Direct torque control method for permanent magnet synchronous motor based on torque ring active disturbance rejection control technology

Abstract

The invention provides a direct torque control method for a permanent magnet synchronous motor based on the torque ring active disturbance rejection control technology, and the method comprises the following steps: calculating a given torque Te* and a feedback torque Te; taking the difference between the given torque T<e><*> and the feedback torque T<e> as the input, taking an angle variation delta(theta<s>) of a stator flux linkage as the output, and setting an active disturbance rejection controller; calculating an output voltage vector through the angle variation of the stator flux linkage,and outputting a PWM control signal through a space vector modulation module. The method is advantageous in that the method avoids the impact from integral saturation, achieves the observation of theuncertainty and unmodeled dynamics of parameters through ESO, and achieves the compensation for the total disturbance quantity of the observation in NLSEF, so as to improve the robustness of a motorcontrol system, and improve the dynamic and static response performances.

Description

technical field [0001] The invention relates to the field of industrial automation, in particular to a method for direct torque control of permanent magnet synchronous motors based on torque loop self-disturbance rejection technology. Background technique [0002] Due to its excellent characteristics such as high torque inertia ratio, high power factor and high efficiency, permanent magnet synchronous motors have received more and more attention and applications in high-tech fields such as robots, high-precision CNC machine tools, and electric vehicles. . An advanced control method is a necessary condition for obtaining the excellent operating performance of the permanent magnet synchronous motor. The direct torque control method proposed in the 1980s is a high-performance control method for controlling the motor. [0003] The main structure of the traditional direct torque control method is a hysteresis controller and a switch vector table, in which two hysteresis controll...

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Problems solved by technology

However, the PI controller will be affected by the saturation of the integral link and system noise, and has the disadvantages of poor adaptability to system parameter uncertainty and external interference signals, which will affect the operating performance of the motor

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