Improved Direct Torque Control of Induction Motor in MATLAB

Abstract

Induction motors based electric drives are dominated in many applications due to their superior characteristics over other drives including cost. An effect control method is required to reduce ripples in the torque. A direct torque control (DTC) is implemented by various scholars recently, however for further reduction of ripples in torque a modified DTC is implemented in this paper. The proposed method considerably alleviates the computational burden of control technique on chip. The selection of inverter switching vectors is identified for restricting the torque and flux errors within their respective hysteresis bands. Fastest responses of torque, speed and flux are achieved. This paper also includes the incorporation of modeling and designing of DTC with induction motor to enhance comprehension. Extensive results under various operating conditions are presented in this paper to enhance the importance of the improved DTC.

Keywords

• dtc
• induction motor
• svpwm
• torque ripple minimization
• modeling