电压源逆变器中器件结温与输出频率的关系  

Relationship between Junction Temperature of Device and Output Frequency in Voltage Source Inverters

作　　者：杨珍贵[1] 周雒维[1] 杜雄[1] 孙鹏菊[1] 毛娅婕[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《水电能源科学》2013年第11期204-208,共5页Water Resources and Power

基　　金：国家自然科学基金资助项目(51137006);全国优秀博士论文作者专项基金资助项目(200948);输配电装备及系统安全与新技术国家重点实验室基金资助项目(2007DA10512711101)

摘　　要：针对电力电子变换器中绝缘栅双极晶体管(IGBT)功率器件的结温及其幅值变化直接影响器件热失效进程的问题,通过结合热模型及损耗模型实现了器件结温的在线实时估算,给出了器件结温与功耗及输出频率之间的定量关系,在MATLAB/Simulink中建立了电流峰值控制的单相电压源逆变器模型,仿真结果验证了器件结温变化与输出频率之间的定性关系。结果表明,输出频率越低,器件结温变化越大,依据结温与输出频率之间的数学关系,采用简单的指数拟合关系式代替其复杂的指数表达式,更便于工程实际应用。The junction temperature ant its variation of Insulated Gate Bipolar Transistor （IGBT） directly affect the speed of thermal failure in power electronic converters. The junction temperature of device is estimated on-line directly based on the thermal model and loss model. Then the quantitative relationship among junction temperature of device, power loss and output frequency is presented. The qualitative relationship between temperature variation and output fre- quency is verified by the simulation result of the current controlled of single phase Voltage Source Inverter （VSI）, which was established in the MATLAB/Simulink. The result shows that the smaller the output frequency is, the larger the junction temperature variation is. According to the mathematical relationship between junction temperature and output frequency, a simple fitting exponent relation of them is given to replace their complex expression so as to benefit practical engineering application.

关 键 词：绝缘栅双极晶体管 热模型 损耗模型 结温 输出频率 

分 类 号：TM464[电气工程—电器]