A generalized cascade model predictive flux linkage control method and device for asynchronous motors

A technology of asynchronous motor and cascade model, which is applied in the direction of motor generator control, electromechanical transmission control, electronic commutation motor control, etc., to achieve the effect of eliminating debugging and design problems, eliminating complex calculations, and improving execution efficiency

Active Publication Date: 2021-09-07
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to propose a generalized control method with strong versatility and low complexity, which can significantly improve the control effect and solve the problem of repeated debugging of the weight coefficients in the traditional model predictive control. Linked model predictive flux linkage control method and device

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  • A generalized cascade model predictive flux linkage control method and device for asynchronous motors
  • A generalized cascade model predictive flux linkage control method and device for asynchronous motors
  • A generalized cascade model predictive flux linkage control method and device for asynchronous motors

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[0047] 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.

[0048] The invention will be further described below in conjunction with the accompanying drawings, as figure 1 As shown, it is a flow chart of the implementation method of the generalized cascade model prediction flux linkage control method for asynchronous motors provided by the present invention, including:

[0049] Step 101, obtain the torque command according to the PI regulator of the outer ring speed, and set the flux linkage amplitude command, the steps include:

[0050] According to the torque command T obtained by the PI regulator of the outer ring speed e * , specifically expressed as (k p and k i are the proportional gain and integral gain in the PI regulator respectively, s means differential), directly...

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Abstract

The invention discloses a generalized cascade model prediction flux linkage control method of an asynchronous motor, which comprises: obtaining a torque instruction according to the PI regulator of the outer ring speed, and setting a flux linkage amplitude instruction; according to the calculated stator flux linkage and stator Current, predict stator flux linkage and torque at k+1 time; according to the obtained torque command and flux amplitude command, obtain the predicted stator flux linkage and torque at k+1 time, and construct flux linkage An objective function and a torque objective function; according to the obtained flux linkage objective function or torque objective function, an optimal candidate voltage vector is generated to construct a driving signal for each switching tube of the inverter. The generalized cascaded model predictive flux linkage control method and device of the asynchronous motor provided by the present invention solve the problem that the weight coefficient needs to be repeatedly debugged in the traditional model predictive control scheme.

Description

technical field [0001] The invention relates to the field of speed regulation control of high-performance asynchronous motors, in particular to a generalized cascade model prediction flux linkage control method and device for asynchronous motors. Background technique [0002] The model predictive control method has a simple principle, is easy to realize multivariable control, and is easy to solve problems such as nonlinear constraints. The optimal solution is obtained through online rolling optimization. In recent years, a large number of scholars have carried out extensive research on the application of model predictive control in the field of electric drive. The control variables of the traditional scheme are electromagnetic torque and stator flux amplitude with inconsistent dimensions. In order to achieve good dynamic and static performance of the system under various working conditions, it is necessary to determine the appropriate weight coefficient through repeated simu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/28
CPCH02P21/0003H02P21/28
Inventor 张永昌张博越
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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