Decoupling control method for precise compensation of radial force of bearingless permanent magnet synchronous motor

Abstract

The invention proposes a bearingless permanent magnet synchronous motor radial force precise compensation decoupling control method, including position controller, force / current conversion, current controller, radial displacement sensing module, torque winding flux linkage and rotor angle Position observers, neural networks, and voltage source inverters. Offline training of the neural network to determine the force-position model of the bearingless permanent magnet synchronous motor system; the radial displacement sensor measurement signal and the rotor angular position observation signal are fed back to the input of the neural network, and the output signal obtained is superimposed on the output signal of the position controller , to achieve precise compensation and decoupling control of the radial force of the bearingless permanent magnet synchronous motor. This method solves the nonlinear coupling problem between the rotor radial position x and y, improves the dynamic and static system performance such as the control accuracy and response speed of the rotor suspension, and achieves high-precision control of the suspension subsystem of the bearingless permanent magnet synchronous motor. Purpose.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a precise compensation and decoupling control method for radial force of a bearingless permanent magnet synchronous motor, which is suitable for high-performance control of a bearingless permanent magnet synchronous motor. Background technique [0002] The bearingless motor suspends the rotor in the inner space of the motor through the force of the magnetic field, eliminating the mechanical bearing that supports the motor rotor in the traditional motor. Bearingless motors combine the functions of magnetic suspension bearings and motors, and have the advantages of no friction, no wear, no pollution, no lubrication, maintenance-free operation, high durability, high speed and high precision, and reduce system complexity compared with magnetic suspension bearings and the axial length of the rotor; bearingless motors have broad application prospects in the fields of machine tool...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a bearingless permanent magnet synchronous motor radial force accurate compensation decoupling control method to solve the problem of non-linear coupling between displacements in the α and β directions existing in the bearingless permanent magnet synchronous motor, and to improve Performances such as control accuracy and dynamic response speed of bearingless permanent magnet synchronous motor rotor suspension

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