The junction temperature online measurement of power transistors is important for both the optimal operation and reliability of power electronics converters. The real-time junction temperature during the operation of a converter can be used to monitor the health of power modules to reduce losses and increase lifetime, including degradation monitoring, maintenance scheduling or even the implementation of active thermal control. This paper summarized different methods used to measure the junction temperature of power transistors in power electronic converters. Firstly, three main methods for the temperature evaluation of power semiconductor devices are presented and discussed, their advantages and disadvantages are also analyzed. On this basis, the online junction temperature measurement methods are classified into two categories: the methods based on thermal models, and the methods based on thermo-sensitive parameters. Then, these methods and their principles are summarized. In addition, the barriers and limitations of these methods for wider scale implementation are discussed. At last, the research trends are indicated.%功率晶体管结温的在线测量对于电力电子变换器的优化运行以及可靠性监测具有重要意义.实时获取的晶体管结温可用于退化监测、日常维护以及进行有效的热控制来减少功率损耗,提高寿命.对现有的电力电子变换器中功率晶体管结温测量方法进行归纳整理.首先介绍目前功率晶体管结温离线获取的三类方法,并分析各自的优缺点.在此基础上,将现有的功率晶体管结温在线获取方法分为基于热模型的结温测量和基于热敏电参数的结温测量两大类.详细介绍各功率晶体管结温在线测量技术的工作原理,并对各个方法进行总结,分析各自的优势及不足,最后指出功率晶体管结温在线测量的研究难点以及今后的研究方向.
展开▼
