Supercharge Your Innovation With Domain-Expert AI Agents!

Step motor driving device and method

一种步进电机、驱动装置的技术，应用在电动发电机控制、电气元件、电气程序控制等方向，能够解决无法完全地消除振动和噪声等问题

Inactive Publication Date: 2007-05-16
コラボイノベーションズインコーポレイテッド
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, there is still some vibration and noise due to the torque fluctuation that occurs every time the step waveform rises and falls, so the effect of the conventional drive device cannot completely eliminate the vibration and noise
This problem is especially acute when stepper motors are used in camera electronics

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
  • Step motor driving device and method
  • Step motor driving device and method
  • Step motor driving device and method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0067] The stepper motor driving device of the first embodiment of the present invention generates a reference signal whose waveform has no sharp change in level and which exhibits a current limit value. Here, a waveform whose level does not change sharply is a waveform represented by a continuous function. The level change of a waveform represented by a continuous function is smooth. For example, sine, triangle, and trapezoidal waveforms that slope up and down are all examples of this type, but neither staircase nor rectangular waveforms are.

[0068] The stepping motor drive device performs PWM (pulse width modulation) control on the coil current according to the current limit value indicated by the reference signal. In detail, the PWM control is performed using a current limiting method.

[0069] The stepping motor driving device is explained in detail below with reference to the accompanying drawings.

[0070] (the whole frame)

[0071] Figure 1 shows a functional bloc...

no. 2 example

[0105] The difference between the stepping motor driving device of the second embodiment of the present invention and the stepping motor driving device of the first embodiment lies in that, by identifying the pulse frequency of the clock signal CLKP among multiple pulse frequencies, gradation can be generated inside the device. frequency signal FDA, and using the generated graded frequency signal FDA to generate a reference signal VCTA. The following description mainly focuses on this point of difference from the first embodiment.

[0106] (Structure related to generation of reference signal VCTA)

[0107] Fig. 8 shows a functional block diagram of the structure related to the generation of the reference signal VCTA in the second embodiment. The difference between this structure and the first embodiment is that a pulse frequency identification unit 22 is added. The pulse frequency identification unit 22 generates the graded frequency signal FDA by identifying the pulse frequ...

no. 3 example

[0119] The difference between the stepping motor driving device of the third embodiment of the present invention and the second embodiment lies in the structure related to the generation of the reference signal VCTA. The following description mainly focuses on this point of difference from the second embodiment.

[0120] (Structure related to generation of reference signal VCTA)

[0121] Fig. 11 is a functional block diagram showing the structure related to the generation of the reference signal VCTA in the third embodiment. This structure differs from the second embodiment in that an integrating circuit 25 is included instead of the integrating circuit 3 .

[0122] (integrating circuit 25)

[0123] FIG. 12 is a functional block diagram showing a detailed structure of the integration circuit 25 . In the integration circuit 25, switches controlled by the graded frequency signal FDA and the program signal PRG are provided to adjust the resistance for determining the integrati...

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

A reference signal generation unit integrates a staircase signal, to produce reference signal VCTA whose waveform has no abrupt changes in level and which shows a current limit value. A PWM reference signal generation unit generates a PWM reference signal. A supply current measurement unit measures a supply current to a coil. A PWM control unit compares reference signal VCTA with the measurement value of the supply current measurement unit in each period of the PWM reference signal, and sets each transistor in a bridge rectification circuit in a conducting state or a nonconducting state according to the comparison result. In this way, the supply current to the coil is controlled to approach the current limit value shown by reference signal VCTA.

Description

[0001] This application is based on Japanese Patent Application No. 2002-381355, and the contents thereof are incorporated herein by reference. technical field [0002] The invention relates to a stepping motor driving device, in particular to a technology for driving a stepping motor with low noise and small vibration. Background technique [0003] In recent years, stepping motors are used in imaging electronic devices, such as DSC (Digital Still Camera) and DVC (Digital Video Camera), as optical system actuators for adjusting aperture, focusing, zooming, and the like. [0004] Stepper motors, especially those used in camera electronics, require low noise and vibration for operation. This is because the sound generated by the stepping motor is captured by the built-in microphone of the camera electronics and recorded as noise, and the vibration generated by the stepping motor makes the camera electronics unstable and causes image quality problems. Decline. [0005] Accord...

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 Patents(China)
IPC IPC(8): H02P8/22H02P8/12G05B19/40H02P8/18H03K7/08
CPCG05B19/40G05B2219/42198H03K7/08G05B2219/41117H02P8/18G05B2219/42237
Inventor 松永弘树深水新吾
Owner コラボイノベーションズインコーポレイテッド
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com