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

Field-weakening control method for permanent magnet synchronous motor

A permanent magnet synchronous motor and field-weakening control technology, which is applied in motor control, motor generator control, AC motor control, etc., can solve the problems of easy instability of motor vibration, reduce motor vibration, and reduce current ripple. wave, increasing the stability effect

Active Publication Date: 2017-11-24
SHANGHAI SIGRINER STEP ELECTRIC
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In field weakening control (such as no current loop field weakening control and single current loop field weakening control methods), as the field weakening depth deepens (speed increases and load increases), the motor vibration increases and is prone to instability.

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
  • Field-weakening control method for permanent magnet synchronous motor
  • Field-weakening control method for permanent magnet synchronous motor
  • Field-weakening control method for permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] figure 2 A control principle block diagram of a field weakening control method for a permanent magnet synchronous motor according to an embodiment of the present invention is shown. Please refer to figure 2 , according to an embodiment of the present invention, a permanent magnet synchronous motor field weakening control method and figure 1 Compared with the existing permanent magnet synchronous motor field weakening control method shown in , the main difference is that the addition of i q high frequency compensation, that is figure 2 The part shown in the dotted box.

[0016] Specifically, the field weakening control method for a permanent magnet synchronous motor according to an embodiment of the present invention includes the following steps:

[0017] Step a. Obtain the d-axis output voltage U through no-current-loop field-weakening control d0 "and q...

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 discloses a field-weakening control method for a permanent magnet synchronous motor, and the method comprises the steps: a, obtaining a d-axis output voltage Ud0'' and a q-axis output voltage Uq0'' through no-current-loop field-weakening control or single-current-loop field-weakening control; b, adding a high-frequency q-axis compensation current iq'' to the q-axis output voltage Uq0'', so as to reduce the ripple current in an actual q-axis current iq of the permanent magnet synchronous motor. In the field-weakening operation, the method achieves the compensation for a high-frequency quadrature axis current in the q-axis output voltage, reduces the current ripples of the actual q-axis current iq of the permanent magnet synchronous motor and the motor vibration, and improves the operation stability of the motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a field weakening control method for a permanent magnet synchronous motor. Background technique [0002] In the existing vector control method for permanent magnet synchronous motors, as the motor speed increases, the required output voltage of the power converter increases linearly. However, the output voltage of the power converter is limited. When the motor control demand voltage exceeds the voltage of the power converter, field weakening control is required. In field weakening control (such as no current loop field weakening control and single current loop field weakening control methods), as the field weakening depth deepens (speed increases and load increases), the motor vibration increases and is prone to instability. . [0003] figure 1 It shows a control principle block diagram of an existing motor controller performing non-current loop field weakening control. In the...

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): H02P21/00H02P21/22H02P25/024H02P27/08H02P25/026
CPCH02P21/0089H02P21/22H02P25/024H02P25/03H02P27/08H02P2205/01H02P2207/055
Inventor 金辛海陈伟曾彦能
Owner SHANGHAI SIGRINER STEP ELECTRIC
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