Invention Grant
- Patent Title: Motor control apparatus, sheet conveyance apparatus, and image forming apparatus
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Application No.: US15703617Application Date: 2017-09-13
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Publication No.: US10669112B2Publication Date: 2020-06-02
- Inventor: Shingo Kitamura
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@422932a9
- Main IPC: B65H7/20
- IPC: B65H7/20 ; B65H1/04 ; B65H5/06 ; B65H5/02 ; H02P21/22 ; H02P29/50 ; H04N1/00 ; B41J29/38 ; B41J11/00 ; G03G15/00

Abstract:
To control a winding drive current of a motor based on a command phase representing a target phase of a rotor of the motor, a motor control apparatus includes a filter circuit, a phase determiner, and a controller. A current value of the drive current flowing through the winding is obtained at a predetermined period. The filter circuit reduces a harmonic component in a fundamental frequency of the drive current included in a signal indicated by the obtained current value. The phase determiner determines a rotation phase of the rotor based on a filter processed signal. The controller controls the winding drive current to reduce a deviation between the command phase and the determined rotation phase. The filter circuit reduces a harmonic component from a signal indicated by current values of which a number is not greater than a number of the current values obtained at the predetermined period.
Public/Granted literature
- US20180079611A1 MOTOR CONTROL APPARATUS, SHEET CONVEYANCE APPARATUS, AND IMAGE FORMING APPARATUS Public/Granted day:2018-03-22
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