A Control Method Applicable to Rotor Drop Recovery of Horizontal Electromagnetic Bearing

Abstract

The invention discloses a control method applicable to falling restoration of a horizontal type electromagnetic bearing rotor, belongs to the field of electromagnetic bearing control and particularlyrelates to a control method aiming at falling restoration of a large horizontal type electromagnetic bearing rotor. The rotor falling restoration control method which can guarantee the safety of a horizontal type electromagnetic bearing system, makes a rotor not likely to fall off and is high in anti-interference capacity is put forwards according to existing defects. In the method, a sensor transmits a signal to a controller in real time; the controller processes the signal, and performs data information exchange transmission with an upper computer in real time; the controllers generates different control signals and output the control signals through a control algorithm; the different control signals sequentially pass through a power amplifier to generate control currents needed by a coil in an electromagnetic bearing and the control currents are transmitted to the electromagnetic bearing, to be used for controlling the freedom degrees of the rotor in four directions; and the electromagnetic bearing outputs the corresponding electromagnetic force according to different control currents, and then the position of the rotor is controlled. The method is mainly used for falling restoration of the horizontal type electromagnetic bearing rotor.

Description

technical field [0001] The invention belongs to the field of electromagnetic bearing control, and in particular relates to a control method aimed at recovering from falling of a large horizontal electromagnetic bearing rotor. Background technique [0002] Electromagnetic bearings have the advantages of no lubrication, no mechanical contact, maintenance-free and replacement, and active control. They have become ideal bearings for high-speed rotors. The industrial sector has broad application prospects. [0003] However, when the electromagnetic bearing controller works normally, the rotor may have a tendency to drop due to external disturbances. Changes in amplitude and phase of rotor synchronous vibration caused by collision can weaken the ability of electromagnetic bearing controller to control rotor displacement. At present, when the electromagnetic bearing control system is applied, the impact caused by the rotor falling and colliding is rarely considered. [0004] For...

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Problems solved by technology

[0006] Aiming at the defects of the existing horizontal electromagnetic bearing system that is unsafe, the rotor is easy to fall, and the anti-interference ability is poor, the invention proposes a rotor drop recovery that can ensure the safety of the horizontal electromagnetic bearing system, the rotor is not easy to drop, and has strong anti-interference ability Control Method

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