Analysis and Design of Phase-Shift Pulse-Frequency Modulated Full Bridge LCC Resonant Converter
IEEE Transactions on Industrial Electronics(2020)
摘要
A phase-shift pulse-frequency modulation (PS-PFM) for a full-bridge
LCC
resonant converter is proposed in this paper to reduce both switching frequency variation range and reactive power of a traditional PFM
LCC
resonant converter. Like the PFM
LCC
resonant converter, a PS-PFM
LCC
resonant converter has a wider zero voltage switching operation range than a phase-shift modulated
LCC
resonant converter. By integrating a voltage-controlled carrier generator, the proposed PS-PFM modulator can adjust phase-shift angle and switching frequency simultaneously, resulting in one more degree of control freedom to optimize the steady-state performance of an
LCC
resonant converter. A detailed analysis of the proposed PS-PFM
LCC
resonant converter is performed and a step-by-step parameter design procedure is given. A 500-W/48-V prototype with 100–200 V input voltage is built to verify the theoretical analysis. The maximum efficiency of the prototype reaches 95.3%.
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关键词
Resonant converters,Switching frequency,Modulation,Generators,Voltage control,Zero voltage switching,Control systems
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