Novel full bridge zero-voltage-transition PWM DC/DC converter for high power applications

Author

Cho, Jung G. ; Sabaté, Juan A. ; Lee, Fred C.

Author_Institution

Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

1994

fDate

13-17 Feb 1994

Firstpage

143

Abstract

A novel full-bridge (FB) zero-voltage-transition (ZVT) PWM DC/DC converter for high power applications is proposed. An auxiliary network which consists of two small switches and one small inductor provides zero-voltage-switching (ZVS) for entire line and load ranges without increasing device voltage and current stresses. Since the ZVS range is independent of the switch capacitance, IGBTs can be used instead of MOSFETs by adding external capacitors to the switches without increasing switching losses, which allows the proposed converter to handle higher power. Operation, analysis, and features are described and verified experimentally. A 1.8 kW ZVT PWM converter prototype is compared with a ZVS PWM converter prototype of the same power rating

Keywords

bridge circuits; power convertors; pulse width modulation; switching circuits; 1.8 kW; 83 kHz; IGBT; PWM DC/DC converter; auxiliary network; equivalent circuits; external capacitors; full bridge zero-voltage-transition; high power applications; inductor; switches; zero-voltage-switching; Bridge circuits; Capacitance; DC-DC power converters; Inductors; Prototypes; Pulse width modulation; Pulse width modulation converters; Stress; Switches; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1994. APEC '94. Conference Proceedings 1994., Ninth Annual

Conference_Location

Orlando, FL

Print_ISBN

0-7803-1456-5

Type

conf

DOI

10.1109/APEC.1994.316407

Filename

316407