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A model predictive flux linkage control system and method based on gain matrix

A technology of gain matrix and model prediction, applied in control systems, vector control systems, control generators, etc., can solve problems such as motor instability and narrow application range, and achieve stability, solve limitations, and large damping ratio Effect

Active Publication Date: 2021-03-23
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] In view of this, the object of the present invention is to propose a model predictive flux linkage control system and method based on gain matrix, to solve the problem that the traditional matrix in the prior art has a narrow application range and the motor is prone to instability when the motor speed is high. The problem

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  • A model predictive flux linkage control system and method based on gain matrix
  • A model predictive flux linkage control system and method based on gain matrix
  • A model predictive flux linkage control system and method based on gain matrix

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that all the expressions using "first" and "second" in this practical embodiment are to distinguish two entities with the same name but different parameters or different parameters. It can be seen that "first" and "second" " is only for the convenience of expression, and should not be understood as a limitation to the practical embodiment, and the subsequent embodiments will not explain it one by one.

[0044] The invention provides a gain matrix-based model prediction flux linkage control system and method.

[0045]A model predictive flux linkage control system based on gain matrix, refer to figure 1 , including variable parameter PI regulator module, reference value conversion module, space ve...

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Abstract

The invention discloses a model prediction flux linkage control system and method based on a novel gain matrix. The invention provides a brand new gain matrix design method to replace the traditionalgain matrix through a series of methods such as constructing an observer model according to a mathematical model, solving poles of an asynchronous motor, solving a pole of an observer according to themodel and solving the novel gain matrix according to the model, thereby solving the limitation of the role of the gain matrix in the prior art. The applicability of the adopted design method is expanded, and the damping ratio is greater compared with the gain matrix of the traditional pole-shifting configuration method, thereby being more conducive to the stability of the motor.

Description

technical field [0001] The invention relates to the field of motors, in particular to a gain matrix-based model predictive flux linkage control system and method. Background technique [0002] In a high-performance asynchronous motor speed control system, obtaining accurate flux linkage information is crucial to the performance of the control system. However, the internal magnetic field information of asynchronous motors is difficult to measure directly, and software algorithms are usually used to estimate it in practical applications. [0003] The methods mainly used in the prior art include methods such as current model method, voltage model method, sliding mode observer, full-order observer, and Kalman filter. Among these methods, the full-order observer has attracted extensive attention due to its good observation accuracy in a wide speed range and can realize speedless operation. At the same time, the full-order observer has good parameter robustness and can even furth...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/05H02P21/13H02P21/28
CPCH02P21/0085H02P21/05H02P21/13H02P21/28
Inventor 张永昌黄朋白宇宁
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY