摘要
地铁线路牵引逆变器的IGBT模块结温波动非常复杂,容易引起IGBT模块发生疲劳失效。以北京地铁7号线为研究对象,根据列车牵引的最快速策略和额定载荷工况可以得到牵引逆变器的电气参数,再利用数据手册和IPOSIM软件算法得到IGBT模块的损耗。由数值模拟方法得到热管散热器随车辆速度变化的热阻曲线,通过热阻抗法计算出IGBT结温、IGBT壳温、二极管结温、二极管壳温和散热器温升曲线。利用LESIT疲劳寿命模型、雨流计数方法和线性累积损伤理论计算出IGBT芯片和二极管芯片的疲劳寿命。最后探讨了最经济策略、超载工况、环境温度、接触热阻和疲劳寿命模型参数等因素对芯片平均温度和疲劳损伤的影响。
During the operation of rail vehicle, there are many factors that complicate the fluctuation of IGBT module＇s junction temperature for traction invertor, and affect the fatigue life of IGBT module. Taking Beijing Metro Line 7 as the research object, the electrical parameters are obtained based on the most rapid strategy and rated load condition, and the losses of IGBT module are calculated based on the datasheet and calculation method of IPOSIM software. The thermal resistance curve of heat pipe radiator with the vehicle velocity is obtained by numerical simulation, the temperature curves of IGBT junction, IGBT case, diode junction, diode case and heat sink are calculated by using thermal impedance method. The fatigue life of IGBT chip and diode chip are obtained according to LESIT fatigue life model, rain flow counting method and linear cumulative damage law. Finally, the influence of the economic strategy, overload condition, circumstance temperature, contact resistance and life model parameter on the chip average temperature and fatigue damage are discussed.
作者
丁杰
张平
Ding Jie Zhang Ping(Xiangtan University Xiangtan 411105 China Zhuzhou CRRC Times Electric Co.,Ltd. Zhuzhou 412001 China)
出处
《电气工程学报》
2017年第10期9-18,共10页
Journal of Electrical Engineering
关键词
地铁车辆
牵引逆变器
IGBT模块
牵引计算
损耗
温升
疲劳寿命
Metro vehicle
traction inverter
IGBT module
traction calculation
loss
temperature rise
fatigue life
