CN2162730Y

CN2162730Y - Voltage regulation device with overvoltage under-roll protection

Info

Publication number: CN2162730Y
Application number: CN 93218069
Authority: CN
Inventors: 陶久安
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-13
Filing date: 1993-07-13
Publication date: 1994-04-20
Anticipated expiration: 2003-07-13

Abstract

The utility model relates to a voltage regulation device with over voltage and under voltage protections, comprising a regulating winding L1, an output socket Z connected with the output end of the regulating winding L1, and a winding L2 coupled with the regulating winding L1. The voltage regulation device with over voltage and under voltage protections is characterized in that voltage output by the winding L 2 is filtered wave and rectified by a rectifying filter circuit, and then is input to a control circuit to control the sizes of currents which flow through a relay J and enable the normally open contacts of the relay J to close or switch off. The normally open contacts J 1-1 of the relay J are connected in series with a power input plug, and then is connected to the input end of the regulating winding L1. The utility model has the advantages of reliable operation, energy saving, simple circuits, and easy fabrication.

Description

Voltage regulation device with overvoltage under-roll protection

The utility model relates to a kind of regulator with overvoltage, under-voltage protection.

The lifting principle of voltage regulator is the tap position by the change autotransformer, changes the voltage turns ratio of autotransformer, thereby changes the size of voltage; When voltage raise suddenly, when particularly self-power generation and power supply was used in rural area or mountain area, when especially running into the conversion of self power generation and civil power, the voltage turns ratio of transformer changed few, and exportable change in voltage is very big, becomes very high, as easy as rolling off a log damage electric equipment.A kind of voice guard is arranged in the market, be raised to when higher at voltage, can only report to the police, the non-cutting power supply can only be reported to the police, and can damage voltage regulator and load so inevitably; Also have a kind of cut-out load power source pressure regulation protector, because it does not cut off whole power supply, the circuit except load also has electricity, also damages easily.Above-mentioned two kinds all can not under-voltage protection.

The purpose of this utility model provides a kind of when overvoltage occurring, directly cutting off the pressure regulation protector of input power supply when under-voltage.

In order to achieve the above object, the utility model is to realize like this, it comprises pressure regulation winding L 1, is connected on the accessory power outlet Z of pressure regulation winding L 1 output and the winding L 2 that is coupled with pressure regulation winding L 1, it is characterized in that: the alternating current of winding L 2 outputs is behind the current rectifying and wave filtering circuit filter rectification, input to control circuit and cross the size of current of relay J, make the normally opened contact J of relay J with control flows ₁-1 closed or disconnection; The normally opened contact J of relay J _1-1With the input that is connected on pressure regulation winding L 1 after power input plug is connected; The normal normally opened contact J that opens moving K switch 1 and relay J ₁In parallel.Above-mentioned control circuit comprises adjustable resistance W1, adjustable resistance W2, triode BG1, triode BG2 and charging capacitor C2; Two terminations of adjustable resistance W1 are through the filtered both ends of power of current rectifying and wave filtering circuit, the base stage of it is adjustable termination triode BG1, the collector electrode of triode BG1 connects power positive end behind the current rectifying and wave filtering circuit rectifying and wave-filtering by adjustable resistance W2, the adjustable termination of adjustable resistance W2 is through the filtered power positive end of current rectifying and wave filtering circuit, the emitter of triode BG1 and triode BG2 is ground connection respectively, the base stage of triode BG2 connects the collector electrode of triode BG1, and the collector electrode of triode BG2 connects power positive end behind the current rectifying and wave filtering circuit rectifying and wave-filtering by relay J; The collector electrode of charging capacitor C2 one termination triode BG1, other end ground connection; Regulate the size of adjustable resistance W1, make triode BG1 conducting when input voltage is higher than 240 volts, the size of adjusting adjustable resistance W2 makes triode BG2 in input voltage conducting during just at 180 volts, ends when being lower than 180 volts.During use, the power input plug on the winding L 1 connects alternating current, and load is connected on the accessory power outlet on the winding L 1.When voltage just often (180～240V), BG1 ends because of triode, this moment voltage by conditioned circuit W2 to charging capacitor C2 charging, when reaching triode BG2 conduction value, triode BG2 conducting, relay J upper reaches overcurrent, its normally opened contact J _1-1Closure, energized.When the alternating voltage rising was higher than 240 volts, triode BG1 conducting ended triode BG2, and relay is not worked, also the input power supply that just cuts off.Equally, when voltage was lower than 180 volts, triode BG2 ended, and relay J is not worked, and has cut off the input power supply yet.Occurring under overvoltage, the under-voltage situation, this device can be protected various household electrical appliance.

The utility model compared with prior art has following advantage:

1, reliable operation, energy savings;

2, circuit is simple, makes easily.

Fig. 1 is circuit theory diagrams of the present utility model.

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1, it comprises pressure regulation winding L 1, is connected on the accessory power outlet Z of pressure regulation winding L 1 output and the winding L 2 that is coupled with pressure regulation winding L 1, the alternating current of winding L 2 outputs is behind current rectifying and wave filtering circuit (1) filter rectification, input to control circuit (2) and cross the size of current of relay J, make the normally opened contact J of relay J with control flows _1-1Closure or disconnection; The normally opened contact J of relay J _1-1With the input that connects pressure regulation winding L 1 after input plug is connected.Control circuit of the present utility model (2) comprises adjustable resistance W1, adjustable resistance W2, triode BG1, triode BG2 and charging capacitor C2; Two terminations of adjustable resistance W1 are through the filtered both ends of power of current rectifying and wave filtering circuit (1), the base stage of it is adjustable termination triode BG1, the collector electrode of triode BG1 connects through the filtered power positive end of current rectifying and wave filtering circuit (1) electric rectification by adjustable resistance W2, the adjustable termination of adjustable resistance W2 is through the filtered power positive end of current rectifying and wave filtering circuit (1), the emitter of triode BG1 and triode BG2 is ground connection respectively, the base stage of triode BG2 connects the collector electrode of triode BG1, and the collector electrode of triode BG2 connects power positive end behind current rectifying and wave filtering circuit (1) filter rectification by relay J; Diode D2 is connected in parallel on the relay J, prevents that the reverse voltage that relay produces when triode BG2 ends from puncturing triode BG2.The collector electrode of charging capacitor C2 one termination triode BG1, other end ground connection makes the conducting of triode that one time-delay be arranged, and can suppress the utmost point in the short time, the misoperation that the minor fluctuations of voltage causes.Regulate the size of adjustable resistance W1, make triode BG1 conducting when input voltage is higher than 240 volts, the size of adjusting adjustable resistance W2 makes triode BG2 in input voltage conducting during just at 180 volts, ends when being lower than 180 volts.

Claims

1, a kind of regulator with overvoltage, under-voltage protection; it comprises pressure regulation winding L 1, is connected on the accessory power outlet Z of pressure regulation winding L 1 output and the winding L 2 that is coupled with pressure regulation winding L 1; it is characterized in that: the alternating current of winding L 2 outputs is behind current rectifying and wave filtering circuit (1) filter rectification; input to control circuit (2) and cross the size of current of relay J, make the normally opened contact J of relay J with control flows _1-1Closure or disconnection; The normally opened contact J of relay J _1-1With the input that connects pressure regulation winding L 1 after power input socket is connected; The normal normally opened contact J that opens moving K switch 1 and relay J _1-1Connection connects.

2, the regulator with overvoltage, under-voltage protection according to claim 1 is characterized in that: control circuit (2) comprises adjustable resistance W1, adjustable resistance W2, triode BG1, triode BG2 and charging capacitor C2; Two terminations of adjustable resistance W1 are through the filtered both ends of power of current rectifying and wave filtering circuit (1), the base stage of it is adjustable termination triode BG1, the collector electrode of triode BG1 connects power positive end behind current rectifying and wave filtering circuit (1) rectifying and wave-filtering by adjustable resistance W2, the adjustable termination of adjustable resistance W2 is through the filtered power positive end of current rectifying and wave filtering circuit (1), the emitter of triode BG1 and triode BG2 is ground connection respectively, the base stage of triode BG2 connects the collector electrode of triode BG1, and the collector electrode of triode BG2 is by the power positive end of relay J behind current rectifying and wave filtering circuit (1) rectifying and wave-filtering; The collector electrode of charging capacitor C2 one termination triode BG1, other end ground connection.