Segmented Angle Compensation Method for Permanent Magnet Synchronous Motor

Abstract

The present invention discloses a segment angle compensation method of a permanent magnet synchronous motor. The method comprises the following steps of: setting an initial value of an inverse Park angle compensation quantity delta_IP as 0, and taking an initial value of a Park angle compensation quantity delta_P as 0; allowing an MCU to control an angle sampling device to collect a real-time electrical angle theta of a permanent magnet synchronous motor, allowing the MCU to control work of a phase-locked loop speed measurement device, and obtaining a real-time angular speed W of the motor byphase-locked loop speed measurement device according to a phase-locked loop algorithm; obtaining the inverse Park angle compensation quantity delta_IP, and performing inverse Park angle compensation;and obtaining the Park angle compensation quantity delta_P, and performing Park angle compensation. The segment angle compensation method of the permanent magnet synchronous motor employs two-sectioncompensation methods consisting of inverse Park angle compensation and Park angle compensation to improve the utilization rate of a bus voltage and the output precision of a torque and increases the stability of the system.

Description

technical field [0001] The invention relates to the technical field of control algorithms of permanent magnet synchronous motors, in particular to a segmental angle compensation method of permanent magnet synchronous motors capable of improving bus voltage utilization and torque output accuracy. Background technique [0002] With the development of the national economy and science and technology, motors play an increasingly important role in all walks of life. Due to its many advantages in design, manufacture and control, permanent magnet synchronous motors are widely used in various industrial production and life occasions. In addition, my country is rich in rare earth resources, and the application market of permanent magnet synchronous motors is particularly large in my country. Permanent magnet synchronous motors can be divided into surface mount type and built-in type according to the similarities and differences of AC-D axis inductance. Because the built-in permanent ...

AI Technical Summary

Problems solved by technology

In motor control, the angle is the amount of rotation change. There are two sources that specifically affect the calculation of the angle error. One is the resolution error caused by the motor installation process, and it is often ignored in the discretization process. Calculate the angular offset of the motor in the step size, which will affect the accuracy of the Park transformation and inverse Park transformation of the motor control

Images