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Brushless double-feed-motor chaotic analysis method based on largest Lyapunov exponent

A doubly-fed motor and analysis method technology, applied in the control of generators, motor generator control, electronic commutation motor control, etc., can solve problems such as irregular torque, irregular motor movement, intermittent oscillation of speed, etc.

Inactive Publication Date: 2016-04-06
GUANGDONG UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Although the motor control strategy is continuously optimized and improved, there are still irregular motions in the actual operation of the motor, such as irregular electromagnetic noise, irregular torque, and intermittent oscillation of the speed.

Method used

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  • Brushless double-feed-motor chaotic analysis method based on largest Lyapunov exponent
  • Brushless double-feed-motor chaotic analysis method based on largest Lyapunov exponent
  • Brushless double-feed-motor chaotic analysis method based on largest Lyapunov exponent

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Embodiment 1

[0072] A method for analyzing the chaos of a brushless doubly-fed motor based on the maximum Lyapunov exponent, comprising the following steps:

[0073] S1: Based on the d-q axis mathematical model of the brushless double-fed motor, derive the nonlinear differential equation;

[0074] S2: Take the reciprocal of the rotor motion time constant as the control parameter of the motor system, and construct the chaos model of the brushless doubly-fed motor according to the actual motor parameters;

[0075] S3: By calculating the maximum Lyapunov exponent of the chaotic model, analyze the parameter range corresponding to the chaotic phenomenon of the motor.

[0076] The process of step S1 is as follows:

[0077] 21) The voltage equation of each winding of BDFM in the rotor speed d-q axis synchronous coordinate system is:

[0078]

[0079]

[0080]

[0081] where u dp , u qp , u dc , u qc , u dr , u qr d and q axis voltage components of power winding, control winding a...

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Abstract

The invention provides a brushless double-feed-motor chaotic analysis method based on the largest Lyapunov exponent. The method is characterized by deriving a non-linear differential equation based on a brushless double-feed-motor d-q shaft mathematic model; taking a reciprocal of a rotor motion time constant as a control parameter of a motor system; according to an actual motor parameter, constructing a chaotic model of a brushless double-feed motor; through calculating the largest Lyapunov exponent of the chaotic model, analyzing a corresponding parameter scope when the motor generates a chaotic phenomenon. Matlab modeling and simulation are used and a parameter condition of the brushless double-feed motor entering into a chaotic motion state is demonstrated.

Description

technical field [0001] The invention relates to the field of chaotic phenomenon analysis of a brushless doubly-fed motor (BDFM), in particular to a method for analyzing the chaos of a brushless doubly-fed motor based on the maximum Lyapunov exponent. Background technique [0002] Brushless doubly-fed machine (BDFM) is an asynchronous AC excitation synchronous motor with two sets of windings for power and control on the stator. In structure, it is similar to the stator and rotor windings of wound asynchronous motors. Due to its high reliability and low maintenance cost, it shows obvious advantages in the harsh wind farm environment. In recent years, the ontology research and control strategy research on BDFM are in the ascendant, and control strategies such as scalar control, vector control and direct torque control have gained more attention. Although the motor control strategy is continuously optimized and improved, there are still irregular motions in the actual operation...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/16H02P21/20
CPCH02P21/0021
Inventor 陈集思杨俊华林卓胜陈俊宏
Owner GUANGDONG UNIV OF TECH
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