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| Analysis and Experimental Validation on Maximum Power and Efficiency in Wireless Power Transfer System via Coupled Magnetic Resonances |
| Li Yang1, Zhang Yaxi1, Yang Qingxin1, Yan Zhuo2, Zhang Xian1, Xue Ming1, Yang Xiaobo1 |
1. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China;
2. China Electrotechnical Society Beijing 100823 China |
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Abstract In order to confirm whether the frequency offset will influence the maximum power or efficiency of load in wireless power transfer system via coupled magnetic resonances, resonant frequency of the coil, coupling factor, resistance of power and coil were considered comprehensively to model and analyze the power transfer system by mutual inductance coupling theory. the calculation method to transfer power and its efficiency was proposed and then the result of inconsistency on maximum power and efficiency in case of overcoupling with the frequency offset was given. In the end, experiment device was designed and experimental results were well consistent with the theoretical analysis, which shows the right of the proposed method and its result. Thus provides an useful reference for the further research on frequency tracking and its optimization control in wireless power transfer system.
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Received: 04 May 2014
Published: 03 March 2016
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2016, Vol. 31 
