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A parameter-centric Approach for Enhancing Misalignment Tolerance in Wireless Power Transfer Systems

IEEE Transactions on Power Electronics 2025年

作者： Yuan, Zhaoyang Yang, Qingxin Cai, Changsong Zhang, Pengcheng Wang, Ran Ma, Xianjie Lin, Hongjian Saeedifard, Maryam Wuhan University Hubei Key Laboratory of Power Equipment & System Security for Integrated Energy School of Electrical Engineering and Automation Wuhan 430072 China Tianjin University of Technology Tianjin 300384 China Tsinghua University Department of Electrical Engineering Beijing 100084 China Heze Power Supply Company State Grid Shandong Electric Power Company Heze 274000 China Laixi Power Supply Company State Grid Shandong Electric Power Company Qingdao 266600 China University of Alberta Department of Electrical and Computer Engineering T6G 2R3 AB Canada Georgia Institute of Technology School of Electrical and Computer Engineering Atlanta 30332 GA United States

This paper introduces a misalignment-tolerant design method for wireless power transfer (WPT) systems by optimization of compensation network parameters. Leveraging the derivation of two-port impedance parameters and adjoint sensitivity analysis, the coupling misalignment characteristics of the system are assessed. Subsequently, a parameter-centric misalignment tolerant approach, independent of the coil structure, is established through a linear fitting method. The proposed approach ensures zero-voltage switching (ZVS) and facilitates efficient stable constant current (CC) output. Experimental validation is performed on a scaled-down 500-W rated SS-compensated WPT prototype equipped with non-specialized square-shaped coils, demonstrating the effectiveness of the proposed approach. The proposed method enhances the SS-compensated system's ability to tolerate both horizontal and vertical misalignments, surpassing the performance of conventional SS topologies. Specifically, the system achieves over 85% efficiency within the misalignment tolerance range, with a peak efficiency of 93.2%. Additionally, the load current variation remains within 5.8% for 100 mm x-misalignment and -15 to +50 mm z-misalignment. © 1986-2012 IEEE.

关键词： constant current (CC) output misalignment tolerance parameter-centric optimization Wireless power transfer (WPT) zero-voltage switching (ZVS)

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