KR960032850A

KR960032850A - Very simple 110 / 220V voltage automatic changer

Info

Publication number: KR960032850A
Application number: KR1019950002117A
Authority: KR
Inventors: 조규형; 임춘택
Original assignee: 조규형; 임춘택
Priority date: 1995-02-04
Filing date: 1995-02-04
Publication date: 1996-09-17

Abstract

본 발명은 110/220V 겸용 전자 제품에 있어서 전압 자동 절환 장치에 관한 것으로서, 기존의 전압 자동 절환장치가 릴레이나 IC등을 사용함으로써 회로가 복잡하고 단가가 높았던 데 비해, TRIAC과 트랜지스터 등 14개의 값싼 부품만으로 회로를 구성하여 회로가 매우 단순하고 단가가 현저하게 낮아지는 것을 특징으로 하고 있다.The present invention relates to a voltage automatic switching device for a 110 / 220V combined electronic product. The conventional voltage automatic switching device uses a relay or an IC, so that the circuit is complicated and the unit price is high. The circuit is composed of only parts, so the circuit is very simple and the unit cost is significantly lowered.

이 장치는 제너 다이오드로써 교류 입력 전압이 110V인자 220V인지를 구분해 내고 최초 전원 투입시나 순간 정전 발생시 TRIAC을 차단상태에 놓이게 하여 회로가 보호되는 기능을 갖고 있어서 실용상 발생할 수 있는 문제점을 간단한 회로로써 해결하고 있다. 이 장치는 단가 때문에 채택되지 못했던 대부분의 전자제품에 사용되어 전원전압(110V/220V)과 무관하게 전자제품이 작동될 수 있도록 하여 편리함과 더불어 전압절환 부주의에 따른 장비 소손을 방지할 수 있다. 또한 이미 수동식 전압 절환 장치가 장착되어 있는 기존 제품의 경우 손쉽게 본 장치를 설치하여 개조가 용이한 장점도 있다.This device is a Zener diode that distinguishes whether AC input voltage is 110V or 220V and puts the TRIAC in the blocking state when the power is first supplied or when a power failure occurs. I'm solving it. This device is used for most electronic products that could not be adopted due to the unit price, so that the electronics can be operated regardless of the power supply voltage (110V / 220V), and it is possible to prevent equipment damage due to voltage switching carelessness. In addition, the existing product already equipped with a manual voltage switching device has the advantage of easy installation and retrofitting the device.

Description

Very simple 110 / 220V voltage automatic changer

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

도면은 본 장치의 회로도The drawing shows the circuit diagram of the device

Claims

The power supply voltage is rectified through diodes (D ⁵ , D ⁶ ) and smoothed (C ¹ , C ² ) to be turned on when AC 110V is turned on, and is turned ON when 220V is turned on when AC 220V is applied through Zener diode (ZD ¹ ). There is a transistor (Q), and when the transistor is OFF and the voltage of the capacitor (C ² ) is slightly larger than the zener diode (ZD ² ) voltage has a structure to make the TRIAC in a conductive state, but the resistance at the first power-on The time constant by (R ⁴ ) and condenser (C ² ) keeps TRIAC in a blocking state for a certain period of time, preventing malfunction due to inrush current and initial input voltage. Q) The time constant (C ¹ ) (R ² ) (R ¹ ) of the base side circuit is many times larger than the time constant (C ² ) (C ³ ) (R ⁴ ) (R ₅ ) of the collector side circuit. Transistor until TRIAC is cut off because the voltage at (C ² ) is lowered The function to prevent the TRIAC malfunction caused by a momentary power failure by keeping (Q) ON and reliably putting the TRIAC in a blocking state. voltage (110 / 220V) than the DC output voltage all the time regardless of (V ⁺ -V ^-) voltage auto changer has a constant characteristic.

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