Method of estimating revolving speed of sliding-mode observer of asynchronous motor based on immune algorithm

A technology of sliding mode observer and asynchronous motor, which is applied to the control of generators, motor generators, electromechanical brakes, etc., and can solve problems such as steady-state errors and chattering

Inactive Publication Date: 2015-07-01
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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  • Method of estimating revolving speed of sliding-mode observer of asynchronous motor based on immune algorithm
  • Method of estimating revolving speed of sliding-mode observer of asynchronous motor based on immune algorithm
  • Method of estimating revolving speed of sliding-mode observer of asynchronous motor based on immune algorithm

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[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] i sα · ...

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Abstract

The invention discloses a method of estimating the revolving speed of a sliding-mode observer of an asynchronous motor based on an immune algorithm. The method comprises the following specific steps: step 1, building a mathematic model of the asynchronous motor through a stator current equation of the asynchronous motor and a rotor flux linkage equation; step 2, selecting a sliding-mode function according to the mathematic model of the asynchronous motor in the step 1; step 3, estimating the revolving speed of the asynchronous motor through the sliding-mode function in the step 2. According to the method provided by the invention, a sliding-mode parameter gamma[o] of the sliding-mode observer of the asynchronous motor can be replaced by a parameter: FORMULA set by an immune algorithm, therefore the online setting of the revolving speed of the asynchronous motor can be realized, the buffeting problem caused by the asynchronous motor caused by the sliding-mode observer can be finally reduced, and the robustness to system parameters and external interference can be improved.

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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IPC IPC(8): H02P21/14H02P21/13
Inventor 伍文俊赵有乾尹忠刚钟彦儒
Owner XIAN UNIV OF TECH
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