A Pure Electromagnetic Radial Magnetic Bearing for Inner Rotor with Plane Magnetic Pole Spherical Surface

Abstract

The invention discloses a plane magnetic pole spherical surface inner rotor pure electromagnetic radial magnetic bearing, which mainly consists of two parts including a stator system and a spherical surface rotor, wherein the stator system mainly comprises a plane magnetic pole stator iron core, a magnet exciting coil, an upper stator locking disc, a lower stator locking device, a stator magneticpole sleeve, a stator magnetic pole sleeve locking disc, an upper sealing ring, a lower sealing ring and a radial magnetic bearing installing framework. The magnetic pole is a plane magnetic pole; therotor is a spherical surface rotor; the electromagnetic force received by the spherical surface rotor passes through the sphere center; when the mass center and the sphere center are overlapped, theinterference of the radial translation suspension on the deflection suspension can be eliminated. Compared with a spherical surface magnetic pole spherical surface rotor structure, the plane magneticpole spherical surface inner rotor pure electromagnetic radial magnetic bearing has the advantages that the space between the edge of the plane stator iron core magnetic pole and the rotor is increased; the magnetic force coupling of a radial passage is reduced; the interference of the radial translation suspension on the axial translation suspension can be reduced; the control precision is further improved; meanwhile, the assembly process difficulty is also reduced.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension radial bearing, in particular to a purely electromagnetic radial magnetic bearing for a plane magnetic pole spherical inner rotor. Background technique [0002] Traditional maglev inertial actuators output torque by changing the rotational speed of the rotor, and are often used for attitude control of high-resolution earth observation satellite platforms. However, the torque is too small and the torque accuracy is low, which is difficult to meet the urgent needs of agile maneuvering of spacecraft. The magnetic levitation control sensitive gyroscope is a new generation of inertial mechanism integrating attitude control and sensitivity with more development potential. It also has high-precision attitude control function and radial two-degree-of-freedom attitude sensitivity function. ideal choice. The magnetic bearing is one of the core components of the magnetic levitation control sensitive gyro...

AI Technical Summary

Problems solved by technology

Due to the existence of pole shoes, the size of the gap between the stator poles is reduced, the assembly manufacturability of the rotor is reduced, and even the rotor cannot be assembled

[0004] The upper and lower edges of the stator poles of the above three radial magnetic bearing schemes are acute angles, and there are obvious magnetic flux leakage effects at the pole edges

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