With the rapid promotion of wireless power transmission technology (WPT) in the fields of electric transportation, smart devices, and medical implants, it poses new engineering challenges to the insulation performance of power safety tools. This study systematically evaluated the synergistic aging effect of composite electromagnetic fields of power frequency and wireless power transmission on the electrical thermal microstructural properties of solid insulation materials. A multidimensional measurement index system was constructed based on standards such as ASTM D257, IEC 60250, and IEC 60243, combined with DSC, TGA, SEM/EDS, and partial discharge testing; The performance attenuation law under different frequencies, field strengths, and material combinations was investigated through orthogonal experiments and control group design. The results indicate that high-frequency excitation in the WPT frequency band significantly accelerates the increase of dielectric loss factor and the decrease of partial discharge initiation voltage, and the frequency dependence is closely related to the microstructure of the material; The thermal electric coupling effect generated under composite field loading further exacerbates the formation of material microcracks and surface electrical traces. The research results of this article provide theoretical and experimental basis for the reliability prediction of power safety tools in WPT environment.
