• 제목/요약/키워드: Non-dissipative snubber

검색결과 14건 처리시간 0.034초

무손실 스너버적용 소프트 스위칭 Single Stage AC-DC Full Bridge Boost 캔버터 (Soft Switching Single Stage AC-DC Full Bridge Boost Converter Using Non-Dissipative Snubber Circuits)

  • 김은수;김태진;조기연;김윤호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 하계학술대회 논문집 F
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    • pp.1989-1992
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    • 1997
  • A new soft switching single stage AC-DC full bridge boost converter with unit input power factor and isolated output is presented. Due to using of the non-dissipative snubber in the primary side, a single stage high-power factor isolated full bridge boost converter has a significant reduction of switching losses in main switching devices and output rectifiers of the primary and secondary side, respectively. The non-dissipative snubber adopted in this study is consisted of a snubber capacitor C. and a snubber inductor $L_r$, a fast recovery snubber diode $D_r$, a commutation diode $D_p$. This paper presents the complete operating principles, theoretical analysis and simulation results.

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0.5보다 큰 시비율로 동작하는 전류원 하프-브릿지 컨버터의 무손실 스너버 설계 (Design of Non-Dissipative Snubber for Current-Fed Half-bridge Converter Operating at Duty Ratio above 0.5)

  • 강정일;한상규;윤현기;김정은;윤명중;김윤호
    • 전력전자학회논문지
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    • 제7권5호
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    • pp.405-412
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    • 2002
  • 전류원 브릿지 회로방식은 전압원 회로방식에 비해 스위치 차단 시 발생하는 전압 스파이크에 연루되는 에너지가 커 고효율로 동작하는 무손실 스너버가 필수적인데, 이 스너버는 그 동작원리가 복잡하고 동작조건이 바뀜에 따라 성능의 변동이 심하여 설계가 어려운 문제가 있다. 본 논문에서는 0.5 이상의 시비율로 동작하는 전류원 하프-브릿지 컨버터를 위한 무손실 스너버의 동작을 완전히 분석하고 설계사항에 대해 고찰한 뒤 실험을 통해 검증한다

고속 스위칭 및 고 전력밀도 강압형 컨버터를 위한 무손실 스너버 (Non-Dissipative Snubber for High Switching Frequency and High Power Density Step-Down Converters)

  • 신정민;박철완;한상규
    • 전력전자학회논문지
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    • 제22권4호
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    • pp.345-352
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    • 2017
  • In this paper, a non-dissipative snubber for reducing the switching losses in the step down converter is proposed. The conventional step down converter, e.g., buck converter, suffers from serious switching losses and consequentially heat generation because of its hard switching. Thus, it is unsuitable for high switching frequency operation. Reduction of the reactive components' size, such as an output inductor and capacitor, is difficult. The proposed snubber can slow down the increasing current slopes and switch voltage at turn-on and turn-off transients, thereby significantly reducing the switching loses. Additionally, the slowly increasing current during switch turn-on transition, can effectively solve the output rectifier diode reverse recovery problem. Therefore, the proposed non-dissipative snubber not only leads to the efficiency of converter operation at high switching frequency but also reduces the reactive components size in proportion to the switching frequency. To confirm the validity of the proposed circuit, theoretical analysis and experimental results from a 150 W, 1 MHz prototype are presented.

무손실 스너버 적용 소프트 스위칭 Single Stage AC-DC Full Bridge Boost 컨버터 (Soft Switching Single Stage AC-DC Full Bridge Boost Converter Using Non-Dissipative Snubber)

  • 김은수;조기연;김윤호;조용현;박경수;안호균;박순구
    • 전력전자학회논문지
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    • 제4권4호
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    • pp.377-383
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    • 1999
  • 종래의 충전기 및 통신용 전원장치에 있어서 입력 역률을 개선시키기 위해 고 역률 컨버터(Power Factor Correction Circuit)가 제안되어 적용되고 있고, 이들 대부분 회로는 Hard Switching을 이용한 정류회로로, 입력역률 1제어와 입력전류를 정현파형을 만들 수 있지만 Switching Noise에 의한 전자파장해(EMI)와 스위칭손실 등의 문제를 안고 있다. 또한, 절연된 DC 출력전압을 얻기 위해서는 고 역률 컨버터 후단에 절연된 DC/DC 컨버터가 적용되어야 함으로써, 주 회로 및 제어회로가 다단으로 구성되는 등 복잡화되는 단점이 있었다. 본 논문에서는 이러한 단점을 극복하기 위해 역률보정회로(PFC)를 갖는 절연된 Single Stage 무손실 스너버적용 고주파 소프트 스위칭 컨버터를 제안하고자 한다.

