轴向磁场电机永磁体空载涡流损耗减小方法对比研究OACSTPCD

The main methods to reduce the no-load eddy current loss of permanent magnets of axial magnetic field motors include:reducing the width of the stator slot opening,increasing the length of the air gap,dividing the permanent magnet into blocks,using shielding layers and magnetic slot wedges,etc.Based on a simplified 2D analysis model of a permanent magnet axial field motor,the effects of reducing stator slot opening width and increasing air gap length,using shielding layers and magnetic slot wedges to reduce no-load eddy current losses are analyzed.The effects of different segmentation methods of permanent magnets on reducing no-load eddy current losses are studied through three-dimensional electromagnetic field simulation.The research results indicate that reducing the width of the stator slot opening has the best effect;although increasing the length of the air gap can significantly reduce eddy current losses,the amount of permanent magnets used increases rapidly;the segmented permanent magnet has a better effect on reducing eddy currents,and the circumferential segmentation method is the best;the shielding layer has a counterproductive effect;the effect of using segmented magnetic slot wedges is slightly worse than reducing the width of stator slot openings,but the processing technology difficulty is lower.