Development of Digital Peak-Current-Mode and Fast Feedback Control DC-DC Converter System in Green IT Project
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; Kajiwara, Kazuhiro; Maruta, Hidenori; Shibata, Yuichiro; Yamabe, Yoshihiko (Nagasaki University, Nagasaki, Japan)
Tanaka, Toru; Hirose, Keiichi (NTT Facilities, Tokyo, Japan)
Abstract:
The purpose of this paper is to present the prototype of digital peak-current-mode and fast feedback control dc-dc converter system with the energy management. The prototype has been developed for the higher voltage direct current (HVDC) system in the data center. The proposed digital control circuit has two features for quick responses. One is a fast P control for quick feedback calculation of output voltage. Another one is a digital peak current mode control circuit which can detect the peak current in real time unlike the conventional method. In this paper, the power efficiency and transient response of prototype has been measured in the parallel operation using up to 4 prototypes. As a result, the efficiency of prototype can keep at least 91% in more than 11% load. Furthermore, the prototype shows a superior transient response. The convergence time of output voltage can be improved by 33% compared with the conventional digital control method.