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. 23, 2004
Filed:
Oct. 18, 2002
Takehiko Komiya, Fukuoka, JP;
Kozo Ide, Fukuoka, JP;
Ryuichi Oguro, Fukuoka, JP;
Keisei Inoki, Fukuoka, JP;
Tetsuro Izumi, Fukuoka, JP;
Kazuhiro Tsuruta, Fukuoka, JP;
Nobuhiro Umeda, Fukuoka, JP;
Soki Kaku, Fukouka, JP;
Kabushiki Kaish Yaskawa Denki, Fukuoka, JP;
Abstract
A electric motor control device is provided for controlling an electric motor which actuates a movable member of a machine through a transmitting mechanism. When a torque command is given as motion command signal ( ) to servo device ( ), servo device ( ) sends input torque signal ( ) corresponding to motion command signal ( ) to electric motor ( ), which is energized. Movable member ( ) is thus moved, producing vibrations. Servo device ( ) outputs input torque signal ( ) equivalent to input torque signal ( ), and input torque signal ( ) and rotational speed signal ( ) are stored in memory device ( ). Analyzing device ( ) analyzes the frequencies of input torque signal ( ) and rotational speed signal ( ) according to an FFT, and outputs analytical result ( ).