Design and optimization of high torque, low ripple switched reluctance motor with flux barrier for direct drive

Evolutionary computation based multi-objective pole shape optimization of switched reluctance machine

“…Unfortunately, in most of the cases, the minimization of the torque ripple implies degradation of other important features, such the mean torque. Therefore in most of the literature average torque and torque ripple are considered as performance measures while determining optimum pole arc [24,15]. However due consideration should be given to copper loss and available window area for winding as an increase in stator pole width increases copper loss and reduces the available window area for winding [18].…”

Rotor Shaping Method for Torque Ripple Mitigation in Variable Flux Reluctance Machines

“…In contrast, there are few existing pole shaping methods documented for machines with doubly-salient structures. Several attempts have been made to reduce the torque ripple in SRM by using relative eccentricity of the stator and rotor poles [20], rotor flux barriers [21], rotor notches [22], slant stator pole face [23] [24], skewed rotor poles [25]. All of these methods make the pole shapes geometrically asymmetric and are specific for the torque profiles of SRMs, which makes them difficult for application in VFRMs.…”

New rotor shape design of SRM to reduce the torque ripple and improve the output power

“…On the other hand, some papers have been published on the acoustic noise reduction [4]. The magnet shape design is mainly used the notch and the magnet barrier on rotor pole to reduce the torque ripple and acoustic noise [5] [6]. However, these designs have severe problems, such as decreasing average torque and increasing weight of the motor.…”