孙昱,谷立臣.负载振动与气隙偏心下电机电流调制机理分析[J].电子测量与仪器学报,2017,31(2):322-327
负载振动与气隙偏心下电机电流调制机理分析
Stator current modulation mechanism analysis of induction motor under load torque vibration and gap eccentricity
  
DOI:10.13382/j.jemi.2017.02.023
中文关键词:  电机  定子电流  负载转矩振动  气隙偏心  Wigner时频分析
英文关键词:induction motor  stator current  load torque vibration  gap eccentricity  Wigner time frequency domain analysis
基金项目:国家自然科学基金(51679399)、西安建筑科技大学青年基金(QN1532)资助项目
作者单位
孙昱 西安建筑科技大学西安710055 
谷立臣 西安建筑科技大学西安710055 
AuthorInstitution
Sun Yu Xi’an University of Architecture and Technology, Xi’an 710055, China 
Gu Lichen Xi’an University of Architecture and Technology, Xi’an 710055, China 
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中文摘要:
      分别分析了感应电机负载转矩振动和气隙偏心对定子电流的调制机理,同时针对转矩振动频率与电机转子转频一致时,两者对定子电流调制结果在频域上难以区分开的特点,利用Wigner时频域分析方法,计算了负载转矩振动和气隙偏心时电流边频分量的相位差,指出二者时频分布特征的区别,为有效、准确地进行电机气隙偏心故障诊断提供理论依据。
英文摘要:
      The modulation on stator current signal of induction motor under the situation of load torque vibration and gap eccentricity is analyzed respectively. In view of that the modulation results in these two cases are difficult to be distinguished in frequency domain while the vibration frequency and rotor frequency are consistent, the Wigner time frequency domain analysis method is used to calculate the phase difference of side frequency current. The work in this paper points out the difference of modulation effects between load torque vibration and gap eccentricity in time frequency domain, which provides theoretical basis for motor air gap eccentric fault diagnosis.
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