KR940004921A

KR940004921A - Power circuit

Info

Publication number: KR940004921A
Application number: KR1019920015228A
Authority: KR
Inventors: 우종진
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1992-08-24
Filing date: 1992-08-24
Publication date: 1994-03-16

Abstract

본 발명은 스파이크성 노이즈제거와 콘덴서의 수명 연장 및 입력 전력 대 전원 회로의 사용 전력 비율을 높일수 있는 전원 회로에 관한 것으로, 전원 회로의 브릿지 다이오드 후단의 큰 용량 콘덴서로 인한 돌입 전류와 이로 인한 콘덴서의 손실 증가 그리고 실질적인 사용 전력이 낮아지는 것을 해결하는 것을 기술적 과제로 하며, 정류부의 브릿지 다이오드 후단에 연결한 큰 용량 콘덴서의 용량을 줄여 돌입 전류를 방지하고, 전압 전류의 위상을 동일하게 유지함으로써 입력 전력에 대한 전원회로의 사용 전력량을 크게 하며, 전압 전류 파형이 “0″으로 지점에서 스위칭하여 출력 리플전압이 증가하는 것을 방지하기 위해 스위칭 트랜지스터의 오프 기간에 에너지 저장부에 저장된 에너지를 사용함으로써, 입력 전압이 저장된 전압보다 낮을 경우 저장된 에너지를 트랜스부로 공급하여 줌으로 항상 일정 이상의 에너지를 2차측으로 공급하는 것을 요지로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit capable of eliminating spike noise, extending the life of a capacitor, and increasing the power ratio of an input power to a power supply circuit. The technical problem is to solve the increase of the loss and the decrease of the actual power consumption.The input power is reduced by preventing the inrush current by keeping the capacity of the large capacitor connected to the bridge diode of the rectifying part. By using the energy stored in the energy storage in the off-period of the switching transistor to increase the amount of power used by the power supply circuit for the power supply and to prevent the output ripple voltage from increasing at the point where the voltage current waveform switches to "0". Low when the voltage is lower than the stored voltage By the supply of energy to the base portion and transformer to always supply more than the predetermined energy to the secondary side with the zoom.

Description

Zeven Hoir

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

제5도는 본 발명의 전원 회로도,5 is a power supply circuit diagram of the present invention;

제6도는 제5도에 대한 평활부(2)의 전압, 전류파형도,FIG. 6 shows the voltage, current waveform diagram of the smoothing unit 2 with respect to FIG.

제7도는 제5도에 대한 전압 비교 파형도,7 is a voltage comparison waveform diagram of FIG.

제8도는 제5도에 대한 비교 파형도.8 is a comparison waveform diagram of FIG.

Claims

And a rectifying unit (1) for full-wave rectifying to convert an AC force to direct current. The smoothing unit 2 for removing the ripple component from the full-wave rectified DC waveform in the rectifying unit 1 and the DC power smoothed in the smoothing unit 2 are turned on / off by the switching transistor Q ₁ . A transformer 3 for transferring the primary side T ₁₁ energy to the secondary side T ₁₂ and a switching transistor Q ₁ for delivering a constant energy to the secondary side T ₁₂ of the transformer unit 3. A control unit 4 for controlling the on / off operation of the control unit, an energy storage unit 5 storing energy through the winding of the tertiary side T ₁₃ of the transformer unit 3 when the switching transistor Q1 is turned off, and And a switching unit 6 for supplying energy stored in the energy storage unit 5 to the primary side T ₁₁ winding of the transformer unit 3, and an output V ₂ of the energy storage unit 5. and a smoothing part (2) other than the output (V ₁₎ and a comparison unit (7) for comparing the voltage on the switching unit (6) according to an output signal of the comparison unit (7) on / off copper Power supply circuit characterized in that it consists of and-arithmetic unit (8) for outputting a determination signal to control.

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