A comparative study of switched reluctance motors with conventional and toroidal windings

This paper deals with a comparative study of switched reluctance motors (SRMs) with conventional and toroidal windings, which is called CSRM and TSRM, respectively. In the CSRM there is a complete magnetic decoupling between phases, so that torque is produced entirely due to the rate of change of winding self inductance. If the same machine is wound with toroidal windings then it can be shown that a new configuration produces torque as a result of changing phase inductance, which becomes much smaller due to mutual inductance between phases. This difference of inductance makes the two SRMs have quite different characteristics. Consequently, the CSRM is proper for high voltage and small current and the TSRM is for low voltage and large current. The characteristics comparison is theoretically performed with respect of torque, current, output power, and efficiency according to speed variation