Study of Speed Tracking of a PWM Inverter Based Induction Motor Drive

An induction motor drive based on inverter regulates its speed of rotation wherein the inverter plays an instrumental role. In an inverter based induction motor drive, the supply voltage and frequency is varied for controlling the motor's speed. In this drive, the inverter performs the conversion of fixed dc voltage to ac voltage having variable frequency. It also contains a speed sensor for measuring the speed to be controlled. The motor's speed is determined by the frequency, and the torque is determined by the voltage of ac output of the inverter. In the present research work, a PWM inverter based 3 phase squirrel cage induction motor drive is simulated in MATLAB, and its speed setpoint response is examined.