Title :
A new generic family of saturable reactor-assisted soft-switching PWM DC-DC converters for high-power density distributed power systems
Author :
Nakaoka, M. ; Michihira, M. ; Hamada, S. ; Murakami, Y.
Author_Institution :
Dept. of Electr. & Electron. Eng., Kobe Univ., Japan
Abstract :
A generic family of high power density DC-DC power converter topologies with high-frequency AC link and without transformer isolation link is described. A saturable reactor assisted (SRA) soft switching mode constant frequency pulse width modulation (PWM) technique efficiently operates at a zero voltage switching transition scheme. This kind of quasi-trapezoidal wave mode PWM DC-DC power converter incorporates a small saturable reactor or a few saturable reactors in order to achieve efficient soft switching commutated operation. The use of the converter family results in much higher switching operation with a high efficiency and a quick control response. A simple forward/flyback hybrid type SRA asymmetrical PWM soft switching DC-DC power converter with high frequency link, which is included in one of the SRA soft switched PWM converter topologies, is demonstrated and theoretically analyzed in steady-state operation. Key experimental results are shown and discussed using a 150 W, 200 kHz MOSFET power converter breadboard implementation
Keywords :
insulated gate field effect transistors; power convertors; power systems; power transistors; pulse width modulation; switching circuits; 150 W; 200 kHz; AC link; DC-DC power converter; HF; MOSFET; PWM; commutation; control response; efficiency; power transistors; saturable reactor; soft switching; steady-state operation; zero voltage switching; DC-DC power converters; Frequency modulation; Inductors; Pulse transformers; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switching converters; Topology; Zero voltage switching;
Conference_Titel :
Telecommunications Energy Conference, 1992. INTELEC '92., 14th International
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0779-8
DOI :
10.1109/INTLEC.1992.268426
