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

A permanent magnet bias, double permanent magnet technology, applied in the directions of magnetic bearings, bearings, shafts and bearings, etc., can solve the problem of reducing gyro torque accuracy, and achieve the effect of reducing magnetic interference, improving control torque accuracy, and avoiding interference.

Active Publication Date: 2015-02-25
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 poin

Method used

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

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specific Embodiment approach

[0019] The preferred embodiment of the double permanent magnet inner rotor permanent magnet offset spherical radial magnetic bearing of the present invention is:

[0020] Including stator system and rotor system, the stator system mainly includes: stator upper spherical core, stator lower spherical core, excitation coil, stator magnetic isolation ring, stator upper magnetic ring, stator lower magnetic ring, stator permanent magnet, stator sleeve Cylinder and stator lock ring; the rotor system mainly includes: rotor upper spherical core, rotor lower spherical core, rotor magnetic isolation ring, rotor upper magnetic ring, rotor lower magnetic ring, rotor permanent magnet, rotor sleeve and rotor lock ring; The upper spherical iron core of the stator forms 4 magnetic poles, the lower spherical iron core of the stator forms 4 magnetic poles, and the upper and lower spherical iron cores of the stator form the 8 magnetic poles at the upper and lower ends of the magnetic bearing, whic...

specific Embodiment

[0028] Such as figure 1 , 2 As shown, a double permanent magnet inner rotor permanent magnet offset spherical radial magnetic bearing is mainly composed of a stator system and a rotor system. It is characterized in that: the stator system mainly includes: stator upper spherical iron core 1, stator lower spherical iron core 2. Excitation coil 3, stator magnetic isolation ring 4, stator upper magnetic ring 5, stator lower magnetic ring 6, stator permanent magnet 7, stator sleeve 8 and stator lock ring 9; the rotor system mainly includes: rotor upper spherical iron core 10. Rotor lower spherical core 11, rotor magnetic isolation ring 12, rotor upper magnetic ring 13, rotor lower magnetic ring 14, rotor permanent magnet 15, rotor sleeve 16 and rotor lock ring 17; stator upper spherical core 1 composes 4 The stator lower spherical core 2 forms 4 magnetic poles, the stator upper spherical core 1 and the stator lower spherical core 2 form 8 magnetic poles at the upper and lower ends...

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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...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0468F16C32/0465F16C32/048
Inventor 刘强任元王卫杰蔡远文樊亚洪缪存孝叶郭波邵琼玲
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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