This paper presents the design and implementation 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. These devices use low-cost microcontrollers and digital signal processors and offer sophisticated control algorithms with highly flexible software, the ability to add user interface, reduce components, and introduce testing procedures with increase reliability. The PIC18FXX2 of Microchip is used for the implementation of inverter.

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