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Hybrid Resonant and PWM Converter With High Efficiency and Full Soft-Switching Range

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4 Author(s)
Wensong Yu ; Bradley Dept. of Electr. & Comput. Eng., State Univ., Blacksburg, VA, USA ; Jih-Sheng Lai ; Wei-Han Lai ; Hongmei Wan

A novel soft-switching converter combining resonant half-bridge and phase-shifted pulsewidth modulation (PWM) full-bridge configuration is proposed to ensure the switches in the leading-leg operating at zero-voltage switching from true zero-load to full-load, and the switches in the lagging leg working at zero-current switching with minimum duty cycle loss and circulating conduction loss by significantly reducing leakage or series inductance. Experimental results of a 3.4-kW hardware prototype show that the circuit achieves true full-range soft switching with 98% peak efficiency. The hybrid resonant and PWM converter is attractive for electrical vehicle battery charger application.

Published in:

Power Electronics, IEEE Transactions on  (Volume:27 ,  Issue: 12 )