Research on Frequency Splitting Characteristic of MCR-WPT Systems Based on Vibration Theory
Sun Yue1, 2, Liao Zhijuan2, Ye Zhaohong2, Tang Chunsen2, Wang Peiyue2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400030 China; 2. College of Automation Chongqing University Chongqing 400030 China
Abstract：In order to further reveal the physical interpretation of frequency splitting for magnetic coupling resonant wireless power transfer (MCR-WPT) systems, and to provide a systematic operating principle for MCR-WPT systems operating at the maximum power transfer state, a novel modeling and analyzing method is proposed in this paper. According to the Kirchhoff’s voltage law (KVL), the time-domain model of MCR-WPT system is derived. Then the analytical expression of transfer power is obtained by using matrix calculation. Further, based on vibration theory, the frequency splitting phenomenon of transfer power has been deeply analyzed and several key system parameters, including system natural frequency, circuit natural frequency and resonant frequency, have been elucidated and derived. Meanwhile, the relationship between system natural frequency and circuit natural frequency has also been deeply analyzed, based on which the physical interpretation of frequency splitting and resonance has been revealed. Finally, a prototype has been built and tested to validate the theoretical results.
孙跃, 廖志娟, 叶兆虹, 唐春森, 王佩月. 基于振动理论的MCR-WPT系统频率分裂特性研究[J]. 电工技术学报, 2018, 33(13): 3140-3148.
Sun Yue, Liao Zhijuan, Ye Zhaohong, Tang Chunsen, Wang Peiyue. Research on Frequency Splitting Characteristic of MCR-WPT Systems Based on Vibration Theory. Transactions of China Electrotechnical Society, 2018, 33(13): 3140-3148.
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2018, Vol. 33 
