Magnetic suspension bearing control system capable of realizing resuspension after destabilization and control method thereof

Abstract

The invention discloses a magnetic suspension bearing control system capable of realizing resuspension after destabilization. Ball bearings are respectively mounted at the positions of two ends of a rotor. Elastic supporting seats sleeve the ball bearings. Protection clearances between slideable supporting seats and the outer rings of the ball bearings can be eliminated after magnetic suspension bearing destabilization. High-frequency vibration possibly generated after the rotor falls is converted into low-frequency vibration in the direction of supporting springs so as to introduce an electromagnetic damping force. If the magnetic suspension bearing control system operates normally according to the judgment, a rotor position control module in a controller is adopted for the magnetic suspension bearing control system; if the magnetic suspension bearing control system operates abnormally according to the judgment, the controller controls the elastic supporting seats to operate, in this like, original high-frequency large-amplitude vibration state is changed into low-frequency larger-amplitude vibration in the direction of the supporting springs; a damping force control module is adopted for controlling the magnetic suspension bearing control system, so that the electromagnetic damping force is applied to the rotor to reduce the vibration amplitude of the rotor; and at last, the damping force control module is converted into the rotor position control module so as to realize resuspension.

Description

technical field [0001] The present invention relates to a magnetic suspension bearing control system and a control method thereof, more specifically, to a magnetic suspension bearing control system and a control method thereof for realizing resuspension after instability. Background technique [0002] The active magnetic suspension bearing system suspends the rotor in the middle of the stator poles through controllable electromagnetic force, so it has the advantages of no friction, no lubrication, no pollution, high speed and long life. At present, active magnetic bearings have been used as an advanced mechatronic product, and have been applied in industrial fields, such as gyroscopes, high-speed motors, bearingless motors, aeroengines, artificial heart pumps, and distributed power generation systems. [0003] In the magnetic bearing system, in order to improve the reliability of the whole system, a set of protective bearings is also needed as a temporary support for the rot...

AI Technical Summary

Problems solved by technology

This method reduces the impact energy of the rotor by reducing the rotor speed, divides the levitation process into each degree of freedom step by step, and continuously detects that the entire recovery levitation process is uncontrollable, and it is very likely that the rotor will not be realized until the rotor speed quickly drops to zero. Resuspension, during which violent collisions between the rotor and protective bearings can cause damage to the rotor or stator

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