Investigation of Torque Ripple Behaviour for Five-Level Inverter-Fed Modified Model Predictive Torque Control-Based PMSM Drive

Abstract

This paper investigates the minimization of torque ripple in Permanent Magnet Synchronous Motor (PMSM) Drive using the Modified Model Predictive Torque Control (MMPTC) with multilevel inverters. The MMPTC grabs the good steady-state performance as of Model Predictive Current Control (MPCC) and provides direct torque control as in the Model Predictive Torque Control (MPTC). The MMPTC strategy also eliminates weighting factors in the cost function, unlike conventional Model Predictive Torque and Flux control (MPTFC). The torque ripple causes vibrations and noise and produces more heat loss in the drive, which leads to focus on the torque ripple reduction. Among the various torque ripple minimization approaches, the multilevel inverter configuration clutched more attention in electric drives due to rapid development in the semiconductor technology. Analysis of torque ripple behaviour of PMSM drive with MMPTC using two-level (2L), three-level (3L), and five-level (5L) inverters is carried out under different running conditions in MATLAB/SIMULINK software tools and also implemented in real-time with the help of dSPACE1104 controller.