New Generation Three-Phase Rectifier

This paper describes an investigation into the development of a new generation of three-phase rectifier, used to power telecommunications equipment. Traditionally, the topology used is a single-phase two-stage design, with a boost converter at the input to the first stage and an isolated dc-dc converter making up the second stage. The boost converter provides power factor correction which is necessary in order to comply with the IEC1000-3-2 standard. The dc-dc stage provides isolation, as well as the fast feedback necessary to regulate the output voltage ripple. This is necessary in order to comply with the psophometric noise standard ITU-T0.41. A two-stage design however, results in a cascade effect contributing to the total power losses. A new rectifier is introduced that can satisfy the required telecommunication industry standards, whilst also having only a single-stage design. This paper discusses the principles of operation and the performance characteristics of the new generation three-phase rectifier.