Design of a microcontroller-based programmable voltage source inverter.

A voltage source inverter (VSI) is commonly used in converting DC to AC systems with the constant voltage source input. However, a microcontroller is mostly used in generating the signal to the VSI due to low harmonics output. This paper has built a microcontroller-based VSI with an ATMega 238 microcontroller controller to generate a Sinusoidal Pulse Width Modulation (SPWM). The performance test was done in a set of 40, 50, and 60Hz frequencies. The test results show that the VSI frequency output can meet the frequency setpoint with a total harmonics distortion (THD) of 0.22%, 0.46%, and 12.46% of each frequency settings. [ABSTRACT FROM AUTHOR]