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Repetition and prediction control method of asynchronous motor

A technology of predictive control and asynchronous motor, which is applied in the direction of motor generator control, electronically commutated motor control, control system, etc., and can solve the problems of low steady-state accuracy, poor dynamic performance, and inability to control the speed well.

Active Publication Date: 2018-08-03
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a repetitive predictive control method for asynchronous motors, which solves the problems in the prior art that the rotation speed cannot be well controlled, resulting in low system steady-state accuracy and poor dynamic performance.

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  • Repetition and prediction control method of asynchronous motor
  • Repetition and prediction control method of asynchronous motor
  • Repetition and prediction control method of asynchronous motor

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Embodiment Construction

[0082] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0083] A kind of repetitive predictive control method of asynchronous motor of the present invention, permanent magnet synchronous motor adopts vector control system, such as figure 1 As shown, the repetitive controller is designed in the speed loop, and the steady-state performance, anti-disturbance performance and robust performance of the induction motor vector control system can be improved through repetitive control; the predictive controller is designed on the basis of repetitive control, and the predictive controller can be used Compensate the time delay and output error of repeated control, and further enhance the dynamic performance of the control system.

[0084] Such as figure 1 As shown, the control system adopts repetitive predictive control in the speed loop to form a closed-loop AC speed control system with speed control. The ...

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Abstract

The invention discloses a repetition and prediction control method of an asynchronous motor, a repetition control system is designed in the speed ring, and prediction design is designed on the basis of repetition control. Advantages of repetition control are used to realized a higher stable-state precision; but the control system has modeling errors caused by factors as parameter change and external interference due to phase lag of repetition control, and a mathematic model Gn(s) of a control object cannot represent a practical object G(s) accurately. Prediction control is designed on the basis of repetition control, so that instant performance is realized, modeling errors can be compensated, the dynamic performance of the control system can be further improved, the control system has a higher inhibition characteristic for external interference via the control strategy, and requirement for high performance of an induction motor control system can be met.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a repetitive predictive control method for an asynchronous motor. Background technique [0002] Induction motor is a typical nonlinear system, and its most obvious features are high order, strong coupling and many variables. With the wide application of asynchronous motors, the research on the control strategy of asynchronous motors has also become a hot topic of discussion. However, traditional control strategies cannot achieve high-performance control of speed control systems. They have problems in many aspects such as system performance, controller parameters, and robust performance. Therefore, an advanced control strategy that can be applied to speed control systems is urgently needed. [0003] Repetitive control is a new control idea proposed in the 20th century. It is mainly derived from the internal model principle. The essence is to introduce a feedback...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/14H02P21/22
CPCH02P21/0003H02P21/14H02P21/22
Inventor 尹忠刚侯杰张瑞峰刘静钟彦儒
Owner XIAN UNIV OF TECH
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