Investigation of electromagnetic performance of salient-pole synchronous reluctance machines having different concentrated winding connections

This paper presents a comparative study of the electromagnetic performance of 6-stator/4-rotor pole switched reluctance (SR) machines having AC sinusoidal bipolar excitation which is equivalent to salient-pole synchronous reluctance (SynR) machines having different non-overlapping concentrated winding connections, i.e. asymmetric, symmetrical and hybrid. The output torque of such machines is mainly generated by the self and mutual inductances, which are principally highlighted in this paper. In addition, the average value and quality of output torque and phase and line voltage waveforms are also predicted and compared. During the investigations the influence of the magnetic saturation on the machine performances is particularly examined. In order to confirm and verify the predicted results, a prototype is constructed and tested under the three different winding connections.