LLC resonant converters have drawn growing attention from industries. Time-domain analysis has the advantage of high accuracy, promoting the utilization of resonant tanks. This article proposes a parameter optimization methodology for phase-shift LLC converters based on a fast-convergent time-domain algorithm. The algorithm can be extended to different operating modes, rather than confined to a specific mode. It minimizes the number of iterative variables in the time analysis and reasonably estimates its initial points based on the fundamental harmonic analysis. Thus, accurate results can be obtained much faster than the existing time-domain algorithms. The property of fast convergence makes it easy to quantitatively investigate the power loss characteristics, based on which the parameter optimization methodology is proposed. The methodology guarantees that the converter achieves zero voltage switching for the primary switches and zero current switching for the secondary diodes in the entire operating region. The energy conversion efficiency is improved by reducing the conduction loss and switching loss. The effectiveness of the proposed methodology is verified by a 2-kW experimental prototype, whose peak efficiency is 96.3%.
机构:
South China University of Technology, Guangzhou
Guangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou
Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, ChangshaSouth China University of Technology, Guangzhou
Liang L.
Liang L.
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South China University of Technology, Guangzhou
Guangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou
Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, ChangshaSouth China University of Technology, Guangzhou
Liang L.
Su C.
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South China University of Technology, GuangzhouSouth China University of Technology, Guangzhou
Su C.
Feng Z.
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Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, ChangshaSouth China University of Technology, Guangzhou
Feng Z.
Chen Z.
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Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, ChangshaSouth China University of Technology, Guangzhou
机构:
Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
Guo, Ning
Liu, Jinjun
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Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
Liu, Jinjun
Du, Sixing
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Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
Du, Sixing
Li, Cong
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Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
Li, Cong
Chen, Hui
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Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
Chen, Hui
Deng, Zhifeng
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Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China