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Permanent magnet brushless direct current motor position servo system based on composite position controller

A permanent magnet brushless DC, motor position technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as limiting sliding mode control applications, chattering, etc., to improve dynamic quality and reduce chattering phenomenon, the effect of shortening the approach time

Pending Publication Date: 2021-04-02
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discontinuous control effect of the sliding mode control law will cause chattering, which limits the application of sliding mode control in practical systems.

Method used

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  • Permanent magnet brushless direct current motor position servo system based on composite position controller
  • Permanent magnet brushless direct current motor position servo system based on composite position controller
  • Permanent magnet brushless direct current motor position servo system based on composite position controller

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Embodiment Construction

[0057]The technical solutions in the embodiments of the present invention will be described in detail below in connection with the drawings of the embodiments of the present invention. The described embodiments are merely a part of the embodiments of the invention.

[0058]The present invention solves the technical solution of the above technical problems:

[0059]The mathematical model of the permanent magnet brushless DC motor of the present invention is:

[0060]

[0061]The θ, W, I, and respectively are position signals, speed signals, motor stator currents, and voltage; j is rotational inertia; B is a viscous friction coefficient; L is a stator inductor; R is a stator resistance;Take a torque coefficient; NpMagnetic polarity logarithmic; ψfRotor magnetic chain; TLLoad torque; Ke= NpψfAlso torque coefficient.

[0062]Typically, in order to facilitate the design of the composite position controller for the permanent magnet brushless DC motor, it can be expressed as the following form:

[0063]

[006...

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Abstract

The invention provides a permanent magnet brushless direct current motor position servo system based on a composite position controller. The permanent magnet brushless direct current motor position servo system comprises a composite position controller module, a PI control module, a driving circuit module, a current sampling module, a permanent magnet brushless direct current motor and a positiondetection and calculation module, wherein the composite position controller module is a composite controller composed of a sliding mode feedback control part based on an exponential reaching law and an interference estimation and compensation part based on an extended state observer. Compared with a traditional linear control method, the method of the invention can effectively reduce system buffeting and improve the anti-interference performance of the system while ensuring the convergence rate, and meet the application requirements of the permanent magnet brushless direct current motor position servo system in the field of high performance.

Description

Technical field[0001]The present invention belongs to the control method of a permanent magnet brushless DC motor, in particular a permanent magnet brushless DC motor position servo system controlled by an expanded state observer and a sliding mode.Background technique[0002]Permanent magnet brushless DC motor is a new type of DC motor developed with the rapid development of power electronic technology, manufacturing and new materials, because it has simple structure, reliable operation, convenient maintenance, high efficiency, no incentive magnetic loss and Speed ​​speed performance is good, which is widely used in aerospace, household appliances, instrumentation, chemical, medical equipment and other industrial fields.[0003]At present, the permanent magnet brushless DC motor generally adopts the connection of the PID control and the vector control structure, but since the motor is affected by various interferences such as external electromagnetic interference, load change, friction...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/13H02P21/18H02P21/05
CPCH02P21/0007H02P21/13H02P21/18H02P21/05H02P2203/03H02P2203/05
Inventor 王会明万谦王雪闯陈晓雷唐贤伦李锐
Owner CHONGQING UNIV OF POSTS & TELECOMM