An Optimized Alternative Fixed Switching 12-Sector Space Vector Pulse Width Modulation Control of Open-End Winding PMSM Drive

Over the past few years, there has been an increase in the use of open-end winding (OEW) PMSM applications. The fault tolerance of the topology makes OEW PMSM suitable for various intermittent operations. However, a dual inverter operation causes OEW PMSM drive schemes to exhibit high commutation and ripple. This paper presents an optimized alternative fixed switching 12-sector space vector pulse width modulation (svpwm) control for open-end winding PMSM drives. This work reduces the commutation number without compromising drive system performance. In comparison with conventional 6-sector svpwm, this control scheme offers three advantages. It incorporates optimal signal generation, a virtual state method for segmenting sectors into small sectors, and alternative fixed switching methods based on sub-hexagons. Inverters are assigned fixed voltage states based on sub-hexagon numbers. The proposed scheme was validated in the Matlab2021b Simulink environment. Based on the simulation results, it is found that the proposed scheme is effective for OEW PMSM. Finally, OPAL-RT (OP4500) is used to verify scheme effectiveness. The verification of the proposed scheme indicates its effectiveness. Results obtained from real-time hardware have ripple of 1.25% and 5% for speed and torque performance, respectively.