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:
Jun. 16, 2015
Filed:
Feb. 18, 2010
Kouhei Tomita, Fuchu, JP;
Toshihiko Endo, Yokohama, JP;
Kouhei Tomita, Fuchu, JP;
Toshihiko Endo, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
There is proposed a lubricant system having a plurality of motor-driven pumps operating in parallel as main oil pumps, wherein even if at least one of the main oil pumps stops, the other normally operating main oil pumps do not stop due to overload of a motor. A lubricant systemcomprises a hydraulic pressure piping, a plurality of lubricant pumpsarranged in parallel, a plurality of AC motorsdriving each of the lubricant pumps, an error detectordetecting a presence or absence of an error in an operating state of each of the AC motors, a pressure loss addition unitconfigured to increase pressure loss in the hydraulic pressure piping, and a controllercausing the pressure loss addition unitto increase pressure loss when the error detectordetects an error in at least one of the AC motors. When an error occurs in at least one of the AC motors, the lubricant systemchanges each working point of the lubricant pumpsdriven by another AC motorto a lower flow side than that in a steady operation.