Abstract: A permanent motor remanufacturing method was proposed, the components such as the casing, the end cover and the rotor were retained, and the stator was replaced by a hybrid stator core formed by axially laminating of amorphous alloy and silicon steel. Taking a hybrid stator core remanufacturing motor as object, the axial distribution of the no-load gap magnetic flux density was analyzed; the radial force density corresponding to the amorphous alloy stator and the silicon steel stator was calculated, and the strain numerical analysis of remanufactured motor was analyzed by the electromagnetic-mechanical coupling model; the axial distribution law of unit electromagnetic torque of remanufacturing motor was studied; the formula for calculating electromagnetic torque of remanufactured motor was deprived, and the torque imbalance caused by the unequal electromagnetic torque between amorphous alloy stator and silicon steel stator was found; the influences of torque imbalance on rotor core were analyzed. The remanufactured motors were fabricated and subjected to a vibration test, and the testing results confirm the correctness of the analysis.

Key words: hybrid stator core, remanufactured motor, electromagnetic torque, torque imbalance, strain numerical simulation

摘要： 提出将永磁电机的机壳、端盖、转子等零部件留用，定子铁心更换为由非晶合金叠片和硅钢叠片轴向混合叠压而成的混合定子铁心的永磁电机再制造方式。以一台混合定子铁心再制造电机为对象，分析了电机的空载气隙磁密轴向分布规律；计算了非晶合金定子和硅钢定子对应的径向力密度，应用电磁机械耦合模型对再制造电机应变进行数值分析；研究了再制造电机单位电磁转矩轴向分布规律，给出了再制造电机电磁转矩计算公式，发现了非晶合金定子和硅钢定子对应电磁转矩不相等引起的转矩不平衡现象，分析了转矩不平衡对转子铁心的影响。制作了再制造电机并进行了振动试验，试验结果证明了分析的正确性。

关键词: 混合定子铁心, 再制造电机, 电磁转矩, 转矩不平衡, 应变数值仿真