Z-source high frequency AC/DC push-pull converter with high input power factor

To maintain high efficiency and high power density increased switching frequency is the primary path. The push-pull converter used as ac-dc converter is very suitable for low and medium power application. High efficiency, low switching loss and high power density are the predominance of this application. Increased switching frequency gives high power density, reduces size of components and this give simplicity of the circuit. Main aim of proposed topology is to obtain isolated dc voltage from ac voltage input with reduced switching losses and high input power factor. This topology uses push-pull converter with z-source to improve input power factor and 50 KHz switching frequency with ferrite core transformer to obtain high power density. This converter topology is suitable for obtaining low voltage, high current source from a high voltage, low current AC source. This would find application in high current battery bank charging, heating of the bearings, led lightings and charging of super capacitors and electrolysis with high current.