دانلود رایگان مقاله Paralleled Three-Phase Current-Source Rectifiers for High-Efficiency Power Supply Applications

دانلود رایگان مقاله Paralleled Three-Phase Current-Source Rectifiers for High-Efficiency Power Supply Applications

MAY/JUNE 2015

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS

Paralleled Three-Phase Current-Source Rectifiers for High-Efficiency Power Supply Applications

 

Abstract

This paper presents the paralleling operation of three-phase current-source rectifiers (CSRs) as the front-end power conversion stage of data center power supply systems based on 400-Vdc power delivery architecture, which has been proven to have higher efficiency than traditional ac architectures. A control algorithm of paralleled three-phase CSRs is introduced to achieve balanced outputs and individual rectifier module hot swap, which are required by power supply systems. By using silicon carbide (SiC) power semiconductors, SiC MOSFETs, and Schottky diodes, the power losses of the front-end stage are reduced, and the power supply system efficiency can be further increased. The prototype of a 19-kW front-end rectifier to convert 480 Vac,rms to 400 Vdc, based on three paralleled three-phase CSRs, is developed. Each CSR is an all-SiC converter and designed for high efficiency, and the front-end stage full-load efficiency is greater than 98% from experimental tests. The balanced outputs and individual converter hot swap are realized in the hardware prototype too.

Index Terms—Data center power supply, high efficiency, paralleled current-source rectifiers (CSRs), silicon carbide (SiC).

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