This research work is aimed at the modification of in-wheel switched reluctance motor (Outer rotor-type SRM) with minimized torque ripple for electric vehicles. The geometry of stator and rotor poles affects the torque. Variation in the stator and rotor pole geometry causes change in the torque profile. To reduce the torque ripple and to increase the average torque, modification in the stator and rotor pole shoes is presented in this article. The stator and rotor pole shoes with notches and projections are proposed with the objective of minimization of torque ripple and maximization of average torque. Electromagnetic analysis of conventional and modified in-wheel SRM is done with computer-aided design software MagNet 7.1.1. From the finite element analysis results, the average torque and torque ripple values are derived. Prototype of 8/6, 1000 W in-wheel SRM with the notches and projections is fabricated. Experimentation is performed on the fabricated machine to measure the magnetic flux linkage, current and speed characteristics of the proposed in-wheel SRM. The precise determination of magnetic flux characteristics is significant to check the machine design and to accurately predict the action of modified in-wheel SRM. Static modeling results of the fabricated machine were coherent with the experimental values.

这项研究工作旨在改进轮毂开关磁阻电机（外转子型SRM），使电动汽车的转矩脉动最小。定子和转子磁极的几何形状会影响转矩。定子和转子磁极几何形状的变化会引起转矩曲线的变化。为了减少转矩波动并增加平均转矩，本文对定子和转子极靴进行了改进。提出了具有凹口和凸出部的定子和转子极靴，其目的是使转矩脉动最小化并且使平均转矩最大化。使用计算机辅助设计软件MagNet 7.1.1对常规和改进的轮毂SRM进行电磁分析。从有限元分析结果中，得出平均转矩和转矩波动值。8/6的原型，制作了带有凹槽和凸起的1000 W轮内SRM。在装配好的机器上进行了实验，以测量拟议的轮毂SRM的磁链，电流和速度特性。磁通量特性的精确确定对于检查机器设计并准确预测修改后的轮内SRM的作用非常重要。所制造机器的静态建模结果与实验值一致。磁通量特性的精确确定对于检查机器设计并准确预测修改后的轮内SRM的作用非常重要。所制造机器的静态建模结果与实验值一致。磁通量特性的精确确定对于检查机器设计并准确预测修改后的轮内SRM的作用非常重要。所制造机器的静态建模结果与实验值一致。