Performance Comparison of an In-Wheel Switched Reluctance Motor for Different Winding Configurations


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Abstract


This paper presents a comparison study of torque profiles of an in-wheel switched reluctance motor (SRM) with different winding configurations. Studied outer rotor SRM was designed for an in-wheel electric vehicle (EV) application, by authors. Both of the short pitched and fully pitched winding configurations are developed and analyzed. Torque profiles and ripple ratios, which are the most important parameters of in-wheel propulsion motors in EV applications, are compared for different current values, which correspond to various driving conditions of an EV. It is observed that, in short pitched wound in-wheel SRM, ripple ratio is calculated as 32,76%, similar to the conventional SRMs. With fully pitched winding configuration, torque output is increased between about 23% and 52%, depending on the current level. On the other hand, torque ripple is also greatly increased in the common operation interval of the propulsion motor, in spite of the decrease at low currents. Increasing ripple ratio makes this winding configuration inconvenient for in-wheel propulsion applications, unless any ripple control algorithm is applied.
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Keywords


Fully Pitched Winding; In-Wheel Motor; Ripple Ratio; Short Pitched Winding; Switched Reluctance Motor; Torque

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References


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