• 제목/요약/키워드: Zeta Converter

검색결과 18건 처리시간 0.026초

개선된 효율을 가지는 양방향 Zeta-Flyback 컨버터 (Bidirectional Zeta-Flyback Converter for Improved Efficiency)

  • 정문규;권영안
    • Journal of Advanced Marine Engineering and Technology
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    • 제36권6호
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    • pp.844-849
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    • 2012
  • 양방향 컨버터는 신재생에너지를 이용하는 전력시스템, 무정전 전원 공급장치, 전기차 등 여러분야에서 사용되며, 양방향 절연 컨버터는 양방향 비절연 컨버터보다 높은 신뢰성을 갖지만 효율이 낮다는 단점이 있다. 본 논문에서는 개선된 효율을 가지는 절연된 양방향 Zeta-Flyback 컨버터를 제안한다. 이 컨버터는 양방향 Flyback 컨버터와 양방향 Zeta 컨버터의 중첩으로서 순방향 동작과 역방향 동작에서 전력 흐름이 변압기와 소자를 통해 수행되어 변압기 이용률이 증가하고, 출력 전압은 스위치의 일정 주파수 PWM의 듀티비에 의해 제어된다. 제안된 양방향 Zeta-Flyback 컨버터와 양방향 Flyback 컨버터를 비교하면 제안된 양방향 Zeta-Flyback 컨버터가 더 높은 효율을 갖으며 이를 시뮬레이션과 실험을 통하여 확인하였다.

Non-isolated Bidirectional Soft-switching SEPIC/ZETA Converter with Reduced Ripple Currents

  • Song, Min-Sup;Son, Young-Dong;Lee, Kwang-Hyun
    • Journal of Power Electronics
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    • 제14권4호
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    • pp.649-660
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    • 2014
  • A novel non-isolated bidirectional soft-switching SEPIC/ZETA converter with reduced ripple currents is proposed and characterized in this study. Two auxiliary switches and an inductor are added to the original bidirectional SEPIC/ZETA components to form a new direct power delivery path between input and output. The proposed converter can be operated in the forward SEPIC and reverse ZETA modes with reduced ripple currents and increased voltage gains attributed to the optimized selection of duty ratios. All switches in the proposed converter can be operated at zero-current-switching turn-on and/or turn-off through soft current commutation. Therefore, the switching and conduction losses of the proposed converter are considerably reduced compared with those of conventional bidirectional SEPIC/ZETA converters. The operation principles and characteristics of the proposed converter are analyzed in detail and verified by the simulation and experimental results.

AC-DC Zeta Converter for Power Quality Improvement in Direct Torque Controlled PMSM Drive

  • Singh Bhim;Singh B.P.;Dwivedi Sanjeet
    • Journal of Power Electronics
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    • 제6권2호
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    • pp.146-162
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    • 2006
  • This paper deals with the analysis, design and implementation of an AC-DC Zeta converter in discontinuous current mode (DCM) of operation used for power quality improvement at AC mains in direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drives. The designed Zeta converter feeds a direct torque controlled PMSM drive system. Modeling and simulation is carried out in a standard PSIM software environment. Test results are obtained on the developed prototype Zeta converter using DSP ADMC401. The results obtained demonstrate the effectiveness of the Zeta converter in improving power quality at AC mains in the PMSM drive system.

결합 인덕터를 이용한 3-레벨 Zeta 컨버터 (Three-Level Zeta Converter using a Coupled Inductor)

  • 이승재;양민권;허준;최우영
    • 전력전자학회논문지
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    • 제21권3호
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    • pp.191-199
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    • 2016
  • Conventional two-level Zeta converters have drawbacks, such as high voltage stresses and high current ripples. To address these problems, a three-level Zeta converter that uses a couple inductor is proposed in this study. The proposed converter utilizes the three-level power switching circuit to reduce the voltage stresses and inductor current ripples. Compared with the conventional converter, the proposed converter can improve power efficiency and power density. A 500 W prototype circuit is used to verify the operation and performance of the proposed converter via experimental results.

Analysis, Design, and Implementation of a Single-Phase Power-Factor Corrected AC-DC Zeta Converter with High Frequency Isolation

  • Singh, Bhim;Agrawal, Mahima;Dwivedi, Sanjeet
    • Journal of Electrical Engineering and Technology
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    • 제3권2호
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    • pp.243-253
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    • 2008
  • This paper deals with the analysis, design, and implementation of a single phase AC-DC Zeta converter with high frequency transformer isolation and power factor correction(PFC) in two modes of operation, discontinuous current mode of operation(DCM), and continuous current mode of operation(CCM). A Digital Signal Processor(DSP) based implementation is carried out for validation of the Zeta converter developed design in discontinuous mode of operation. A comparison of both modes of operation is presented for a 1kW power rating from the point of view of steady state and dynamic behavior, power quality, simplicity, control technique, device rating, and converter size. The experimental results of a developed prototype of Zeta converter are presented for validation of the developed design. It is observed that CCM is most suitable for higher power applications where it requires some complex control and sensing of the additional variables.

