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Quasi-PI disturbance perception control method of three-phase permanent-magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., and can solve problems such as large amount of calculation, lack of anti-disturbance, rapidity and lack of overshoot

Inactive Publication Date: 2018-09-04
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the improved PI control has certain limitations in the practical application field due to the large amount of calculation when stabilizing parameters online, the contradiction between rapidity and overshoot, and the lack of anti-disturbance.
In addition, although Active Disturbance Rejection Control (ADRC) can solve the problem of PI lack of disturbance immunity, ADRC has the outstanding problem of a large amount of calculation

Method used

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  • Quasi-PI disturbance perception control method of three-phase permanent-magnet synchronous motor
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  • Quasi-PI disturbance perception control method of three-phase permanent-magnet synchronous motor

Examples

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Effect test

example 1

[0111] Example 1. Load torque T L The initial setting is 0 (no load), when t=0.05s, T L = 10 N·m. Simulation results such as Figure 5 . Figure 5 It shows that the actual speed of the motor can quickly and accurately track the reference speed without overshoot, and the d-q axis stator current also has a fast dynamic response speed, thus verifying the effectiveness of the quasi-PI disturbance-aware control method.

example 2

[0112] Example 2. In order to verify the anti-disturbance ability of the quasi-PI disturbance-aware control method, in the simulation experiment, the load torque is fluctuated by ±30% on the rated load, and the load torque fluctuation curve is as follows Figure 6 , the simulation results are as Figure 7 . Depend on Figure 6 and Figure 7 It can be seen that when the load fluctuates greatly, the motor speed is very stable without obvious oscillation. Especially at the moment of 0.3 second and 0.45 second, the motor load fluctuates by -46% and +85% respectively, while the motor speed only fluctuates briefly and slightly. In addition, when the motor load fluctuates, the d-q axis stator current has a fast dynamic response speed, which further verifies that the quasi-PI disturbance-aware control method not only has the characteristics of fast response speed, high control precision, and strong robustness and stability, but also has strong anti-disturbance ability.

[0113] 7...

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Abstract

Although the problem that a gain parameter is difficult to control is solved by each improved PID, the calculation quantity is increased; and moreover, inherent conflict between rapidness and overshoot exists in a traditional PID and each improved PID, the traditional PID and each improved PID both have inherent defect of disturbance rejection capability shortage, and thus, limitation exists in practical application. By a quasi-PI disturbance perception control method of a three-phase permanent-magnet synchronous motor, the conflict between the rapidness and the overshoot is effectively solved, moreover, the quasi-PI disturbance perception control method also has the characteristics of high control accuracy, good robust stability, high disturbance rejection capability and the like, and thegain parameter is completely determined by integral step; and particularly, the gain parameter is not needed to be controlled again when an external environment is abruptly changed, and a control strategy of a typical control theory and a modern control theory is completely overturned. And the quasi-PI disturbance perception control method has important theoretical significance and application value to rotational speed control of the three-phase permanent magnet synchronous motor (PMSM).

Description

technical field [0001] Control theory and control engineering, motor operation and control. Background technique [0002] Permanent Magnet Synchronous Motor (Permanent Magnetic Synchronous Motor, PMSM) is widely used in industrial speed control systems due to its high power / weight ratio, high torque / inertia ratio, high efficiency and certain robustness. Most traditional PMSM speed control systems adopt a double-loop linear control structure, the inner loop is the current loop, and the outer loop is the speed loop. Although a variety of advanced and complex control strategies such as nonlinear PI control, adaptive control, fuzzy control, sliding mode variable structure control (SMC), etc. are applied to PMSM speed control systems, these nonlinear control strategies require more processors High or there are problems such as chattering, which need to be further improved. Therefore, the dominant control method in industrial applications is still various improved PI control. H...

Claims

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Application Information

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IPC IPC(8): H02P21/00
CPCH02P21/0003
Inventor 曾喆昭
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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