99.3% Efficient Three-Phase Buck-Type All-SiC SWISS Rectifier for DC Distribution Systems
99.3% Efficient Three-Phase Buck-Type All-SiC SWISS Rectifier for DC Distribution Systems
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DOI：
10.1109/tpel.2018.2817074
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发表时间：
2019-01
影响因子：
6.7
通讯作者：
L. Schrittwieser;M. Leibl;M. Haider;F. Thöny;J. Kolar;T. Soeiro
中科院分区：
文献类型：
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作者：
L. Schrittwieser;M. Leibl;M. Haider;F. Thöny;J. Kolar;T. Soeiro
与交流系统相比，用于数据中心、工业应用和住宅区的直流配电系统被期望提供更高的效率、更高的可靠性和更低的成本，并且近年来一直是重要的研究课题。在这些应用中，通常需要一个高效的功率因数校正（PFC）整流器，从传统的三相交流电源向直流配电总线供电。本文分析了三相降压型单位功率因数SWISS整流器，用于实现具有400 V rms线对线交流输入电压和400 V直流输出电压的超高效率PFC整流级。结果表明，通过交错布置两个变换器输出级，整流器的电网电流总谐波失真可以得到显著改善。此外，直流输出滤波器采用电流补偿型集成共模耦合电感实现，可确保交错半桥之间的电流分配相等，并提供共模电磁干扰（EMI）滤波电感。在对耦合电感的磁特性进行理论分析的基础上，讨论了选择半导体、磁芯、匝数和EMI滤波器所需的公式和设计步骤。基于这些结果，超高效率的8-kW 4-kW $\cdot$dm $^{-3}$（66-W$\cdot$ in$^{-3}$）实验室规模的原型转换器使用1.2-kV SiC MOSFET的设计。对样机进行的测量确认了$\text{{99.16}{\%}}$的全功率效率和$\text{{99.26}{\%，}}$的峰值效率，并符合CISPR 11 B类传导发射限值。
DC power distribution systems for data centers, industrial applications, and residential areas are expected to provide higher efficiency, higher reliability, and lower cost compared to ac systems and have been an important research topic in recent years. In these applications, an efficient power factor correction (PFC) rectifier, supplying the dc distribution bus from the conventional three-phase ac mains, is typically required. This paper analyzes the three-phase, buck-type, unity power factor SWISS Rectifier for the realization of an ultrahigh-efficiency PFC rectifier stage with a 400-V rms line-to-line ac input voltage and a 400-V dc output voltage. It is shown that the mains current total harmonic distortion of the rectifier can be improved significantly by interleaving two converter output stages. Furthermore, the dc output filter is implemented using a current-compensated integrated common-mode coupled inductor, which ensures equal current sharing between the interleaved half bridges and provides common-mode electromagnetic interference (EMI) filter inductance. Based on a theoretical analysis of the coupled inductor's magnetic properties, the necessary equations and the design procedure for selecting semiconductors, magnetic cores, the number of turns, and the EMI filter are discussed. Based on these results, an ultrahigh-efficient 8-kW 4-kW $\cdot$dm $^{-3}$ (66-W$\cdot$ in$^{-3}$) laboratory-scale prototype converter using 1.2-kV SiC MOSFETs is designed. Measurements taken on the prototype confirm a full power efficiency of $\text{{99.16}{\%}}$ and a peak efficiency of $\text{{99.26}{\%,}}$ as well as the compliance to CISPR 11 Class B conducted emission limits.