A Single-phase PWM Current Source Converter Coupled in Parallel with AC Chopper

Abstract

This paper presents a novel single-phase current source converter coupling with ac chopper, which is connected in parallel to main bridge. Two switching devices are used in common for main bridge and ac chopper circuits. This paper gives the circuit configuration, the operational principle and a PWM method. The calculated result proves that the proposed converter allows the dc reactor to be greatly reduced and has the smoothing dc current and the sinusoidal ac current.