中国电气工程学报（英文） ›› 2019, Vol. 5 ›› Issue (4): 51-60.doi: 10.23919/CJEE.2019.000027

• • 上一篇    

  

  • 出版日期:2019-12-25 发布日期:2020-03-12

Design and Analysis of a Wireless Power Transmission System with Magnetic Coupling Resonance in the Weak-coupling Region*

Dawei Song1,*, Fengdong Shi1, Shuailong Dai2, Lai Liu1   

  1. 1. School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China;
    2. College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China
  • Online:2019-12-25 Published:2020-03-12
  • Contact: * Email: songdawei399@163.com
  • About author:Dawei Song was born in Xiaogang, China, in 1995. He received his B.S. degree in Electrical Engineering and Automation from the School of Electrical and Automation Engineering, Wuchang University of Technology, Wuhan, China, in 2017. He is presently working towards his M.S. degree in Tianjin Polytechnic University. His current research interests include bidirectional DC/DC converters, equilibrium circuit systems, energy internet, and distributed energy storage.
    Fengdong Shi was born in 1977, master, associate professor. He received his B.S. and M.S. degrees in electrical engineering respectively from East China Jiaotong University, Nanchang, China, and Tianjin Polytechnic University (TJPU), Tianjin, China. During the summer of 2015, he worked on novel common-ground transformerless inverters for grid-connected PV systems. His research interests include DC-DC and DC-AC power converters, EMI suppression in power converters, and wide bandgap (GaN/SiC) based high-frequency power converters.
    Shuailong Dai was born in Xiangyang, China, in 1996. He received his B.S. degree in Electrical Engineering from the School of Electrical Engineering and New Energy, China Three Gorges University, Yichang, China, in 2018, where he is presently working towards his M.S. degree in the School of Electrical Engineering and New Energy. His current research interests include bidirectional DC/DC converters, equilibrium circuit systems, energy internet and distributed energy storage.
    Lai Liu was born in Jinan, China, in 1991. He received his M.S. degree in Electrical Engineering from the School of Electrical Engineering, Tianjin Polytechnic University, Tianjin, China. His current research interests include bidirectional DC/DC converters, equilibrium circuit systems, distributed energy storage.
  • Supported by:
    * Supported by National Natural Science Foundation of China (51307120, 51477117).

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Abstract: The magnetically coupled resonant wireless power transfer (MCR-WPT) system for implantable medical devices has gradually become one of the research hotspots. The transmission characteristics of the system in weak-coupling regions are of research significance. The mathematical model of the system's transmission characteristics is established by equivalent circuit theory. Several key factors that affect the transmission characteristics of the system are obtained, to include the self-inductance of the coil, the mutual inductance between the coils, and the load resistance. A magnetically coupled resonant wireless power transfer system is designed. A method of coil design is proposed. The transmission efficiency of the system in the weak-coupling region is improved by optimizing the design of the coil. Simulation and experimental results exhibited good consistency. The results show that the transmission performance of the system in the weak-coupling area is improved. This work provides guidance and practical significance for the research of the MCR-WPT system with implantable medical equipment.

Key words: Wireless power transfer, frequency splitting, weak-coupling region, coil design