A novel 9 kW transformerless high frequency AC/DC to DC converter with isolation

A new power convertor topology called 'Phaser' is introduced. The attractive features of this topology are: elimination of the high frequency transformer; isolated output; high power density and therefore very light weight; high overall efficiency; and simpler design, and therefore smaller design cycle. The paper presents the design, simulation implementation and experimental results for a 9 kW output constant current plasma metal cutter based on this topology. Because of the elimination of the high frequency transformer, the design cycle reduces substantially. Also, there is a reduction in the component count. The topology is able to achieve at least twice the power density compared to existing power converter designs.