感应电机转子断条位置影响分析

Influences of position of broken rotor bars of induction motors

对感应电机转子断条的位置及其影响进行研究,分析电机转子断条位置与定子电流中转子绕组故障特征量之间的关系,转子断条位置与转子导条电流、转子端环电流之间的关系,并总结出其规律性;揭示了过去人们试图把定子电流中故障特征量的大小作为电机转子断条根数多少的判据的局限性,提出了把断条引起电机的不对称性作为电机故障程度判据的新的理论.

A study is made on the position of broken rotor bars of induction motors and its influences. By analysis of the relationships between the position of broken rotor bars, fault characteristic value of rotor winding in stator current, and currents through rotor bars and end rings, the limitations are revealed for determination of the number of broken bars only based on the fault characteristic volue of stator current. Finally, a new theory is proposed, in which the asymmetry of the motor induced by broken bars is taken as the criterion for determination of the degree of motor faults.