Double-permanent magnet inner-rotor permanent magnet biased spherical radial magnetic bearing

Abstract

The invention discloses a double-permanent magnet inner-rotor permanent magnet biased spherical radial magnetic bearing which comprises two parts, namely a stator system and a rotor system, wherein the stator system mainly comprises a stator upper spherical iron core, a stator lower spherical iron core, an exciting coil, a stator magnetic-insulating ring, a stator upper magnetic-conductive ring, a stator lower magnetic-conductive ring, a stator permanent magnet, a stator sleeve and a stator locking ring; the rotor system mainly comprises a rotor upper spherical iron core, a rotor lower spherical iron core, a rotor magnetic-insulating ring, a rotor upper magnetic-conductive ring, a rotor lower magnetic-conductive ring, a rotor permanent magnet, a rotor sleeve and a rotor locking ring; the stator upper spherical iron core forms four magnetic poles, the stator lower spherical iron core forms four magnetic poles, the stator upper spherical iron core and the stator lower spherical iron core form eight magnetic poles of the upper end and lower end of the magnetic bearing, the magnetic poles respectively form spherical magnetic poles in positive and negative directions of an X axis and a Y axis, and the exciting coil is wound on each stator magnetic pole. The double-permanent magnet inner-rotor permanent magnet biased spherical radial magnetic bearing disclosed by the invention prevents the disturbance of radial translation control on radial twisting control, can be used for reducing the magnetic interference of self residual magnetism on the outside, can be taken as the non-contact support of rotary parts, namely a magnetic suspension universal momentum wheel and the like, for space, and can be used for enhancing the accuracy of the control moment of the momentum wheel.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a double permanent magnet inner rotor permanent magnet bias spherical radial magnetic bearing. Background technique [0002] The pure electromagnetic magnetic bearing uses the bias current to provide the bias magnetic field, and the coil winding current is relatively large, resulting in large power consumption of the magnetic bearing. The permanent magnetic bias hybrid magnetic bearing uses the permanent magnetic field generated by the permanent magnet to provide the bias magnetic field, replacing the bias magnetic field generated by the bias current in the pure electromagnetic magnetic bearing, which can greatly reduce the control current of the magnetic bearing and reduce the power consumption of the power amplifier. Reduce the size of the magnetic bearing and increase the bearing capacity. Therefore, permanent magnet bias magnetic bearings are widely used in high-s...

AI Technical Summary

Problems solved by technology

When the inertial axis of the flywheel rotor deflects with the geometric axis of the magnetic bearing stator, the electromagnetic attraction forces in the 8 magnetic pole surfaces of the magnetic bearing are not equal, and none of them point to the center of mass of the flywheel rotor, which will generate radial torsional interference torque on the flywheel rotor, reducing the Accuracy of gyro torque generated by magnetic levitation universal momentum wheel micro-frame effect

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