Inverse decoupling control system of bearingless asynchronous motor based on online identification of rotor resistance

Abstract

The invention provides a bearingless asynchronous motor inverse decoupling control system based on online rotor resistance identification. The bearingless asynchronous motor inverse decoupling controlsystem comprises a bearingless asynchronous motor original system, a bearingless asynchronous motor inverse system, a rotor resistance identifier, a rotor flux observer and four closed loop regulators. A reference model and an observation model of torque system reactive power are deduced in a static coordinate system, and the reference model does not include stator resistance parameters and pureintegration element. A rotor resistance fuzzy PI adaptive law based on the Popov hyperstability theory is constructed so as to effectively improve the real-time rapidity and accuracy of rotor resistance identification, and the rotor resistance parameters in the inverse system model and the rotor flux observation model of the bearingless asynchronous motor are corrected in real time and thus the dynamic decoupling control performance can be effectively improve. The system belongs to the technical field of online parameter detection and drive control of the novel special motor and is especiallysuitable for the occasion of high-performance dynamic decoupling control application of the bearingless asynchronous motor.

Description

Technical field [0001] The invention relates to the technical field of parameter online detection and control of special AC motors, in particular to a bearingless asynchronous motor inverse decoupling control system based on rotor resistance online identification. Background technique [0002] The bearingless motor is based on the similarity of the stator structure of the magnetic bearing and the AC motor. It has developed in recent years and is suitable for high-speed operation. It has a wide range of application prospects in the fields of aerospace, material sealing and transmission, and advanced manufacturing. During the operation of a bearingless asynchronous motor, the parameters of the motor will change with the change of the operating environment, especially the rotor resistance is greatly affected by temperature changes, which will cause the observation error of the rotor flux, which indirectly affects the accuracy of the air gap flux. Performance, dynamic decoupling cont...

AI Technical Summary

Problems solved by technology

During the operation of the bearingless asynchronous motor, the motor parameters will change with the change of the operating environment, especially the rotor resistance is greatly affected by the temperature change, which will lead to the observation error of the rotor flux linkage, thus indirectly affecting the accuracy of the air gap flux linkage. performance, dynamic decoupling control performance of the system

[0003] The search results of existing literature and patents found that: there is a complex electromagnetic coupling relationship inside the bearingless asynchronous motor, and to achieve its high-performance control, it is necessary to realize the decoupling control between its related variables; about the inverse system dynamics of the bearingless asynchronous motor Decoupling control has been studied at home and abroad, but the rotor resistance parameters have an important impact on the dynamic decoupling control performance of the inverse system

At present, there are few research reports on the identification of rotor resistance of bearingless asynchronous motors; for bearingless asynchronous motors, there are existing literatures based on the principle of the influence of rotor resistance changes on the air gap flux linkage of the torque system, using magnetic levitation force commands to perform bearingless asynchronous Research on the identification of motor rotor resistance, but it can only be applied to the special case of known external radial force load

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