High Speed Soft-Start DC-DC Converter for Energy Management in Data Center

Conference: Intelec 2013 - 35th International Telecommunications Energy Conference, SMART POWER AND EFFICIENCY
10/13/2013 - 10/17/2013 at Hamburg, Deutschland

Proceedings: Intelec 2013

Pages: 5Language: englishTyp: PDF

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Authors:
Kurokawa, Fujio; Sagara, Suguru; Maruta, Hidenori; Shibata, Yuichiro (Nagasaki University, Nagasaki, Japan)
Tanaka, Toru; Hirose, Keiichi (NTT Facilities, Tokyo, Japan)

Abstract:
This paper presents a high speed soft-start dc-dc converter for energy management in the data center. The proposed con-trol method is constructed as the digital current-mode control dc-dc converter used in the higher voltage direct current (380V HVDC) system. In this system, power supplies are connected in parallel to obtain more high efficiency, safety and reliability in the data center. It is needed to balance between the each unit in parallel operation. In order to suppress the current imbalance between each unit, the maximum current tracking control is operated. The speed of the soft-start operation should be set up depending to the load conditions. In the proposed control method, the fastest speed of the soft-start is determined using the approximated liner function of output current which is obtained from the experiment results in advance. The proposed control method has the superior soft-start characteristics of the output voltage. As a result, the convergence time of the output voltage is improved.