Speed control of induction motor drive using universal controller

When connected to main power supply, induction motors run at their rated speed, however there are many applications where variable speed operations are required. Although a range of induction motor control techniques are available, generating variable frequency supply is a popular control technique, having a constant voltage to frequency ratio in order to attain constant (maximum) torque throughout the operating period. This control technique is called as variable frequency control. The main aim of this honours degree project paper emphasizes on the development of a general purpose universal board that is capable of controlling the speed of single or three phase induction motor with minor software and hardware modifications. The absolute system consists of the control, driver and the power circuits. The control circuit includes the power supply circuit and the microcontroller. The power circuit includes the full-bridge single-phase Pulse Width Modulation inverter. Simulation was done using MATLAB Simulink software. The system was implemented, tested and the experimental results are examined and discussed.