AC induction motor speed stabilization technique based on amplitude control

Abstract

The frequency converter supplied AC induction motor speed stabiliz ation technique using motor slip control based on the variation of motor supply voltage amplitude has been proposed. The amplitude of voltage is varied in real time in such a way that for any motor load the motor slip would be constant. The proposed technique ensures lower motor phase steady state current and motor slip as compared to the case w hen conventional scalar control is used. The developed technique has been investigated experimentally. The obtain ed results were compared to results gained using conventional scalar control technique.