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무손실 스너버를 적용한 고역률, 고효률 AC/DC Boost 컨버터에 관한 연구 (A Study on the High-Power-Factor, High-Efficiency AC/DC Boost Converter with Non-Dissipative Snubber)

  • 배진용;김용;백수현;권순도
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.112-115
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    • 2002
  • Previous AC/DC PFC Boost Converter perceives feed forward signal of input and feedback signal of output for average current-mode control. Previous Boost Converter, the quantity of input current will be decreased by the decrease of output current in light load, and also power factor comes to be decreased. Also the efficiency of converter will be decreased by the decrease of power factor. The proposed converter presents the good PFC(Power Factor Correction), low line current hormonic distortions and tight output voltage regulations using non-dissipative snubber. The proposed converter also has a high efficiency by non-dissipative snubber circuit. To show the superiority of this converter is verified through the experiment with a 640W, 100kHz prototype converter.

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소프트 스위칭 Single Stage AC-DC Full Bridge Boost 컨버터 (Soft Switching Single Stage AC-DC Full Bridge Boost Converter)

  • 김은수;조기연;김윤호;조용현;박경수;안호균;박경수
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.493-496
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    • 1999
  • A new soft switching single stage AC-DC full bridge boost converter with unit input power factor and isolated output is presented in this paper. Due to the use of a non-dissipative snubber on the primary side, a single stage high-power factor isolated full bridge boost converter has a significant reduction of switching losses in the main switching devices. The non-dissipative snubber adopted in this study consists of a snubber capacitor Cr, a snubber inductor Lr, a fast recovery snubber diode Dr, and a commutation diode Dr, and a commutation diode Dp. This paper presents the complete operating principles, theoretical analysis and experimental results.

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탭-인덕터 적용 무손실 스너버에 의한 Buck 컨버터 (Buck converter using a non-dissipative snubber)

  • 박성수;공영수;양승철;김은수
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2003년도 추계학술대회 논문집
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    • pp.154-158
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    • 2003
  • This paper presents an improved soft switching buck converter using a non-dissipative snubber, which is composed of a tapped inductor, two snubber capacitors and three snubber diodes. The proposed buck converter achieves zero voltage turn-off in the main switch and freewheeling diode. The Proposed Soft Switching buck converter is verified through the simulation, relevant equations, analysis and experimental results.

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무손실 스너버 적용 소프트 스위칭 Forward 컨버터 (Soft Switching Forward Converter Using Non-Dissipative Snubber)

  • 김은수;김태진;최해영;조기연;김윤호
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1997년도 전력전자학술대회 논문집
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    • pp.256-260
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    • 1997
  • To achieve high efficiency in high power and high frequency applications, reduction of switching losses and noise is very important. In this paper, an improved soft switching forward converter is proposed. The proposed converter is constructed by using non-dissipative snubbers in parallel with the main switch and output diode of the conventional forward converter. Due to the use of the non-dissipative snubbers in the primary and secondary, the proposed converter achieves zero-voltage and zero-current switching for all switching devices without switching losses and output diode recovery losses. The complete operating principles, theoritical analysis, experimental results will be presented.

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개선된 영전압 스위칭 액티브 클램프 포워드 컨버터 (An Improved ZVS Active Clamp Forward Converter)

  • 최선호;이현관;김은수
    • 전력전자학회논문지
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    • 제10권3호
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    • pp.302-311
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    • 2005
  • 본 논문에서는 액티브 클램프 포워드컨버터 2차 측에 탭-인덕터와 스너버 커페시터, 두 개의 다이오드로 구성된 무손실 스너버를 적용한 개선된 액티브클램프 포워드컨버터를 제안하였고, 종래의 컨버터와 비교하여 제안된 컨버터가 보다 적은 자화전류조건에서도 영전압 스위칭(ZVS)이 가능함을 보였다. 제안된 컨버터의 동작원리 및 모드를 분석하였고, 300W출력용량의 컨버터 시제품을 제작 실험하여 제안된 컨버터의 효율특성이 개선됨을 보였다.

탭-인덕터적용 무손실 스너버에의한 소프트스위칭 Buck 컨버터 (Soft Switching Buck Converter Using Non-dissipative Snubber)

  • 김은수;박성수;공영수;최선호;강도현;조기연;이진수
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2002년도 추계학술대회 논문집
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    • pp.133-136
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    • 2002
  • This paper presents m improved soft switching Buck converter using an energy recovery snubber which is composed of a tapped inductor, two snubber capacitors and three snubber diodes. The proposed Buck converter achieves zero voltage turn-of in the main power switch md freewheeling diode. The operating Principle of the Proposed Buck converter is described through the simulation, relevant equation and analysis.

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