• Title/Summary/Keyword: Current-fed half-bridge converter

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Efficiency analysis of active-clamped current-fed half-bridge converter (능동 클램프형 전류원 하프브리지 컨버터의 효율 특성 분석)

  • Park, Jin-Ju;Lim, Jeong-Gyu;Chung, Se-Kyo;Song, Yujin
    • Proceedings of the KIPE Conference
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    • 2011.07a
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    • pp.157-158
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    • 2011
  • An active-clamped current-fed half-bridge converter is used for front-end converter for grid-connection of low voltage energy sources. In this paper, theoretical analysis on the loss and efficiency for an active-clamped current-fed half-bridge converter is presented. To analyze the loss of the presented converter, the RMS current of each device is derived and it's loss is calculated. The comparison between simulation result and computed value is presented to verify the validity of the theoretic results.

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Fuel Cell Generation Systems with Active Clamp Current fed Half Bridge Converter (능동 클램프 전류형 하프 브리지 컨버터를 적용한 연료전지 발전시스템)

  • Jang S. J.;Kim J. T.;Lee T. W.;Lee B. K.;Won C. Y.
    • The Transactions of the Korean Institute of Power Electronics
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    • v.10 no.1
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    • pp.78-86
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    • 2005
  • Recently, a fuel cell with low voltage and high current output characteristics is remarkable for new generation system. It needs both a dc-dc boost converter and dc-ac inverter to be used in fuel cell generation system. Therefore, this paper presents dc-dc active clamp current-fed half-bridge converter with ZVS for fuel cell generation system. The proposed converter has outstanding advantages over the conventional dc-dc converters with respect to high efficiency and high component utilization. The Fuel Cell generation system consist of active clamp current-fed half-bridge converter to boost the Fuel Cell(PEMFC) voltage(28∼43[Vdc]) to 380[Vdc]. A single phase full-bridge inverter is implemented to produce 220[Vac], 60[Hz] AC outputs.

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

  • 강정일;한상규;윤현기;김정은;윤명중;김윤호
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.5
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    • pp.405-412
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    • 2002
  • Since the switching device of current-fed bridge-type topology suffers from him-off voltage spikes associated with larger energy than that of voltage-fed topology, a high-efficiency non-dissipative snubber is considered essential. However, the complicated operation and the capricious performance according to various conditions make the design of the non-dissipative difficult. In this paper, the non-dissipative snubber employed in the current-fed half-bridge converter operating at a duty ratio above 0.5 is completely analyzed and the design considerations are discussed. Some design examples and the experimental results are provided to confirm the analysis and design presented in this paper.

Bi-directional DC-DC Converter Design and Control for step-up/step-down (승강압용 양방향 DC-DC컨버터 설계 및 제어)

  • Won, Chung-Yuen;Jang, Su-Jin;Lee, Tae-Won;Lee, Byoung-Kuk;Kim, Soo-Suck
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.5
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    • pp.49-56
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    • 2006
  • The bi-directional converter interfaces the low voltage battery to the inverter do link of FC generation system. When power flows from the low voltage side(battery: 48[V]) to the high voltage side(dc link: 380[V]), the circuit works in discharge mode (boost) to power the high voltage side load; otherwise, it works in charge mode (buck) to charge the low voltage side battery. In this paper, the 1.5[kW] active clamp current-fed full bridge converter employing MOSFETs is operated to discharge the battery whereas a voltage-fed half bridge converter employing IGBTs is operated to charge the battery.

Study On Photovoltaic Module Integrated Converter based on Active Clamp Current-fed Half-Bridge Converter (능동 클램프 전류원 하프 브릿지 기반 태양광 모듈 집적형 전력변환장치에 대한 연구)

  • Jung, Hoon-Young;Park, Jeong-Kyu;Ji, Young-Hyok;Won, Chung-Yuen;Lee, Tae-Won
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.2
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    • pp.105-113
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    • 2011
  • In this paper, photovoltaic module integrated converter (MIC) based on active clamp current-fed half-bridge converter is proposed. The converter stage operates in zero-voltage condition using active clamp technique. The theoretical study and circuit design for proposed inverter are confirmed with PSIM simulator and experimental reusult.

