The partial series resonant converter: a new zero voltage switching converter with good light load efficiency

Author

Theron, P.C. ; Ferreira, Jan Abraham

Author_Institution

Energy Lab., Rand Afrikaans Univ., Johannesburg, South Africa

fYear

1993

fDate

2-8 Oct 1993

Firstpage

835

Abstract

A novel high-frequency DC-to-DC power converter, suitable for application in the kW range, is presented. The topology is series resonant for a part of each switching cycle and transfers a discrete energy pulse to the load every half cycle, rendering a variable-frequency controller for controlling the output power. The transformer is a pulse transformer which operates only during resonance, i.e., for part of each switching cycle, irrespective of the switching frequency. The converter features zero-voltage turn-on and snubbed turn-off at reduced current for the switching devices, and zero current commutation of the rectifier devices, making it suitable for IGBT (insulated-gate bipolar transistor) switches operating at a switching frequency higher than 20 kHz. Therefore, the efficiency of the converter is very high under full load and low load conditions, while the dynamic output voltage range is two times larger than that of the conventional series resonant converter

Keywords

circuit resonance; commutation; insulated gate bipolar transistors; power convertors; power transformers; power transistors; pulse transformers; rectifying circuits; switching circuits; DC-to-DC power converter; HF; IGBT; ZVS; discrete energy pulse; dynamic output voltage range; efficiency; load; partial series resonant; power convertors; power transistors; pulse transformer; rectifier; snubbed turn-off; switching devices; topology; turn-on; variable-frequency controller; zero current commutation; zero voltage switching; DC-DC power converters; Insulated gate bipolar transistors; Power generation; Power transformer insulation; Pulse transformers; Resonance; Switching converters; Switching frequency; Topology; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.298996

Filename

298996