Fuzzy-Logic Speed Controller for 3-Level Open-End Winding Induction Motor Drive with Predictive Torque Control Technique

Abstract

Induction motor (IM) drive with open ended stator windings achieves multilevel inversion as an integral part of the load. The open ended configuration is fed with two 2-level voltage source inverters on both sides. The 3-level multilevel inversion with open-ended configuration is achieved by maintaining equal DC-link voltages on both sides of the inverters. The advanced control strategy like predictive torque control (PTC) technique with PI controller was suggested in the literature to regulate the motor speed and to improve the open-end winding IM (OEW-IM) drive performance. In case of conventional PI-controller, the PI parameter tuning is needed. This paper presents a fuzzy-logic speed controller (FLSC) for 3-level OEW-IM drive with PTC technique. The FLSC is used to control the speed of OEW-IM. The simulation results are carried out on a 4-kW OEW-IM. The simulation results reveals that, the FLSC improves the drive performance when compared to the PI-controller.