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Sliding mode control system of permanent magnet synchronous motor based on singular perturbation theory and modeling method thereof

A technology of permanent magnet synchronous motor and singular perturbation theory, which is applied in motor generator control, control system, motor control, etc., can solve the problems of parameter perturbation and external disturbance, weak robustness and slow system response speed.

Active Publication Date: 2019-07-12
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Although the traditional PID double closed-loop control method can make the servo system obtain a certain control accuracy, the response speed of the system is slow, and the robustness to parameter perturbation and external disturbance is not strong.

Method used

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  • Sliding mode control system of permanent magnet synchronous motor based on singular perturbation theory and modeling method thereof
  • Sliding mode control system of permanent magnet synchronous motor based on singular perturbation theory and modeling method thereof
  • Sliding mode control system of permanent magnet synchronous motor based on singular perturbation theory and modeling method thereof

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Embodiment Construction

[0113] Below in conjunction with accompanying drawing and specific embodiment, 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 the present application.

[0114] A sliding mode control system of permanent magnet synchronous motor based on singular perturbation theory, such as figure 1 As shown, it includes angular velocity error module, slow subsystem sliding mode control law module SMC-S, fast subsystem sliding mode control law module SMC-F, flux linkage rotation space angle Module, current transformer module, three-phase static symmetrical ABC coordinate system to two-phase synchronous rotation orthogonal dq coordin...

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Abstract

The invention discloses a sliding mode control system of a permanent magnet synchronous motor based on a singular perturbation theory and a modeling method thereof. A motor mathematical model is decomposed based on a singular perturbation theory, and design of a controller is performed for a slowly varying time subsystem and a quickly varying time subsystem in different time scales to construct acomposite controller; an Euclidean norm is considered to the design of a sliding mode controller to replace a symbol function to weaken a buffeting phenomenon so as to form a sliding mode control system of a permanent magnet synchronous motor based on a singular perturbation theory, and finally, the stability of a closed-loop system is analyzed by applying the Lyapunov stability theory. The control system has high robustness and can achieve accurate tracking for given angular speed signals.

Description

technical field [0001] The invention relates to a sliding mode control system and modeling method of a permanent magnet synchronous motor based on a singular perturbation theory, and belongs to the technical field of permanent magnet synchronous motor control. Background technique [0002] Compared with DC motors, three-phase AC permanent magnet synchronous motors are widely used in high-performance servo drives with fast response, wide speed range and accurate positioning due to their high power factor, small size, light weight and simple structure. system. However, the mathematical model of permanent magnet synchronous motor is a nonlinear, high-order and strongly coupled multivariable system, and its analysis and solution are quite complicated, so it needs to be simplified and a new control method should be studied. [0003] It can be seen that the design of the permanent magnet synchronous motor servo control system plays a vital role in improving the dynamic performanc...

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Application Information

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IPC IPC(8): H02P21/00H02P6/34
CPCH02P6/34H02P21/0007H02P2205/07
Inventor 杨春雨周林娜刘晓敏王浩宇车志远
Owner CHINA UNIV OF MINING & TECH
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