High Power Density 1 MHz 3 kW 400 V-48 V LLC Converter for Datacenters with improved Core Loss and Termination Loss

Ahmed Nabih, R. Gadelrab, P. Prakash, Qiang Li, F. Lee
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引用次数: 22

Abstract

Power consumption of data centers is increasing rapidly over recent years. Recently, 48V power architecture has attracted more interest in data centers as it offers more efficient architecture. This paper focuses on the implementation of the DC-DC stage of the 3 kW power supply unit. Full-bridge regulated LLC converter is designed with a matrix of two transformers. This paper focuses on the magnetic design of the PCB-based transformer and resonant inductor of the LLC converter. The dimensional effects on core loss are discussed and evaluated. A matrix of two transformers implemented on UI core with rectangular core shape is proposed to minimize the eddy core loss of the transformer core. The termination of the secondary Full-bridge rectifier is also optimized to reduce the conduction loss of the transformer. A low-profile prototype of the designed converter is demonstrated with a peak efficiency of 98% and power density of 700W/in3.
高功率密度1 MHz 3 kW 400 V-48 V LLC转换器,用于改善核心损耗和终端损耗的数据中心
近年来,数据中心的功耗增长迅速。最近,48V电源架构因其提供更高效的架构而吸引了数据中心的更多兴趣。本文重点研究了3kw供电机组DC-DC级的实现。全桥稳压LLC变换器是由两个变压器组成的矩阵设计的。本文重点研究了基于pcb的变压器和LLC变换器谐振电感的磁学设计。讨论并评价了尺寸对铁芯损耗的影响。为了减小变压器铁心的涡流损耗,提出了一种采用矩形铁心形状的双变压器矩阵。二次全桥整流器的端接也进行了优化,以减少变压器的导通损耗。设计的转换器的低轮廓原型进行了演示,其峰值效率为98%,功率密度为700W/in3。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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