Permanent-magnet synchronous motor sensorless control method adopting square-wave injection

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., and can solve problems such as poor dynamic performance of the system

Inactive Publication Date: 2016-02-24
HARBIN INST OF TECH
View PDF2 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing position sensorless control technology for permanent magnet synchronous motors suitable for low speed (zero speed). In the signal processing process, filters need to be used, and the dynamic performance of the system is poor. Position sensorless control method for permanent magnet synchronous motor

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
  • Permanent-magnet synchronous motor sensorless control method adopting square-wave injection
  • Permanent-magnet synchronous motor sensorless control method adopting square-wave injection
  • Permanent-magnet synchronous motor sensorless control method adopting square-wave injection

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0032] Specific implementation mode 1. Refer to Figure 1 to Figure 6 Specifically explain this embodiment, a permanent magnet synchronous motor position sensorless control method using square wave injection described in this embodiment, the method includes the following steps:

[0033] Step 1. Based on the high-frequency mathematical model of the permanent magnet synchronous motor, a square wave voltage signal is injected into the d-axis of the control shaft system, and the high-frequency current response signal and the fundamental frequency signal under the control shaft system are extracted. The specific method is as follows:

[0034] Step 11. Based on the high-frequency mathematical model of the permanent magnet synchronous motor, the injection frequency of the d-axis of the control shaft system is f s =1 / T s , the amplitude is The square wave voltage signal of

[0035] Carry out Park transformation according to the formula (1) to obtain the current signal i under th...

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 permanent-magnet synchronous motor sensorless control method adopting square-wave injection belongs to the field of motor control. The invention aims to solve the problem that the permanent-magnet synchronous motor is applicable to low-speed sensorless control technologies and the traditional sine signal injection method demands high injection frequency and is of poor dynamic performance. First, a square-wave voltage signal is injected to a control shafting; then, the signal is processed based on excited current response under an observation shafting which lags behind the control shafting by 45 degrees to obtain a position deviation signal; and finally, the observed value of the rotor position is obtained through a Luenberger observer. The method of the invention is applicable to permanent-magnet synchronous motor sensorless control.

Description

technical field [0001] The invention belongs to the field of motor control, and relates to a position sensorless control method suitable for low-speed (zero-speed) permanent magnet synchronous motors based on square wave signal injection. Background technique [0002] In recent years, the speed control system of permanent magnet synchronous motor has gradually become a research hotspot in the field of AC speed control transmission. The reason is that compared with the traditional asynchronous motor, the advantages of the permanent magnet synchronous motor are: simple structure, small size, light weight, reliable operation, high power density, good speed regulation performance, etc. It is the ideal choice for high-speed electric drive system, and its application field is very wide. According to the structure of the permanent magnet of the permanent magnet synchronous motor rotor, it can be divided into two types: surface mount type and built-in type. [0003] At present, in...

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): H02P21/13H02P21/18
CPCH02P21/13
Inventor 徐殿国张国强王高林倪荣刚
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap