Optimization Design of Active and Passive Hybrid Shielding, for Electric Vehicle’s Wireless Power Transfer System
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https://doi.org/10.13052/2026.ACES.J.410110关键词:
Electromagnetic exposure safety, extreme learning machine, hybrid shielding structural design, multi-objective optimization algorithm, wireless power transmission摘要
Targeting the issues of electromagnetic exposure safety in the application of an electric vehicle’s wireless power transmission (WPT), this study proposes a surrounding active shield coils structure, laying on the four sides of the WPT system, which effectively reduces the lateral magnetic leakage field while supplementing the magnetic field inside the transmission channel. At the same time, this study proposes a ferrite groove structure as the passive shielding, achieving reduction of the vertical magnetic leakage field. On this basis, the paper takes system transfer efficiency and surrounding magnetic leakage field density as the optimization objectives, combining the extreme learning machine (ELM) surrogate model with multi-objective optimization algorithm for hybrid shielding structural design, realizing the further improvement of power transfer and electromagnetic shielding capability. A numerical simulation test is carried out and the results show that the proposed shielding scheme can ensure the system transfer efficiency, meanwhile reducing the magnetic leakage from all directions, and providing effective electromagnetic exposure safety protection for the human body.
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