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Title:A series-stacked architecture with isolated server-to-bus converters for high-efficiency data center power delivery
Author(s):Zhang, Yizhe
Advisor(s):Pilawa-Podgurski, Robert
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Power electronics
Data center
Power delivery architecture
Differential power processing (DPP)
Direct current to direct current (DC-DC) conversion
Abstract:Series-stacked server power delivery architectures have been proposed recently that can achieve much higher energy efficiency than conventional power delivery architectures. When servers are connected in series, differential power processing (DPP) converters can be used to regulate the server voltages when the servers are consuming different amounts of current. Server-to-bus DPP architecture has unique advantages among several other DPP architectures such as being able to achieve the minimum power processed in the DPP converters, and having a higher reliability than other DPP architectures. This work presents the development of a server-to-bus DPP architecture for server power delivery. The hardware prototype is built with four 4-to-1 isolated DPP converters with GaN switches. Four 12V 120W Dell servers are used in the bench test to validate the operation of server-to-bus DPP. 98.99% efficiency is achieved while the servers are running a real-life data center computational load.
Issue Date:2017-07-21
Rights Information:Copyright 2017 Yizhe Zhang
Date Available in IDEALS:2017-09-29
Date Deposited:2017-08

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