基于双边LCL变补偿参数谐振式无线充电系统的研究与分析

doi:10.19595/j.cnki.1000-6753.tces.211330

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Abstract In wireless charging, the switching process from constant current charging mode to constant voltage charging mode is complicated, and the control circuit design is difficult. Therefore, this paper designs a magnetic coupling resonant wireless charging system with variable compensation parameters based on the bilateral LCL topology. The system only needs to switch the additional inductance of the secondary side to complete the smooth conversion from constant current charging to constant voltage charging, thereby eliminating the communication between the original secondary side, reducing the complexity of control circuit design and improving the overall efficiency and stability of the wireless charging system. Firstly, the paper theoretically analyzes of the bilateral LCL variable compensation topology, and derives the conditions for the constant current and constant voltage of the primary side of the system. Then, through the transient analysis of the system constant current to constant voltage switching process, the smooth transition of the switching is realized. Finally, the designed wireless charging system is simulated and experimentally verified. The results show that the system can achieve smooth switching from constant current to constant voltage, and the charging current deviation and charging voltage deviation are 1.65% and 1.8% respectively under the charging conditions of constant current 3A and constant voltage 60V, which meet the battery charging. requirements. In the constant voltage charging mode, the output current waveform of the secondary side resonant network of the system is significantly improved, and the waveform distortion rate is reduced from 15.43% to 1.24%.

Key words： Wireless charging bilateral LCL constant current constant voltage

Received: 23 August 2021

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TM46

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	Articles by authors
	Wang Dangshu
	Dong Zhen
	Gu Dongming
	Yi Jiaan
	Luan Zhezhe
	Wang Xinxia

Cite this article:

Wang Dangshu,Dong Zhen,Gu Dongming等. Research and Analysis of Resonant Wireless Charging System Based on Bilateral LCL Variable Compensation Parameters[J]. Transactions of China Electrotechnical Society, 2022, 37(16): 4019-4028.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211330 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I16/4019

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