Journal
IECON 2020: THE 46TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
Volume -, Issue -, Pages 1255-1260Publisher
IEEE
DOI: 10.1109/iecon43393.2020.9254873
Keywords
resonant switched-capacitor converter; phase-shift; variable frequency; voltage regulation; ZVS
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Funding
- National Natural Science Foundation of China [52007008]
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In this paper, a modified triple-mode resonant switched-capacitor converter (RSC) with phase-shift and variable frequency hybrid modulation scheme is analyzed and designed. All the transistors can be operated with zero voltage switching (ZVS) turn-on, reducing switching loss significantly. Based on the comprehensive operation principle analysis, state-plane trajectory, a modulation scheme is proposed to provide a guideline for converter operation in the low circulating current region and to improve the light-load operation performance. It is shown that both the switching frequency and phase-shift range can be modulated to regulate the output voltage continuously and widely. A 48 V to 100V-160V open loop prototype with power level 70-170W, frequency range 90-140 kHz and peak efficiency 98.4% was built to verify the operation of the converter.
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