MASTER SLAVE SPEED CONTROL SYSTEM INDUCTION MOTORS

Abstract

Nowadays, several applications ask for some kind of synchronization between the different motors. Example because of the large output power required for the long production line, conveyor line or assembly line in the industrial producing process, a single motor can't achieve the required output torque. So in this situation, two or more motors are necessarily applied to complete the control tasks synchronously and coordinately. The principle, on which this control scheme is based, is called the master slave motors control. The master motor is the reference motor to which one or more slave motors are synchronized. Its main characteristic is that the revolving speed output of the master motor will be the reference value of the slave motor. Any input signal or disturbance on the master motor can be reflected and followed by the slave motor. The main objective of this research is to develop a mean of synchronizing two induction motors based on master-slave strategy, by designing a speed control system for the two induction motors. Mathematical model for the induction motor has been derived and tested using simulink in open-loop direct start-up mode, also a simulink model for PWM inverter.Vector control technique use PI controller has been used for both the master and slave motors.The simulation results obtained using simulink showed a better tracking performance with acceptable tracking error.