HXD1C型电力机车牵引变流器功率模块的振动测试与分析

Vibration test and analysis of power module of traction convertor for HXD1C electric locomotive

为获得电力机车牵引变流器核心部件的振动特性,开展HXD1C型电力机车的线路运行振动测试,从时域、频域和特征频率等角度分析牵引变流器功率模块的振动特性,并分析不同线路、IGBT器件开关频率对功率模块振动的影响。研究结果表明:功率模块的振动主要来自电容,电容的纵向振动大于横向和垂向,在900、1100、1700、1800 Hz等频率处振动较大;水冷散热器的横向振动大于纵向和垂向,在900、1000、1100、1500、1700 Hz等频率处振动较明显;重庆至内江的振动最大,其次为兰州至武威南,兰州至陇西的振动最小。振动测试与分析可为电力机车牵引变流器功率模块的振动优化提供指导。

In order to obtain the vibration characteristics of the core components of the traction convertor of electric locomotive,the line running vibration test of HXD1C electric locomotive is carried out.The vibration characteristics of the power module of the traction convertor are analyzed from the perspectives of time domain,frequency domain and characteristic frequency,and the influence of different lines and switching frequency of IGBT devices on the vibration of the power module is analyzed.The results show that the vibration of the power module mainly comes from the capacitor,and the longitudinal vibration of the capacitor is larger than the transverse and vertical vibration,and the vibration is larger at frequencies of 900,1100,1700 and 1800 Hz.The transverse vibration of the water-cooled radiator is greater than the longitudinal and vertical vibration,and the vibration is obvious at frequencies of 900,1000,1100,1500 and 1700 Hz.The vibration from Chongqing to Neijiang is the largest,followed by Lanzhou to Wuweinan,and Lanzhou to Longxi is the smallest.Vibration test and analysis can provide guidance for vibration optimization of traction convertor power module of electric locomotive.