Asynchronous machine control method based on linkage compensation

A technology for asynchronous motors and control methods, applied in motor control, AC motor control, control systems, etc., can solve problems such as motor parameter deviation, control performance degradation, and slow torque response, achieving small motor output torque fluctuations, Improved response speed and high control performance

Active Publication Date: 2017-06-13
XIANGTAN ELECTRIC MFG CORP LTD
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its low-speed performance is poor, and the torque response is slow
The control performance of vector control is good, but it depends heavily on the motor parameters. In the application situation where the motor temperature changes greatly, the motor parameters will deviate g...

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
  • Asynchronous machine control method based on linkage compensation
  • Asynchronous machine control method based on linkage compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] With reference to accompanying drawing, a kind of asynchronous motor control method based on flux linkage compensation, its steps are:

[0021] Step 1. Input the DC voltage, motor current, motor voltage, and motor angular frequency to the flux torque observer 3 through the vector transformation 6, and the flux torque observer 3 calculates according to the asynchronous motor 8 static coordinate system model and the above input parameters The torque of the motor and the amplitude of the air gap flux linkage are obtained, and the voltage of the motor is reconstructed according to the DC voltage and the switch state of the inverter;

[0022] Step 2. Send the calculated actual motor torque and air-gap flux linkage amplitude to the torque regulator 1 and the flux linkage regulator 2. After limiting the amplitude 4, the slip frequency given value and 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

The present invention relates to an asynchronous machine control method based on linkage compensation. The method comprises: the step 1, calculating a motor torque and an air gap linkage amplitude value; the step 2, respectively obtaining a slip frequency given value and a voltage compensation value after amplitude limiting; the step 3, obtaining a basic output voltage given value of an inverter on a V/F curve according to the output frequency given value of the inverter; the step 4, calculating the output voltage given value of the inverter; and the step 5, controlling the switching state of an IGBT through a modulation unit through the inverter, and outputting the output voltage given value and the frequency given value to a motor. The asynchronous machine control method based on linkage compensation employs a flux linkage amplitude regulator to combine a V/F control curve to greatly improve a motor output torque response speed; the flux linkage amplitude regulator uses a flux linkage amplitude value and does not use a decoupled flux linkage amplitude value in a vector control mode so as to greatly reduce the dependence on the motor parameters and improve the control performance; and moreover, the asynchronous machine control method based on linkage compensation employs a torque regulator to combine the motor rotation speed to realize motor slip control and reduce the motor output torque fluctuation.

Description

technical field [0001] The invention relates to the field of motor control, in particular to an asynchronous motor control method based on flux linkage compensation. Background technique [0002] Energy saving, environmental protection and sustainable development have become two major themes in the world today. In order to cope with the increasingly severe energy consumption, all countries are adjusting their energy policies. According to statistics, 60% of the total load of my country's power grid is induction motors, and most of the motors run below the rated load, and a large amount of electric energy is wasted. In addition, high-power asynchronous motors have been widely used in various construction machinery. The combination of generators and electric motors is used to replace gasoline and diesel engines, complex gear boxes are removed, and the low-speed hard characteristics of the system are improved. is a big trend. To this end, countries are vigorously promoting a...

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): H02P23/08H02P27/06
CPCH02P23/08H02P27/047H02P27/06H02P2207/01
Inventor 黄兴黄洁萍蔡罗强
Owner XIANGTAN ELECTRIC MFG CORP LTD
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