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Vector control method of permanent magnet synchronous motor based on global online heuristic dynamic programming

A technology of permanent magnet synchronous motor and dynamic programming, which is applied in motor generator control, vector control system, electronic commutation motor control, etc., and can solve problems such as torque ripple of permanent magnet synchronous motor

Active Publication Date: 2021-01-26
SOUTHEAST UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, after the traditional SMC control enters the sliding mode surface, there will be "chattering" phenomenon, and it is used in the current inner loop of the vector control system of the permanent magnet synchronous motor, which may easily cause the torque ripple of the permanent magnet synchronous motor

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  • Vector control method of permanent magnet synchronous motor based on global online heuristic dynamic programming
  • Vector control method of permanent magnet synchronous motor based on global online heuristic dynamic programming
  • Vector control method of permanent magnet synchronous motor based on global online heuristic dynamic programming

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Embodiment Construction

[0060] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0061] Based on the global online heuristic dynamic programming permanent magnet synchronous motor vector control method, its implementation specifically includes the following steps:

[0062] Step 1: Initialize the target network learning rate, evaluation network learning rate, and single neuron PI algorithm parameters of the single neuron global online heuristic dynamic programming algorithm, and design an external reinforcement learning signal according to the tracking error of the system;

[0063] Build a permanent ...

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Abstract

The invention discloses a vector control method for a permanent magnet synchronous motor based on global online heuristic dynamic programming. The current loop adopts a sliding mode variable structure controller with improved approach rate, which reduces the current chattering phenomenon and suppresses the permanent magnet synchronous motor. Torque pulsation, speed loop adopts a single neuron global online heuristic dynamic programming algorithm to evaluate the parameter changes of permanent magnet synchronous motor, and adjust the discount factor K adaptively. The difference between the rotation speed and the actual rotation speed is zero as the optimization target, so as to design the reinforcement learning signal, and generate an internal reinforcement learning signal through the target network to improve the learning ability of the system, and adjust the reference value of the q-axis current through continuous online learning, Compensate for changes in the parameters of the permanent magnet synchronous motor, thereby enhancing the speed and anti-interference ability of the permanent magnet synchronous motor. The method proposed by the invention has strong pertinence and practicability for the permanent magnet synchronous motor vector control system.

Description

technical field [0001] The invention relates to the technical field of intelligent control of permanent magnet synchronous motors, in particular to a vector control method for permanent magnet synchronous motors based on global online heuristic dynamic programming. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of high power density, simple structure, small size, and strong reliability. It is widely used in the fields of numerical control machine tools, aerospace and robotic manipulator control. The permanent magnet synchronous motor itself is also a strongly coupled and nonlinear control system, and there are problems of parameter changes and external disturbances. Therefore, reliable control methods for permanent magnet synchronous motors have always been the focus of research at home and abroad. In recent years, there have been many nonlinear control methods for permanent magnet synchronous motors. Foreign S.Barkat scholars (S....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/18H02P21/22H02P6/10
CPCH02P6/10H02P21/0007H02P21/0014H02P21/0025H02P21/18H02P21/22
Inventor 余海涛王琦
Owner SOUTHEAST UNIV
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