• 제목/요약/키워드: zero-voltage-switching (ZVS)

검색결과 438건 처리시간 0.023초

새로운 2상 Switched Reluctance Motor용 Zero-Voltage Switching Converter

  • 김형준;이근홍;신홍철;김병한;윤희수;배한경
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2012년도 전력전자학술대회 논문집
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    • pp.291-292
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    • 2012
  • 본 논문에서는 고속회전 모터응용을 위한 새로운 2상 SRM용 ZVS 컨버터를 제안한다. 제안한 컨버터는 모든 스위치에서 Zero-Voltage Switching이 가능하고, 기존 토폴로지에 비해 소자수가 작으며, 각 상간의 자연스러운 에너지 전달에 의해 토크 리플을 줄일 수 있다. 제안하는 컨버터의 동작원리를 설명하였고 기존 컨버터와의 비교 분석을 수행하였으며 시뮬레이션을 통해 본 방식의 타당성을 검증하였다.

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Dual Active Bridge 컨버터의 인덕터 설계 (Inductor design of Dual Active Bridge Converter)

  • 오영진;김성민
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2019년도 전력전자학술대회
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    • pp.485-486
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    • 2019
  • 본 논문에서는 정격부하에서 효율이 가장 높으면서 동시에 Zero Voltage Switching(ZVS)를 만족하는 인덕터를 설계하는 방법을 제안한다. 제안하는 인덕터 설계 방법은 주어진 정격에서 스위치에 존재하는 스너버 캐패시터를 고려한 ZVS 식을 구하며, 스위치의 특성을 고려한 Dead-time을 설계하고 이를 통해 인덕턴스를 최소화 한다. 시뮬레이션을 통해 스너버 캐패시터의 전압 파형 및 스위치의 손실을 비교하였다.

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전압 리플을 이용해 영전류스위칭하는 두개의 트랜스포머를 가지는 위상천이 풀-브릿지 컨버터 (Zero-Current Switching Two-Transformer Phase-Shift Full-Bridge Converter using Voltage Ripple)

  • 윤현기;문건우;윤명중
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.436-438
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    • 2005
  • This paper presents a Zero-Current Switching(ZCS) two-transformer phase-shift full-bridge(TTFB) converter using voltage ripple. The proposed converter provides Zero-Voltage Switching(2VS) of leading leg switches and ZCS of lagging leg switches using volt-age ripple. Especially, circulating current Is reduced by ZCS operation and there are no additional components required for the soft switching of power switches. Furthermore, in case of light load, ZVS operation of lagging leg can be achieved. The operations, analysis and design consideration of proposed converter are presented. To verify the validity of the proposed converter, experimental results for a flow (205V, 2A) prototype are presented.

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1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계 (The Driving Circuit Design for ZVS Full-Bridge Converter with 1st Order Delay Circuit)

  • 조내수;최연호;윤경섭;구본호;권우현
    • 전기학회논문지
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    • 제59권3호
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    • pp.569-574
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    • 2010
  • The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred. The Soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS: Zero Voltage Switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with 1st order delay circuit and logic elements. The realization of this method is so simple and cheap. The effectiveness of the proposed circuit is verified by experimental results.

ZVS-PWM Boost Chopper-Fed DC-DC Converter with Load-Side Auxiliary Edge Resonant Snubber and Its Performance Evaluations

  • Ogura, Koki;Chandhaket, Srawouth;Ahmed, Tarek;Nakaoka, Mutsuo
    • Journal of Power Electronics
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    • 제4권1호
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    • pp.46-55
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    • 2004
  • This paper presents a high-frequency ZVS-PWM boost chopper-fed DC-DC converter with a single active auxiliary edge resonant snubber in the load-side which can be designed for power conditioners such as solar photovoltaic generation, fuel cell generation, battery and super capacitor energy storages. Its principle operation in steady-state is described in addition to a prototype setup. The experimental results of ZVS-PWM boost chopper-fed DC-DC converter proposed here, are evaluated and verified with a practical design model in terms of its switching voltage and current waveforms, the switching v-i trajectory, the temperature performance of IGBT module, the actual power conversion efficiency and the EMI of radiated and conducted emissions. And then discussed and compared with the hard switching scheme from an experimental point of view. Finally, this paper proposes a practical method to suppress parasitic oscillation due to the active auxiliary resonant switch at ZCS turn off mode transition with the aid of an additional lossless clamping diode loop, and reduced the EMI conducted emission in this paper.

