Magnetic suspension bearing control method

Abstract

The invention discloses a magnetic suspension bearing control method, and relates to the technical field of bearings. The magnetic suspension bearing control method comprises the following steps: a current sensor is used for detecting to obtain current signals; a displacement sensor is used for detecting to obtain real-time displacement signals; a differential tracker is used for obtaining movingspeed signals and real-time displacement signals and calculating errors between reference displacements and real-time displacements to input in a displacement adjuster to obtain reference moving speedsignals; errors between reference current and real-time current are calculated and input in a current adjuster to obtain reference duty ratio signals; and the reference duty ratio is input in a switching sequence table to obtain switching tube gate driving signals for driving a single-phase full bridge converter, and a magnetic suspension bearing is further driven. Through closed-loop control over three feedback control quantities, higher control rigidity, higher stability and higher control precision are obtained.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a method for controlling a magnetic suspension bearing. Background technique [0002] Magnetic suspension bearing is a kind of bearing that uses output electromagnetic force to realize the suspension of moving parts, thereby replacing traditional mechanical bearings with ultra-quiet, high efficiency, high speed / speed and high reliability bearings. , ultra-quiet and other fields have been widely used. The working principle of the magnetic suspension bearing is: through the displacement sensor to detect the displacement feedback of the magnetic suspension bearing rotor in real time, and then through the magnetic suspension controller to control the current injected into the magnetic suspension bearing body in real time, and then control the levitation force to realize the stable suspension of the magnetic suspension bearing rotor. The traditional maglev control algorithm adopts a...

AI Technical Summary

Problems solved by technology

[0004] (2) The high-order displacement regulator needs to set a large number of parameters to achieve the optimal effect, and the setting process is relatively complicated;

[0005] (3) The ability of high-order displacement regulators to suppress disturbance changes is weak, so when external disturbances occur in the system, it will seriously affect the control accuracy and control stiffness of the magnetic suspension bearing

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