地铁车辆运行条件下IGBT器件过热报警问题分析研究

Analysis on the Overheating Alarm of IGBT Devices Under the Operating Condition of Metro Vehicles

针对宁波地铁2号线车辆压道运行工况下频繁出现IGBT器件过热报警问题,分别开展MP2车和M2车在压道运行工况和正线运行工况下的温升测试,并利用FLUENT软件对热管散热器和IGBT器件进行仿真分析。研究结果表明,受车体底部设备阻挡,地铁车辆牵引逆变器热管散热器进出风口的风速为车辆速度的15%~40%;压道运行工况下,MP2车热管散热器的进口平均风速低于M2车,是MP2车频繁报IGBT器件过热的根本原因;正线运行工况下,热管散热器的进口平均风速为6 m/s,可以保证IGBT器件的可靠应用。温升测试与仿真分析方法可为地铁车辆牵引逆变器的热设计工作提供理论指导。

In view of the frequent overheating of IGBT devices under the ballast operation condition of vehicles of Ningbo Metro Line 2,the temperature rise test under the ballast operation condition and the main line operation condition was carried out for MP2and M2vehicles respectively,and the heat pipe radiator and IGBT devices were simulated using FLUENT software.The results show that the wind speed at the inlet and outlet of the heat pipe radiator of the traction inverter of metro vehicles is about 15%~40%of the vehicle speed due to the obstruction of the equipment at the bottom of the vehicle body.Under the working condition of ballast operation,the average inlet wind speed of heat pipe radiator of MP2vehicle is lower than that of M2vehicle,which is the fundamental reason why MP2car frequently reports that IGBT devices are overheated.Under the operating condition of the main line,the average inlet wind speed of the heat pipe radiator is 6 m/s,which can ensure the reliable application of IGBT devices.The method of temperature rise test and simulation analysis can provide theoretical guidance for the thermal design of metro vehicle traction inverter.