天津工业大学学报2026，Vol.45Issue(4)：73-79,7.DOI:10.3969/j.issn.1671-024x.2026.04.009
电动汽车无线充电系统的悬浮电位抑制策略
Floating potential suppression strategy for wireless charging system of electric vehicles
摘要
Abstract
In order to improve the safety of the wireless charging system for electric vehicles(EV-WCS),the floating po-tential(FP)suppression strategy for the electric shielding is proposed.By analyzing the shielding structure and coupling circuits,the constraint equations for the FP of the electrical shielding layer are derived,and it is nu-merically calculated using the field-circuit coupling method.A common-mode filter is added to the rectifier sec-tion of a high-frequency inverter,and a bipolar pulse signal modulation method is used in the inverter section to effectively attenuate the common-mode component output by a high-frequency inverter power supply.Mean-while,the coupling coils are wired in double layers.An 85 kHz EV-WCS is built,the FP of the electric shield is extracted using a front-end differential floating ground measurement technique to verify the effectiveness of the proposed method.The experimental results show that after adopting the proposed method,the peak floating po-tential of the electric shielding layer drops from 1 041.10 V to 65.25 V under a transmission power of 12.9 kW,and the electrocution current reduces to 0.91 mA in simulated human electrocution experiments,which reaches the standard of non-inductive current of human body.关键词
电动汽车/变流器/无线充电系统/悬浮电位Key words
electric vehicles/converter/wireless charging system/floating potential分类
信息技术与安全科学引用本文复制引用
祝丽花,赵帅,李元,田忠莹..电动汽车无线充电系统的悬浮电位抑制策略[J].天津工业大学学报,2026,45(4):73-79,7.基金项目
国家自然科学基金面上项目(52277016) （52277016）
国家自然科学基金优秀青年科学基金项目(52122701) （52122701）
