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Permanent-magnetic biased axial magnetic bearing

A technology of axial magnetic bearing and permanent magnet bias, which is applied in the direction of shafts and bearings, bearings, engine components, etc., can solve the problems of high power consumption and difficulty in radial torsion control, and achieve low power consumption and reduced Effects of power consumption and axial size reduction

Inactive Publication Date: 2007-10-17
BEIHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

In short, the existing axial magnetic bearings have the disadvantages of high power consumption, inability to control radial torsion, and difficult to meet the axial length requirements of magnetic levitation flywheels

Method used

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  • Permanent-magnetic biased axial magnetic bearing
  • Permanent-magnetic biased axial magnetic bearing
  • Permanent-magnetic biased axial magnetic bearing

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Embodiment Construction

[0013]As shown in Fig. 2 and Fig. 3, the present invention is made up of stator part and rotor 1, and stator part is made up of 4 groups of stator cores 4, permanent magnet 3 and coil 5, and 4 groups of stator cores 4 constitute 8 stators on the whole circumferential direction The magnetic poles of the stator core are placed along the directions of +X, -X, +Y, and -Y. In order to increase the cross-sectional area of ​​the magnetic poles of the stator core to improve the bearing capacity of the axial magnetic bearing, the area of ​​the magnetic poles of the stator core is made into an arc surface. A coil 5 is wound on each stator core pole, an axial magnetic air gap 6 is formed between the stator part and the rotor, an arc-shaped permanent magnet 3 is placed between the two stator core poles in each set of stator cores 4, and the permanent The magnets 3 and the two stator core poles of each set of stator cores 4 form a second air gap 2 on the outside in the radial direction. Th...

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Abstract

A permanent magnet biased axial magnetic bearing is composed of a stator and a rotor, the stator is composed of four group of stator cores, a permanent magnet and windings, the four group of stator cores compose eight stator poles on circumference direction and are put along +X, -X, +Y, -Y direction, each stator core pole is winded with a winding. An axial magnetic gas gap is formed between the stator and the rotor, an arc permanent magnet is put between two stator core poles in each group of stator core, and a second gas gap is formed on the radial outside by the permanent magnet and two stator core poles of each group of stator core. The invention can realize the axial movement and radial twist control for the magnetic suspension rotor by the four group of stator cores distributed in +X, -X, +Y, -Y direction, and can greatly reduce the axial size of the system. The axial magnetic bearing also has the advantages of low power consume, reliable property and convenient control.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, especially a permanent magnetic bias axial magnetic bearing, which can be used as a non-contact support for rotating parts in spacecraft such as micro satellites, and is especially suitable for magnetic suspension flywheels and magnetic suspension control moment gyroscopes Non-contact support. Background technique [0002] Commonly used magnetic suspension bearings are divided into electromagnetic bias type and permanent magnetic bias plus electromagnetic control hybrid magnetic suspension bearing. The former uses current to generate a bias magnetic field, so the working current is large and the power consumption is large. The latter uses permanent magnets instead of current to generate a bias magnetic field. , The magnetic field generated by the permanent magnet bears the main bearing capacity, and the electromagnetic field provides the auxiliary adjustment bearing capacity, so this k...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0485F16C2361/55
Inventor 孙津济房建成刘虎王曦刘刚杨磊
Owner BEIHANG UNIV
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