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

Induction motor flux weakening control method based on optimized six-beat operation

A technology of field weakening control and induction motor, applied in motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of reducing current loop bandwidth, increasing harmonics, and deteriorating system performance, etc. Achieve the effect of increasing the maximum torque and ensuring dynamic performance

Active Publication Date: 2020-06-12
HARBIN INST OF TECH +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the nonlinear expansion of the stator voltage of the motor causes the increase of harmonics and the deterioration of the system performance, and at the same time aims at the problem that the traditional filter will reduce the bandwidth of the current loop, a method based on optimized six-beat operation is proposed. Induction Motor Field Weakening Control Method

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
  • Induction motor flux weakening control method based on optimized six-beat operation
  • Induction motor flux weakening control method based on optimized six-beat operation
  • Induction motor flux weakening control method based on optimized six-beat operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The schemes in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other examples obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The present invention is based on the traditional field-weakening control strategy based on voltage closed-loop, and the following first combines figure 1 The voltage closed-loop field weakening control strategy is described:

[0041] In the voltage closed-loop field weakening control strategy, the operating range of the induction motor can be divided into three areas: constant torque area, constant power area (field weakening area 1), and constant voltage area (field ...

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 provides an induction motor flux weakening control method based on optimized six-beat operation, and belongs to the technical field of motor control. The control method comprises the following steps: firstly, a voltage given value in a flux weakening controller to be 2Udc / piis set so as to ensure that the system can reach a six-beat operation mode, and the frequency of a feedback current resonant filteris set to be a larger value between omega * c and 6 * omega s; when the rotating speed exceeds the rated rotating speed, the motor enters a flux weakening area; the inverter outputs six-beat voltage; the six-beat voltage causes six-time harmonic generation of current, feedback current with six-time harmonic passes through a resonance filter and then is subtracted from a given value to enter a complex vector current regulator, the current regulator generates given voltage, and inverter trigger pulse is generated through an SVPWM modulation strategy to control a motor to operate in the flux weakening area. The method is applied to six-beat operation fluxweakening control of the induction motor.

Description

technical field [0001] The invention relates to a field-weakening control method of an induction motor based on optimized six-beat operation, and belongs to the technical field of motor control. Background technique [0002] With the wide application and continuous development of vector control in the field of AC motor speed control systems, AC motors have been significantly improved in terms of drive capability, dynamic response, speed range and accuracy, and therefore gradually replaced DC speed control systems. It is used in various industrial applications including household appliances, elevator traction, automotive machine tools, etc. At the same time, especially in high-performance industrial control applications, such as electric vehicles, CNC machine tool spindle drives, and electric locomotives, the requirements for high precision, high efficiency, and high quality have prompted the development of motor-driven variable frequency speed control systems in the directio...

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): H02P21/00H02P21/14H02P21/22H02P21/20H02P27/08
CPCH02P21/0089H02P21/14H02P21/22H02P21/20H02P27/085
Inventor 于泳张旭王勃张静徐殿国
Owner HARBIN INST OF TECH
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