Invention Grant
- Patent Title: Motor control device and imaging apparatus
- Patent Title (中): 电机控制装置及成像装置
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Application No.: US13756578Application Date: 2013-02-01
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Publication No.: US08649676B2Publication Date: 2014-02-11
- Inventor: Yoshihiro Ohtani
- Applicant: Panasonic Corporation
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Panasonic Patent Center
- Priority: JP2012-020577 20120202
- Main IPC: G03B5/00
- IPC: G03B5/00 ; G05B19/29 ; G02B15/02

Abstract:
A motor control device includes a counter that counts pulses output from a one-phase encoder according to rotation of a DC motor, and a controller that recognizes rotation number of the DC motor based on the number of pulses counted by the counter. After the DC motor is braked, the controller starts applying a predetermined voltage to the DC motor at first timing before the DC motor stops, and stops applying the predetermined voltage at second timing after the DC motor stops. The controller subtracts the number of pulses generated after the second timing from a value counted by the counter. The predetermined voltage is lower than a lowest voltage necessary for driving a driven object, and is higher than a lowest voltage necessary for rotating the DC motor against an attracting force between a magnet and a coil in the DC motor.
Public/Granted literature
- US20130201389A1 MOTOR CONTROL DEVICE AND IMAGING APPARATUS Public/Granted day:2013-08-08
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