Transfer Efficiency Analysis of Magnetic Resonance Wireless Power Transfer with Multiple Intermediate Resonant Coils
Li Zhongqi1, Huang Shoudao1, Yang Minsheng2, Yuan Xiaofang1
1. College of electrical and information engineering Hunan University Changsha 410082 China 2. Electric and engineering department Hunan university of Arts and Science Changde 415000 China
Abstract：The transfer efficiency and the transmission distance in the magnetic resonance coupling wireless power transfer system is contradictory, generally speaking, the farther the distance is, the lower the efficiency is. In order to simultaneously achieve the high transfer efficiency and the far transmission distance requirements, the intermediate coils system is proposed. The expression for the efficiency of the system is obtained by applying coupled-mode theory(CMT) when an intermediate coil is added. Maximum transfer efficiency is obtained when coupling coefficients are equal between adjacent coils and cross-coupling coefficient is equal to zero via analysis of the expression for the efficiency of the system. The simulation and experimental verify the correctness of the theory.
李中启, 黄守道, 杨民生, 袁小芳. 多中继线圈的无线电能传输系统效率分析[J]. 电工技术学报, 2013, 28(2增): 35-42.
Li Zhongqi, Huang Shoudao, Yang Minsheng, Yuan Xiaofang. Transfer Efficiency Analysis of Magnetic Resonance Wireless Power Transfer with Multiple Intermediate Resonant Coils. Transactions of China Electrotechnical Society, 2013, 28(2增): 35-42.
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2013, Vol. 28 
