Implementation of vector controlled induction motor drive using microcontroller

Abstract

An indirect vector controller suitable for induction motor is investigated and implemented using the Intel 80C196MC processor. The control system generates sinusoidal waveforms using Pulse Width Modulation (PWM). This PWM signal is obtained from the vector controller based on information from sensors, such as three phase currents from hall sensors, and one rotor speed from an optical encoder. The controller is operated in response to the speed references, which include step speed reference commands at the starting, and reversal speed reference commands at the running. The speed commands are set up to run the induction motor in both the flux constant and weakening areas. The vector controller uses the rotor flux as constant flux reference, which is determined by the motor parameters obtained from the motor test. Experimental results are presented to show high performance of this vector controller drive suitable.