CAJ | 학술논문

变频电机在转子发生故障时,在逆变器直流侧电流中会产生相应的故障特征信号.基于信息融合的思想,通过对逆变器直流侧电流进行分段滤波的方法,获得其低频段和高频段信号,对高频段信号做Hilbert变换后,计算其Hilbert模量,再对低频段信号和高频段信号的Hilbert模量做融合相关处理.融合频谱故障特征频率分量更加突出,提高了诊断的可靠性,实验结果证实了该方法的有效性.
변빈전궤재전자발생고장시,재역변기직류측전류중회산생상응적고장특정신호.기우신식융합적사상,통과대역변기직류측전류진행분단려파적방법,획득기저빈단화고빈단신호,대고빈단신호주Hilbert변환후,계산기Hilbert모량,재대저빈단신호화고빈단신호적Hilbert모량주융합상관처리.융합빈보고장특정빈솔분량경가돌출,제고료진단적가고성,실험결과증실료해방법적유효성.
@@@@When the variable frequency motor rotor failures,a corresponding fault characteristic signal will produce in the invert-er DC current. Based on the ideas of information fusion,through the method of segment filtering in the current of inverter DC side, the low-frequency signal and high-frequency signal were obtained. After doing Hilbert transform for high-frequency signal,the Hilbert modulus was calculated,then the low frequency band signal and high-frequency Hilbert modulus were made the integration-related pro-cessing. Fault characteristic frequency component in the integration spectrum is more prominent,which improves the diagnostic relia-bility. The experimental results show that the method is effective.