Modulation and Control of a Three-Phase Phase-Modular Isolated Matrix-Type PFC Rectifier

Three-phase phase-modular isolated power factor correction rectifiers are an interesting alternative to phase-integrated three-phase rectifiers as matrix-type phase modules allow a single-stage isolated energy conversion between the three-phase mains and a dc bus. Therefore, this paper presents a phase-modular isolated matrix-type rectifier which can be connected to the mains either in star (Y) or delta ( \Delta) configuration, enabling a wide input voltage range. Additionally this allows to select the voltage and current stresses of the phase module switches according to the used semiconductor technology, for example {\text{650 V}} Si or GaN devices could be used in rectifiers powered from the {400} or {\text{480 V}}_{\text{rms}} mains. A detailed analysis of the operating principles and switching behavior of the converter is presented, showing that zero voltage switching can be achieved in the phase modules. Additionally a third harmonic current injection concept is proposed which allows an up to {15} \% higher output voltage in \Delta -mode. The concepts are validated with measurements taken on a {\text{7.5}}\;{\text{kW}}, {\text{400}}\;{\text{V}} dc output voltage prototype converter achieving {97.2} \% efficiency and a total harmonic distortion of < {2} \% at rated power.