Design of Magnetic Coupler for Wireless Power Transfer

Heqi Xu, Chunfang Wang, Dongwei Xia and Yunrui Liu
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Heqi Xu: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Chunfang Wang: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Dongwei Xia: College of Electrical Engineering, Qingdao University, Qingdao 266071, China
Yunrui Liu: College of Electrical Engineering, Qingdao University, Qingdao 266071, China

Energies, 2019, vol. 12, issue 15, 1-12

Abstract: In order to improve the restraint ability of electromagnetic energy in space and improve the coupling efficiency, a magnetic coupler structure with composite magnetic shield is proposed. Firstly, the model is established by using the finite-element simulation software. Then, according to the limit of public exposure to time-varying electromagnetic fields pointed out in ICNIPR (International Commission on Non-Ionizing Radiation Protection) guidelines, the characteristics and spatial magnetic field distribution of magnetic couplers with a single shielding structure, double shielding structure, and composite shielding structure are compared and analyzed. Finally, the experimental results show that the structure of magnetic couplers with a composite magnetic shield has a good effect in strengthening magnetic field concentration and reducing the electromagnetic interference of wireless charging systems to the external environment. It also has the advantages of smaller volume, lighter weight, and lower cost, and can effectively improve the transmission efficiency and enhance the stability of wireless charging systems.

Keywords: wireless power transfer; magnetic shield; coupling coefficient; magnetic coupler (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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