关键词: 永磁驱动电机, 电动汽车, 铁心损耗, 生产工艺

Abstract: Focusing on the core losses generated in permanent magnet drive motor during operation, this paper investigates a power 270 kW,speed 20 000 r/min permanent magnet drive motor. The study conducts an in-depth analysis of the distribution patterns of stator and rotor core losses and their impact on motor efficiency. The research specifically explores the influence of manufacturing processes on iron losses. By comparing and testing different stator core assembly methods ,including welding versus adhesive bonding,annealing treatments,and varying interference fit magnitudes,the paper analyzes the mechanisms by which these process variables affect core loss density. Prototype testing confirms that optimizing manufacturing processes is an effective approach to reducing core losses and enhancing the overall efficiency of drive motor.

Key words: permanent magnet drive motor, electric vehicles, core loss, process factor