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

Torque control method of surface-mounted permanent-magnet synchronous motor

A permanent magnet synchronous motor and torque control technology, applied in the field of electric power transmission, can solve the problems of difficult to achieve the ideal effect of identification accuracy, low reliability, and complex online parameter identification algorithm.

Inactive Publication Date: 2018-02-13
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are related literatures and patents that use parameter online identification to obtain relevant parameters of surface-mounted permanent magnet synchronous motors, but the parameter online identification algorithm is complex, the reliability is low, and the identification accuracy is difficult to achieve the desired effect

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
  • Torque control method of surface-mounted permanent-magnet synchronous motor
  • Torque control method of surface-mounted permanent-magnet synchronous motor
  • Torque control method of surface-mounted permanent-magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0031] The surface-mounted permanent magnet synchronous motor torque control method includes the following steps:

[0032] (1) Obtain multiple sets of speeds, q-axis currents and permanent magnet flux linkages of the surface-mounted permanent magnet synchronous motor, and establish a speed-q-axis current-permanent magnet flux comparison table;

[0033] (2) According to the speed-q-axis current-permanent magnet flux comparison table, and the corresponding motor speed and q-axis current of the working point to be measured, the permanent magnet flux linkage is obtained, thereby obtaining the motor rotation speed of the working point to be measured moment.

[0034] In a preferred embodiment, step (2) is:

[0035] Select the motor speed and q-axis current as the independent variable, and regard the permanent magnet flux linkage as the dependent ...

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 torque control method of a surface-mounted permanent-magnet synchronous motor. The torque control method comprises the following steps of: establishing a two-dimensional table for the rotating speed and iq of a magnetic chain, checking the table according to the rotating speed and the iq when the surface-mounted permanent-magnet synchronous motor runs, carrying out interpolating operation to obtain a real-time permanent-magnet magnetic chain value, then calculating out real-time torque of the surface-mounted permanent-magnet synchronous motor according to a torque formula, and utilizing the calculated torque as a feedback value of a torque PI (Proportion Integration) controller so as to form a closed loop of the torque. The torque control method of the surface-mounted permanent-magnet synchronous motor provides a method for obtaining the permanent-magnet magnetic-chain value changing with the working condition of the surface-mounted permanent-magnet synchronous motor in real time for a user, and has the advantages that the closed-loop control of the torque of the surface-mounted permanent-magnet synchronous motor can be realized and the torque control accuracy of the surface-mounted permanent-magnet synchronous motor can be improved.

Description

technical field [0001] The invention relates to the field of electric power transmission, in particular to the field of torque calculation and torque control accuracy research of a permanent magnet synchronous surface-mounted permanent magnet synchronous motor, and specifically refers to a torque control method of a surface-mounted permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous surface mount permanent magnet synchronous motor control system usually cannot install a torque sensor on the shaft end of the surface mount permanent magnet synchronous motor, and it is difficult to obtain accurate real-time torque of the surface mount permanent magnet synchronous motor. The torque control of the synchronous motor cannot form a closed-loop control, and it is difficult to realize the high-precision control of the torque. [0003] According to the modern permanent magnet synchronous motor control theory, there is a clear mathematical ...

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): H02P21/00H02P21/14H02P25/022
Inventor 浦蓉杰高翔林利赵艳蔡良生
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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