A ZVS Pulsewidth Modulation Full-Bridge Converter With a Low-RMS-Current Resonant Auxiliary Circuit

作者：Safaee Alireza^*; Jain Praveen^*; Bakhshai Alireza^*

来源：IEEE Transactions on Power Electronics, 2016, 31(6): 4031-4047.

DOI：10.1109/TPEL.2015.2473822

• DC-DC converter
• full-bridge converter
• passive auxiliary circuit
• resonant auxiliary circuit
• zero-voltage switching (ZVS)

This paper presents the description and analysis of a phase-shift-modulated full-bridge converter with a novel robust passive low-rms-current resonant auxiliary circuit for zero-voltage switching (ZVS) operation of both the leading and lagging switch legs. Detailed time-domain analysis describes the steady-state behavior of the auxiliary circuit in different operating conditions. An in-depth comparative study between a fully specified baseline converter and the equivalent converter using the proposed resonant auxiliary circuit is presented. For a similar peak auxiliary current to ensure ZVS operation, a minimum of 20% reduction in rms current is obtained, which decreases the conduction losses. Key characteristics and design considerations are also fully discussed. Experimental results from a 750-W prototype confirm the predicted enhancements using the proposed resonant auxiliary circuit.

• 出版日期2016-6