Soda Naoya, Enokizono Masato
Department of Electrical and Electronic Systems Engineering, Graduate School of Science and Engineering, Ibaraki University; Hitachi 316-8511, Japan.
Vector Magnetic Characteristic Technical Laboratory, Usa 879-0442, Japan.
Sensors (Basel). 2020 Mar 5;20(5):1418. doi: 10.3390/s20051418.
In this paper, a stator core shape design method is proposed for an improvement in the power density of a small surface-mounted permanent magnet (SPM) motor. In order to improve the power density of a motor, it is necessary to increase its torque or reduce its weight. However, when a stator core shape is miniaturized to reduce the weight of the motor, the winding regions in a motor frequently decrease. Our stator core shape design method improves the power density of a motor by reducing its weight without decreasing the torque and keeping the winding regions constant. Moreover, the core loss of a motor also decreases when using our method. A Bezier curve is used for the determination of a stator core shape. The finite element method in consideration of the vector magnetic properties is used to evaluate the core loss of the motor shaped by our method. As a result, the power density of an SPM motor is improved, and the core loss of the motor decreases.
本文提出了一种定子铁心形状设计方法，以提高小型表面贴装永磁（SPM）电机的功率密度。为了提高电机的功率密度，有必要增加其转矩或减轻其重量。然而，当定子铁心形状小型化以减轻电机重量时，电机中的绕组区域经常会减少。我们的定子铁心形状设计方法通过减轻电机重量来提高其功率密度，同时不降低转矩并保持绕组区域不变。此外，使用我们的方法时，电机的铁损也会降低。采用贝塞尔曲线来确定定子铁心形状。考虑矢量磁特性的有限元方法用于评估用我们的方法成型的电机的铁损。结果，SPM电机的功率密度得到提高，且电机的铁损降低。
