Constructing method for decoupling controller of support vector machine inverter of bearingless asynchronous motor

Abstract

The invention discloses a constructing method for a decoupling controller of a support vector machine inverter of a bearingless asynchronous motor. The support vector machine inverter is constructed by a support vector machine with 10 input nodes and 4 output nodes and six integrators s-1 and is arranged in front of a complex controlled object to form a pseudo-linear system, and two corresponding displacement regulators, one speed regulator and one flux linkage regulator are respectively designed for integral type pseudo-linear subsystems; a linear closed-loop controller is constructed by four regulators; and the decoupling controller is constructed by the linear closed-loop controller, the support vector machine inverter, two Clark inverse transformers and two current tracking inverters. According to the constructing method, control on a multi-variable, nonlinear and strong-coupling time-changing system is converted into control on two displacement second-order integral linear subsystems, one speed first-order integral linear subsystem and one flux linkage first-order integral linear subsystem, and dynamic decoupling of the radial force, the speed and the flux linkage can be realized.

Description

technical field [0001] The invention belongs to the technical field of electric drive control equipment, and relates to a construction method for a decoupling controller of a bearingless asynchronous motor, which is suitable for high-performance control of a bearingless asynchronous motor. Bearingless asynchronous motors integrate the advantages of magnetic bearings and asynchronous motors, and have broad application prospects in special power transmission fields such as compressors, centrifuges, electromechanical energy storage, turbomolecular pumps, machine tool electric spindles, and aerospace. Background technique [0002] Bearingless asynchronous motors not only have a series of advantages such as uniform air gap, simple structure, firmness and reliability, and low cost, but also have the characteristics of wide field weakening range and low cogging pulsating torque. It is one of the most promising bearingless motors. . However, the bearingless asynchronous motor has a...

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Problems solved by technology

As a complex nonlinear system, bearingless asynchronous motors have significant changes in rotor parameters with various operating conditions, making it difficult to apply the inverse system method in practice.

Although the neural network inverse method solves the shortcomings of the inverse system method, the neural network inverse control method has local minimum problems, slow learning speed, long training time, difficulty in extracting ideal samples, and difficult optimization of the network structure. The method of bearingless asynchronous motor decoupling control effect is not good

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