• 제목/요약/키워드: snubber

검색결과 411건 처리시간 0.028초

FB DC-DC Converter의 도전손실 저감과 무손실 스너버 회로에 관한 연구 (A Study on Reducing Conduction Losses and Lossless Snubber Circuit of Full-Bridge DC-DC Converter)

  • 라병훈;이현우;권순걸;김준홍;서기영;우정인
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 F
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    • pp.2665-2667
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    • 1999
  • This Paper proposes a new toplogy snubber circuit of Full-Bridge DC-DC Converter for reducing conduction losses and snubber circuit heating loss. Using Partial Resonent Soft Switching Method and Clamping, studying on a new snubber circuit for reducing losses that a snubber circuit heating loss in the secondly diode rectification side, a switching losses in the primary side of IGBT inverter and conduction losses in the high frequency insulation transformer. In this paper, we present FB DC-DC converter included a new lossless snubber circuit, and then be analyzed and simulated.

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High-Power-Factor Boost Rectifier with a Passive Energy Recovery Snubber

  • Kim, Marn-Go;Baek, Seung-Ho
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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    • pp.668-676
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    • 1998
  • A passive energy recovery snubber for high-power-factor boost rectifier, in which the main switch is described in terms of the equivalent circuits that are operational during turn-on and turn-off sequences. These equivalent circuits are analyzed so that the overshoot voltage across the main switch, the snubber current, and the turn-off transition time can be predicted analytically. The main switch combined with proposed snubber can be turned on with zero current and turned off at limited voltage stress. The high-power-factor boost rectifier with proposed snubber is implemented, and the experimental results are presented to confirm the validity of proposed snubber.

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무손실 스너버회로를 이용한 새로운 소프트 스위칭 AC-DC승압형 컨버터 (The new Soft-Switching AC-DC Boost Type Converter using Lossless Snubber)

  • 문상필;서기영;김영문
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 B
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    • pp.1226-1228
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    • 2004
  • A novel lossless passive snubber is proposed for soft switching the boost type converters. The proposed snubber does not use any auxiliary switches. but uses two identical snubber capacitors which are charged in parallel at turn off of the main switch and discharged in series at turn on automatically, and the discharged energy is recovered effectively (more than $95[\%]$ recovery) into the output capacitor. Thus, the snubber provides zero voltage switching for the converter main switch, reducing both the turn off losses and the electromagnetic interference(EMI) noise, whitch improves the converter performance. The experimental results of a 20[kHz] 600[W] DC-DC boost converter and a single-phase AC-DC boost rectifier with the new snubber are presented.

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태양광 최대 전력 추종기를 위한 고효율 무손실 스너버 (High Efficiency Lossless Snubber for Photovoltaic Maximum Power Point Tracker)

  • 장두희;강정일;한상규
    • 전력전자학회논문지
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    • 제18권5호
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    • pp.485-491
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    • 2013
  • A new passive lossless snubber for boost converter based on magnetic coupling is proposed. It is composed of a winding coupled with boost inductor, one snubber inductor, two snubber capacitor and three additional diodes. Especially, the snubber inductor can not only limit the reverse recovery current of output diode but also minimize switch turn-on losses greatly. Moreover, all of the energy stored in the snubber is transferred to the load in the manner of resonance. To confirm the validity of proposed system, theoretical analysis, design consideration, and verification of experimental results are presented.

Soft-Switching Boost Chopper Type DC-DC Power Converter with a Single Auxiliary Passive Resonant Snubber

  • Nakamura Mantaro;Myoui Takeshi;Abudullh Al Mamun;Nakaoka Mutsuo
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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    • pp.256-260
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    • 2001
  • This paper presents boost and buck and buck-boost DC-DC converter circuit topologies of high-frequency soft switching transition PWM chopper type DC-DC high power converters with a single auxiliary passive resonant snubber. In the proposed boost power converter circuits operating under a principle of ZCS turn-on and ZVS turn-off commutation schemes, the capacitor and inductor in the auxiliary passive resonant circuit works as the loss less resonant snubber. In addition to this, the switching voltage and current peak stresses as well as EMI and RFI noises can be basically reduced by this single passive resonant snubber. Moreover, it is proved that converter circuit topologies with a passive resonant snubber are capable of solving some problems of the conventional hard switching PWM processing based on high-ferquency pulse modulation operation principle. The simulation results of this converter are discussed as compared with the experimental ones. The effectiveness of this power converter with a single passive resonant snubber is verified by the 5kW experimental breadboad set up.

