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

Control method for multi-stator arc-shaped motor of large telescope

A technology of arc motor and control method, applied in electronic commutation motor control, motor generator control, control system, etc., to reduce torque fluctuation, improve tracking accuracy, and meet the effect of low-speed and high-precision rotation

Inactive Publication Date: 2014-09-10
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large torque fluctuations in multi-stator arc motors, and provide a method for reducing torque fluctuations in multi-stator arc motors for large telescopes through magnetic resistance compensation

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
  • Control method for multi-stator arc-shaped motor of large telescope
  • Control method for multi-stator arc-shaped motor of large telescope
  • Control method for multi-stator arc-shaped motor of large telescope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] The actual output torque of multi-stator motor mainly includes two parts, electromagnetic torque and disturbance torque. The disturbance torque here mainly refers to the reluctance torque of the motor itself. Assuming that the motor winding does not contain high-order harmonics and the air-gap flux density of the motor is a sine wave, the electromagnetic torque output by the motor is a constant value. The reluctance torque of the motor is related to its own structure and is generally a function of periodic fluctuations. When using vector control, there is a linear relationship between the electromagnetic torque of the motor and the quadrature axis current. Since the reluctance torque is a periodic function of the...

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 control method for a multi-stator arc-shaped motor of a large telescope. The control method mainly comprises the following steps that firstly, detent force of the arc-shaped motor is measured, and the magnitudes of the detent force at different positions are obtained; secondly, Fourier nonlinear regression analysis is conducted on obtained position-following detent force change information, and a position-following detent force magnitude change expression of the motor is obtained; thirdly, CLARKE conversion and PARK conversion are conducted on collected three-phase current to obtain direct-axis current id and quadrature-axis current iq; fourthly, a detent force expression obtained through fitting is divided by the moment coefficient of the motor to obtain a position-following compensation current expression; fifthly, in a quadrature-axis current ring, theoretical reference current I*qv is subtracted by compensation current Iqr to obtain actual quadrature-axis reference current I*q. According to the a control method for the multi-stator arc-shaped motor of the large telescope, torque fluctuation, caused by the end effect, of the arc-shaped motor can be eliminated to a large extent, and the requirement for low-speed high-precision rotation of the motor is met.

Description

technical field [0001] The invention belongs to the field of electromechanical control, in particular to a multi-stator arc motor control method for reducing the size of a large telescope through magnetic resistance compensation. Background technique [0002] With the development of science and technology, the size of modern photoelectric detection equipment is getting bigger and bigger. For example, the size of the latest foreign astronomical telescope has reached 30m-50m. The previous transmission system can no longer meet the moment of inertia and mechanical stiffness required by these photoelectric detection devices. According to the traditional telescope design scheme, the diameter of the directly driven torque motor that needs to be adopted will reach more than 10m. This will bring great trouble to the processing and transportation of the motor. Aiming at this problem, a new multi-stator arc motor drive method has been applied. This kind of motor is composed of mult...

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
IPC IPC(8): H02P21/05
Inventor 常九健马文礼
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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