摘要
IGBT模块封装时内部会集成负温度系数的温敏电阻(NTC)用以监控模块内部温度,工程应用中也多用这个电阻测定温度值来制定IGBT模块高温保护策略。但由于安装位置,NTC所处的热网络热时间常数较大等原因NTC温度与模块真实结温间还是有一些差距。本文通过搭建测试平台在某款车用电机控制器中测定了NTC温度在不同功率,不同冷却液温度、流量等不同工况下与模块结温关系,建立了该款控制器NTC温度与模块结温的关系模型,并通过仿真与实测结果对比分析验证了该模型的准确性。实验结果对其他使用NTC评估模块结温的场合也具有一定指导意义。
In the packaging of Insulated Gate Bipolar Transistor(IGBT)modules,the Negative Temperature Coefficient(NTC)thermistor is internally integrated to monitor the internal temperature of the module.In engineering applications,this thermistor is commonly used to measure temperature values for formulating high-temperature protection strategies for IGBT modules.However,due to installation location and factors such as the relatively large thermal time constant of the thermal network where the NTC is placed,there may be some discrepancies between the NTC temperature and the actual junction temperature of the module.This paper establishes a test platform to measure the relationship between NTC temperature and module junction temperature under different conditions,including various power levels,coolant temperatures,and flow rates,in a specific automotive motor controller.A relationship model between the NTC temperature and module junction temperature for this controller is developed.The accuracy of this model is verified through comparative analysis of simulation and experimental results.The experimental findings also provide certain guiding significance for other scenarios where NTC is used to assess module junction temperature.
作者
竹永辉
陈周帅
王荣
蔡巧娟
ZHU Yonghui;CHEN Zhoushuai;WANG Rong;CAI Qiaojuan(Xinpai Electronic Technology Co.Ltd.,Xi′an 720075,China)
出处
《应用能源技术》
2023年第8期6-10,共5页
Applied Energy Technology
关键词
IGBT模块
NTC
结温
壳温
电机控制器
IGBT module
NTC
junction temperature
casing temperature
motor controller
