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저스위칭손실 및 저도통손을 갖는 양방향 ZVS PWM Sepic/Zeta 컨버터
팽성환(S. H. Paeng),이병철(B. C. Lee),최성훈(S. H. Choi),김인동(I. D. Kim),노의철(E. C. Nho) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
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.
최성훈(S. H. Choi),이병철(B. C. Lee),팽성환(S. H. Paeng),김인동(I. D. Kim),노의철(E. C. Nho) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper proposes a unity power factor ZVT PWM single-phase rectifier. The ZVT soft switching are achieved by using a simple ZVT circuit, and the reduced conduction losses are achieved by employing a single-stage converter, instead of a typical double-stage converter composed of front end diode rectifier and cascaded boost rectifier. Furthermore, thanks to good features such as simple PWM control at constant frequency, low switch stress and low VAR rating of commutation circuits, it is suitable for high power applications. The principle of operation is explained in detail, and simulation results of the new converter are also included.
이병철(B.C. Lee),최성훈(S.H. Choi),팽성환(S.H. Paeng),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper deals with power quality disturbance generator with phase jump function. The proposed generator can be applied to the performance test of custom power devices. Voltage sag, swell, outage, unbalance and phase jump after outage are provided by the generator. The phase jump operating principle of the generator is described and analysed. The control scheme of the disturbance generator is simple and hardware setup is cost effective compared with the conventional scheme. The usefulness of the generator is verified through simulation and experimental results.
전력품질 개선장치를 위한 간단한 구조의 전압변동 발생기
이병철(B.C. Lee),최성훈(S.H. Choi),팽성환(S.H. Paeng),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper deals with a simple structured voltage disturbance generator for power quality improving devices. The proposed generator can be applied to the performance test of custom power devices. Voltage sag, swell, outage, unbalance and phase jump after outage are provided by the generator. The improving phase jump operating principle of the generator is described and analysed. The usefulness of the generator is verified through simulation.