Permanent magnet motor variable scanning control system based on automatic disturbance rejection control

Abstract

The invention discloses a permanent magnet motor variable scanning control system based on automatic disturbance rejection control. The control system adopts a speed-current q-d two-axis closed-loop control structure which comprises an active disturbance rejection control module, a first current controller, a second current controller, a first PARK inverse conversion module, a second PARK inverseconversion module, a CLARK conversion module, a space vector pulse width modulator (SVPWM), a three-phase inverter, and a speed and angle calculation module. The active disturbance rejection control module, the first current controller, the first PARK inverse conversion module, the space vector pulse width modulator (SVPWM) and the three-phase inverter form a connection link, and the first PARK inverse conversion module is also connected with the second current controller and the second PARK inverse conversion module. The second PARK inverse transform module is also connected with the CLARK transform module. In the variable speed scanning control system of the permanent magnet motor of the present invention, the system performance superior to the PID control is obtained, and the performance advantage of the automatic disturbance rejection control strategy in the variable speed scanning control under the complex environment is proved.

Description

technical field [0001] The invention relates to a motor control system, in particular to a permanent magnet motor variable scanning control system based on active disturbance rejection control. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the characteristics of small torque ripple, large speed range, high precision and high efficiency, low inertia and low noise, etc. It has been widely used in control systems in different fields since the end of the last century. In engineering, the most commonly used speed control strategy in the control system is still the classic PID control. Its working principle is to generate the control quantity by using the proportional parameter and the integral parameter according to the deviation between the controlled quantity and the given reference index. The control effect of reducing errors and eliminating steady-state errors is achieved. The PID control strategy has the advantages of simple structure, good con...

AI Technical Summary

Problems solved by technology

Active disturbance rejection control technology retains the core idea of ​​traditional PID control to eliminate errors by generating control quantities based on errors. It has the advantages of smooth response, wide parameter adaptability, and strong anti-disturbance ability. The amount can not be output immediately, resulting in hysteresis. Its stability is high when it is applied to constant-speed scanning, but for variable-speed scanning tracking, hysteresis will lead to tracking inaccuracy.

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