Four Quadrant Operation of Direct Torque Control-SVPWM based three phase Induction Motor Drive in MATLAB/SIMULINK environment

This paper deals with Four Quadrant Operation of Direct Torque Control (DTC) - Space Vector Pulse Width Modulation (SVPWM) based 3-phase Induction Motor Drive using MATLAB and its toolbox SIMULINK. The Classical Direct Torque Control of VSI fed Induction Motor is implemented with the help of Hysteresis Band (HB) controllers (one for flux control and other for torque control), a voltage source inverter and a switching table. Classical DTC has the disadvantages like variable & high switching frequency and high torque and current ripples in steady state. To overcome these difficulties SVPWM is employed in the proposed model. With aid of the developed model, the steady and transient-state characteristics of current, speed and torque of three phase induction motor can be effectively examined and analyzed. This proposed model can be projected as a trouble-free design tool for the development of three phase induction motor drives.