Self-adaptative inverse decoupling control method based on non-linear filters for bearing-free asynchronous motor

Abstract

The invention discloses a self-adaptative inverse decoupling control method based on non-linear filters for a bearing-free asynchronous motor. The self-adaptative inverse decoupling control method based on the non-linear filters for the bearing-free asynchronous motor relates to a suspension control subsystem and a torque control subsystem. The self-adaptative inverse decoupling control method based on the non-linear filters for the bearing-free asynchronous motor comprises the steps that a Park inverse converter, a spatial vector pulse width modulation inverter, an angle calculation model, the bearing-free asynchronous motor and a load model of the bearing-free asynchronous motor integrally form a torque winding controlled object through the torque control subsystem; an object model and an object inverse model of the torque winding controlled object are established; the weight of each non-linear filter is determined in an off-line mode; the object reverse model is copied to serve as a feedforward controller to be arranged in front of the torque winding controlled object in series, so that a self-adaptive inverse controller is formed; the difference between the output of the torque winding controlled object and the output of the object model is obtained, and the object reverse model is driven by the difference; the weight of the self-adaptive inverse controller is adjusted in an on-line mode in real time according to the output of the torque winding controlled object and the difference of a given angular speed and a rotor magnetic chain. According to the decoupling method, the control precision is high, the speed is high, the following performance is good, and the interference resistance is high.

Description

technical field [0001] The invention is an adaptive inverse decoupling control method based on a nonlinear filter, which is suitable for high-performance control of a multivariable input and output nonlinear bearingless asynchronous motor, and belongs to the technical field of electric drive control equipment. Background technique [0002] The bearingless asynchronous motor has complex electromagnetic relations, and is a multivariable, nonlinear, and strongly coupled system. There is a complex nonlinear coupling relationship between its rotational force and radial levitation force. To control the rotation, nonlinear dynamic decoupling control must be performed on the asynchronous motor. [0003] Vector control is based on the motor electromagnetic theory, using coordinate transformation, the bearingless asynchronous motor model is equivalent to a DC motor model for control, the more commonly used is the air gap field orientation and rotor field orientation vector control str...

AI Technical Summary

Problems solved by technology

The ideas used in the above two patents are related to this patent to a certain extent, but there are essential differences in the structures, control methods and control requirements of various motors

There are currently no relevant patent materials for the design of the space vector pulse width modulation control method of the suspension winding of the bearingless asynchronous motor and the adaptive inverse decoupling controller based on the nonlinear filter

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