Title :
Abnormal Phenomenon of Output-Voltage Increase and Its Solution in a Parallel-Redundant DC-DC Converter System with Current Sharing Control
Author :
Shimamori, Hiroshi ; Itakura, Kazuhiko ; Yamashita, Shigeharu ; Kohama, Teruhiko ; Ninomiya, Tamotsu
Author_Institution :
Enterprise Server Div., Fujitsu Limited, Kanagawa
Abstract :
Abnormal phenomenon of output voltage is observed in a paralleled N+1 redundant DC-DC converter (DDC) system. The phenomenon is caused by a current sharing control under the condition of periodic load change, resulting in output-voltage increase. The mechanism of the phenomenon is analyzed with a circuit simulator and confirmed by experiment. A new type of current sharing circuit is proposed to solve the problem
Keywords :
DC-DC power convertors; circuit simulation; electric current control; resonant power convertors; circuit simulator; current sharing circuit; current sharing control; output-voltage; parallel-redundant DC-DC converter system; periodic load change; Analytical models; Circuit analysis; Circuit simulation; Control systems; DC-DC power converters; Impedance; Mission critical systems; Power supplies; Power system reliability; Voltage control;
Conference_Titel :
Telecommunications Conference, 2005. INTELEC '05. Twenty-Seventh International
Conference_Location :
Berlin
Print_ISBN :
978-3-8007-2905-0
DOI :
10.1109/INTLEC.2005.335159
