KR960043408A

KR960043408A - Overvoltage cutoff control device

Info

Publication number: KR960043408A
Application number: KR1019950013611A
Authority: KR
Inventors: 송영식
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-05-29
Filing date: 1995-05-29
Publication date: 1996-12-23

Abstract

본 발명은 전기기기에 있어서, AC플로그로부터 교류전원인가시 소정의 정격레벨의 이상의 교류전원이 인가되게 되면 자동으로 과전압차단동작이 행해지게 하여 전기기내의 회로를 보호하도록 된 과전압차단제정장치를 제공하기 위한 것이다.SUMMARY OF THE INVENTION The present invention provides an overvoltage cut-off regulating device which protects a circuit in an electric machine by automatically performing an overvoltage blocking operation when an AC power supply of a predetermined rated level or more is applied when an AC power is applied from an AC plug. It is to.

이를 위해 본 발명은, AC플러그(1)로부터 인가되는 교류전원을 변압하는 트랜스포머(10)와, 상기 변압된 교류전원을 직류전원으로 정류하는 정류부(12), 상기 교류전원이 SMPS회로부(14)로 입력되도록 릴레이를 구동시키는 릴레이구동부(16)를 갖춘 전기기기의 전원공급장치에서, 상기 릴레이구동부(16)는 상기 AC플러그(1)로부터 교류전원입력시 소정시간 경과후에 상기 릴레이를 활성화시키도록 구성되고, 상기 AC플러그(1)로부터 교류전원입력시 상기 교류입력전원의 과전압여부를 검출하는 과전압검출부(18)와, 상기 과전압검출부(18)로부터의 신호에 따라 상기 릴레이구동부(16)의 동작을 제어하게 되는 과전압차단제어부(20)로 구성된 것이다.To this end, the present invention, the transformer 10 for transforming the AC power applied from the AC plug (1), the rectifying unit 12 for rectifying the transformed AC power to a DC power source, the AC power supply SMPS circuit unit 14 In the power supply of the electric machine having a relay driver 16 for driving the relay to be input to the, the relay driver 16 is to activate the relay after a predetermined time when the AC power input from the AC plug (1). And an overvoltage detector 18 which detects whether overvoltage of the AC input power is input when AC power is input from the AC plug 1, and operation of the relay driver 16 according to a signal from the overvoltage detector 18. It is composed of an overvoltage cut-off control unit 20 to control the.

Description

Overvoltage cutoff control device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 일실시예에 따른 과전압차단제어장치의 회로도이다.1 is a circuit diagram of an overvoltage cutoff control apparatus according to an embodiment of the present invention.

Claims

Transformer 10 for transforming the AC power applied from the AC plug 1, rectifier 12 for rectifying the transformed AC power into a DC power source, driving the relay so that the AC power is input to the SMPS circuit unit 14 In the power supply of the electric machine having a relay drive unit 16, the relay drive unit 16 is configured to activate the relay after a predetermined time elapses when the AC power input from the AC plug (1), the AC The overvoltage detector 18 detects whether the AC input power is overvoltage when the AC power is input from the plug 1, and the overvoltage which controls the operation of the relay driver 16 according to a signal from the overvoltage detector 18. Overvoltage cut-off control device, characterized in that consisting of a cutoff control unit (20).

The charging time constant device R1 and C2 of claim 1, wherein the relay driver 16 charges the DC power supply from the rectifier 12 based on a predetermined charging time constant. The rated level element providing a predetermined rated level for the DC power charged in R1 and C2, and the level of the DC power charged in the charging time constant elements R1 and C2 is equal to or greater than the rated level of the rated level device. And a switching transistor (Q1) for switching on to drive the relay.

3. The overvoltage cutoff control device according to claim 2, wherein the rated level element is composed of a zener diode (ZD1).

The voltage divider (R9, R10) according to claim 1, wherein the overvoltage detector (18) has a voltage divider (R9, R10) for dividing the DC power from the rectifier (12), and a predetermined rated level. And an overvoltage detecting device for outputting an overvoltage detection signal when the voltage dividing value from the controller is equal to or higher than the rated level.

5. The overvoltage cutoff control device according to claim 4, wherein the overvoltage detection element is composed of a zener diode (ZD2).

The first and second switching transistors (Q2) and the first switching transistor (2) according to claim 1, wherein the overvoltage cut-off control unit (20) is on / off switching operation according to whether the overvoltage detection signal from the overvoltage detection unit (18) is applied. And a second switching transistor (Q3) which is turned on so that the operation of the relay driver (16) is not performed as long as Q2) is turned on so long as AC power is applied from the AC plug (1).

7. The overvoltage cutoff control device according to claim 6, wherein the polarities of the first and second switching transistors (Q2, Q3) are opposite to each other.

※ Note: The disclosure is based on the initial application.