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:
Feb. 12, 2008
Filed:
Jul. 19, 2004
Toshiyuki Andoh, Kanagawa-ken, JP;
Tadashi Shinohara, Kanagawa-ken, JP;
Yuuji Matsuda, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Nobuto Yokokawa, Saitama-ken, JP;
Masato Yokoyama, Kanagawa-ken, JP;
Yohhei Miura, Chiba-ken, JP;
Toshiyuki Takahashi, Kanagawa-ken, JP;
Jun Hosokawa, Tokyo, JP;
Toshiyuki Andoh, Kanagawa-ken, JP;
Tadashi Shinohara, Kanagawa-ken, JP;
Yuuji Matsuda, Tokyo, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Nobuto Yokokawa, Saitama-ken, JP;
Masato Yokoyama, Kanagawa-ken, JP;
Yohhei Miura, Chiba-ken, JP;
Toshiyuki Takahashi, Kanagawa-ken, JP;
Jun Hosokawa, Tokyo, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor rotational speed are disclosed. A motor drive controller includes a drive motor, a detector, and a motor drive controller. The drive motor drives a moving body around a target speed. The detector detects a current moving speed of the moving body and outputs it as a detector pulse signal. The controller calculates a difference between the current moving speed and the target moving speed, calculates a control value based on the difference, calculates a pulse rate of a drive pulse signal based on the control value after having controlled the control value to be within a predetermined value, and controls the drive motor based on the pulse rate.