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

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...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2016-06, Vol.31 (6), p.4031-4047
Main Authors: Safaee, Alireza, Jain, Praveen, Bakhshai, Alireza
Format: Article
Language:English
Subjects:
Bridge circuits
Circuits
Conduction losses
Converters
DC–DC converter
Electric converters
Electric currents
Electrical equipment
Equivalence
full-bridge converter
Inductance
Inductors
Legs
Modulation
passive auxiliary circuit
Power transformer insulation
resonant auxiliary circuit
RLC circuits
Switches
Switching
Zero voltage switching
zero-voltage switching (ZVS)
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Summary: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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2015.2473822