Soft Switching방식 고역률 강압형 컨버터 (Soft Switching High Power Factor Buck Converter)

  • 구헌회;조기연
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1997년도 전력전자학술대회 논문집
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    • pp.243-246
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    • 1997
  • In this paper, soft switching high power factor buck converter is proposed. This converter is composed of diode rectifier, a input capacitor can be small enough to filter input capacitor can be small enough to filter input current, buck converter with loss less snubber circuit. Converter is operated in discontinous conduction mode, turn of of the switching device is a zero current switching(ZCS) and high power factor input is obtained. In addition, zero voltage switching(ZVS) at turn of is achieved and switching loss is reduced using loss less snubber circuit. The capacitor used in the snubber circuit raised output voltage. Therefore, proposed converter has higher output voltage and higher efficiency than conventional buck type converter at same duty factor in discontious conduction mode operation.

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Single Stage Power Factor Correction Using A New Zero-Voltage-Transition Isolated Full Bridge PWM Boost Converter

  • Jeong, Chang.-Y.;Cho, Jung-G.;Baek, Ju-W.;Song, Du-I.;Yoo, Dong-W.
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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    • pp.694-700
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    • 1998
  • A novel zero-voltage-transition (ZVT) isolated PWM boost converter for single stage power factor correction (PFC) is presented to improve the performance of the previously presented ZVT converter[8]. A simple auxiliary circuit which includes only one active switch provides zero-voltage-switching (ZVS) condition to all semiconductor devices. (Two active switches are required for the previous ZVT converter) This leads to reduced cost and simplified control circuit comparing to the previous ZVT converter. The ZVS is achieved for wide line and load ranges with minimum device voltage and current stresses. Operation principle, control strategy and features of the proposed converter are presented and verified by the experimental results from a 1.5 kW, 100 KHz laboratory prototype.

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동기 정류기를 이용한 위상 변위 제어 클램프 모드 포워드 다중 공진형 컨버터 (Phase Shift Controlled GM ZVS-MRC with Synchronous Rectifier)

  • 송종화;김창선;김희준
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 하계학술대회 논문집 F
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    • pp.2016-2019
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    • 1997
  • To solve the low efficiency problem of low-voltage power supplies, it has been studied to replace the schottky barrier diode with the MOSFET synchronous rectifier. In this paper, Phase Shift-Controlled Clamp Mode Zero Voltage Switching-Multi Resonant Converter with Synchronous Rectifier (PSC CM ZVS-MRC with SR) is presented to achieve high efficiency in low-voltage power supplies. The characteristics analysis of synchronous rectifier is established by using the MOSFET equivalent circuit and efficiency comparison is established between the Synchronous Rectifier and the schottky barrier diode. To verify the validity of the analysis, 33W(3.3V, 10A) PSC CM ZVS-MRC with self-driven synchronous rectifier at switching frequency of 1MHz is designed and tested. And it is confirmed that the experimental results are well consistent with the theoretical results. The maximum efficiency of the converter is 83.4% at full load, which is 3.3% higher than conventional schottky diode rectification.

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2.5MHz급 무전극 램프 구동용 ZVS 인버터에 관한 연구 (2.5MHz Zero-Voltage-Switching Resonant Inverter for Electrodeless Fluorescent Lamp)

  • 박동현;김희준;조기연;계문호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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    • pp.339-342
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    • 1996
  • Driving the electrodeless fluorescent lamp, the high ac voltage with high frequency is required. The linear power amplifier has been widely used as a driving circuit of electrodeless fluorescent lamp. However, the low efficiency of the power amplifier causes the driving circuit to be replaced by a PWM switching inverter. In order to use a PWM switching inverter as the driving circuit of an electrodeless fluorescent lamp, the high switching frequency is required. But due to the switching loss at switches of the inverter, the limitation of high switching frequency appears in the inverter. One solution to this limitation is to reduce the switching loss by using the zero voltage switching technique. In this paper, zero voltage switching resonant inverter for driving an electrodeless fluorescent lamp is discussed. The results of analysis about the inverter are presented and the equations for design are established. And the validity of the analyzed results are verified through the experiment.

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Zero Voltage Switching Boost H-Bridge AC Power Converter for Induction Heating Cooker

  • Kwon, Soon-Kurl;Saha, Bishwajit
    • 조명전기설비학회논문지
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    • 제21권4호
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    • pp.19-27
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    • 2007
  • This paper presents a novel soft-switching PWM utility frequency AC to high frequency AC power conversion circuit incorporating boost H-bridge inverter topology, which is more suitable and acceptable for cost effective consumer induction heating applications. The operating principle and the operation modes are presented using the switch mode equivalent circuits and the operating voltage and current waveforms. The performances of this high-frequency inverter using the latest IGBTs are illustrated, which includes high frequency power regulation and actual efficiency characteristics based on zero voltage soft-switching(ZVS) operation ranges, and the power dissipation as compared with those of the conventional type high frequency inverter. In addition, a dual mode control scheme of this high frequency inverter based on asymmetrical pulse width modulation(PWM) and pulse density modulation(PDM) control scheme is discussed in this paper in order to extend the soft switching operation ranges and to improve the power conversion efficiency at the low power settings. The power converter practical effectiveness is substantially proved based on experimental results from practical design example.