A Review of Single-Phase Single-Stage DC/AC Boost Inverter Topologies and Their Controllers

A classical voltage source inverter (VSI) generates an ac voltage that is lower than the DC input voltage. A boost inverter is different from a VSI in the sense that it can generate an ac voltage whose peak can be either higher or lower compared to that of the DC input voltage. Although two-stage boost inverters are very common, there has been a growing interest in single-stage boost inverters. This review focuses on single-phase, single-stage boost inverters where a load is connected differentially between two boost converters to produce a sinusoidal wave. The main drawback of this type of inverter lies in its control algorithm since the controller has to deal with a variable-operating point condition. Considering this issue, different kinds of controllers have been proposed in many works. This work also presents a review of those controller algorithms. Finally, it is concluded that due to the bilinear nature of the boost inverter an accurate small-signal model of the boost inverter is still a work in progress.