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. 28, 2015
Filed:
Jan. 28, 2013
Natsuko Ishizuka, Kanagawa, JP;
Hiroyuki Kiguchi, Kanagawa, JP;
Takeo Seki, Kanagawa, JP;
Takuya Murata, Tokyo, JP;
Natsuko Ishizuka, Kanagawa, JP;
Hiroyuki Kiguchi, Kanagawa, JP;
Takeo Seki, Kanagawa, JP;
Takuya Murata, Tokyo, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A motor control device includes a motor lock state determining unit configured to determine whether a motor is in a rotation lock state; a position hold state determining unit configured to determine whether the motor is in a position hold state; a lock detection invalidation determining unit configured to invalidate the determination of the lock state when the motor is in the position hold state and when a predetermined condition is satisfied; a position error correction unit configured to correct an error of a target stop position of the motor when the determination of the lock state is invalidated; and a motor control unit configured to change a rotation direction of the motor in a time shorter than a time in which the motor lock state determining unit determines the lock state when the motor is in the position hold state after the error is corrected.