Effect of modified pole shapes on the peformance of hybrid switched reluctance motor
saranya venkatasubramanian Balaji
electrical machines and drives
Hybrid Switched Reluctance Motor (HSRM) has the advantage of improved power and efficiency than its Switched Reluctance Motor (SRM) counterpart. The presence of permanent magnet and auxiliary winding in the stator yoke increases the torque density in HSRM when compared to SRM. However cogging torque and torque ripple is still a major problem in HSRM which causes unwanted acoustic noise and vibration. This work emphasis on minimization of unwanted torque ripple and cogging torque by altering the stator and rotor pole geometry. This paper presents a study on torque ripple and cogging torque minimization in HSRM with altered pole shapes such as tapered stator, rotor pole shoe and stator pole face with non-uniform air gap. This paper also analyzes the influence of geometrical parameters that modifies the pole face shapes on the performance of HSRM. Based on the analysis an optimum design is proposed to reduce the torque ripple and cogging torque in HSRM.
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