Influence of hybrid laminated remanufactured stator core on no‐load air‐gap magnetic density

Considering the cost and performance of the remanufactured motor, a motor remanufacturing method with a hybrid stator core structure was proposed, a prototype of the remanufacturing motor was made and the experiment was carried out. The modified magnetic circuit model of the hybrid stator motor was established by fitting the B–H curves of the two materials to consider the influence of the stator material. The errors for silicon steel and amorphous alloy were approximately 4.9 and 4.3%, respectively. The variation in no-load air-gap magnetic density along the axial direction was studied via simulation, and the air-gap flux density decreases gradually from the centre of silicon steel segment to the centre of amorphous alloy segment. A deflection occurs in the distribution of the air-gap magnetic field, which is in connection with the saturation degree of the materials. The method for calculating the air-gap magnetic density of the hybrid laminated stator from the magnetic density of the two materials was proposed. Compared with the stator composed of only one material, the calculation result obtained by the proposed method is in good agreement with the simulation result, with an error of