• Title/Summary/Keyword: Rack-level DC power supply

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Rack-Level DC Power Solution for Volume Servers

  • Kwon, Won-Ok;Seo, Hae-Moon;Choi, Pyung
    • ETRI Journal
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    • v.32 no.6
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    • pp.940-949
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    • 2010
  • 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.

Highly Power-Efficient Rack-Level DC Power Architecture Combined with Node-Level DC UPS

  • Kwon, Won-Ok;Seo, Hae-Moon;Choi, Pyung
    • ETRI Journal
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    • v.33 no.4
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    • pp.648-651
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    • 2011
  • This letter presents a highly efficient rack-level DC power architecture combined with a node-level DC uninterruptible power supply (UPS). The proposed system can provide almost the equivalent power efficiency of a high-voltage DC data center without any change in the existing power infrastructure. The node-level DC UPS combined with a power distribution board provides high power efficiency as well as lower UPS installation costs. Implemented on a rack, the entire power system can be monitored through a network.

A Method of Rack Level Power Supply to Save Data Center Energy (데이터센터 에너지 절감을 위한 랙 수준 전력 공급 방법)

  • Cho, Soohyung;Kim, Daehwan
    • Proceedings of the Korea Information Processing Society Conference
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    • 2018.10a
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    • pp.11-12
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    • 2018
  • 대부분의 컴퓨팅 장비들은 교류 전력을 공급받지만 실제 직류로 동작하기 때문에 교류를 직류로 변환하는 전원 공급장치가 필수적이다. 문제는 이과정에서 손실 발생하기 때문에 이를 최소한으로 줄이는 방법이 필요한데 이를 위해 본 논문은 OCP에서 제안한 방법대로 랙 수준의 전원 공급 장치와 DC 서버의 전력 공급 연력 방법에 대해 설계하였으며 이렇게 구성하였을 경우 어떻게 에너지 절감량을 측정할 수 있는가에 대해 설명하였다. 이 방법대로 상용 데이터 센터에 실제 도입이 이루어진다면 데이터 센터 산업이 소모하는 에너지 사용량을 줄이는데 기여할 수 있을 것이다.