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A sliding mode control system for permanent magnet linear synchronous motor

A permanent magnet linear synchronization and control system technology, applied in the control system, vector control system, motor generator control and other directions, can solve the problems of slow dynamic response speed and poor control accuracy, and achieve strong robustness, accurate tracking, The effect of chattering improvement

Active Publication Date: 2019-03-19
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] At present, the most commonly used control strategy is PID closed-loop control. This traditional control system has slow dynamic response and poor control accuracy.

Method used

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  • A sliding mode control system for permanent magnet linear synchronous motor
  • A sliding mode control system for permanent magnet linear synchronous motor
  • A sliding mode control system for permanent magnet linear synchronous motor

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Embodiment Construction

[0051] Below in conjunction with accompanying drawing and specific implementation example, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of this application.

[0052] A permanent magnet linear synchronous motor sliding mode control system, such as figure 2 As shown, including displacement error module, extended state observer, sliding mode surface and sliding mode control law module, among them:

[0053] The displacement error module will give the displacement p * Actual displacement with permanent magnet linear synchronous motor x 1 Subtract to get the displacement error e 1 , and send it to the sliding surface; ...

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Abstract

The invention discloses a permanent magnet linear synchronous motor slip form control system based on a linear expansion state observer, and belongs to the technical field of linear motor control. The system comprises the following steps that: firstly, establishing the dynamic equation of a permanent magnet linear synchronous motor on a two-phase synchronous rotation orthogonal coordinate system; secondly, simplifying the dynamic equation into a special two-order integral series type mathematical model; thirdly, designing the linear expansion state observer to obtain a disturbance estimated value, and considering the estimated value in the design of a slip form control law to eliminate a chattering phenomenon; and finally, applying a Lyapunov stability theory to analyze the stability of the system. The system has the most important characteristics that the state and the disturbance of the system can be accurately estimated by the linear expansion state observer. In addition, the control system is high in robustness, and a given displacement signal can be accurately tracked. In addition, the chattering phenomenon of slip form control can be greatly improved so as to be suitable for designing the permanent magnet linear synchronous motor servo control system.

Description

technical field [0001] The invention relates to a permanent magnet linear synchronous motor sliding mode control system, which belongs to the technical field of linear motor control. Background technique [0002] Compared with rotating motors, three-phase AC permanent magnet linear synchronous motors have the characteristics of simple structure, strong overload capacity and large feed acceleration, so they are widely used in high-speed, high-acceleration and high-precision occasions. In addition, linear motors can produce linear motion without intermediate transmission devices, thus replacing the traditional "rotary motor + roller screw" transmission form. However, the dynamic model of the permanent magnet linear synchronous motor is a nonlinear, high-order and strongly coupled multivariable system, and its analysis and control are quite complicated. It needs to be simplified and a new control method should be studied. [0003] It can be seen that the design of the permanen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/18H02P25/064
CPCH02P21/0007H02P21/13H02P25/06
Inventor 杨春雨车志远周林娜许瑞琪马婷婷李恒
Owner CHINA UNIV OF MINING & TECH
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