A Novel Space Vector Modulation Strategy for Direct Torque Control of Induction Motors

Abstract

A novel Direct Torque Control (DTC) scheme for an induction motor drive system is proposed in this paper. This method is based on direct load angle control to determine needed stator voltage vector for compensation of electromagnetic torque and stator flux error by means of new modified Space Vector Modulation (SVM) inverter controller. Objectives of motor drive control, fixed switching frequency, low torque, and stator flux ripple, consequently low current distortion and simplicity in implementation are achieved using new modified SVM strategy. Matlab / Simulink simulation verifies the capacity of the proposed motor drive to evaluate potentials such as improvement in torque and stator flux ripple, low stator current harmonic contents during full load and one step speed reference.