Non-linear disturbance observer-based sensorless control method and system for permanent magnet synchronous motor

A technology for permanent magnet synchronous motors and disturbance observers, applied in control systems, motor control, vector control systems, etc., can solve the problems of complex structure, complex design, and difficult engineering application of observers, so as to improve system robustness and Effects of dynamic response performance, suppression of parameter changes, and improvement of robustness

Pending Publication Date: 2021-06-25
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The current improvement strategy is the extended sliding mode observer. This method can directly observe the back electromotive force of the motor and avoid the system chattering problem caused by extracting the back electromotive force from the switch. However, this method makes the observer structure extremely complicated; high The first-order sliding mode observer, this method can realize the motor rotor position and speed estimation, but the design of this method is quite complicated, and the engineering application is difficult

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  • Non-linear disturbance observer-based sensorless control method and system for permanent magnet synchronous motor
  • Non-linear disturbance observer-based sensorless control method and system for permanent magnet synchronous motor
  • Non-linear disturbance observer-based sensorless control method and system for permanent magnet synchronous motor

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Embodiment Construction

[0062] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0063] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the comp...

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Abstract

The invention discloses a non-linear disturbance observer-based sensorless control method and system for a permanent magnet synchronous motor, belonging to the field of control over permanent magnet synchronous motors. The method comprises the following steps: acquiring estimated values e(alpha) and e(beta) of back electromotive force of a permanent magnet synchronous motor by combining current and voltage under an alpha-beta coordinate system of the permanent magnet synchronous motor with a total disturbance value; and acquiring a rotor position angle and a speed of the permanent magnet synchronous motor according to the estimated values e(alpha) and e(beta) of the back electromotive force of the permanent magnet synchronous motor; According to the invention, load and external disturbance are observed and compensated, the anti-interference capability of a motor speed regulation system is improved, and rotor position observation precision is further improved by introducing an adaptive law.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a sensorless control method and system for a permanent magnet synchronous motor based on a nonlinear disturbance observer. Background technique [0002] Permanent magnet synchronous motors are widely used in industry because of their advantages. To improve the robust performance of the permanent magnet synchronous motor speed control system, it is usually improved from the speed sensor. The speed and position information of traditional vector control systems are usually obtained through mechanical sensors. This method suffers from high cost, poor reliability, and installation defects. Therefore, the research on the control algorithm of the position sensorless permanent magnet synchronous motor has become a research hotspot. [0003] At present, the commonly used sensorless control algorithms mainly include: back EMF method, model reference adaptive met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/18H02P21/22H02P21/24H02P25/022
CPCH02P21/0003H02P21/0007H02P21/13H02P25/022H02P2207/05H02P21/18H02P21/22H02P21/24
Inventor 高晗璎徐阳张文
Owner HARBIN UNIV OF SCI & TECH
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