This document discusses different types of inverters. It describes inverters as static power converters that produce an AC output from a DC power supply and are used in applications like adjustable AC drives, UPS systems, and active power filters. The two main types are voltage source inverters (VSI) and current source inverters (CSI), depending on whether the input is a voltage source or current source, respectively. VSIs can control output voltage while CSIs directly control output current. Half bridge and full bridge are two common single-phase VSI configurations, with the full bridge having four operating states based on switch positions. Three-phase inverters are made up of three single-phase inverters connected to