Constructing method for decoupling controller of bearingless permanent magnet synchronous motor with five degrees of freedom

Abstract

The invention discloses a constructing method for a decoupling controller of a bearingless permanent magnet synchronous motor with five degrees of freedom. Three Clark inverse transformers are respectively connected in front of three corresponding current tracking inverters in series, and the three current tracking inverters and one linear power amplifier are respectively connected in front of the synchronous motor and a load model thereof in series to form a complex controlled object; and a support vector machine inverter with 6 input nodes and 7 output nodes is constructed by a support vector machine with 17 input nodes and 7 output nodes and 11 integrators, a pseudo-linear system is formed, a corresponding pseudo-linear subsystem controller is designed, a linear closed-loop controller is constructed, and the decoupling controller of the synchronous motor is constructed by the linear closed-loop controller, the support vector machine inverter, the three Clark inverse transformers, the three current tracking inverters and one linear power amplifier. Nonlinear dynamic decoupling control on the rotor displacement and the rotating speed of the bearingless permanent magnet synchronous motor with five degrees of freedom can be realized.

Description

technical field The invention belongs to the technical field of electric drive control equipment, and relates to a construction method of a five-degree-of-freedom bearingless permanent magnet synchronous motor decoupling controller. The bearingless permanent magnet synchronous motor is suitable for high-speed and ultra-high-speed special electric transmission, and is used in CNC machine tools, Aerospace, sealed pumps, electromechanical energy storage, life sciences and many other special electric transmission fields have broad application prospects. Background technique According to the similarity between the magnetic bearing structure and the traditional motor structure, the bearingless permanent magnet synchronous motor stacks the magnetic bearing windings that generate radial levitation force and the stator (torque) windings of the permanent magnet synchronous motor, so that the motor rotor has both rotation and Self-suspension capability realizes the bearingless motor. ...

AI Technical Summary

Problems solved by technology

However, the five-degree-of-freedom bearingless permanent magnet synchronous motor is a complex nonlinear system, and its parameters vary significantly under various working conditions, making it difficult to apply the inverse system method in practice.

Although the current neural network inverse method can solve the problem that the inverse model is difficult to obtain in the inverse system method, due to the local minimum problem of the neural network, and the slow learning speed, long training time, difficulty in extracting ideal samples, and difficult optimization of the network structure and other defects, making the decoupling control effect of the five-degree-of-freedom bearingless permanent magnet synchronous motor based on the neural network inverse method not good