Use of matrix converter as slip power regulator in doubly-fed induction motor drive for improvement of power quality

Abstract

This paper reports the results of a simulation study of using a matrix converter (MC) to replace the line commutated cycloconverter as a static frequency changer in a slip power controller for induction motor speed control from power quality point of view. A slip power controller is required either to inject or to extract the slip power from the rotor of a doubly fed induction motor. Use of the matrix converter (MC) in place of the cycloconverter improves the drive performance by the generation of nearly sinusoidal injected voltage to the motor, sinusoidal input and output currents and adjustable input power factor for any loading condition. Simulation has been done in MATLAB program and results displayed for both sub- and super-synchronous speed of a laboratory motor