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Implementation method for explicit model predictive control of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and model predictive control, which is applied in motor generator control, AC motor control, electronic commutation motor control, etc. Achieve the effects of excellent control performance, time saving and strong versatility

Active Publication Date: 2021-10-26
ZHEJIANG UNIV ADVANCED ELECTRICAL EQUIP INNOVATION CENT +1
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Problems solved by technology

[0003] In order to solve the problem of using the trial and error method to select weight coefficients in the traditional explicit model predictive control of permanent magnet synchronous motors, it is difficult to take into account multiple control performances, and it is difficult to ensure the stability under different working conditions. This invention proposes a new An implementation method of explicit model predictive control for permanent magnet synchronous motors. This new method simplifies steps, optimizes performance, and has strong versatility and practicability

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  • Implementation method for explicit model predictive control of permanent magnet synchronous motor
  • Implementation method for explicit model predictive control of permanent magnet synchronous motor
  • Implementation method for explicit model predictive control of permanent magnet synchronous motor

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Embodiment Construction

[0060] Combine below Figure 1-Figure 3 The present invention will be further elaborated with specific embodiment.

[0061] Such as figure 1 Shown, embodiment of the present invention and its implementation work process are as follows:

[0062] 1) Construct a controller for explicit model predictive control of permanent magnet synchronous motor:

[0063] The state equation of the permanent magnet synchronous motor is used as the predictive model:

[0064] x(k+1)=Ax(k)+Bu(k)

[0065]

[0066] Among them, k represents the serial number of the discrete time; x, u are state variables and control variables respectively; x(k), u(k) are state variables and control variables at k time respectively; A, B are state matrix and control matrix respectively ;x(k+1) represents the state variable at time k+1, which is the predicted value; R represents the resistance value; L represents the inductance value; p represents the number of pole pairs of the motor; ψ f Indicates the flux lin...

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Abstract

The invention discloses an implementation method for explicit model predictive control of a permanent magnet synchronous motor. The method comprises the steps of: constructing a controller for explicit model predictive control of the permanent magnet synchronous motor, processing and generating an optimal control sequence, and extracting an optimal control quantity from the optimal control sequence and applying the optimal control quantity to a control system of the permanent magnet synchronous motor; calculating an optimal control quantity and a closed-loop transfer equation of a control system under a typical working condition according to an optimal control sequence generated by a controller, taking a solution of the closed-loop transfer equation as a closed-loop pole, drawing a closed-loop pole trajectory diagram, determining an ideal band, and configuring the closed-loop pole to the ideal band so as to obtain each optimal weight coefficient; and substituting into a value function solution to carry out optimal control. According to the method, the problems that a control system is difficult to consider multiple control performances and the stability under different working conditions is difficult to guarantee are solved, the steps are simplified, the excellent control performance is obtained, and meanwhile, the method has very high universality and practicability.

Description

technical field [0001] The invention relates to a method for realizing the model predictive control of a permanent magnet synchronous motor, in particular to a new method for realizing the explicit model predictive control of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in advanced servo control fields such as robots and drones due to their advantages such as high power density and fast response. Using explicit model predictive control for permanent magnet synchronous motors, one controller can be used to uniformly control the speed and current, so that the system can reach the optimal state, avoiding the use of traditional cascaded structures; and while inheriting the advantages of model predictive control, It overcomes the limitation that the model predictive control has a large online calculation burden. However, in the explicit model predictive control of permanent magnet synchronous motors, the ...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/18H02P21/22H02P25/022
CPCH02P21/14H02P21/18H02P21/22H02P25/022
Inventor 史婷娜赵梦圆林诗雨曹彦飞阎彦夏长亮
Owner ZHEJIANG UNIV ADVANCED ELECTRICAL EQUIP INNOVATION CENT
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