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An Adaptive Sliding Mode Control Method for Permanent Magnet Synchronous Motor Based on Dynamic Surface

A permanent magnet synchronous motor, adaptive sliding mode technology, used in motor generator control, motor control, AC motor control and other directions

Active Publication Date: 2020-08-11
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in order to meet the high-quality control requirements of the motor, and considering the safety of the motor and the actual process requirements, time lag, chaos and parameter uncertainty have become important factors that cannot be ignored in the design of the system controller.

Method used

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  • An Adaptive Sliding Mode Control Method for Permanent Magnet Synchronous Motor Based on Dynamic Surface
  • An Adaptive Sliding Mode Control Method for Permanent Magnet Synchronous Motor Based on Dynamic Surface
  • An Adaptive Sliding Mode Control Method for Permanent Magnet Synchronous Motor Based on Dynamic Surface

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Embodiment Construction

[0089] The present invention will be further described below in conjunction with accompanying drawing.

[0090] Control method provided by the invention comprises the steps:

[0091] Step 1. Establish a standardized model of permanent magnet synchronous motor;

[0092] The mathematical model of permanent magnet synchronous motor can be written as

[0093]

[0094] in Indicates the d-axis current (A), Indicates the q-axis current (A), Indicates the speed (rad / s), Indicates time(s), Indicates the d-axis voltage (V), Indicates the q-axis voltage (V), Indicates load torque (Nm), R indicates stator coil resistance (Ω), L d Indicates the d-axis winding inductance (H), L q Indicates the q-axis winding inductance (H), ψ r Indicates permanent magnet flux (Wb), B indicates viscous damping coefficient (N / rad / s), J indicates inertia pole moment (kgm 2 ), n p Indicates the number of pole pairs.

[0095] By solving the permanent magnet synchronous motor control proble...

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Abstract

An adaptive sliding-mode control method of a permanent magnet synchronous motor is based on dynamic surface technology. The method comprises: establishing a standardized model of the motor with time-varying delay, and applying a single-weight RBF (Radial Basis Function) neural network with approximation ability for coping with unknown disturbances and unknown system dynamics to controller design. An adaptive sliding-mode controller is then designed in the framework of backstepping, and a first-order low-pass filter may be introduced to handle the problem of derivative explosion associated with traditional backstopping control. A rapid terminal sliding-mode surface may be adopted to further improve tracking accuracy and obtain better performance. Finally an adaptive sliding-mode control method may be proposed in the case of merging the rapid terminal sliding-mode surface, the first-order low-pass filter and the RBF neural network.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to an adaptive sliding mode control method for a permanent magnet synchronous motor based on a dynamic surface. Background technique [0002] Permanent magnet synchronous motors are applied to robots and machine tool control systems because of their advantages such as energy saving, high efficiency, small size, simple structure and long life. However, when they are affected by uncertain factors such as system parameter disturbances and external disturbances It exhibits rich dynamic phenomena, such as limit cycle and chaotic behavior. Among them, chaotic behavior will directly destroy the stability and reliability of the entire motor system. Regarding the control methods of permanent magnet synchronous motors, most previous scholars have based on precise dynamic models, and rarely considered the influence of parameter changes, uncertain bounded disturbances and unknown gains o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/14H02P25/022
CPCH02P21/0017H02P21/14H02P25/024H02P2207/05H02P6/34H02P21/0007H02P25/022
Inventor 吴松励罗绍华刘畅曹苏群
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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