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:
Oct. 29, 2019
Filed:
May. 09, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Daisuke Ishikawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control device includes at least one processor which functions as an advance angle detection unit, a storage unit configured to store information indicating a plurality of loci each indicating a relationship between the advance angle and a rotation speed of a rotor at each driving voltage, a target advance angle calculation unit configured to calculate a target advance angle based on the information, an advance angle control unit, a voltage control unit, and a switching unit configured to switch between a first control state for setting a target rotation speed by controlling the advance angle along one locus among the plurality of loci and a second control state for setting the target rotation speed by controlling the voltage in a state where the advance angle is fixed, according to the locus, the target advance angle, and the driving voltage.