Radial magnetic bearing structure and multi-degree-of-freedom magnetic levitation mechanism containing same

Abstract

The invention relates to a radial magnetic bearing structure and a multi-degree-of-freedom magnetic levitation mechanism containing the structure. The structure comprises an upper rotator assembly, alower rotator assembly and a stator assembly. The structure is simple, processing is convenient, and the assembly precision is high. The upper rotator assembly and the lower rotator assembly form a high-strength permanent even perpendicular main magnetic field along the axial direction; the magnetic steel surfaces of the upper rotator assembly and the lower rotator assembly are wrapped with a layer of magnetic conductive materials, so an even flat magnetic field with a large occupation rate can be formed in a magnetic gap to achieve the magnetism gathering effect. The stator assembly is of a hollow disc structure and built-in coils in the stator assembly are radially utilized in pairs in the perpendicular even magnetic field to form a couple, so the output force of the coils during motionsin the magnetic gap is even, the linear degree is high, and the high rigidity and low disturbance index requirements of a radial magnetic bearing are realized. The structure solves the difficulty that existing the magnetic force of magnetic bearings is greatly influenced by changes of magnetic gaps and the power consumption is large under large load bearing force and realizes the advantages of good magnetic force linear degree, high rigidity and lower power consumption. The structure belongs to the field of astrovehicle magnetic control systems.

Description

technical field [0001] The invention relates to a radial magnetic bearing structure and a multi-degree-of-freedom magnetic levitation mechanism including the structure, in particular to a Lorentz force radial magnetic bearing, which belongs to non-contact magnetic levitation bearings applied to spacecraft, and can be used as a motor, Non-contact support of rotating parts in mechanical equipment such as swivel joints. The invention belongs to the technical field of spacecraft attitude control systems. Background technique [0002] With the low power consumption, ultra-stable and ultra-quiet requirements put forward by the actuator for magnetic levitation, and it is required that the stator and rotor can still achieve high-performance stable levitation when the relative displacement of the stator and rotor in the magnetic gap occurs, it is urgent to develop a magnetic force linearity within a certain motion gap. Good, low power radial magnetic bearings are used to achieve rad...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a radial magnetic bearing structure and a multi-degree-of-freedom magnetic levitation mechanism including the structure, and solve the problem that the magnetic force of conventional magnetic bearings is greatly affected by the magnetic gap and the large load capacity The problem of high power consumption under force, to achieve the advantages of good linearity of output magnetic force, high stiffness, low power consumption, etc.

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