Improving the Speed Control of the Induction Motor Using Pulse Width Modulation Technique

In this research, the improvement of the speed control of the induction motor using the pulse width modulation (PWM) technique was carried out. The induction motor is subjected to characterization to evaluate its essential parameters of functionality. The speed characterization of the induction motor was obtained by the application of the phase angle control method under the two operating conditions. The induction motor was operated at a setpoint speed 2830RPM and rated with torque 10Nm. In the second part, the induction motor was operated at 50% of rated torque (5Nm) and a speed setpoint of 50% of the rated speed (1415 RPM). It was observed that the torque obtained is inversely proportional to the speed. At about 0.15 seconds the speed rose to a maximum of 3152.9RPM, which represents an overshoot of about 10.24% with a settling time of 0.3 7sec. While the setpoints speed at 50% of the rated speed and loaded mark with 50% of the rated torque, it took the induction motor a long time to match the speed setpoint. The settling time is about 0.44sec while the overshoot recorded is about 26.60%. Due to faster settling time and favourable overshoot obtained by the induction motor in the study, the speed response characteristics exhibited higher efficient operation and better energy utilization