Inverters are used in a large number of power applications. The function of an inverter is to convert DC power to AC, these are referred to as Voltage Source Inverters (VSI). VSI are divided up into three categories: Pulse-width Modulated Inverters, Square-wave Inverters, and Single-phase Inverters with Voltage Cancellation. This paper will talk about the different types of Inverters and how they work. It will continue on with examples of some types of inverters and what types of factors affect their efficiencies. Our project is based on the design of PWM Inverter and PI Controlled PWM Inverter for the performance analysis and comparison of the techniques for best DC-ac conversion scheme evaluation. Our proposed scheme has been designed in MATLAB/SIMULINK environment showing performance measures.