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

Field weakening control method and device for a permanent magnet direct current motor

A technology of field-weakening control and permanent-magnet DC, which is applied in motor generator control, electromechanical transmission control, electronic commutation motor control, etc. It can solve problems such as complex torque and jitter in algorithms, and achieve simple debugging and calculation links less, the algorithm is simple and reliable

Active Publication Date: 2019-05-17
深圳市双驰科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a field-weakening control method and device for a permanent magnet DC motor, which has a simple algorithm and does not easily cause torque jitter in view of the above-mentioned complex algorithm in the prior art and the defect of torque jitter

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 and device for a permanent magnet direct current motor
  • Field weakening control method and device for a permanent magnet direct current motor
  • Field weakening control method and device for a permanent magnet direct current motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention obtains the error of the voltage model by limiting the voltage model of the dq axis, and the error of the voltage model is multiplied by the current rotor electrical angular velocity and a suitable constant after the integration process, and the obtained product is used as the output of the compensation angle, and finally Then add it to the MTPA angle as the output of the phase angle after field weakening. The realization principle of the technical solution of the present invention is illustrated below:

[0032] 1. Neglecting the stator resistance voltage drop, the difference between the reference voltage output by the current loop controller and the actual voltage ud and uq output after overmodulation is expressed in the dq coordinate system as:

[0033]

[0034] Among them, ωe is the electrical speed of the motor, Ld and Lq are the inductances of the d and q axes of the motor respectively, φf is the flux linkage of the motor rotor, and id* and...

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 flux weakening control method and device for a permanent magnet direct-current motor. The flux weakening control method comprises steps as follows: calculating an error of a voltage mode according to a voltage value output by a current loop controller in a dq rotating coordinate system and a limit value of the voltage mode; calculating a compensation angle according to the error of the voltage mode and an electrical angular velocity of a rotor; obtaining an MTPA (maximum torque per ampere) angle according to a current reference vector; adding the compensation angle to the MTPA angle to generate a flux weakened phase angle; calculating a current reference value in the dq rotating coordinate system according to the flux weakened phase angle and the current reference vector and transmitting the current reference value in the dq rotating coordinate system into the current loop controller. With the implementation of the technical scheme, few algorithm links are needed, the debugging process is simple, and high-frequency noise is reduced.

Description

technical field [0001] The invention relates to the field of motors, in particular to a field weakening control method and device for a permanent magnet DC motor. Background technique [0002] With the continuous improvement and improvement of the performance of permanent magnet materials and the gradual maturity of the research and development experience of permanent magnet motors, permanent magnet synchronous motors are developing towards high power, high performance and miniaturization. Due to the use of permanent magnets to provide air-gap flux, permanent magnet synchronous motors have the advantages of simple structure, small size, light weight, low loss, and high efficiency, and have been widely used in performance servo control and other fields. [0003] For permanent magnet DC motor control, since the DC side voltage of the inverter reaches the maximum value, the current loop controller will be saturated. In order to obtain a wider range of speed regulation and achie...

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): H02P21/00H02P21/14
CPCH02P21/0003H02P21/14
Inventor 孙冬晨
Owner 深圳市双驰科技有限公司
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