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:
Jun. 27, 2006
Filed:
Nov. 26, 2002
Tomohiro Miyazaki, Tokyo, JP;
Tomohiro Miyazaki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A speed control apparatus includes a speed control partfor generating a source current command based on a difference between a speed command of a motorand speed detection in which a speed of the motorfor driving a loadis detected, a notch filterwhich can break a notch frequency resulting in a predetermined frequency selected among continuous frequency band widths and also generates a compensating current command in which the notch frequency is eliminated from the source current command signal, a notch filter adaptive partfor selecting the notch frequency so that the compensating current command in which a sustained vibration frequency component of the source current command is eliminated is generated from the notch filter, a subtracterfor generating an elimination portion current command resulting in a difference between the source current command and the compensating current command, and an adderfor adding the compensating current command and the elimination portion current command and generating a current command passed through the motor