Torque output control system of permanent magnet synchronous motor

Abstract

The invention provides a torque output control system of a permanent magnet synchronous motor. The system comprises a modulation module, an inverter and the permanent magnet synchronous motor, wherein the modulation module, the inverter and the permanent magnet synchronous motor are electrically connected in sequence. The system further comprises a 3/2 conversion module, a torque calculation module, a required current calculation module, a torque comparator, a torque current compensation integral adjustment module, a torque current adder, a magnetic flow current calculation module, a torque current comparator, a magnetic flow current comparator and a current PI regulating module. On the basis of controlling torque output, and by using actual output torque as a target, the torque output control system is used for calculating torque deviation and correcting the matching relation between magnetic flow current and torque current according to the torque deviation so as to enable motor torque output to track target torque.

Description

technical field [0001] The invention relates to a torque output control system of a permanent magnet synchronous motor. Background technique [0002] In recent years, due to the advantages of fast torque response and high power density, permanent magnet synchronous motors have been widely used in pure electric vehicles and hybrid vehicles, and the drive control of motors has become a research hotspot. In new energy vehicles, the torque control method is mostly used for motor drive, and the motor controller responds to the torque command of the vehicle controller to drive the motor to perform normal control of the vehicle. Therefore, higher requirements are put forward for the accuracy of motor control torque. However, in actual control, due to the complex saturation characteristics of the motor inductance, it is difficult to accurately calibrate and identify, which will cause deviations in torque control, thereby affecting the control performance of the vehicle. Contents ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the existing permanent magnet synchronous motor torque control system is difficult to accurately calibrate and identify the motor inductance, the control of the motor output torque will have a large deviation, the present invention proposes a permanent magnet synchronous motor torque output control system

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