中国电机工程学报2023，Vol.43Issue(24)：9447-9460,中插6,15.DOI:10.13334/j.0258-8013.pcsee.223125
多能变换装备功率模块封装绝缘的"胶-固"沿面放电演化过程研究
Research on the Evolution Process of"Gel-solid"Creeping Discharge of Power Module Package Insulation of Multi-energy Conversion Equipment
摘要
Abstract
The power modules of multi-energy conversion equipment are prone to form creeping discharges at the interface of silicone gel and ceramic substrate.In this paper,the discharge characteristics of gel-solid insulation under high-frequency electrical stress,the development process of bubble injection and the damage characteristics of ceramic substrate are investigated.Based on the solid-liquid duality and self-healing of silicone gel,the problem of creeping discharge is transformed into a bubble development problem,and the failure law and damage mechanism of gel-solid insulation are explored.The study shows that the pulse signal of gel-solid creeping discharge is concentrated after the reversal of voltage polarity and near the peak,and the number and amplitude of discharge increase first and then decrease with the increase of frequency and increase monotonically with the increase of temperature.The different degassing methods reveal that the bubbles inside the silicone gel and the sintered air gap of the substrate are important factors affecting the creeping discharge.The damage of the substrate is related to the flow injection characteristics of the gel-solid interface and has a significant influence on the development of creeping discharge.The results can provide some reference for the design of IGBT package insulation structure.关键词
陶瓷基板/有机硅凝胶/胶-固沿面放电/气泡/固-液两相性/损伤特性Key words
ceramic substrate/silicone gel/gel-solid creeping discharge/bubble/solid-liquid duality/damage performance分类
信息技术与安全科学引用本文复制引用
王健,闫豪生,陈晨,王伟,李志辉,邹亮,张黎,李庆民..多能变换装备功率模块封装绝缘的"胶-固"沿面放电演化过程研究[J].中国电机工程学报,2023,43(24):9447-9460,中插6,15.基金项目
国家重点研发计划项目(2021YFB2601404).National Key R&D Program of China(2021YFB2601404). （2021YFB2601404）
