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Transmission efficiency analysis for magnetic coupled resonancewireless power transfer system in over-coupled region(PDF)


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Transmission efficiency analysis for magnetic coupled resonancewireless power transfer system in over-coupled region
Liu Yuanyuan12Feng Hongwei3
1.School of IoT Engineering,Jiangnan University,Wuxi 214122,China; 2.Wuxi Vocational College of Science and Technology,Wuxi 214028,China; 3.Wuxi Institute of Technology,Wuxi 214121,China
magnetic coupling resonance wireless power transfer over-coupled region transmission efficiency identical resonators non-identical resonators frequency splitting
The transmission efficiency of a magnetic coupled resonance wireless power transfer(MCR-WPT)system for identical and non-identical resonators in over-coupled region is discussed. A circuit model of the MCR-WPT system is established by using the equivalent circuit theory. The frequency splitting phenomenon is analyzed by the functional relationship between equivalent parameter,frequency and coupling coefficient,and a closed equation of frequency splitting and the transmission efficiency of the equivalent resonant circuit in over-coupled region are derived. The consistency between the analysis results and the experimental results is verified by designing a loop coil and related experiments. Mathematical proof shows that the transmission efficiency can be constant even if frequency splitting occurs in a resonant circuit with identical resonators. The research results show that the resonant circuit with identical resonators can achieve high stability performance in the over-coupling region of MCR-WPT system.


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Last Update: 2019-06-30