Analysis and Design of Phase-Shift Pulse-Frequency-Modulated Full-Bridge LCC Resonant Converter

• Published in: IEEE transactions on industrial electronics (1982) Vol. 67; no. 2; pp. 1092 - 1102
• Main Authors: Chen, Yiming, Xu, Jianping, Gao, Yanan, Lin, Leiming, Cao, Jing, Ma, Hongbo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: <named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> LCC</tex-math> </inline-formula> </named-content> resonant converter; Control systems; Converters; Design parameters; Electric potential; Electronics; Frequency variation; Generators; Modulation; Phase shift; phase-shift pulse-frequency modulation (PS-PFM); Prototypes; Pulse frequency modulation; Reactive power; Resonant converters; Switching; Switching frequency; switching frequency variation range; Voltage; Voltage control; Zero voltage switching; zero voltage switching (ZVS)
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2019.2898586

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%.