Slot opening displacement technique for cogging torque reduction of axial flux brushless DC motor for electric two-wheeler application

A. N. Patel
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引用次数: 1

Abstract

Introduction. Reduction of cogging torque is the crucial design consideration of axial flux brushless DC (BLDC) motor, particularly for low-speed applications. Aim. The slot opening displacement technique is presented in this article to reduce cogging torque in axial flux BLDC motors suitable for electric two-wheeler applications. Methods. Double rotor single stator configuration of axial flux BLDC motor is the most suitable for such vehicular applications. Initially double rotor single stator 250 W, 150 rpm axial flux BLDC motor is designed with stator slot opening in middle position and considered as reference motor for further analysis. To evaluate the cogging torque profile of the reference motor 3D finite element modeling and analysis are performed. The design is enhanced by dividing all stator teeth into groups and displacing the slot openings of each group in opposite direction with respect to the adjacent group. Results. The influence of slot opening displacement on cogging torque is evaluated with finite element modeling and analysis. As cogging torque is reduced from 1.23 N×m to 0.63 N×m, the slot opening displacement technique is found to be effective in reducing cogging torque of axial flux BLDC motor.
电动两轮用轴向磁通无刷直流电机开槽减矩技术
介绍。减小齿槽转矩是轴向磁通无刷直流(BLDC)电机设计的关键考虑因素,特别是在低速应用中。的目标。本文提出了一种减小电动两轮车用轴向磁通无刷直流电机齿槽转矩的开槽位移技术。方法。轴向磁通无刷直流电机的双转子单定子结构最适合此类车载应用。初步设计双转子单定子250w, 150rpm轴向磁通无刷直流电机,定子槽开在中间位置,作为进一步分析的参考电机。为了评估参考电机的齿槽转矩分布,进行了三维有限元建模和分析。通过将所有定子齿划分为组,并将每组齿槽的开口相对于相邻组的方向相反,该设计得到了改进。结果。通过有限元建模和分析,评估了开槽位移对开槽扭矩的影响。将齿槽转矩从1.23 N×m减小到0.63 N×m,发现开槽位移技术可以有效地减小轴向磁通无刷直流电机的齿槽转矩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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