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:
May. 16, 2017
Filed:
Jun. 08, 2016
Central Japan Railway Company, Nagoya-shi, Aichi, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, Kanagawa, JP;
Kei Sakanoue, Kiyose, JP;
Hirokazu Kato, Funabashi, JP;
Hiroki Shimoyama, Nagoya, JP;
Tomotaka Nishijima, Kobe, JP;
Junichi Ishii, Kobe, JP;
Yasushi Matsumoto, Hino, JP;
Toshie Kikuchi, Kokubunji, JP;
CENTRAL JAPAN RAILWAY COMPANY, Nagoya-Shi, Aichi, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, Kanagawa, JP;
Abstract
A controlling apparatus includes a storage unit for storing, for each sampling period, a combination of a primary frequency of connected induction motors and the amplitude of a voltage command value, and a gradient detection unit for calculating a value corresponding to an increase in the amplitude of the voltage command value divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors include at least one induction motor having a phase sequence that includes incorrect wiring with respect to the power converter.