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:
May. 26, 2020
Filed:
Sep. 28, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Shingo Kitamura, Abiko, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A motor control device includes a detector, a phase determiner, a controller, and an outputter. The detector detects a drive current. The phase determiner determines a rotation phase of a rotator based on the detected drive current. The controller is configured to perform control in a first mode for controlling the drive current based on a torque current component and in a second mode for controlling the drive current based on a current having a predetermined magnitude. The outputter outputs a signal indicating a value of the excitation current component of the drive current is equal to or smaller than a threshold value when the value of the detected drive current is equal to or smaller than the threshold value in a condition that the second mode is executed and a value corresponding to the rotating speed of the rotator is larger than a predetermined value.