Permanent magnetic motor current prediction resonance control method based on disturbance observer

A disturbance observer and current prediction technology, which is applied in the direction of motor generator control, electronic commutation motor control, electromechanical brake control, etc., can solve the problem that the disturbance cannot be completely suppressed

Active Publication Date: 2018-10-26
TIANJIN UNIV
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Problems solved by technology

Another method is the Min-Max model predictive control. Although this method does not require the exact frequency of periodic disturbances, the disturbances cannot be completely suppressed

Method used

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  • Permanent magnetic motor current prediction resonance control method based on disturbance observer
  • Permanent magnetic motor current prediction resonance control method based on disturbance observer
  • Permanent magnetic motor current prediction resonance control method based on disturbance observer

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Embodiment 1

[0045] Current Predictive Resonance Control Method for Permanent Magnet Motors Based on Disturbance Observer, see figure 1 , the method includes the following steps:

[0046] 101: Establish a continuous model considering periodic and non-periodic disturbances, and establish a motor discretization model based on this model;

[0047] 102: Design an observer-based current predictive resonant controller based on a discretized motor model;

[0048] Firstly, analyze the periodic disturbance caused by the dead time of the inverter and the distribution of flux linkage and establish a periodic disturbance model. In order to suppress the periodic disturbance, a motor model with an embedded resonant controller is established based on the discretization model of the motor;

[0049] Secondly, analyze the aperiodic disturbance caused by parameter mismatch, etc., and design a disturbance observer to observe the disturbance;

[0050] Finally, according to the predicted state and the actual ...

Embodiment 2

[0056] The scheme in embodiment 1 is further introduced below in conjunction with specific calculation formulas and examples, see the following description for details:

[0057] 201: Establish a motor discretization model considering periodic and non-periodic disturbances and control delays;

[0058] Among them, when considering periodic and non-periodic disturbances, the continuous model of surface-mounted permanent magnet motor can be expressed as:

[0059]

[0060] In the formula, i s = i d +ji q , u s = u d +ju q are stator current vector and stator voltage vector respectively; i d i q are the d-axis and q-axis components of the stator current vector; u d , u q are the d-axis and q-axis components of the stator voltage vector; ω m is the rotor electrical angular velocity; R s and L s They are permanent magnet flux linkage, stator resistance and inductance; γ and w represent periodic and non-periodic disturbances, respectively. Unless otherwise specified, ...

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Abstract

The invention discloses a permanent magnetic motor current prediction resonance control method based on a disturbance observer. The method comprises following steps of establishing a continuous modelwhich considers periodical and non-periodical disturbance, and based on the continuous model, establishing a motor discretization model; based on the motor discretization model, designing a current prediction resonance controller based on an observer; and carrying out setting processing on the parameters of the current prediction resonance controller. According to the invention, a model of internally arranged resonance controller is established and used for inhibiting periodical disturbance; the disturbance observer is designed and used for observing non-periodical disturbance; and predictionresonance control rate is designed, so effective inhibition of the periodical and non-periodical disturbance is achieved. The invention provides a parameter setting method of the prediction controller, the observer and the resonance controller, so flexible adjustment of bandwidths and inhibition of periodical disturbance of frequency change of a current controller of the permanent magnetic motor are achieved.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to non-periodic and periodic disturbance suppression of permanent magnet motors, and designs a current prediction resonance control method for permanent magnet motors based on a disturbance observer. Background technique [0002] Permanent magnet motors have been widely used in the field of electric drives. With the improvement of dynamic performance and control precision requirements, traditional control methods cannot meet people's demand for control performance. With the improvement of the computing power of the control core, it is possible to apply more complex control algorithms to practice. Among them, model predictive control with perfect dynamic performance and flexible control performance has attracted extensive attention. [0003] Recently, model predictive control has continued to develop. However, its control performance is affected by the accuracy of the model....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13
CPCH02P21/13
Inventor 宋战锋周凤娇
Owner TIANJIN UNIV
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