Method for removing chattering of sliding mode control of permanent magnet synchronous motor

A permanent magnet synchronous motor, permanent magnet synchronous technology, applied in the direction of motor generator control, electronic commutation motor control, single motor speed/torque control, etc., can solve problems such as changes and uncertain external disturbances

Inactive Publication Date: 2010-10-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, the parameters in the motor dynamic model are changed when they are affected by the environment

Method used

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  • Method for removing chattering of sliding mode control of permanent magnet synchronous motor
  • Method for removing chattering of sliding mode control of permanent magnet synchronous motor
  • Method for removing chattering of sliding mode control of permanent magnet synchronous motor

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Embodiment Construction

[0038] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0039] According to Embodiment 1 of the present invention, such as figure 1 As shown, a debounce method of sliding mode control of permanent magnet synchronous motor is provided, which is used for speed control of synchronous motor. In order to illustrate the operating principle of the present invention, the nonlinear model of the permanent magnet synchronous motor is:

[0040]

[0041] Among them, k i (1≤i≤10) is the motor parameter coefficient, x=[x 1 , x 2 , x 3 ] T =[ω,i d , i q ]T is the state variable of the motor, u=[u 1 , u 2 ] T =[u d , u q ] T is the control input signal.

[0042] Since the permanent magnet synchronous motor is a multi-input multi-output nonlinear dynamic system, assuming that all state variables are measurable, the sliding mode variable s is selected as the output of the system, and the direct axis current x 2 As the ...

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Abstract

The invention relates to a method for removing chattering of sliding mode control of a permanent magnet synchronous motor, which can realize the removal of the chattering phenomenon of the sliding mode control of the permanent magnet synchronous motor. The method has the technical characteristics that: 1, a nonlinear mathematical model of the permanent magnet synchronous motor is established; 2, the nonlinear mathematical model is subjected to decoupling by adopting feedback linearization theory of a nonlinear system; and 3, a corresponding high-order sliding mode controller is designed on the basis of decoupling control respectively. By adopting a high-order sliding mode control algorithm with a differentiator, although indeterminate parameters, external interference, and other factors are present in the system, a robust controller aiming at a multi-input multi-output nonlinear permanent magnet synchronous motor is designed. The controller has the advantages of removing the chattering of the traditional sliding modes, having control accuracy and strong robustness of the traditional sliding modes, and making the control rules not limited by the degree of correlation of the system.

Description

technical field [0001] The invention relates to a vibration elimination method of sliding mode control of a permanent magnet synchronous motor, which can realize the elimination of the vibration phenomenon of the sliding mode control of the permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor has the advantages of compact structure, high power density, high air gap flux and high torque inertia ratio. Compared with wound synchronous motor, it has no excitation coil, slip ring and brush, high reliability and easy maintenance. Simple; outperforms brushless DC motors and induction servo motors in some technical performances. Therefore, it is widely used in high-performance servo drive systems. [0003] However, the permanent magnet synchronous motor is a nonlinear system, which contains the product term of the angular velocity and the AC-direct axis current. To obtain accurate control performance, it must be decoupled. Feedback li...

Claims

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Application Information

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IPC IPC(8): H02P6/08H02P21/00
Inventor 皇甫宜耿刘卫国马瑞卿宋受俊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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