A Dual-Carrier Modulation Technique for Half-Bridge Resonant Converter With Wide Soft-Switching Range | IEEE Journals & Magazine | IEEE Xplore

A Dual-Carrier Modulation Technique for Half-Bridge Resonant Converter With Wide Soft-Switching Range


Abstract:

A dual-carrier modulation technique is proposed to improve the performance of the half-bridge resonant converter in this paper. By alternately using two different sawtoot...Show More

Abstract:

A dual-carrier modulation technique is proposed to improve the performance of the half-bridge resonant converter in this paper. By alternately using two different sawtooth waveforms as a carrier, the dual-carrier modulation combines the characteristics of both variable frequency modulation and fixed-frequency modulation. According to the structure of modulator, there are two kinds of dual-carrier modulation: type A and type B. Type A dual-carrier modulation is suitable for resonant converters operating in inductive region to achieve a wide zero voltage switching (ZVS) range, while type B dual-carrier modulation is preferred for resonant converters operating in capacitive region to obtain a wide zero current switching range. By utilizing both switching frequency modulation and duty ratio modulation, the proposed dual-carrier modulation not only extends soft-switching range of the resonant converter, but also reduces switching frequency variation range. In order to verify the benefits of the proposed modulation, a 500-W dual-carrier modulated LCC resonant converter operating in inductive region is designed and built. Simulation and experimental results show the prototype achieves ZVS soft-switching operation for 200-400 V input voltage and 100-500 W output power, with only about 10 kHz switching frequency variation.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 66, Issue: 1, January 2019)
Page(s): 223 - 232
Date of Publication: 16 April 2018

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