[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6113/JPE.2019.19.3.625

Leakage Magnetic Field Suppression Using Dual-Transmitter Topology in EV Wireless Charging

Zhu, Guodong (State Key Lab of Automotive Safety and Energy, Dept. of Automotive Eng., Tsinghua University)
Gao, Dawei (State Key Lab of Automotive Safety and Energy, Dept. of Automotive Eng., Tsinghua University)
Lin, Shulin (School of Mechanical Eng., University of Science and Technology Beijing)

Publication Information

Journal of Power Electronics / v.19, no.3, 2019 , pp. 625-636 More about this Journal

Abstract

This paper proposes an active leakage magnetic field (LMF) suppression scheme, which uses the dual-transmitter (DT) topology, for EV wireless charging systems (EVWCS). The two transmitter coils are coplanar, concentric and driven by separate inverters. The LMF components generated by the three coils cancel each other out to reduce the total field strength. This paper gives a detailed theoretical analysis on the operating principles of the proposed scheme. Finite element analysis is used to simulate the LMF distribution patterns. Experimental results show that when there is no coil misalignment, 97% of the LMF strength can be suppressed in a 1kW prototype. These results also show that the impact on efficiency is small. The trade-off between LMF suppression and efficiency is revealed, and a control strategy to balance these two objectives is presented.

Keywords

Control strategy; Dual-transmitter; EV wireless charging; Finite element analysis; Leakage magnetic field; Wireless power transfer;

Citations & Related Records

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