3상 PWM Zeta AC-AC 컨버터의 회로구성과 특성 (Circuit Topology and Characteristics of Three Phase PWM Zeta AC-AC Converter)

  • 최남섭
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.122-124
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    • 2005
  • In this paper, a three phase PWM Zeta AC-AC converter for VVCF applications is presented. The PWM Zeta AC-AC converter is modelled by using vector DQ transformation whereby the basic DC characteristics equation is analytically obtained. Finally, the PSIM simulation shows the validity of the modelling and analysis.

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새로운 양방향 ZVS PWM Sepic/Zeta DC-DC 컨버터 (New Bidirectional ZVS PWM Sepic/Zeta DC-DC Converter)

  • 김인동;팽성환;박성대;노의철;안진우
    • 전기학회논문지
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    • 제56권2호
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    • pp.301-310
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    • 2007
  • Bidirectional DC-DC converters allow transfer of power between two dc sources, in either direction. Due to their ability to reverse the direction of flow of power, Dey are being increasingly used in many applications such as battery charge/dischargers, do uninterruptible power supplies, electrical vehicle motor drives, aerospace power systems, telecom power supplies, etc. This Paper Proposes a new bidirectional Sepic/Zeta converter. It has low switching loss and low conduction loss due to auxiliary communicated circuit and synchronous rectifier operation, respectively Because of positive and buck/boost-like DC voltage transfer function(M=D/1-D), the proposed converter is very desirable for use in distributed power system. The proposed converter also has both transformer-less version and transformer one.

ZVS Center-Tapped Half-Bridge Zeta Converter with Reduced Output Filter Inductor Size

  • Lee, Jae-Bum;Park, Ki-Bum;Kim, Hyoung-Suk;Seong, Hyun-Wook;Moon, Gun-Woo;Youn, Myung-Joong
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2011년도 전력전자학술대회
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    • pp.163-164
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    • 2011
  • In this paper, a new half-bridge zeta converter employing a center-tapped rectifier is proposed. The proposed converter provides a bidirectional powering path in the rectifier. As a result, its improved rectifier voltage waveform reduces the output filter inductor size. Also, it maintains a wide ZVS range due to the characteristic of the conventional single-ended half-bridge zeta converter. The operational principles, the theoretical analysis, and the design considerations of the proposed converter are analyzed. To verify the performance of the proposed converter, experimental results from a 180W prototype are presented.

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Single-Phase Bridgeless Zeta PFC Converter with Reduced Conduction Losses

  • Khan, Shakil Ahamed;Rahim, Nasrudin Abd.;Bakar, Ab Halim Abu;Kwang, Tan Chia
    • Journal of Power Electronics
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    • 제15권2호
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    • pp.356-365
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    • 2015
  • This paper presents a new single phase front-end ac-dc bridgeless power factor correction (PFC) rectifier topology. The proposed converter achieves a high efficiency over a wide range of input and output voltages, a high power factor, low line current harmonics and both step up and step down voltage conversions. This topology is based on a non-inverting buck-boost (Zeta) converter. In this approach, the input diode bridge is removed and a maximum of one diode conducts in a complete switching period. This reduces the conduction losses and the thermal stresses on the switches when compare to existing PFC topologies. Inherent power factor correction is achieved by operating the converter in the discontinuous conduction mode (DCM) which leads to a simplified control circuit. The characteristics of the proposed design, principles of operation, steady state operation analysis, and control structure are described in this paper. An experimental prototype has been built to demonstrate the feasibility of the new converter. Simulation and experimental results are provided to verify the improved power quality at the AC mains and the lower conduction losses of the converter.

저스위칭손실 및 저도통손을 갖는 양방향 ZVS PWM Sepic/Zeta 컨버터 (Bidirectional ZVS PWM Sepic/Zeta Converter with Low Conduction Loss and Low Switching Loss)

  • 팽성환;이병철;최성훈;김인동;노의철
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.549-551
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    • 2005
  • Bidirectional DC/DC converters allows transfer of power between two dc sources, in either direction. Due to their ability to reverse the direction of flow of power, they are being increasingly used in many applications such as battery charger/dischargers, dc uninterruptible power supplies, electrical vehicle motor drives, aerospace power systems, telecom power supplies, etc. This paper proposes a new bidirectional Sepic/zeta converter. It has low swicthing loss and low conduction loss due to auxiliary communicated circuit and synchronous rectifier operation, respectively. Because of positive and buck/boost-like DC voltage transfer function(M=D/1-D), the proposed converter is very desirable for use in distributed power system . The proposed converter also has both transformerless version and transformer one.

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