Stator-flux oriented inverse decoupling control system of bearing-free asynchronous motor

A stator flux orientation, asynchronous motor technology, applied in control systems, vector control systems, motor generator control, etc., can solve problems such as impact

Inactive Publication Date: 2015-05-27
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a bearingless asynchronous motor stator flux oriented control inverse decoupling control system, using the stator flux oriented control to replace the traditional torque system rotor flux oriented control, the technical problem to be solved is to effectively avoid The influence of the rotor parameters on the ...

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  • Stator-flux oriented inverse decoupling control system of bearing-free asynchronous motor
  • Stator-flux oriented inverse decoupling control system of bearing-free asynchronous motor

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Embodiment Construction

[0031] In order to make the content of the present invention more obvious and understandable, the present invention will be described in detail below in conjunction with specific embodiments.

[0032] Core idea of ​​the present invention is:

[0033] 1) The bearingless asynchronous motor is a multivariable, nonlinear, and strongly coupled complex object, in which there are complex nonlinear electromagnetic coupling relationships; the inverse system method is a dynamic decoupling control method suitable for multivariable, complex nonlinear systems, Through the inverse system method, the cross-coupling relationship among the coupling variables inside the bearingless asynchronous motor can be realized;

[0034] 2) The stator flux linkage of the bearingless asynchronous motor torque system can be calculated in real time according to its stator voltage, current and stator resistance parameters, and is not affected by the variable rotor resistance parameters. Therefore, the use of ...

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Abstract

The invention discloses a stator-flux oriented inverse decoupling control system of a bearing-free asynchronous motor. The stator-flux oriented inverse decoupling control system comprises a stator-flux oriented original system, a stator-flux oriented inverse system and four regulators, wherein the four regulators comprises a rotation speed regulator, a flux regulator and two displacement regulators; the stator-flux oriented inverse system is connected in front of the stator-flux oriented original system in series, so that the system is decoupled into four linear subsystems comprising a first-order rotation speed subsystem, a first-order stator-flux subsystem and alpha and beta radial displacement second-order subsystems; the four linear subsystems are connected with the four regulators correspondingly; the four regulators are connected to the stator-flux oriented inverse system so as to form an enclosed loop control system. According to the system, on the basis of stator-flux oriented control of a torque system, the system of the bearing-free asynchronous motor is subjected to integral inverse system decoupling control, so that the control performance of the motor is effectively prevented from being affected by rotor parameters, and the motor running control performance is improved.

Description

technical field [0001] The invention relates to the technical field of AC motor drive and control, in particular to a high-performance dynamic decoupling control method and system for stator flux oriented control (SFOC) of a bearingless asynchronous motor. Background technique [0002] Bearingless motor is a new type of motor suitable for high-speed operation developed in recent years, and has broad application prospects in aerospace, material sealing transmission, advanced manufacturing and other fields. Bearingless asynchronous motor is a multivariable, nonlinear and strongly coupled complex control system, in which there is a complex nonlinear electromagnetic coupling relationship. To achieve its high-performance suspension operation control, the motor speed, flux linkage and two rotor diameters must be realized. The dynamic decoupling control between the displacement components; the inverse system method is an effective means for linear decoupling of multivariable and no...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P25/02
Inventor 卜文绍肖隽亚王晓红何方舟程相辉李自愿张海涛乔岩茹李晓强牛新闻吴贵芳徐兴元
Owner HENAN UNIV OF SCI & TECH
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