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Self-disturbance control method for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and active disturbance rejection control, which is applied in motor control, motor generator control, electronic commutation motor control, etc., and can solve problems such as slow response and poor anti-disturbance ability

Active Publication Date: 2019-11-08
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of slow response, system chattering and poor anti-interference ability of the permanent magnet synchronous motor control system in the prior art, and proposes an active disturbance rejection control method for permanent magnet synchronous motors

Method used

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  • Self-disturbance control method for permanent magnet synchronous motor
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  • Self-disturbance control method for permanent magnet synchronous motor

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Embodiment Construction

[0058] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention will be further described in detail below through a control example of a permanent magnet synchronous motor.

[0059] Such as figure 1 As shown, the present invention discloses a vector control method for permanent magnet synchronous motors with active disturbance rejection control, which is suitable for vector control of permanent magnet synchronous motors. The input terminal of the permanent magnet synchronous motor control system receives a given speed signal ω * and the actual speed signal ω of the motor, the two signals are adjusted by the new ADRC to generate a given q-axis current i q * , on the other hand, the three-phase stator current i is obtained by current sampling a , i b and i c , through the Clarke transformation, it is transformed into the current in the α-β two-phase stationary coordinate system, and then tr...

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Abstract

The invention provides a self-disturbance control method for a permanent magnet synchronous motor, and belongs to the technical field of permanent magnet synchronous motor control. The method comprises the steps of: designing a hyperbolic tangent function expansion state observer, adopting the saturation characteristics itself of the hyperbolic tangent function to effectively suppress a differential peak appearing in a traditional expansion state observer so as to improve the system control performance. The non-linear feedback control rate based on the new adaptive sliding mode control is proposed which is characterized by designing a new adaptive shifting index approach law which introduces a first-order norm of the state variable, and an approaching speed is adaptively regulated according to the distance of the state variable from the balance point to reduce the dependence of the self-disturbance control on the parameter robustness so as to achieve the high-precision and high robustness control of a permanent magnet synchronous motor. When the system is disturbed and a load fluctuates, the rotation speed is rapidly tracked, the response speed of the system is improved, the systemovershoot and the steady state static difference are reduced, and the system robustness is greatly enhanced.

Description

technical field [0001] The invention belongs to the field of permanent magnet synchronous motor control, and in particular relates to a permanent magnet synchronous motor self-disturbance rejection vector control method. Background technique [0002] Compared with ordinary asynchronous motors, permanent magnet synchronous motors have the characteristics of small size, simple structure, large torque inertia ratio, and high reliability. Therefore, they are widely used in modern AC speed control systems, especially in robots, aviation ,, CNC machine tools and other occasions that require high control performance. Most permanent magnet motor speed control systems use PI control strategies for regulation. However, permanent magnet motors are typical nonlinear multi-element coupling systems, and their performance is usually affected by unknown loads, friction, and nonlinear magnetic fields. For such a complex system, it is difficult for the controller to meet the requirements of...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/05
CPCH02P21/0003H02P21/0007H02P21/0017H02P21/0085H02P21/05H02P2207/05
Inventor 许波张磊姬伟沈晓康
Owner JIANGSU UNIV
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