智能功率模块失效分析与应用过程中的可靠性研究

Failure Analysis of Intelligent Power Module and Reliability Research of Application Process

智能功率模块在变频空调中出现的电功能失效,不仅与智能功率模块本身技术参数相关,同时外围电路的布局也会影响智能功率模块在应用中的可靠性。通过大数据分析挖掘规律锁定失效模式,并利用典型的失效分析方法锁定智能功率模块的失效机理为过流短时间的窄脉冲信号导致过热,同时识别母线电流为智能功率模块应用过程中的关键敏感信号。通过优化地线环路,减小干扰产生的震荡负电压,减小对敏感信号的影响,从而提高智能功率模块在应用中的可靠性,为后续设计开发提供重要依据。

In view of the failure of the electrical function of the intelligent power module in the inverter air conditioner,it is not only related to the technical parameters of the intelligent power module itself,but also the layout of the peripheral circuit will affect the reliability of the intelligent power module in the application.The failure mode is locked by big data analysis mining law,and the failure mechanism of the intelligent power module is locked by the typical failure analysis method,which is the overheating caused by the narrow pulse signal that overflows for a short time,and the bus current is the sensitive signal in the application process of the intelligent power module.By optimizing the ground wire loop,the negative voltage caused by interference is reduced,and the impact on sensitive signals is reduced,so as to improve the reliability of the intelligent power module in the application,and provide an important basis for the subsequent design and development.