Detailed analysis and design of a three-phase phase-modular isolated matrix-type PFC rectifier

Abstract

Phase-modular isolated PFC rectifiers are an interesting alternative to phase-integrated three-phase rectifiers. The use of a matrix-type converter allows to achieve isolation with a single-stage energy conversion. This paper presents a phase-modular isolated matrix-type rectifier, which can be connected to the mains either in star (Y) or delta (Δ), enabling a wide input voltage range. A detailed analysis of the operating principles and switching behavior of the converter is presented. Then, the design of the active and passive components is discussed considering a 7.5kW, 400V output voltage system. Different implementation alternatives are evaluated regarding efficiency and realization effort.