Title :
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
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;
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
DOI :
10.1109/APEC.1994.316407