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Soft-Switching PWM Boost Chopper-Fed DC-DC Power Converter with Load Side Auxiliary Passive Resonant Snubber

  • Nakamura, Mantaro;Ogura, Koki;Nakaoka, Mutsuo
    • Journal of Power Electronics
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    • 제4권3호
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    • pp.161-168
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    • 2004
  • This paper presents a new circuit topology of high-frequency soft switching commutation boost type PWM chopper-fed DC-DC power converter with a loadside auxiliary passive resonant snubber. In the proposed boost type chopper-fed DC-DC power converter circuit operating under a principle of ZCS turn-on and ZVS turn-off commutation, the capacitor and inductor in the auxiliary passive resonant circuit works as the lossless resonant snubber. In addition to this, the voltage and current peak stresses of the power semiconductor devices as well as their di/dt or dv/dt dynamic stress can be effectively reduced by the single passive resonant snubber treated here. Moreover, it is proved that chopper-fed DC-DC power converter circuit topology with an auxiliary passive resonant snubber could solve some problems on the conventional boost type hard switching PWM chopper-fed DC-DC power converter. The simulation results of this converter are illustrated and discussed as compared with the experimental ones. The feasible effectiveness of this soft witching DC-DC power converter with a single passive resonant snubber is verified by the 5kW, 20kHz experimental breadboard set up to be built and tested for new energy utilization such as solar photovoltaic generators and fuel sell generators.

Effect of Snubber-Array on Variation of Pressure Characteristics in Reciprocating Hydrogen Compression

  • Chung, Han-Shik;Rahman, M. Sq.;Lee, Gyeong-Hwan;Jin, Zhenhua;Kim, Jeong-Hyeon;Jeong, Hyo-Min
    • Journal of Advanced Marine Engineering and Technology
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    • 제33권7호
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    • pp.1034-1043
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    • 2009
  • Hydrogen energy is becoming popular day by day due to its renewability and pollutaaant free natures. Hydrogen gas pressure which is after passing through reciprocating compressor part has high pulsation wave form. A unit, snubber is used as compressor components to reduce the harmful pulsation waveform and to remove the impurities in the hydrogen gas. An experiment has been conducted to investigate the pulsation reduction performance of different arrangement of snubber i.e. snubber array used in reciprocating compression system. Analyzing the snubber array experimental data, it is found that the pressure fluctuations are reduced from 90.1977% ~ 92.6336% with pressure loss 1.5013% ~ 4.9034% for compressor operation at different speed which ensure the good performance of snubber-array as pulsation damper in hydrogen compressing system.

GTO 스너버 회로 설계에 관한 연구 (Design Considerations and Criteria of GTO Snubber Circuit)

  • 서재형;서범석;현동석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.376-378
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    • 1994
  • The turn-off behavior of the GTO Thyristor by its nature differs very much from that of other power f semiconductor switching devices. So canful attention should be paid in designing the GTO snubber circuit. This paper presents the effect of turn-off snubber circuit elements on the switching characteristics of the GTO, and describes considerations and criteria for the selection of the snubber component values.

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스누버 전류를 고려한 개선된 SVPWM 인버터를 이용한 상전류센서없는 전동기 구동 (Single Current Sensor Technique considering a Snubber Current and a Modified SVPWM Inverter for AC Motor Drives)

  • 주형길;신휘범;안희욱;윤명중
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.399-402
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    • 1999
  • The single sensor technique reconstructing phase currents from the dc-link current without phase current sensors in proposed. When the duration of active vector is too short for the snubber current to reduce, the dc-link current including the snubber current gives large detection error. The solution is presented by analyzing the snubber current and modifying the switching sequences. This scheme is simple, requires only one sampling a period and has good results for detecting the phase currents.

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Performance Evaluations of Digitally-Controlled Auxiliary Resonant Commutation Snubber-Assisted Three Phase Voltage Source Soft Switching Inverter

  • Hiraki, Eiji;Nakaoka, Mutsuo
    • Journal of Power Electronics
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    • 제3권1호
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    • pp.1-9
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    • 2003
  • This paper presents a performance analysis of typical Auxiliary Resonant Commutation Snubber-assisted three phase voltage source soft switching inverter which can operate under a condition of Zero Voltage Switching (ZVS) using a digital control scheme which is suitable for high power applications compared with resonant DC link snubber assisted soft switching inverter. The system performances of this inverter are illustrated and evaluated on the basis of experimental results.