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An asynchronous motor model predictive control method and device

A model predictive control, asynchronous motor technology, applied in the direction of motor generator control, AC motor control, control of electromechanical transmission devices, etc., can solve problems such as poor practicability and complexity, achieve simple and practical algorithms, reduce rotation transformation, avoid The effect of complex operations

Active Publication Date: 2019-01-18
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

In short, most of these existing methods are relatively complicated and not very practical.

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  • An asynchronous motor model predictive control method and device
  • An asynchronous motor model predictive control method and device
  • An asynchronous motor model predictive control method and device

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[0044] 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.

[0045] The present invention will be further described below in conjunction with accompanying drawing, as figure 1 As shown, it is a flow chart of an embodiment of the asynchronous motor model predictive control method provided by the present invention, including:

[0046] Step 101, according to the PI regulator of the outer ring speed, the step of generating the torque reference value includes:

[0047] Let the torque reference be expressed as

[0048] by formula Calculate the torque command, where k p and k i are the proportional gain and integral gain in the PI regulator respectively, s represents the complex frequency, Indicates the given speed, ω r Indicates the actual speed.

[0049] Step 102, according t...

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Abstract

The invention discloses an asynchronous motor model predictive control method, which comprises the following steps: generating a torque reference value according to an outer ring rotational speed PI regulator; generating an information variable of the flux linkage reference value and an information variable of the torque reference value according to the obtained torque reference value and the setstator flux linkage amplitude and according to a motor mathematical model; calculating a reference voltage vector according to the obtained information variable of the flux linkage reference value andthe information variable of the torque reference value; according to the obtained reference voltage vector, constructing the cost function and performing the rolling optimization to obtain the optimal voltage vector and drive each switching device of the inverter. The invention provides an asynchronous motor model predictive control method and device, The stator voltage reference vector trackingcontrol is realized in one control cycle, which solves the problem of repeatedly debugging the weight coefficients when the traditional model predictive control method takes the torque and magnitude of flux linkage of different dimensions as the control objective, and realizes the high-performance control of the induction motor.

Description

technical field [0001] The invention relates to the field of speed regulation control of asynchronous motors, in particular to a model predictive control method and device for asynchronous motors. Background technique [0002] Model predictive control is an online rolling optimization control algorithm. Due to its simple principle, easy handling of nonlinear constraints, and easy realization of multivariable control, it has attracted a large number of scholars to conduct extensive research on its application in the field of electric drives in recent years. . However, 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 simulations and experiments. , which greatly limits the versatility and practicability of the cont...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P27/08
CPCH02P21/0003H02P27/085
Inventor 张永昌张博越白宇宁
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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