Because it provides various benefits and is a reliable technology to convert electrical energy into mechanical motion, induction motors are becoming more widely employed in a variety of industrial and commercial applications. Controlling the speed of an induction motor is desirable in several applications. Because of the physics of the induction motor, varying the frequency of the AC voltage driving the motor is the preferred technique of adjusting its speed. In recent years, it has been possible to use a microprocessor integrated into an appliance to provide variable frequency AC power to control the speed of an induction motor.

The variable frequency power inverter based on a microcontroller is the subject of this research. The microprocessor sends a variable frequency pulse width modulation (PWM) signal to the gate drive, which controls the applied voltage and produces the needed PWM frequency with fewer harmonics at the power inverter's output.

The completely controlled bridge voltage source inverter was built using semiconductor power devices isolated gate bipolar transistors (IGBTs), and the PWM approach was used to supply the motor with AC voltage.

Matlab/Simulink is used to simulate the proposed driving system for three and single phase power inverters. Different SPWM were used to get the Matlab Simulation Results for the proposed system. As a result, a stable variable frequency inverter with a large frequency range has been obtained, and a good agreement between the simulation and hardware of a microcontroller-based single phase inverter has been discovered.