric current that flows through the motor through the change reaches the purpose of accommodate motor rotational speed, can with motor rotation number automatic stabilization the setting value near, have consequently that the cost of manufacture is hanged down, stable performance and convenient to use's an advantage.

Description

A kind of Campus Security is rationed the power supply automatic controller

Technical field

The utility model relates to a kind of automatic control circuit, and specifically a kind of Campus Security is rationed the power supply automatic controller.

Background technology

Electricity-limiter is mainly used in limiting bearing power, to prevent because load is excessive on circuit, or constantly becomes large in use because of load, causes line load to increase and the damage that causes.Because the load that circuit connects is of all shapes and colors, particularly modern power consumption equipment power is all comparatively large, and the overloading being so often easy to ignore load on the line produces.Especially in campus, the security precautions of student is poor, easily because use the large power-consuming equipment initiation fire accidents such as immersion heater, electric cooker, hair dryer, for this reason, need, in supply line, electricity-limiter is installed, the most poor stability of electricity-limiter in the market, is easily subject to the impact of city's electro-mechanical wave and false triggering, makes troubles to user.

Utility model content

The purpose of this utility model is to provide a kind of Campus Security to ration the power supply automatic controller, 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 Campus Security is rationed the power supply automatic controller, comprise transformer T1, transformer W1, chip IC 1 and electric capacity C3, one end of the winding N1 of described transformer W1 connects transient voltage suppressor diode DW, 220V alternating current and load A, the other end of the winding N1 of transformer W1 connects electric capacity C1, the contact J-1 of relay J, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the other end of electric capacity C1 connects the other end of contact J-1 and the winding L 1 of transformer W2 of relay J, the other end of the winding L 1 of transformer W2 connects the other end of load A, one end of the winding N2 of transformer W1 connects the port one of rectifier bridge T1, the port 2 resistance R5 of rectifier bridge T1, resistance R6, resistance R7, electric capacity C2, the negative electrode of diode D2, the pin 1 of relay J and chip IC 1, the other end of electric capacity C2 connects electric capacity C3, the pin 2 of chip IC 1 and the port 4 of rectifier bridge T1, the pin 3 of chip IC 1 connects electric capacity C3, the emitter of triode V1, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the pin 3 contact resistance R3 of chip IC 2 and resistance R4, the base stage of the other end connecting triode V2 of resistance R3, the other end of resistance R4 connects the anode of diode D1, the base stage of the negative electrode connecting triode V1 of diode D1, the collector electrode of triode V1 connects buzzer B, the pin 2 of chip IC 2 connects the pin 6 of chip IC 2 and the sliding end of potentiometer W, a stiff end contact resistance R1 of potentiometer W, the other end of resistance R1 connects port 2 and the electric capacity C3 of rectifier bridge T2, the two ends of the winding L 2 of the port one of rectifier bridge T2 and the port 3 difference connection transformer W2 of rectifier bridge T2, the other end of collector electrode contact resistance R5 of triode V2 and the base stage of triode V3, the collector electrode of triode V3 connects the negative electrode of diode D1, the anode of diode D2 and the other end of relay J, the other end of resistance R7 connects the anode of diode D2, the model of described chip IC 1 is LM7809, the model of chip IC 2 is NE555.

As preferred version of the present utility model: described diode D1 and diode D2 is light-emitting diode.

Compared with prior art, the beneficial effects of the utility model are: the utility model Campus Security is rationed the power supply, and automatic controller circuit structure is simple, components and parts are few, use transformer as power detection element, can Real-Time Monitoring power information, automatic shutoff circuit when running into overload power utilization, and be provided with peak voltage suppression element in circuit, reduce false triggering probability, therefore there is the advantage of low, the easy to use and stable performance of cost.

Accompanying drawing explanation

Fig. 1 is that Campus Security is rationed the power supply the circuit diagram of automatic controller.

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, a kind of Campus Security is rationed the power supply automatic controller, comprise transformer T1, transformer W1, chip IC 1 and electric capacity C3, one end of the winding N1 of described transformer W1 connects transient voltage suppressor diode DW, 220V alternating current and load A, the other end of the winding N1 of transformer W1 connects electric capacity C1, the contact J-1 of relay J, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the other end of electric capacity C1 connects the other end of contact J-1 and the winding L 1 of transformer W2 of relay J, the other end of the winding L 1 of transformer W2 connects the other end of load A, one end of the winding N2 of transformer W1 connects the port one of rectifier bridge T1, the port 2 resistance R5 of rectifier bridge T1, resistance R6, resistance R7, electric capacity C2, the negative electrode of diode D2, the pin 1 of relay J and chip IC 1, the other end of electric capacity C2 connects electric capacity C3, the pin 2 of chip IC 1 and the port 4 of rectifier bridge T1, the pin 3 of chip IC 1 connects electric capacity C3, the emitter of triode V1, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the pin 3 contact resistance R3 of chip IC 2 and resistance R4, the base stage of the other end connecting triode V2 of resistance R3, the other end of resistance R4 connects the anode of diode D1, the base stage of the negative electrode connecting triode V1 of diode D1, the collector electrode of triode V1 connects buzzer B, the pin 2 of chip IC 2 connects the pin 6 of chip IC 2 and the sliding end of potentiometer W, a stiff end contact resistance R1 of potentiometer W, the other end of resistance R1 connects port 2 and the electric capacity C3 of rectifier bridge T2, the two ends of the winding L 2 of the port one of rectifier bridge T2 and the port 3 difference connection transformer W2 of rectifier bridge T2, the other end of collector electrode contact resistance R5 of triode V2 and the base stage of triode V3, the collector electrode of triode V3 connects the negative electrode of diode D1, the anode of diode D2 and the other end of relay J, the other end of resistance R7 connects the anode of diode D2, the model of described chip IC 1 is LM7809, the model of chip IC 2 is NE555.

