高压功率模块有机硅凝胶封装绝缘失效与电-热性能协同调控研究综述OA

High-voltage power modules in converter equipment are subjected to long-term combined stresses,including high electric fields,high temperatures,and high dU/dt,making packaging insulation failure a critical issue for reliable op-eration.This paper reviews the failure mechanisms and coordinated regulation of electro-thermal performance in silicone-gel packaging insulation and its gel-solid interfaces,as well as electro-thermal coordinated regulation.The typical packaging structures of high-voltage power modules and insulation condition sensing methods are summarized.Then,the material properties and initial insulation state of silicone-gel packaging insulation are reviewed,followed by an analysis of high-temperature degradation and interfacial deterioration,as well as the aging-induced evolution of the electrical,thermal,and mechanical properties of insulating materials.The development mechanisms of partial discharge,gel-solid interfacial discharge,and electrical treeing under coupled multi-stress conditions are further discussed.On this basis,re-cent advances in local electric-field regulation,thermal-conductivity enhancement,and electro-thermal performance optimization are comparatively analyzed.Finally,future research directions are proposed in terms of quantitative fail-ure-path modeling,multi-parameter condition sensing and lifetime assessment,electro-thermal coordinated design,and evaluation under realistic service conditions.This review provides reference for understanding insulation failure mecha-nisms,optimizing packaging materials,and improving the reliability design of packaging insulation in high-voltage power modules.