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:
Jul. 28, 2020
Filed:
Apr. 05, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Koji Kawamura, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In order to shorten an activation time while realizing stable motor control, a motor control apparatus operable to control a motor is provided. The apparatus controls so as to drive the motor by the forced commutation control in a duration from a start of control of the motor until a first time period elapses, and control so as to drive the motor by the vector control after the first time period has elapsed. In addition, the apparatus controls an execution frequency of a current detection and a rotation speed estimation. The apparatus controls so that a first execution frequency in a second time period after a switch is made from driving by the forced commutation control to driving by the vector control is greater than a second execution frequency in a third time period subsequent to the second time period.