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Novel reaching law based bearingless asynchronous motor sliding-mode control method

A technology of asynchronous motor and control method, which is applied in motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of chattering, poor convergence performance, poor control performance, etc.

Inactive Publication Date: 2016-12-07
JIANGSU UNIV
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Problems solved by technology

[0005] The purpose of the present invention has two: 1, propose a kind of novel reach law-self-variable speed exponential reach law, solve the inherent chattering and poor convergence performance problem in the traditional sliding mode variable structure, further improve the robustness of the system sex
2. A bearingless asynchronous motor sliding mode controller (Adaptive Variable-rated Sliding ModeController, ASMC) based on the self-variable speed reaching law is proposed to solve the problem of bearingless asynchronous motor control system under large disturbance (parameter change, load mutation, etc.) Improve the speed and robustness of the bearingless asynchronous motor speed control system to solve the problem of poor performance

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  • Novel reaching law based bearingless asynchronous motor sliding-mode control method
  • Novel reaching law based bearingless asynchronous motor sliding-mode control method
  • Novel reaching law based bearingless asynchronous motor sliding-mode control method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] like figure 1 Shown is the structure diagram of the sliding mode variable control system of the bearingless asynchronous motor. The control system is composed of the torque part and the suspension part. The control process of the torque part is as follows: the speed ω and the given speed ω are detected by the photoelectric encoder * The difference of the comparison generates a given current through the self-variable sliding mode speed controller It and a given air gap flux linkage ψ * 1 The current given component i is obtained through air gap magnetic field oriented decoupling control * 1sq and excitation component i * 1sd . i * 1sd i * 1sq The three-phase given current i of the torque winding is obtained by coordinate transformation * 1A i * 1B and i * 1C , the phase angle θ required for coordinate transformation * ...

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Abstract

The invention discloses a novel reaching law based bearingless asynchronous motor sliding-mode control method. A motor rotational speed ring adopts a novel reaching law based sliding-mode speed controller, the controller adopts a novel reaching law having an automatic speed change function, an integral sliding-mode surface is built by means of a rotational speed error in a bearingless asynchronous motor speed regulation system, and a current signal i<*><Iq> of the speed ring is extracted by combining an electromagnetic torque and motion equation. On the basis of a traditional index reaching law, a first-order norm / / x / / 1 of a system state variable is introduced, and the problems of buffeting existing in traditional index reaching rate and poor convergence performance are solved; the bearingless asynchronous motor sliding-mode speed controller applying the reaching law design has relatively high robustness on uncertainty disturbance of the system, the running quality of the bearingless asynchronous motor speed regulation system is effectively improved, moreover, the control strategy is simple, and engineering implement is facilitated.

Description

technical field [0001] The invention is a sliding-mode variable control method for a bearingless asynchronous motor based on a novel reaching law, and belongs to the technical field of electric transmission control equipment. Background technique [0002] The bearingless asynchronous motor integrates the functions of motor rotation and suspension. It has the advantages of no friction, no wear, no lubrication, long life, high-speed, high-precision operation, etc. It has an irreplaceable position in special fields such as delivery pumps, aerospace, and high-speed hard disks. However, the bearingless asynchronous motor is a multivariable, nonlinear, and strongly coupled complex system. When the motor parameters change or are subject to large external disturbances, such as the conventional PI controller, it cannot meet the system stability and high-precision control requirements. [0003] Scholars at home and abroad have done a lot of research on this, and some advanced control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/02H02P21/00
CPCH02P21/00H02P21/0007H02P25/02
Inventor 杨泽斌万玲赵若妤孙晓东陈林孙卫明
Owner JIANGSU UNIV
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