Rotating modulation radial spherical permanent-magnet biased magnetic bearing

Abstract

A rotating modulation radial spherical permanent-magnet biased magnetic bearing mainly comprises a stator system, a rotor system and a rotating modulation system, wherein the stator system mainly comprises upper spherical stator cores, lower spherical stator cores, field coils, magnetism isolating rings, upper magnetic-conductive rings, lower magnetic-conductive rings, permanent magnets, a stator sleeve and stator locking nuts; the rotor system mainly comprises spherical rotor cores, a rotor sleeve and rotor locking nuts; and the rotating modulation system mainly comprises a magnetic bearing stator mounting plate, a rotating modulation rotor bearing sleeve, rotating modulation bearings, rotating modulation rotor locking nuts, an ultrasonic motor rotor, an ultrasonic motor stator, a rotating modulation stator bearing sleeve and rotating modulation stator locking nuts. The rotating modulation radial spherical permanent-magnet biased magnetic bearing has the rotating modulation function, the stator is driven to rotate by the ultrasonic motor, and angular rate errors of the rotor, caused by gyro drift, are eliminated, so that the control precision of the magnetic bearing is improved.

Description

technical field [0001] The invention relates to a non-contact radial magnetic suspension bearing, in particular to a permanent magnet offset spherical magnetic bearing with decoupling control of radial translation and radial torsion and rotation modulation function, which can be used as a rotating part in a spacecraft The non-contact support is especially suitable for the non-contact support of the magnetic levitation gyroscope, which can realize the decoupling control of the radial translation and radial torsion of the rotor, and improve the pointing accuracy of the magnetic levitation gyroscope. technical background [0002] With the continuous development of my country's aerospace industry, the requirements for attitude control of satellites, space stations and other spacecraft are getting higher and higher, and there is an urgent need to study attitude control mechanisms with high precision and long life. The magnetic levitation gyroscope is an inertial actuator with lon...

AI Technical Summary

Problems solved by technology

When the magnetic bearing rotor deflects, the air gap between the inner spherical surface of the magnetic bearing stator magnetic pole and the outer spherical surface of the rotor core is not uniform, resulting in unequal electromagnetic force from the stator magnetic pole to the rotor, and the direction does not pass through the magnetic bearing rotor mass center, that is Generate radial torsion interference torque on the magnetic bearing rotor, causing the gyro rotor to deviate from the original position, that is, gyro drift, resulting in reduced gyroscope pointing accuracy

If the detection function of the gyroscope as a sensitive component is to be realized, this disturbance torque will reduce the accuracy of its detection component

Images