The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2007
Filed:
Jul. 27, 2004
Katsunori Hayashi, Odawara, JP;
Katsunori Hayashi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The disk array device supplies appropriate power to various parts in accordance with the operating mode in cases where the output of the main power supply drops. The disk array device adjusts the power from a commercial power sourcewith an AC/DC power supply, and supplies this power to a power supply common bus. A disk drive groupand a control circuit board groupconstituting electrical loads are respectively connected to the power supply common bus. When the supply of power from the main power supply stops, the capacitor boxsupplies a relatively large current for a short time only, in order to retain data during an instantaneous power outage. Then, the battery boxessupply power to the power supply common busfor a relatively long period of time, in order to perform destage control and memory backup. The battery boxesperform balancing control of the output current in order to suppress variation in the output current value among the battery boxes