Asynchronous motor multi-parameter decoupling online identification method

An asynchronous motor and identification method technology, applied in the control of generators, motor control, motor-generator control, etc., can solve the problems of influence, poor universality, unproven stability, etc.

Active Publication Date: 2020-01-03
重庆中涪科瑞工业技术研究院有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The second difficult problem is the multi-parameter parallel identification problem
[0010] (1) This method is still affected by the rotor resistance, and does not consider further identification of the rotor resistance;
[0011] (2) Although robust to stator resistance, it will still be affected;
[0012] (3) Only consider the stability of the system under speed identification, and do not consider the stability of the system under multi-parameter identification
[0015] (1) The method is affected by the stator resistance;
[0016] (2) It is difficult to extract the cogging harmonic signal, and it is relatively related to the structure of the motor, and the universality is poor;
[0017] (3) The stability of the method at very low / zero speed has not been demonstrated
[0018] In summary, in the current method, there is no literature that comprehensively considers the multi-parameter identification problem and the system stability problem at extremely low speed / zero speed

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 motor multi-parameter decoupling online identification method
  • Asynchronous motor multi-parameter decoupling online identification method
  • Asynchronous motor multi-parameter decoupling online identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0083] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0084] Unless otherwise specified in the following implementation examples, the technical means used are conventional means well known to those skilled in the art.

[0085] A multi-parameter decoupling online identification method for an asynchronous motor includes the following steps:

[0086] S1: Build a parallel identification algorithm for asynchronous motor speed and stator resistance, explore the coupling relationship between speed and stator resistance, use Lyapunov's second law to design the adaptive law of s...

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 the technical field of asynchronous motors, in particular to an asynchronous motor multi-parameter decoupling online identification method. The method comprises the followingsteps: S1, constructing a parallel identification algorithm of the speed and the stator resistance of an asynchronous motor, exploring a coupling relationship between the speed and the stator resistance, designing an adaptive law of the speed and the stator resistance by utilizing a Lyapunov second law, and performing parallel identification on the speed and the stator resistance based on MRAS; and S2, constructing an identification strategy of the rotor resistance of the asynchronous motor, and establishing an MRAS system reference model and an MRAS system adjustable model of the rotor resistance based on a small signal injection mode. By designing the speed and stator resistance adaptive law, the stability of parallel identification of the speed and the stator resistance at an ultra-lowspeed / zero speed can be ensured, and the speed and the rotor resistance can be identified in parallel without any influence on the output torque.

Description

technical field [0001] The invention relates to the technical field of asynchronous motors, in particular to an online identification method for multi-parameter decoupling of asynchronous motors. Background technique [0002] In recent years, sensorless control of asynchronous motors has been widely used in industrial production because of its advantages of low maintenance cost, simple structure and strong system robustness. In the sensorless control technology of asynchronous motors, the stability of the control system at extremely low speed / zero speed and the online parallel identification research of multiple parameters are recognized as difficult problems in the academic circle. [0003] In some special applications, such as the elevator control system, the pure electric braking system of the subway, etc., the control performance of the motor at extremely low speed / zero speed is particularly important. However, in many speed sensorless observation methods, the motor can...

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): H02P21/14H02P21/18
CPCH02P21/14H02P2207/01H02P21/18
Inventor 方晓春钟志宏
Owner 重庆中涪科瑞工业技术研究院有限公司
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