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| 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 |
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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.
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Received: 24 May 2013
Published: 22 May 2014
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| Fund:Project Supported by National Natural Science Foundation of China (61104088) |
| About author:: Zhongqi Li, male, born in 1985. His areas of interests are wireless power transmission based on magnetic resonance coupling and high frequency DC/AC converters.;Shoudao Hunag, male, born in 1962. His areas of interests are motor design, motor control, and wireless power transmission. |
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2013, Vol. 28 
