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A Simplified Selection Method of Deadbeat Predictive Control Approximate Alternative Voltage Vector

A voltage vector, predictive control technology, applied in the control of generators, control of electromechanical brakes, control of electromechanical transmissions, etc., can solve the problems of large algorithm calculation, limit the practicability of model predictive control, etc., to improve control performance and reduce complexity. The effect of the degree and the amount of calculation

Inactive Publication Date: 2021-01-12
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the enumeration method to select the optimal alternative voltage vector needs to predict the dynamic behavior of the system under the action of all basic voltage vectors, so the calculation of the algorithm is large, which seriously limits the practicability of model predictive control.

Method used

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  • A Simplified Selection Method of Deadbeat Predictive Control Approximate Alternative Voltage Vector
  • A Simplified Selection Method of Deadbeat Predictive Control Approximate Alternative Voltage Vector
  • A Simplified Selection Method of Deadbeat Predictive Control Approximate Alternative Voltage Vector

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings.

[0053] see figure 1 , the present invention comprises the following steps:

[0054] step one:

[0055] Under the coordinate system of stator flux linkage, the simplified model of flux linkage and torque prediction of surface permanent magnet synchronous motor is shown in formula 1.1 and formula 1.2.

[0056]

[0057] formula, is the amplitude of the stator flux linkage at the current K time, is the stator flux amplitude at time k+1, is the magnitude of the voltage vector to be applied currently, Δt is the action time of the voltage vector application, and α is the angle between the voltage vector and the stator flux linkage vector.

[0058]

[0059] T e (k+1) is the motor torque at time k+1, p is the number of pole pairs of the motor, ψ f is the permanent magnet flux linkage, is the amplitude of the stator flux linkage at the current K moment, L di...

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Abstract

The invention discloses a simplified selection method for approximate alternative voltage vectors by deadbeat predictive control. The invention first deduces and calculates the angle and amplitude of ideal applied voltage vectors for flux linkage and torque deadbeat control, and then determines the set of alternative voltage vectors For the voltage vector and the zero voltage vector, finally according to the magnitude of the ideal voltage vector, choose to apply the zero voltage vector or the non-zero voltage vector, the present invention can select the optimal voltage vector without traversing all the basic voltage vectors, and predict the number of operations The reduction from 7 times to 2 times significantly reduces the complexity and calculation amount of the algorithm, and improves the control performance of the motor.

Description

technical field [0001] The invention belongs to the control field of surface type permanent magnet synchronous motors, and in particular relates to a simplified selection method of deadbeat predictive control approximate replacement voltage vector. Background technique [0002] The direct torque control technology is based on the stator flux coordinate system and directly takes the torque as the control object, avoiding a large number of calculations during the transformation of the rotating coordinates and the dependence on the motor parameters. It has good dynamic performance and short torque response time. [0003] Deadbeat control theory has been widely used in various occasions of industrial control since it was proposed. Deadbeat control is also called least beat control, which is an optimal control scheme for time. In permanent magnet synchronous motor , the deadbeat control theory takes the zero tracking error of the electromagnetic torque and flux linkage as the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30H02P27/12
CPCH02P27/12H02P21/30
Inventor 李耀华赵承辉周逸凡秦玉贵苏锦仕秦辉
Owner CHANGAN UNIV