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Space Vector Modulated Three-Phase Soft-Switching Active Rectifier and Its Performance Evaluations
Yuma Fujii,Tarek Ahmed,Kosuke Imamura,Eiji Hiraki,Mutsuo Nakaoka 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper presents an Instantaneous space vector modulated voltage source type three-phase soft-switching PFC rectifier using a single auxiliary resonant DC Link snubber for alternative energy utilizations<br/> In the first place, the operating principle of an active auxiliary resonant DC link snubber Circuit IS described including Its unique features In the next place, the simulation analysis of three-phase soft-switching PWM rectifier IS Implemented, and the operating performances of the three-phase voltage-fed PWM rectifier treated here, which can operate under the conditions of sinewave line current shaping and utility power factor are evaluated and discussed on the basis of this simulation results.
Kazuhiro Shiraishi,Koki Ogura,Mantaro Nakamura,Yuma Fujii,Eiji Hiraki,Hyun Woo Lee,Mutsuo Nakaoka 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper presents an advanced circuit topology and optimum gate pulse patterns for the voltage source bridge type soft-switching(S-SW) sinewave PWM inverter, which incorporates a novel active auxiliary bridge commutation leg, associated quasi-resonant snubbers. In this voltage source type sinewave PWM inverter, all the main power switches and the auxiliary power switches can achieve the zero voltage soft-switching (ZVS) or the zero current soft-switching (ZCS). The complete S-SW commutation is possible only by determining the gate pulse pattern timing of the main switches and the auxiliary switches, and circuit parameters. The special resonant current and the current and voltage sensor control circuit to achieve S-SW commutation are not necessary for<br/> these resonant snubbers. In addition, the optimum gate pulse pattern to minimize the power losses of the resonant snubber treated here.