Synchronous reluctance machine (SynRM) is reemerging as a thermally robust and inexpensive actuator solution mainly due to the lack of permanent magnet. Added to that, the possibilities of having different rotor topologies make it very versatile where further optimization is possible depending on the objective, be it cost, ease of fabrication, power output, or torque quality. In an application where the outer dimension of the motor is strictly limited, this paper compares quantitatively and qualitatively the torque ripple of three SynRM machines of the same stator dimension equipped with different rotor topologies: segmented, tooth and flux barrier. Using an experimentally validated FE model, the torque ripple and the ripple’s harmonic content are compared at maximum load (stator current, IS = 50 A) and load angle (β = π/4). The machine adopting the flux-barrier rotor was shown to have the best torque quality (41% ripple), followed by tooth rotor (78% ripple) and finally segmented rotor (105% ripple). The harmonic contents are also presented and analyzed.

中文翻译：

---

具有尺寸约束应用的不同转子拓扑结构同步磁阻电机的转矩脉动分析

同步磁阻电机 (SynRM) 正在重新成为一种耐热且价格低廉的致动器解决方案，这主要是由于缺少永磁体。除此之外，具有不同转子拓扑结构的可能性使其非常通用，可以根据目标进行进一步优化，无论是成本、制造难度、功率输出还是扭矩质量。在电机外部尺寸受到严格限制的应用中，本文定量和定性地比较了三种具有不同转子拓扑结构的相同定子尺寸的 SynRM 电机的转矩脉动：分段、齿和磁通屏障。使用经过实验验证的 FE 模型，在最大负载（定子电流，IS = 50 A）和负载角 (β = π/4) 下比较扭矩纹波和纹波的谐波含量。采用磁通屏障转子的电机被证明具有最佳的扭矩质量（纹波为 41%），其次是齿形转子（纹波为 78%），最后是分段转子（纹波为 105%）。还介绍和分析了谐波含量。