Selection of Rotor Geometry to Minimize the Contribution of Stator Slot Harmonics to the Torque Ripple of a SynRM Motor

This article discusses the process of determining the shape and size of flux barriers in the rotor of a SynRM motor. This approach aims to reduce the contribution of stator slot harmonics to torque ripple. The research object was a low-power motor with compact geometric dimensions, in which the previously used salient-pole rotor was modified. The study investigated the influence of the stator lamination form on the generation of higher torque harmonics, as well as the contribution of induced stator slot harmonics. The whole investigation found that by properly selecting the shape and size of the flux barriers, stator slot harmonics’ contribution to torque ripple may be significantly reduced.