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http://dx.doi.org/10.4218/etrij.10.1510.0060

Rack-Level DC Power Solution for Volume Servers  

Kwon, Won-Ok (Software Research Laboratory, ETRI)
Seo, Hae-Moon (Department of Electrical Engineering, Kyungpook National University, Realistic Media Platform Research Center, KETI)
Choi, Pyung (Department of Electrical Engineering, Kyungpook National University)
Publication Information
ETRI Journal / v.32, no.6, 2010 , pp. 940-949 More about this Journal
Abstract
Rack-level DC power supply is the optimal technology for providing DC power to a volume server without any power infrastructure changes in an existing AC data center. In this paper, we propose a smartly controllable and monitorable DC rack power system. The proposed system improves power efficiency by changing the power distribution architecture of a conventional method in the rack. We developed an optimal power control method in multipower modules to provide high efficiency at low loads. In addition, the proposed system provides real-time web monitoring of the rack power and environment around a rack. In our experiments, the proposed system improved the power efficiency by over 10% compared to an AC power system providing N+1 redundant power and power monitoring.
Keywords
Rack-level DC power supply; power monitoring; power distribution;
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