Three-Phase AC/DC PWM Converter with Sinusoidal AC Currents and Minimum Filter Requirements

A PWM control technique suitable for fully-controlled three-phase AC/DC converters is analyzed, which gives sinusoidal input currents and ideally smoothed DC voltage. The technique allows four-quadrant operation and full-range control of the input power factor. An extension to a simplified converter scheme, capable of one-quadrant operation, is also considered. Operation of. the converter is analyzed under both ideal and actual conditions. Control implementation and design criteria are discussed and experimental results are reported.