Optimal Position of the Intermediate Coils in a Magnetic Coupled Resonant Wireless Power Transfer System

Dongsheng Yang, Jiangwei Tian, Sokhui Won, Bowen Zhou, Zixin Cheng and Bo Hu
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Dongsheng Yang: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Jiangwei Tian: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Sokhui Won: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Bowen Zhou: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Zixin Cheng: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Bo Hu: State Grid LiaoNing Electric Power Supply Company Limited, Shenyang 110004, China

Energies, 2019, vol. 12, issue 20, 1-16

Abstract: Coaxial coil topology is used as the transfer medium in traditional MCR-WPT (Magnetic Coupled Resonant Wireless Power Transfer) systems to improve the transfer characteristics. The intermediate coils are added to extend the transmission distance, whose positions are critical. This paper focuses on the optimal intermediate coil positions for an MCR-WPT system with four coaxial planar circular spiral coils. By modeling the MCR-WPT system, the mathematical expression of the self-inductance and the mutual inductance are used to calculate the load power of the MCR-WPT system, which is composed of four planar circular spiral coaxial coils, and using MATLAB. The optimal distance ratio between the adjacent coils for maximizing the power of load is proposed. Furthermore, the experiments are implemented from the network analyzer and the experimental platform. In the platform, the load power is measured at the different intermediate coil positions, and the optimal position at which the load power is maximized is found. Both experimental results obtained by the network analyzer and the experimental platform have validated the theoretical and simulation results and provided the correctness of the suggested ratios.

Keywords: wireless power transfer; coaxial coil; intermediate coil; distance coefficient; network analyzer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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