基于频段导向的PWM逆变器主动热管理控制  

Band-oriented active thermal management control of PWM inverter

作　　者：黄守道[1] 陈叶宇 刘平[1] 荣飞[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力自动化设备》2017年第5期34-39,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51507055)~~

摘　　要：对绝缘栅双极型晶体管(IGBT)进行主动热管理,是提高器件使用寿命和降低逆变器运行维护成本的有效途径,然而,输出频率对器件的结温性能的影响往往被忽略。因此,基于频段导向,针对电压型PWM逆变器提出了一种主动热管理控制的新方法。通过损耗计算和实时结温观测,在低输出频率区域采用滞环控制调节开关频率,在高输出频率区域对电流进行限幅。仿真结果表明,该控制策略能有效降低器件平均结温和结温波动,提高热容量利用率,改善逆变器可靠性,延长器件使用寿命。Active thermal management of IGBT（Insulated Gate Bipolar Transistor） is an effective way to improve the lifetime of module and reduce the maintenance cost of inverter,where the effect of output frequency on the junction temperature is often ignored. A strategy of active thermal management control according to the output frequency band is proposed for the voltage-source PWM inverter. Based on the loss calculation and real-time junction temperature monitoring,the switching frequency is adjusted by hysteresis control in the low output frequency band while the current is limited in the high output frequency band. The simulative results show that,the proposed strategy effectively lowers the average junction temperature and junction temperature fluctuation,enhances the utilization rate of thermal capacity, and improves the reliability of inverter and prolongs the lifetime of module.

关 键 词：电压型PWM逆变器 绝缘栅双极型晶体管 可靠性 主动热管理 结温控制 频段导向 

分 类 号：TM46[电气工程—电器]