Predictive Torque Control of Three-Phase Induction Motor Drive With Inverter Switch Fault-Tolerance Capabilities

This article presents a predictive torque control (PTC) for a three-phase induction motor drive with inverter switch fault-tolerance to obtain the performance of a drive in postfault operation as that of normal operation. This proposed topology operates the drive in rated capacity and also eliminates the dc-link voltage balance issue in the postfault operation. The front end of two-level voltage source inverter for enhancement of dc voltage to meet the requirement of inverter during healthy and reconfiguration a conventional boost converter is used. The boost converter is controlled by the current control technique and modified PTC to the induction motor. The proposed converter retains all the advantages of the conventional converter by using less number of passive components and suitable for low- and medium-power applications. The results are presented based on simulation and experimental to compare with fault-tolerant converter topologies available in the literature to highlight the merits of the proposed topology. Furthermore, operation of the drive is observed in the field weakening region, and results are found to be satisfactory.