交错并联LLC谐振变换器的磁集成均流特性

doi:10.19595/j.cnki.1000-6753.tces.L80467

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Abstract In order to expand the capacity, LLC resonant converters mostly use a two-phase or multi-phase parallel structure. However, due to the inevitable deviation of the resonant element parameters of each phase in the interleaved LLC resonant converter, mainly including resonant inductance and resonant capacitance, the voltage gains between the LLC resonant converters are not equal, resulting in the unbalanced current of each phase. In order to solve this problem, a magnetic integrated current sharing scheme for 180° interleaved parallel LLC resonant converter is proposed. By magnetically integrating each resonant inductor, the primary current and load current of each LLC circuit can be balanced automatically without adding additional circuit and changing control strategy. It not only maintains the inherent soft switching characteristic of LLC resonant converter, but also improves the efficiency and reduces the number of resonant inductors from two to one. An 1kW experimental prototype of two-phase interleaving parallel magnetic integrated LLC resonant converter was built to verify the effectiveness of the current sharing scheme.

Key words： Interleaved LLC resonant converter magnetic integrated coupling inductors current sharing characteristics

Received: 01 July 2018 Published: 28 June 2019

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TM46

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	Articles by authors
	Yang Yugang
	Wu Han
	Guan Tingting

Cite this article:

Yang Yugang,Wu Han,Guan Tingting. Magnetic Integrated Current Sharing Characteristics of Interleaved LLC Resonant Converter[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2529-2538.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80467 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I12/2529

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