INVESTIGATION ON THE FLUX-BASED TORQUE-RIPPLE BEHAVIOR IN DTC BASED INDUCTION MOTOR DRIVES

Document Type: Regular Paper

Authors

Electrical Engineering Department, Sharif University of Technology, Tehran, I. R. of Iran

Abstract

The efficiency of induction motors decreases at light loads. Efficiency optimizer control systems
adjust the motor flux value to achieve the best efficiency in a wide range of load variations. Reduced flux
operation has some other benefits such as power factor improvement and torque ripple reduction. The latter is
an important issue in a direct torque controlled induction motor drive. In this paper, the effect of flux
reference value on the torque ripple of a direct torque controlled induction motor is analyzed. The effect of
flux value on torque ripple in a wide range of speed variations is investigated. Simulation and the
experimental results presented justify the validity of the theoretical analysis about torque ripple.

Keywords