成型绕组永磁电机优化设计

成型绕组电机净槽满率高,在电机的额定功率、冷却系统、定子内外径、定子槽面积不变的条件下,采用成型绕组时,电机铁心长度更短,转矩密度更高。将节距为1的传统上下双层成型绕组结构改为左右放置,降低了成型绕组的绕制难度,提高了生产效率。开口槽槽口宽度较大,会增加气隙磁密中的谐波含量,降低电机运行稳定性。采用Taguchi方法,以成型绕组电机的气隙长度、定子槽宽和槽深为优化变量,对齿槽转矩、输出转矩进行优化;并建立电机模型进行有限元仿真分析。最终,通过样机试验验证了扁铜线成型绕组电机方案设计的合理性。

Optimal Design of Forming Winding Permanent Magnet Motor

Based on the high net slot filling rate, the forming winding can make the iron core length shorter and the torque density higher when the rated power, cooling system, inner and outer diameters of stator, and stator slot area keep unchanged. The traditional upper and lower double-layer forming winding structure with pitch 1 is changed to left and right structure, in which the forming difficulty of winding is reduced and the production efficiency is improved. Due to the large width of slot opening, the harmonic content in the air gap magnetic flux density will be increased and the operation stability will be reduced. Thus, the Taguchi method is used to optimize the cogging torque and output torque of motor with air gap length and stator slot width and depth as optimization variables. The finite element analysis model of the motor is established and simulation is performed with this model. The prototype experiment verifies the rationality of the design of the forming winding.