Implementation of Variable Structure of a Dual-Mode Switched Reluctance Motor by Using Asymmetric Half-Bridge Topology

This paper investigate a 12/10-pole Switched Reluctance Motor (SRM) which can be used as a six-phase or three-phase machine by altering the winding connection. The parameter relationship including resistance, inductance, phase current and torque between two operation modes is deduced and analyzed. A connection method between the machine and power converter based on three-phase asymmetrical half bridge (AHB) structure and the corresponding control strategy are proposed to carry out dual-mode operation. The inductance and torque characteristics of six-phase and three-phase operation are comparatively analyzed, and then the steady-state performances and mode-changing simulation are also performed. Finally, an experimental setup is developed and the independent steady-state operation and mode-changing experiment are implemented. Both the simulations and experiments validate the proposed mode-changing scheme.