基于调频控制的三线圈结构无线电能传输系统效率优化研究

doi:10.19595/j.cnki.1000-6753.tces.180884

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Abstract The three-coil wireless power transfer (WPT) system possesses a greater energy transmission distance and higher system transmission efficiency, compared to the two-coil WPT system. Although the three-coil WPT system has an excellent performance on long distance power transmission, theoretical analyses show that its near-field energy transfer efficiency is very low. In this paper, an efficiency optimization of three-coil WPT system based on frequency-varied control is proposed, which uses the optimal operating frequency corresponding to the distance at different transmission distances to improve its near-field energy transfer efficiency. Firstly, we deduced the three-coil WPT system efficiency equation to prove the efficiency could be changed by varying frequency. Secondly, we verified that there is an optimal operating frequency, which varies with transmission distances. Lastly, the feasibility of the efficiency optimization of three-coil structure WPT system based on frequency-varied control was verified by experiments. The problem of low efficiency in near-field is solved, and the maximum improvement of efficiency is 15%.

Key words： Wireless power transfer three-coil structure efficiency optimization frequency- varied control

Received: 22 May 2018 Published: 15 February 2019

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TM724

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	Articles by authors
	Chen Feibin
	Mai Ruikun
	Li Yong
	He Zhengyou

Cite this article:

Chen Feibin,Mai Ruikun,Li Yong等. Efficiency Optimization of Three-Coil Structure Wireless Power Transfer System Based on Frequency-Varied Control[J]. Transactions of China Electrotechnical Society, 2018, 33(zk2): 313-320.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180884 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/Izk2/313

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