Speed Performance of a Modular Stator, Segmented Rotor Switched Reluctance Motor

The switched reluctance motor (SRM) is an inherently fault tolerant machine due to the absence of permanent magnets in its construction and the wiring independence of its phases. Modifications to the conventional SRM structure have been proposed to improve its utility. In this research we investigate the no-load rotor speed performance of a modular stator, segmented rotor SRM (MSSR-SRM) design. Two drive control methods are tested to determine their effect on its no-load performance. First, an open loop position-based commutation strategy is used to determine the effect of varying the turn-on duration and current excitation on the no-load rotor speed. The resulting maximum rotor speeds are recorded, and a maximum of approximately 660 RPM is observed. Second, PID control is used for closed-loop control, to determine its applicability for the MSSR-SRM design. With the turn-on duration fixed, it was able to reach target speeds between 250 and 600 RPM.