Reversing adaptive direct torque control method for permanent magnet synchronous motor in mees

Abstract

The invention relates to a MEES medium-permanent magnet synchronous motor thrust reverser self-adaption direct torque control method. The method comprises the following steps: firstly, a machinery elasticity energy storing device full system mathematical model, which is made by connecting with a volute spring box, a permanent magnet synchronous motor, and a frequency changer in sequence, is set up; secondly, the energy storing box torque and rotational inertia are adopted by utilizing forgetting factor recursion least squares algorithm, and the parameters of controlled members are updated in real time; thirdly, corner, rotate speed, torque and flux linkage thrust reverser controller are designed combined with the identified result, then finally the component of stator voltage under two phase static coordinate, at the same moment, rotational inertia and torque self-adaption controller are designed to eliminate the influence of identification error on control performance; lastly, switching signal with constant frequency is produced by utilizing voltage space vector modulation method, the operation of frequency converter is controlled, the effective control for permanent magnet synchronous motor is achieved and the stability in the process of storing energy is ensured.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and relates to a control method of a permanent magnet synchronous motor with a mechanical elastic energy storage box as a load, in particular, it is a back-push self-adaptive direct torque control method of a permanent magnet synchronous motor in MEES. Background technique [0002] The energy storage element of the mechanical elastic energy storage device is a mechanical elastic energy storage box, and its internal structure is juxtaposition of scroll springs. The conversion and storage of electrical energy to mechanical elastic potential energy is realized by driving a permanent magnet synchronous motor (PMSM). During the energy storage process, the torque and moment of inertia of the energy storage box change continuously, especially the reverse torque of the energy storage box gradually increases with the progress of the energy storage process. If the output torque of the motor cannot ...

AI Technical Summary

Problems solved by technology

During the energy storage process, the torque and moment of inertia of the energy storage box change continuously, especially the reverse torque of the energy storage box gradually increases with the progress of the energy storage process. If the output torque of the motor cannot be matched quickly, it may cause the The energy box reverses with the motor and damages the motor

At the same time, the time-varying characteristics of the moment of inertia may cause the vibration of the motor speed, affect the mechanical properties of the energy storage box and destroy the stability of the energy storage process

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