Double-Coil Dynamic Shielding Technology for Wireless Power Transmission in Electric Vehicles

Yuan Li, Shumei Zhang and Ze Cheng
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Yuan Li: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Shumei Zhang: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Ze Cheng: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China

Energies, 2021, vol. 14, issue 17, 1-20

Abstract: During wireless charging, the transmission distance of electric vehicles varies, resulting in different levels of electromagnetic field leakage. An improved active shielding technology, the double-coil dynamic shielding technology, is proposed in this paper for wireless power transfer (WPT) systems with different transmission distances. Modeling, simulation, and experiments are performed for the WPT system with a double-coil dynamic shielding scheme and compared with other cases. The results show that the proposed double-coil dynamic shielding scheme is able to shield approximately 70% of the electromagnetic field leakage for WPT systems at different transmission distances. In addition, it essentially causes no degradation in transmission efficiency (only 3.1%). The effectiveness and feasibility of the proposed scheme are verified.

Keywords: electromagnetic field; wireless power transfer; shielding (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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