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:
Dec. 22, 2020
Filed:
May. 01, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shigeru Kameyama, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A motor control apparatus includes: a voltage control unit configured to control a voltage applied to a plurality of coils in a motor to supply an exciting current; a current detection unit configured to detect an exciting current having flown through the plurality of coils; and a detection unit configured to detect a stop position of a rotor of the motor by performing a detection process, in which the exciting current to at least a first coil of the plurality of coils is supplied by the voltage control unit, and the exciting current is detected by the current detection unit. The detection process includes a first period in which a first voltage of a first polarity is applied to the first coil, and a second period in which a second voltage of a second polarity is applied to the first coil.