Diode D1 and diode D2 is light-emitting diode.

Operation principle of the present utility model is: 220V civil power is through W1 step-down, and Tl rectification C2 wave-wave, for circuit provides 12V DC operation, for chip IC 2 and buzzer B provide 6V to work after chip IC 1 voltage stabilizing.During normal electricity consumption, J is in release condition, does not consume consuming electric power, and its contact J-1 closes, and load A obtains electric work; T2 is used for bearing power identification, when load A obtains electric work, flows through L1, induction is produced at L2 end, through T2 full-wave rectification, C3, R1, W, R2 dividing potential drop, be coupled to 2 of IC2,6 pin, IC2 is linked to be monostable mode, as voltage comparator, when 2, the 6 pin voltages of IC2 are lower than 1/3V, 3 pin export high, make V2 saturated through R3.V3 ends, and J is in release condition, and J-1 closes, and circuit maintains normal power supply; Because 3 pin of IC2 are high level 4.5V, D1 is not enough to conducting, and Vl ends, and buzzer is sounding not.When exceeding power limitation by electric loading, in L1, electric current increase, L2 both end voltage raise, through IC2 rectification.C3 two ends direct voltage raises immediately, 2, the 6 pin input voltage >2/3VCC of IC2, and its state is reversed, 3 pin output low levels.V2 cut-off, V3 saturation conduction, J obtains electric adhesive, and J-1 disconnects, and cuts off load supplying loop, and now 1 obtain electroluminescence, D1 conducting, V1 is saturated, and buzzer obtains electric sounding, realizes sound and light alarm.The voltage at C3 two ends, by R1, W, R2 electric discharge, will reduce gradually, and when 2,6 voltages of IC2 reduce to <1/3Vcc, IC2 upset, 3 pin become high level, the saturated V3 cut-off of V2, and J release, J-1 close, and again detect bearing power; Pulled out .J as excess load load can maintain release condition and continue power supply to load, as excess load load is not still pulled out, circuit will repeat above-mentioned power process, excess load report to the police during circuit 30 seconds/time are detected as to load.In figure, D2 is instruction, and C1 is relay contact protection, spark damage contact when can prevent J-1 from disconnecting.

Claims

1. a Campus Security is rationed the power supply automatic controller, comprise transformer T1, transformer W1, chip IC 1 and electric capacity C3, it is characterized in that, one end of the winding N1 of described transformer W1 connects transient voltage suppressor diode DW, 220V alternating current and load A, the other end of the winding N1 of transformer W1 connects electric capacity C1, the contact J-1 of relay J, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the other end of electric capacity C1 connects the other end of contact J-1 and the winding L 1 of transformer W2 of relay J, the other end of the winding L 1 of transformer W2 connects the other end of load A, one end of the winding N2 of transformer W1 connects the port one of rectifier bridge T1, the port 2 resistance R5 of rectifier bridge T1, resistance R6, resistance R7, electric capacity C2, the negative electrode of diode D2, the pin 1 of relay J and chip IC 1, the other end of electric capacity C2 connects electric capacity C3, the pin 2 of chip IC 1 and the port 4 of rectifier bridge T1, the pin 3 of chip IC 1 connects electric capacity C3, the emitter of triode V1, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the pin 3 contact resistance R3 of chip IC 2 and resistance R4, the base stage of the other end connecting triode V2 of resistance R3, the other end of resistance R4 connects the anode of diode D1, the base stage of the negative electrode connecting triode V1 of diode D1, the collector electrode of triode V1 connects buzzer B, the pin 2 of chip IC 2 connects the pin 6 of chip IC 2 and the sliding end of potentiometer W, a stiff end contact resistance R1 of potentiometer W, the other end of resistance R1 connects port 2 and the electric capacity C3 of rectifier bridge T2, the two ends of the winding L 2 of the port one of rectifier bridge T2 and the port 3 difference connection transformer W2 of rectifier bridge T2, the other end of collector electrode contact resistance R5 of triode V2 and the base stage of triode V3, the collector electrode of triode V3 connects the negative electrode of diode D1, the anode of diode D2 and the other end of relay J, the other end of resistance R7 connects the anode of diode D2, the model of described chip IC 1 is LM7809, the model of chip IC 2 is NE555.

2. a kind of Campus Security according to claim 1 is rationed the power supply automatic controller, and it is characterized in that, described diode D1 and diode D2 is light-emitting diode.