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Motor control apparatus, sheet conveyance apparatus, and document feeding apparatus

A technology for controlling equipment and motors, which is applied in the directions of motor generator control, AC motor control, equipment for electrical recording technology applying charge patterns, etc., and can solve problems such as inability to correctly control the amount of sheet material conveying.

Inactive Publication Date: 2019-10-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] For example, in the case where a stepping motor is used to drive a conveying roller provided in a sheet conveying apparatus for conveying sheets, if the rotation phase at which the rotor stops exceeds the phase at which the rotor needs to be stopped, it may not be possible to Proper control of sheet conveying volume

Method used

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  • Motor control apparatus, sheet conveyance apparatus, and document feeding apparatus
  • Motor control apparatus, sheet conveyance apparatus, and document feeding apparatus
  • Motor control apparatus, sheet conveyance apparatus, and document feeding apparatus

Examples

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Embodiment Construction

[0027] Embodiments of the present invention will be described below with reference to the drawings. However, the shapes and relative arrangements of elements described in the embodiments are not limited thereto, and may be modified as necessary in accordance with the configuration of the device according to the present invention and other various conditions. The scope of the present invention is not limited to the Examples described below. Although in the case described below, the imaging device is provided with the motor control device, the device provided with the motor control device is not limited to the imaging device. For example, motor control devices are also used in sheet conveying devices for conveying sheets such as recording media and documents.

[0028] [imaging equipment]

[0029] The first embodiment will be described below. figure 1 is a sectional view showing the configuration of a monochrome electrophotographic copier (image forming apparatus) 100 includi...

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PUM

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Abstract

The disclosure relates to a motor control apparatus, a sheet conveyance apparatus, a document feeding apparatus, a document reading apparatus and an image forming apparatus. The motor control apparatus includes a detector configured to detect a drive current; a phase determiner configured to determine a rotation phase of a rotor of a motor; and a controller provided with a first control mode for controlling the motor by controlling the drive current flowing in a winding of the motor so as to reduce a deviation between an instructed phase and the rotation phase, and a second control mode for controlling the motor based on a current having a predetermined magnitude. The controller decelerates the rotor after switching a control mode for controlling the motor from the first control mode to the second control mode in a state where the rotor is being rotated at a predetermined speed based on the first control mode.

Description

technical field [0001] The present invention relates to motor control in a motor control device, a sheet conveying device, a document feeding device, a document reading device, and an image forming device. Background technique [0002] In a known conventional configuration, a stepping motor (hereinafter referred to as a motor) is switched in response to switching between phases of a winding magnetized according to a drive pulse output from a higher-level device such as a central processing unit (CPU). drive. The number of drive pulses corresponds to the phase advance amount of the rotor of the motor, and the period (frequency) of the drive pulses corresponds to the command speed representing the target speed of the rotor. [0003] Generally, a control method called vector control is considered as a method for controlling a motor. In vector control, the current value is controlled in a rotating coordinate system based on the rotational phase of the rotor of the motor. More...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/12B65H5/06
CPCH02P8/12B65H5/062B65H2801/09B65H2801/06G03G15/80G03G15/6511G03G15/602G03G15/6529H02P21/0021H02P21/18H02P21/24H02P8/14H02P21/22H02P27/06H02P27/08H02P21/16
Inventor 须田健之
Owner CANON KK