An Effective Predictive Torque Control Technique for Open-end Winding Permanent Magnet Synchronous Motor Drives with Reduced Ripples for EVs

Abstract

Permanent Magnet Synchronous motors (PMSM) are commonly used in the applications of Electric Vehicles (EVs). Predictive torque control (PTC) is the method which is popularly used for the control of PMSM. Generally, a PMSM is fed with a two-level inverter for the above operation. But, PMSM fed with multi-level inverter will give better performance. To achieve this configuration, Open-End Winding PMSM (OEW-PMSM) is used which is fed by a dual inverter. OEW-PMSM with three level inversion will comparatively produce less torque ripples and flux ripples. In PTC, cost function is the absolute function of torque and flux errors. Since torque and flux are two different quantities, a weighting factor place an important role in the PTC. The proposed PTC reduces the torque ripples by introducing a new method of utilizing cost function to eliminate weighting factors. Simulation studies are performed with dual-inverter fed OEW-PMSM with conventional and proposed PTC with three level inversion. The effectiveness of the proposed method is verified by comparing conventional PTC with proposed PTC.