This paper presents the idea and design of a three-phase inverter that produces a symmetric AC output voltage of desired magnitude and frequency. Although the inverter has traditionally been designed as analog circuitry, now the digital inverters are preferred. Microcontroller used for generating the control signal for the three-phase inverter. The importance of the proper design of control signals with powerful switching is to reduce the harmonics and power losses of the inverter output voltage. The potential of the microcontroller to carry out the mathematical and logical functions allows it to imitate logic and electronics circuit. The PIC18FXX2 of Microchip is used for the implementation of inverter. PWM control is the most powerful technique that offers a simple method for controlling of analog systems with the processor’s digital output. All PWM generating methods aim at generating a sinusoidal inverter output voltage without low-order harmonics. With the availability of low cost high performance microchips characterized by the execution of most instructions in one instruction cycle, complicated control algorithms can be executed with fast speed, making very high sampling rate possible for digitally-controlled inverters.
DOI: 10.17762/ijritcc2321-8169.150310
