Single-Phase AC-AC Current Source Converter with Improved Performance

Abstract

This paper proposes a single-phase AC-AC current source converter with improved current waveforms. The main circuit of the converter is a three-phase bridge circuit that contains a capacitor for the management of instantaneous power with twice the source frequency. Two types of pulse width modulated (PWM) switching patterns are employed to regulate the output power and to obtain the smoothing DC current. The circuit configuration and the PWM operation are demonstrated in the paper. The experiments prove that the converter has sinusoidal voltage and current in both the input and the output.