Design and Implementation of SVPWM Inverter to Reduce Total Harmonic Distortion (THD) on Three Phase Induction Motor Speed Regulation Using Constant V/F

摘要

The electric motor has replaced motor fuel as the main mover of the equipment. One of them is the use of a three-phase induction motor in the industrial sector. Equipment in an industry requires many speed controllers in operation. The induction motor speed can be changed by changing the number of poles, changing the stator voltage, and changing the frequency source. This method has many disadvantages, such as changes in motor dimensions and the occurrence of flux saturation. This paper provides method of controlling the speed of a three-phase induction motor with constant V/f. Speed regulation with constant V/f can prevent saturation flux when changing the input frequency and can maintain maximum motor torque along the speed regulation area. The speed regulation use an inverter Three-phase SVPWM by implementing PI control. The results of using constant V/f control show that motor speed response at 1300 rpm has a rise time of 0.13 second, a settling time of 0.164 second, an overshoot of 0%, and a THD of 19.26%.