Impedance Analysis and Design of Matching Circuit in Wireless Power Transfer System via Coupled Magnetic Resonances
Li Yang1, Zhang Yaxi1, Yan Zhuo2, Yang Qingxin1, Xue Ming1, Zhang Xian1
1. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China; 2. Electronic Information Engineering College Hebei University Baoding 071002 China
Abstract：Impedance mismatch in wireless power transfer system may lead to the problems of low efficiency or burnout power amplifier. Taken the coupling factor, resistance of power and coil into account, this paper analyzed the power amplifier load impedance of four-coil model wireless power transfer system via coupled magnetic resonances, based on mutual inductance coupling theory. Since the impedance is difficult to achieve the ideal effect by changing the system mutual inductance, the impedance matching circuit was proposed and designed. Matching circuit of π type was designed, the calculating method and its results were given. In the end, the experiment device of wireless power transfer via coupled magnetic resonances was developed. Experimental results were consistent with the theoretical analysis. Thus it provides a useful reference for further studies on adaptive impedance matching and the improvement of the wireless power transfer power and efficiency.
李阳, 张雅希, 闫卓, 杨庆新, 薛明, 张献. 磁耦合谐振式无线电能传输系统阻抗分析与匹配电路设计方法[J]. 电工技术学报, 2016, 31(22): 12-18.
Li Yang, Zhang Yaxi, Yan Zhuo, Yang Qingxin, Xue Ming, Zhang Xian. Impedance Analysis and Design of Matching Circuit in Wireless Power Transfer System via Coupled Magnetic Resonances. Transactions of China Electrotechnical Society, 2016, 31(22): 12-18.
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2016, Vol. 31 
