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S.Sato,S.Moisseev,M.Nakaoka 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
In this paper, a full bridge edge-resonant zero voltage mode based soft-switch 109 PWM DC-DC power converter with a high frequency center tapped transformer link stage IS presented from a practical po lot of View The power MOSFETs operating as synchronous rectifier devices are Implemented 10 the rectifier center tapped stage to reduce conduction power losses and also to extend the transformer primary side power MOSFETs ZVS commutation area from the rated to zero-load without a requirement of a magnet1zing current The steady-state operation of this phase-shift PWM controlled power converter IS described In comparison with a conventional ZVS phase-shift PWM DC-DC converter using the diodes rectifier Moreover, the experimental results of the switch 109 power losses analysis are evaluated and discussed m this paper The practical effectiveness of the ZVS phase-shift PWM DC-DC power converter treated here is actually proved by using 25kW~32kHz breadboard circuit An actual efficiency of this converter is estimated in experiment and IS achieved as 97% at maximum
Feasibility Study of Taped Inductor Filter Assisted Soft-Switching PWM DC-Power Converter
S Moisseev,S Ssto,S.Hamada,M Nakaoka 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper presents a novel high frequency transformer linked full-bridge type soft-switching phase-shift PWM control scheme DC-DC power converter, which can be used as power conditioner for small-scale fuel cell power generation system Using full-bridge soft-switching DC-DC converter topology makes possible to use low voltage high performance MOSFETs to achieve high efficiency of the power conditioner A tapped inductor filter IS Implemented m the proposed soft-switching converter topology to achieve soft-switching PWM constant high frequency operation for a wide load variation range, to minimize circulating and Idling currents without using additional resonant Circuit and auxiliary power switching devices The practical effectiveness of the proposed soft-switching DC-DC converter is verified In laboratory level experiment with 1kW 100kHz breadboard setup using power MOSFETs. Actual efficiency of 94-96% is obtained for the wide load range
Y.Deguchi,S. Moisseev,M.Nakaoka,I.Hirota,H.Yamashita,H.Omori,H.Terai 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
This paper presents a simple and cost effective circuit topology of single-ended type high frequency quasi-resonant PWM inverter using IGBTs, which can operate under wide soft switching operation range based on ZCS for main power switch as compared with a conventional active voltage-clamped ZVS-PWM high frequency quasi-resonant inverter developed previously In principle, this new circuit topology can efficiently operate under a constant frequency PWM control-based power regulation scheme In particular, it is noted that the zero current soft switching (ZCS) commutation can achieve for the main active power switch On the other hand, the zero voltage soft switching (ZVS) commutation can also achieve for the auxiliary active power switch The operating principle of this high-frequency Inverter treated here and its power regulation characteristics are illustrated on the basis of the simulation and feasible experimental results.
A Novel Quasi-Resonant ZCS-PFM DC-DC Switching Regulator with Loosely-Coupled Flyback Inductors
E.H.Chu,S.Chandhaket,S.Moisseev,E.Hiraki,M.Nakaoka,H.Kifune 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
This paper presents a novel topological prototype of voltage source series quasi-resonant zero current soft-switching pulse frequency modulated dc-dc power converter circuit using IGBTs which incorporates a high-frequency flyback transformer link. Its steady-state operating principle is described on the basis of simulation analysis, along with the open loop controlled power regulation characteristics of the multi-functional coupled inductors linked dc-dc power converter operating under a principle of zero current soft switching commutation.<br/>