KR970068109A - Switching power supply circuit - Google Patents

Switching power supply circuit Download PDF

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Publication number
KR970068109A
KR970068109A KR1019960008518A KR19960008518A KR970068109A KR 970068109 A KR970068109 A KR 970068109A KR 1019960008518 A KR1019960008518 A KR 1019960008518A KR 19960008518 A KR19960008518 A KR 19960008518A KR 970068109 A KR970068109 A KR 970068109A
Authority
KR
South Korea
Prior art keywords
direct current
rectifier
power supply
voltage
smoothing circuit
Prior art date
Application number
KR1019960008518A
Other languages
Korean (ko)
Other versions
KR100187638B1 (en
Inventor
홍문헌
김종식
Original Assignee
곽정소
한국전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 곽정소, 한국전자 주식회사 filed Critical 곽정소
Priority to KR1019960008518A priority Critical patent/KR100187638B1/en
Publication of KR970068109A publication Critical patent/KR970068109A/en
Application granted granted Critical
Publication of KR100187638B1 publication Critical patent/KR100187638B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

본 발명은 스위칭 전원 회로에 관한 것으로서, 특히 회로 구성이 간단하여 부피 및 무게를 줄일 수 있고, 발열 또한 적으며, 직류 출력 전원의 변동에 따른 시간지연을 감소 할 수 있는 스위칭 전원 회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching power supply circuit and, more particularly, to a switching power supply circuit capable of reducing a volume and a weight, reducing heat generation, and reducing a time delay due to variation in a DC output power supply.

본 발명은 교류 전원에서 제공하는 교류 전압을 직류 전압으로 변환하는 제1정류기 ; 상기 정류기에서 교류를 직류로 변환할 때의 변동분을 흡수하고 직류를 출력하는 제1평활 회로부; 상기 평활 회로부에서 맥류가 제거된 직류분을 필요한 전압으로 변환하는 변압기; 상기 변압기의 1차측 전압을 제어 신호에 응답하여 접지로 패스하는 스위칭 소자와; 상기 스위칭 소자에 의해 상기 변압기에서 제공된 펄스 형태의 2차 전압을 직류로 변환하는 제2정류기; 상기 제2정류기에서 출력된 맥류분을 흡수하여 직류를 출력하는 제2평할 회로부; 및 상기 제2평활 회로부에서 출력된 직류분의 변동을 검출한 오차 신호로 비교기를 거치지 않고 직접 발진 주파수와 충격계수의 변화를 직률 출력이 안정화되도록 제어하여 상기 스위칭 소자에 구형파의 제어신호를 출력하는 제어 회로부를 구비한 것을 특징으로 한다.The present invention relates to a rectifier for rectifying an alternating-current voltage supplied from an alternating-current power supply to a direct-current voltage; A first smoothing circuit for absorbing a variation when the rectifier converts an alternating current into a direct current and outputting a direct current; A transformer for converting a direct current component of the smoothing circuit portion into a required voltage; A switching element for passing the primary voltage of the transformer to ground in response to a control signal; A second rectifier for converting the secondary voltage of the pulse form provided by the transformer into direct current by the switching element; A second smoothing circuit for absorbing pulsating current outputted from the second rectifier and outputting a direct current; And outputting a control signal of a square wave to the switching element by controlling the change of the direct oscillation frequency and the duty factor so that the direct output is stabilized without passing through the comparator as the error signal which detects the variation of the direct current outputted from the second smoothing circuit And a control circuit unit.

Description

스위칭 전원 회로Switching power supply circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 종래의 스위칭 방식 전원 회로의 블록도, 제3도는 본 발명에 따른 스위칭 방식 전원 회로의 블록도, 제4도는 본 발명에 따른 스위칭 방식 전원 회로의 상세 회로도.FIG. 2 is a block diagram of a conventional switching power supply circuit, FIG. 3 is a block diagram of a switching power supply circuit according to the present invention, and FIG. 4 is a detailed circuit diagram of a switching power supply circuit according to the present invention.

Claims (2)

교류 전원에서 제공하는 교류 전압을 직류 전압으로 변환하는 제1정류기; 상기 정류기에서 교류를 직류로 변환할 때의 변동분을 흡수하고 직류를 출력하는 제1평활 회로부; 상기 평활 회로부에서 맥류가 제거된 직류분을 필요한 전압으로 변환하는 변압기; 상기 변압기의 1차측 전압을 제어 신호에 응답하여 접지로 패스하는 스위칭 소자와; 상기 스위칭 소자에 의해 상기 변압기에서 제공된 펄스 형태의 2차 전압을 직류로 변환하는 제2정류기; 상기 제2정류기에서 출력된 맥류분을 흡수하여 직류를 출력하는 제2평할 회로부; 및 상기 제2평활 회로부에서 출력된 직류분의 변동을 검출한 오차신호로 비교기를 거치지 않고 직접 발진 주파수와 충격계수를 직류출력이 안정화되도록 제어하여 상기 스위칭 소자에 구형파의 제어신호를 출력하는 제어 회로부를 구비한 것을 특징으로 하는 스위칭 전원 회로.A first rectifier for converting an AC voltage provided from an AC power source into a DC voltage; A first smoothing circuit for absorbing a variation when the rectifier converts an alternating current into a direct current and outputting a direct current; A transformer for converting a direct current component of the smoothing circuit portion into a required voltage; A switching element for passing the primary voltage of the transformer to ground in response to a control signal; A second rectifier for converting the secondary voltage of the pulse form provided by the transformer into direct current by the switching element; A second smoothing circuit for absorbing pulsating current outputted from the second rectifier and outputting a direct current; And a control circuit for directly outputting a rectangular wave control signal to the switching element by controlling the oscillation frequency and the duty factor so that the direct current output is stabilized without passing through the comparator as an error signal that detects the fluctuation of the direct current output from the second smoothing circuit, And a power supply circuit for supplying power to the switching power supply circuit. 제1항에 있어서, 상기 제어 회로부는 상기 제2평활 회로부에서 출력된 직류 출력의 변동분을 검출하는 오차 검출부; 및 상기 오차 검출부의 출력으로 직접 발진 주파수와 충격계수를 직류 출력이 안정화하도록 제어하여 상기 스위칭 소자에 구형파의 제어신호를 출력하는 구형파 발진 회로부를 구비한 것을 특징으로 하는 스위칭 전원 회로.The apparatus of claim 1, wherein the control circuitry includes: an error detector for detecting a variation in the DC output output from the second smoothing circuit; And a rectangular wave oscillation circuit unit for controlling the oscillation frequency and the duty ratio of the output of the error detection unit so that the direct current output is stabilized and outputting a rectangular wave control signal to the switching device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960008518A 1996-03-27 1996-03-27 A switching power supply KR100187638B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960008518A KR100187638B1 (en) 1996-03-27 1996-03-27 A switching power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960008518A KR100187638B1 (en) 1996-03-27 1996-03-27 A switching power supply

Publications (2)

Publication Number Publication Date
KR970068109A true KR970068109A (en) 1997-10-13
KR100187638B1 KR100187638B1 (en) 1999-06-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960008518A KR100187638B1 (en) 1996-03-27 1996-03-27 A switching power supply

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KR100187638B1 (en) 1999-06-01

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