Title :
Multi-resonant soft-switching PWM DC-DC high-power converter with quasi resonant-poles and resonant AC tank using interal parasitic circuit components of high-voltage transformers and cable
Author :
Kim, Y.J. ; Michihira, M. ; Nakaoka, M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Kobe Univ., Japan
Abstract :
This paper deals with a fixed frequency phased-shifted PWM multi-resonant (MR) inverter type DC-DC high-power converter with a two HFHV transformers-coupled stage, which operates under ZVS transition principles in spite of a wide PWM-based voltage regulation processing and largely-changed load conditions. This MR converter topology is composed of a series capacitor-connected parallel resonant tank which makes the most of parasitic circuit components of the two HV transformers, and two additional quasi-resonant pole circuits incorporated into the bridge. The soft switching operation and practical efficacy of this new converter circuit using the latest IGBTs are actually ascertained through a 50 kW-120 kV trial-produced converter system operating using 20 kHz/30 kHz HV transformers
Keywords :
circuit resonance; insulated gate bipolar transistors; poles and zeros; power convertors; power transformers; power transistors; pulse width modulation; switching circuits; 120 kV; 20 kHz; 30 kHz; 50 kW; DC/DC power convertors; HV transformers; IGBTs; PWM; ZVS; load; multiresonant; parasitic circuit components; quasi-resonant pole circuits; resonant AC tank; soft switching;
Conference_Titel :
Power Electronics and Applications, 1993., Fifth European Conference on
Conference_Location :
Brighton
