考虑热耦合的全桥功率模块功率循环方法  

Power Cycling Method for the Full-Bridge Power Module Considering Thermal Coupling

作　　者：赵雨山 邓二平 刘鉴辉 潘茂杨 张莹 张传云 黄永章 Zhao Yushan;Deng Erping;Liu Jianhui;Pan Maoyang;Zhang Ying;Zhang Chuanyun;Huang Yongzhang(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;North China Branch of State Grid Corporation of China,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206 [2]国家电网有限公司华北分部,北京102206

出　　处：《半导体技术》2022年第9期704-711,共8页Semiconductor Technology

基　　金：国家自然科学基金资助项目(52007061)。

摘　　要：实际应用中,功率模块桥臂之间的热耦合非常普遍,提出了考虑热耦合的全桥功率模块功率循环方法,但电流路径很难与实际工况下的电流路径保持一致。通过时序电参数法,分析了有、无热耦合条件下功率循环试验中功率模块结温的分布特点。分析了电流路径对考虑热耦合的功率循环试验的影响,并进行了有、无热耦合条件下的功率循环试验。结果显示,考虑热耦合的功率循环试验应考虑电流路径差异造成的影响,热耦合对功率循环寿命有影响。通过有限元仿真,探究了热耦合和电流路径影响功率模块结温分布的机理,确定了考虑热耦合的功率循环方法。In practical applications,thermal coupling between bridge arms of the power module is very common.A power cycling method for the full-bridge power module considering thermal coupling was proposed,but the current path was difficult to keep consistent with the actual path.Through the sequential V(T)method,the distribution characteristics of junction temperature of the power module in the power cycling test with and without thermal coupling were analyzed.The influence of the current path on the power cycling test considering thermal coupling was analyzed,and the power cycling tests with and without thermal coupling were carried out.The results show that the power cycling test considering thermal coupling should consider the influence of current path differences,and thermal coupling has an impact on power cycling lifetime.Through the finite element simulation,the mechanism of the current path and thermal coupling affecting the junction temperature of the power module distribution was explored,and the power cycling method considering thermal coupling was determined.

关 键 词：热耦合 全桥功率模块 功率循环试验 时序电参数法 寿命 

分 类 号：TM464[电气工程—电器] TN386.2[电子电信—物理电子学]