Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Stepping motor controller and image-reading device

A technology for stepping motors and controllers, applied in motor generator control, printing devices, control systems, etc., can solve problems such as inability to restore drive stepping motors

Active Publication Date: 2012-03-21
BROTHER KOGYO KK
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, it is not always possible to resume driving the stepper motor from the rotational position where the motor stopped before the recorder entered sleep mode

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stepping motor controller and image-reading device
  • Stepping motor controller and image-reading device
  • Stepping motor controller and image-reading device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The structure of the stepper motor controller

[0032] Embodiments of the present invention will be described below with reference to the accompanying drawings. figure 1 is a block diagram showing the structure of a stepping motor controller (hereinafter simply referred to as "motor controller") 50 according to an embodiment of the present invention. Such as figure 1 As shown in , the motor controller 50 is composed of a motor driver 60 having a switch 65 and an application specific integrated circuit (ASIC) 70 that controls the motor driver 60 described below. The motor controller 50 is used to control the stepping motor (hereinafter referred to as “motor”) 23 .

[0033] The ASIC 70 is not only used to control the motor driver 60 . For example, when the motor 23 is integrated into the following image reading device 1 (see Figure 4 ) and the motor controller 50 controls the motor 23, the ASIC 70 may be configured to control the reading unit 21 described below and o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a stepping motor controller and an image-reading device. The stepping motor controller for controlling a stepping motor includes: a motor driver; and a driver control unit. The motor driver includes: an excitation phase control unit; and a drive unit. The driver control unit includes: a motor driver power control unit; a drive control unit; a clock signal output unit; and an excitation phase storing unit. The excitation phase storing unit acquires an excitation phase at a time when the motor driver power control unit stops supplying electricity to the motor driver, and stores the acquired excitation phase as a suspension excitation phase. When the motor driver power control unit resumes supplying electricity to the motor driver, the drive control unit instructs the drive unit to continue to halt the supply of the drive current until the excitation phase signal is updated, in response to each pulse of the clock signal, to an excitation phase signal specifying the suspension excitation phase, and instructs the drive unit to supply the drive current after the excitation phase signal is updated to reach the excitation phase signal specifying the suspension excitation phase.

Description

technical field [0001] The present invention relates to a stepping motor controller and an image reading device having a motor driver for driving the stepping motor while updating the field phase in response to a clock signal, and an image reading device operating using the stepping motor control to read to take the image. Background technique [0002] Stepper motors typically consist of a rotor fixed to the motor's rotating drive shaft and a stator mounted around the rotor. A motor driver for driving a stepper motor is able to drive the rotor in fixed angular increments in the forward rotation direction by sequentially applying currents corresponding to the excitation to the coils wound around the stator. The field phase specifies how the motor driver supplies current to the coils within the stepper motor. The rotational position (rotor position) of the stepping motor is therefore determined from this excitation phase. [0003] There are two types of motor drivers used t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/00
CPCH02P8/00B41J29/38H02P8/26H02P8/28H02P23/0077
Inventor 前田纯司
Owner BROTHER KOGYO KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com