Space Vector Pulse Width Modulated Voltage Source Inverter Fed Induction Motor Drive using Fuzzy Logic Controller

Abstract

Direct self-controlled (DSC) induction motor drive employs sequence switching of space voltage vectors to pulse width modulated inverter. It has sluggish response during start up. The trajectory of stator flux and current is not a smooth circle. A novel fuzzy logic controller (FLC) based space vector pulse width modulated inverter fed induction motor drive is proposed in this paper. Here, FLC is used to select space voltage vectors for the PWM period based on torque error, stator flux error and stator flux position. The trajectory pattern of the stator flux vector, in a field co-ordinate system, can be improved by FLC. The machine's dynamic performance during starting is also improved by this method. The simulation results of the proposed scheme are presented in this paper.