Speed ​​Estimation Method of Sliding Mode Observer for Asynchronous Motor Based on Immune Algorithm

A technology of sliding mode observer and asynchronous motor, which is applied in the direction of control of generator, motor generator control, control of electromechanical brake, etc., and can solve problems such as steady-state error and chattering

Inactive Publication Date: 2017-09-22
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide an asynchronous motor sliding mode observer speed estimation method based on the immune algorithm, which solves the problem of chattering caused by steady-state errors in the prior art, and improves the robustness to system parameters and external disturbances sex

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  • Speed ​​Estimation Method of Sliding Mode Observer for Asynchronous Motor Based on Immune Algorithm
  • Speed ​​Estimation Method of Sliding Mode Observer for Asynchronous Motor Based on Immune Algorithm
  • Speed ​​Estimation Method of Sliding Mode Observer for Asynchronous Motor Based on Immune Algorithm

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Embodiment Construction

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] The speed estimation method of asynchronous motor sliding mode observer based on immune algorithm, the structural block diagram of sliding mode observer speed estimation based on immune algorithm is as follows figure 1 As shown, it includes the current calculation module, the flux linkage calculation module, the sliding mode function, and the speed estimation module. The input is the stator current and the stator voltage, and the output is the motor speed. The specific working process is as follows:

[0061] Step 1. Establish the mathematical model of the asynchronous motor through the stator current equation and the rotor flux equation of the asynchronous motor:

[0062]

[0063]

[0064] Among them, L r , L s , L m are rotor inductance, stator inductance and mutual inductance between stator and rotor, R r , R s are rotor r...

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Abstract

The invention discloses a method for estimating the rotational speed of an asynchronous motor sliding mode observer based on an immune algorithm, which is specifically implemented according to the following steps: step 1, establishing a mathematical model of an asynchronous motor through the stator current equation of the asynchronous motor and the rotor flux equation; step 2, according to step 1 Select the sliding mode function for the mathematical model of the asynchronous motor established in ; step 3, estimate the rotational speed of the asynchronous motor through the sliding mode function obtained in step 2. In the present invention, by replacing the sliding mode coefficient γo of the sliding mode observer of the asynchronous motor with the parameters adjusted by the immune algorithm, the online adjustment of the rotational speed of the asynchronous motor is realized, and finally the vibration caused by the introduction of the sliding mode observer of the asynchronous motor is reduced It improves the robustness to system parameters and external disturbances.

Description

technical field [0001] The invention belongs to the technical field of asynchronous motor control, and in particular relates to a method for estimating a rotational speed of an asynchronous motor sliding mode observer based on an immune algorithm. Background technique [0002] In the field of modern motor control technology, asynchronous motor vector control technology has been widely used. Since the use of the speed sensor destroys the advantages of simple structure, reliability, low cost and convenient maintenance of the asynchronous motor, it also limits its application range and reduces the robustness of the system. Therefore, the speed sensorless control has not only become a modern AC drive control It is an important research direction of technology, and it is also a key technology for researching high-performance general-purpose frequency converters. At present, researchers have proposed many implementation methods, such as Luenberger observer method, model reference...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/05H02P21/18H02P21/13
Inventor 伍文俊赵有乾尹忠刚钟彦儒
Owner XIAN UNIV OF TECH
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