Abstract

The inevitable coils misalignment of the loosely coupled transformer (LCT) and load variations in a wireless EV (electric vehicle) charging system can dramatically affect the output and input characteristics. In this paper, a resonant method is investigated for a closed-loop LCC-series compensated inductive power transfer (IPT) system. With the proposed method, coupling- and load-independents voltage transfer characteristic and zero phase angle (ZPA) operation are achieved simultaneously. A laboratory prototype is implemented and the validity of proposed LCC-series compensated IPT system is verified.

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