Permanent magnet synchronous motor high-performance control method based on speed sensorless

Abstract

The invention discloses a permanent magnet synchronous motor high-performance control method based on speed sensorless. The method comprises the following steps: 1) designing and simulating a PMSM vector control system based on DSP modularization in software; 2) establishing a PMSM vector control system hardware circuit based on DSP modularization, and establishing two-way communication between the hardware circuit and an upper computer; 3) adding an extended state observer into a speed loop controller of the upper computer, controlling the rotating speed of the motor by adopting an active disturbance rejection control strategy, and filtering a speed signal by adopting a differential tracking filter before the extended state observer acquires the speed signal; and 4) introducing the speedloop controller in the step 3) into the PMSM vector control system hardware circuit built in the step 2) to control the PMSM, and replacing a traditional IIR filter with a differential tracking filterto solve the problem of noise, thereby improving the speed regulation performance of the motor.

Description

technical field [0001] The invention relates to a control method of a permanent magnet synchronous motor, in particular to a high-performance control method of a permanent magnet synchronous motor, which belongs to the field of servo control systems. Background technique [0002] Due to its small size, large torque inertia ratio, high efficiency and reliability, and excellent servo system performance, permanent magnet synchronous motors play an important role in industrial production, especially in robotics, aerospace, and CNC machine tools. And occasions and fields that require high control precision. But the permanent magnet synchronous motor is a strongly coupled nonlinear system. Its application environment is generally more complex, often subject to various disturbances, these disturbances often come from uncertain factors neglected in the modeling process, sudden changes in load and changes in the working environment. Their existence makes the performance of the clos...

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Problems solved by technology

[0005] Aiming at the characteristics of the permanent magnet synchronous motor itself and the defects of the traditional filter and PID control, the present invention designs a high-performance control method for the permanent magnet synchronous motor based on no speed sensor, and adopts the form of a differential tracking filter to replace the traditional IIR filter and based on this proposed sensorless technology

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