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

fYear

1992

Firstpage

306

Lastpage

315

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1992. INTELEC '92., 14th International

Conference_Location

Washington, DC

Print_ISBN

0-7803-0779-8

Type

conf

DOI

10.1109/INTLEC.1992.268426

Filename

268426