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. 19, 2016
Filed:
Apr. 11, 2014
Applicant:
Okuma Corporation, Niwa-gun, Aichi, JP;
Inventors:
Takeshi Sakai, Niwa-gun, JP;
Akiyoshi Satake, Niwa-gun, JP;
Assignee:
OKUMA CORPORATION, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 11/32 (2006.01); G05B 19/404 (2006.01);
U.S. Cl.
CPC ...
G05B 19/404 (2013.01); G05B 2219/37297 (2013.01); G05B 2219/41034 (2013.01); G05B 2219/41264 (2013.01); G05B 2219/41265 (2013.01); G05B 2219/41395 (2013.01);
Abstract
An electric motor control device for performing tandem control for driving one movable component includes, for each electric motor, a position controller, a speed controller, and a current controller. Further, each electric motor also has a preload controller for adding a preload torque to a torque command Tm calculated by the speed controller, and to a torque command Ts calculated by the speed controller. The preload controller calculates a minimum necessary preload torque for eliminating backlash in accordance with a position of the movable component.