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:
Nov. 20, 2018
Filed:
Dec. 22, 2016
Okuma Corporation, Niwa-gun, Aichi, JP;
Tomohiro Shibata, Aichi, JP;
Yoshimaro Hanaki, Aichi, JP;
OKUMA CORPORATION, Niwa-Gun, Aichi, JP;
Abstract
A motor control device calculates a velocity difference based on a velocity command and a velocity detection value of a motor and an excitation current common phase voltage difference based on an excitation current command value and an excitation current detection value, and judges that demagnetization occurs when the following conditions are all met: the excitation current common phase voltage difference exceeds a voltage threshold; the velocity difference exceeds a velocity threshold; and acceleration is being performed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile