Increased Voltage Stability with an Inverting and Non-Inverting Dual Buck AC-AC Converter

Abstract

An inverting and non-inverting buck-boost ac-ac converter is presented. Voltage sag may be corrected with the non-inverting operation, and voltage swell with the inverting operation. So, the suggested converter can restore voltage throughout a broad range, adjusting for both drops and increases. Since the fundamental switching cell is a unidirectional buck circuit, there is no danger of shoot-through. It accomplishes secure commutation without the need for RC snubbers or other forms of soft commutation. Additionally, it may be implemented using power MOSFETs without the body diodes conducting, and external diodes with strong reverse recovery characteristics can be utilized for current freewheeling to reduce reverse recovery concerns and associated losses.