A new family of single stage AC/DC power factor correction converters with fast output voltage regulation

Abstract

Off line converters should be designed to drain almost sinusoidal current from the utility to accomplish international regulations about harmonic injection. A common approach is to use power factor pre-regulators, that is usually, cascaded by a DC/DC converter to obtain a fast regulated output voltage in the load or DC bus. There are also several single stage solutions that make these two tasks using one single converter, obtaining advantages from the point of view of efficiency, size or cost. In this paper, a new family of single stage AC/DC circuits is proposed. With these converters, a high power factor and a tight regulated output voltage are achieved. This family has advantages such as efficiency and size over the two stage structure, and simplicity over other single stage solutions.