Photovoltaic Module Integrated Converter based on Active Clamp Current-fed Half-Bridge Converter (능동 클램프 전류원 하프 브릿지 기반 태양광 모듈 집적형 전력변환장치)

  • Park, Jeong-Kyu;Jung, Hoon-Young;Ji, Young-Hyok;Lee, Tae-Won;Won, Chung-Yuen
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.563-564
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    • 2010
  • In this paper, photovoltaic module integrated converter (MIC) based on active clamp current-fed half-bridge converter is proposed. The converter stage operates in zero-voltage condition using active clamp technique. The theoretical study and circuit design for proposed inverter are confirmed with PSIM simulator.

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A study on Fuel Cell generation system (연료전지 발전시스템에 관한 연구)

  • Jeong, Dong-Hyo
    • Proceedings of the KIEE Conference
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    • 2008.11b
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    • pp.77-78
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    • 2008
  • Recently, a fuel cell is remarkable for new generation system. The fuel cell generation system converts the chemical energy of a fuel directly into electrical energy. The fuel cell generation is characterized by low voltage and high current. For connecting to utility, it needs both a step up converter and an inverter. The step up converter makes DC link and the inverter changes DC to AC. In this paper, full bridge converter and the single phase inverter are designed and installed for fuel cell. Simulation and experiment verify that fuel cell generation system could be applied for the distributed generation. In this paper, the 1.5kW active clamp current-fed full bridge converter employing MOSFETs is operated to discharge the battery whereas a voltage-fed half bridge converter employing IGBTs is operated to charge the battery.

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Design of Active-Clamped Current-Fed Half-Bridge Converter With Voltage Doubler Output (전압체배 출력을 갖는 능동클램프 하프브리지 전류원 컨버터의 설계)

  • Cho, Kyeong-Sig;Jeong, Jin-Woo;Chung, Se-Kyo;Song, Yu-Jin
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.142-143
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    • 2010
  • An active-clamped current-fed half-bridge converter for the high step-up application is proposed in this paper. The proposed converter is composed of active clamping snubber circuits and a voltage doubler rectifier. The operational principle, theoretical analysis, and design considerations are presented. To confirm the operation, features, and validity of the proposed circuit, the experimental result for a 200W, 24V input and 400V output prototype are presented.

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Active CDS-Clamped L-Type Current-Fed Isolated DC-DC Converter

  • Nguyen, Minh-Khai;Duong, Truong-Duy;Lim, Young-Cheol;Choi, Joon-Ho
    • Journal of Power Electronics
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    • v.18 no.4
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    • pp.955-964
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    • 2018
  • In this paper, an active capacitor-diode-switch (CDS) snubber is proposed for L-type current-fed isolated DC-DC converters. The proposed CDS-clamped converter has a number of advantages. It can achieve wide range zero-voltage switching (ZVS) on two switches, a continuous input current with a low ripple, a reduction of one active switch and high efficiency. The operating principles, analysis and parameter design guideline are presented. A 300 W prototype is built to test the proposed converter. Simulation and experimental results are shown at 30 V input voltage and 400 V output voltage.

Design of a High Power Three-Phase ZVS Push-Pull Converter (대전력 3상 ZVS 푸쉬풀 컨버터 설계)

  • Park, Jun-Sung;Lee, Sang-Won;Choi, Se-Wan
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.3
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    • pp.209-218
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    • 2011
  • In low voltage high current applications such as fuel cells the current-fed DC-DC converter which has small ripple current and turn ratio is more efficient. In the applications larger than 5kW the conventional single-phase current-fed converter based on full-bridge, half-bridge or push-pull topologies has high current burden of devices such as switches, and the selection and optimized design of the devices are not easy. In this paper a three-phase active-clamped current-fed push-pull DC-DC converter suitable for high power high step-up applications is proposed. The proposed converter has reduced current burden and is suitable for wide input voltage applications due to the use of whole duty cycle range. Design methods of main components including three-phase high frequency transformers are provided, and the validity and performance of the proposed converter are proved from a 5kW prototype.