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:
Mar. 08, 2016
Filed:
May. 16, 2014
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Koji Sato, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 3/10 (2006.01); H02P 8/22 (2006.01); H02P 8/32 (2006.01); H02P 8/38 (2006.01);
U.S. Cl.
CPC ...
H02P 8/22 (2013.01); G03B 3/10 (2013.01); H02P 8/32 (2013.01); H02P 8/38 (2013.01);
Abstract
A drive controller includes a stepping motor capable of performing micro-step drive of a predetermined number of divisions by using an excitation current having a sine waveform, and a control unit configured to calculate a first drive pulse of the stepping motor to perform the micro-step drive, and the control unit is configured to change the first drive pulse to a second drive pulse depending on a ratio of a step phase of a predetermined phase region included in a range of the micro-step drive when performing the micro-step drive with the first drive pulse in a wobbling operation.