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Permanent magnet synchronous motor speed sensorless adaptive speed tracking control system and its design method

A speed sensorless, permanent magnet synchronous motor technology, applied in control systems, vector control systems, motor generator control, etc., can solve the problem of low speed control accuracy of permanent magnet synchronous motors

Active Publication Date: 2020-12-22
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

[0004] Aiming at the problem that the speed control accuracy of the permanent magnet synchronous motor with nonlinear uncertainty is not high, the present invention is based on adaptive nonlinear damping, constructs a robust adaptive observer to estimate the motor speed, and proposes a permanent magnet synchronous motor without The speed sensor adaptive speed tracking control system and its design method can be applied to the speed tracking control of permanent magnet synchronous motors with parameter perturbation or time-varying, unknown nonlinearity and external disturbances, without estimating the uncertain parameters of the system or the external environment. The disturbance can ensure that all dynamic signals of the closed-loop system are bounded. In addition, by adjusting the design parameters, the estimation error of the observer and the tracking error of the motor speed can converge to an arbitrarily small

Method used

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  • Permanent magnet synchronous motor speed sensorless adaptive speed tracking control system and its design method
  • Permanent magnet synchronous motor speed sensorless adaptive speed tracking control system and its design method
  • Permanent magnet synchronous motor speed sensorless adaptive speed tracking control system and its design method

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Embodiment Construction

[0073] The self-adaptive rotational speed tracking control system of the permanent magnet synchronous motor without speed sensor of the present invention comprises:

[0074] (1) High-gain controller U with nonlinear damping term d and U q

[0075]

[0076] Among them, y 1 =x 1 = i d ,y 2 =x 2 = i q and x 3 = ω m , is the motor speed ω m estimated value.

[0077] (2) Build a motor state estimator with an adaptive rate

[0078]

[0079] The adaptive parameter β adaptive rate is:

[0080] in,

[0081] k3 >0 is a design constant.

[0082]

[0083] The design method of the speed sensorless adaptive speed tracking control system of the permanent magnet synchronous motor of the present invention, the specific process is: the permanent magnet synchronous motor is placed in the d-q axis coordinate system of the stator flux linkage orientation, and the PMSM system voltage with uncertainty is considered equation:

[0084]

[0085] Among them, U d , ...

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Abstract

The invention relates to a permanent magnet synchronous motor speed sensorless adaptive speed tracking control system and its design method. Based on adaptive nonlinear damping, a robust adaptive observer is constructed to estimate the motor speed, which is applicable to the presence of parameter perturbation or time The speed tracking control of permanent magnet synchronous motor with variable, unknown nonlinearity and external disturbance does not need to estimate the uncertainty parameters of the system or external disturbance, and can ensure that all dynamic signals of the closed-loop system are bounded. In addition, by adjusting the design parameters, the observer's The estimation error and motor speed tracking error can converge to arbitrarily small.

Description

technical field [0001] The invention relates to the technical field of speed control of permanent magnet synchronous motors, in particular to a speed sensorless adaptive speed tracking control system of permanent magnet synchronous motors with nonlinear uncertainty and a design method thereof. Background technique [0002] Due to its excellent and efficient performance, permanent magnet synchronous motor (PMSM) is widely used in many practical systems such as wind power generation, robotics, electric vehicles, and aerospace, so it is of great significance to study PMSM. The speed control of PMSM has attracted the attention of many scholars, among which the control of uncertainties such as unknown or time-varying parameters and external disturbances and the realization of speed sensorless control are two main research directions, and many important researches have been achieved. results. [0003] Due to the nonlinear coupling between the stator current and the rotor speed, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/18
CPCH02P21/18
Inventor 杨强朱明蒋涛付克昌黄小燕袁建英
Owner CHENGDU UNIV OF INFORMATION TECH
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