Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design of a High Power Three-Phase ZVS Push-Pull Converter
Authors Jun-Sung Park ; 李Sang-Won Lee ; Se-Wan Choi
DOI 10.6113/TKPE/2011.16.3.209
Page pp.209-218
ISSN 1229-2214
Keywords Three-phase DC-DC converter; Three-phase transformer; Active clamp; Fuel cells; Push-pull; Current-fed
Abstract In low voltage high current applications such as fuel cells the current-fed DC-DC converter which has small ripple current and turn ratio is more efficient. In the applications larger than 5kW the conventional single-phase current-fed converter based on full-bridge, half-bridge or push-pull topologies has high current burden of devices such as switches, and the selection and optimized design of the devices are not easy. In this paper a three-phase active-clamped current-fed push-pull DC-DC converter suitable for high power high step-up applications is proposed. The proposed converter has reduced current burden and is suitable for wide input voltage applications due to the use of whole duty cycle range. Design methods of main components including three-phase high frequency transformers are provided, and the validity and performance of the proposed converter are proved from a 5kW prototype.