电机与控制应用
電機與控製應用
전궤여공제응용
ELECTRIC MACHINES & CONTROL APPLICATION
2015年
4期
32-36
,共5页
小波包分解%低频运行%特征频率%低频段序列
小波包分解%低頻運行%特徵頻率%低頻段序列
소파포분해%저빈운행%특정빈솔%저빈단서렬
wavelet packet decomposition%low frequency operation%characteristic frequency%low frequency sequence
电机低频运行时发生故障的特征频率与电源频率之间的差值较小，采用传统的3层小波包分解法不能满足频率细化的要求。对电机在正常和故障两种运行状态下的定子电流信号进行8层小波包分解，细化了电机电流低频段序列，提取出能够较为准确反映电机故障的特征向量。将其特征能量进行了对比分析，从正常和故障信号的特征能量对比结果证明了利用8层小波包分解和重构的方法能够更准确地判断电机故障。
電機低頻運行時髮生故障的特徵頻率與電源頻率之間的差值較小，採用傳統的3層小波包分解法不能滿足頻率細化的要求。對電機在正常和故障兩種運行狀態下的定子電流信號進行8層小波包分解，細化瞭電機電流低頻段序列，提取齣能夠較為準確反映電機故障的特徵嚮量。將其特徵能量進行瞭對比分析，從正常和故障信號的特徵能量對比結果證明瞭利用8層小波包分解和重構的方法能夠更準確地判斷電機故障。
전궤저빈운행시발생고장적특정빈솔여전원빈솔지간적차치교소，채용전통적3층소파포분해법불능만족빈솔세화적요구。대전궤재정상화고장량충운행상태하적정자전류신호진행8층소파포분해，세화료전궤전류저빈단서렬，제취출능구교위준학반영전궤고장적특정향량。장기특정능량진행료대비분석，종정상화고장신호적특정능량대비결과증명료이용8층소파포분해화중구적방법능구경준학지판단전궤고장。
The difference between failure occurs when the motor is running low frequency characteristic frequency and power frequency between the smaller, traditional three-layer wavelet packet analysis method can not meet the requirements of the frequency of refinement. The motor under normal operating status and fault two stator current signal 8 layer wavelet packet decomposition, refined motor current low frequency sequence extracted motor failure can be more accurately reflects the characteristics of the vector, and were characterized by energy comparative analysis, comparing the energy characteristics of normal and fault signals from the results demonstrate the use of wavelet packet decomposition and reconstruction of eight layers can more accurately determine motor failure.
