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:
Apr. 25, 2017
Filed:
Dec. 13, 2013
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
Yusuke Kikuchi, Kanagawa, JP;
Atsushi Horikoshi, Kanagawa, JP;
Satoshi Ozaki, Kanagawa, JP;
Yoshihiro Aosaki, Kanagawa, JP;
Takeshi Senba, Gunma, JP;
Hisayoshi Koiwai, Gunma, JP;
Shigeo Shinohara, Gunma, JP;
Kenji Mori, Kanagawa, JP;
Masahiro Okutani, Gunma, JP;
Takaaki Sekine, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A motor control apparatus includes a motor current shutoff unit inserted between a multi-phase inverter circuit and a multi-phase electric motor to shut off a current for each of plural phases, the inverter circuit including an arm for each of the plural phases, a redundant arm unit including one or more arms, a connection selecting unit selecting which one of windings of the electric motor is to be connected to each of the one or more arms of the redundant arm unit, an abnormal arm detection unit detecting an abnormality in each of the plural phases of the inverter circuit, and an abnormality control unit shutting off connection between an abnormal arm and the motor when the abnormal arm detection unit detects the abnormal arm, and connecting the one or more arms of the redundant arm unit to a winding of the motor shut off.