摘要
对变频器逆变桥IGBT开路故障诊断方法做了对比研究,比较了平均电流Park矢量法、三相平均电流法和本文提出的基于傅里叶变换的归一化方法,实验结果表明,平均电流Park矢量法和三相平均电流法在稳态时可准确地进行IGBT开路故障诊断,定位故障管,但在突加、突减负载时易出现误诊断,本文提出的方法将电机电流平均值对基波分量进行归一化,解决了动态时误诊断问题,并采用基于dSPACE的系统平台证实了该方法的有效性。
Inverter IGBT open circuit fault diagnosis methods are comparatively studied,through comparison of the average current Park vector method,three-phase average current method and the proposed normalization based on Fourier transform method,experimental results show that the average current Park vector method and three-phase average current method can accurately diagnose IGBT open circuit fault and perform fault location,but wrong diagnosis often occurs in sudden loading or sudden load reduction conditions.The proposed normalization method solves the dynamic wrong diagnosis problem by normalizing the motor current average value according to fundamental component.Experiments based on dSPACE platform demonstrate the validity of the proposed method.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第9期30-35,共6页
Proceedings of the CSEE
基金
哈尔滨工业大学科研创新基金(HIT.NSRIF.2009040)~~
