Single shaft controlled type five-degrees-of-freedom (DOF) miniature magnetic bearing

A single-axis control, degree of freedom technology, applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems that cannot be applied to occasions with space restrictions, large structural size, and reduce the volume of magnetic bearings, etc., to achieve low power consumption , streamline the structure, reduce the effect of power loss

CN102297202BActive Publication Date: 2013-01-23江阴智产汇知识产权运营有限公司
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-01-23

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a single shaft controlled type five DOF miniature magnetic bearing which is used in working occasions with space constraint requirements. According to the invention, two same flange plates are arranged at left and right above a rotating shaft, and a rotor, two annular stator yokes, an annular axially magnetizing permanent magnet and two axially controlling coils are arranged between the two flange plates; axial air gaps exist between medial surfaces of the flange plates and two transverse planes of the rotor; the stator yokes are fixed arranged at two axial sides of the permanent magnet; the two axially controlling coils are arranged in a cavity formed by the two stator yokes and the two flange plates and are in bilateral symmetry relative to the rotor; a sensor isprovided with at one axial side of the rotating shaft; the permanent magnet generates closed loop static bias flux, and the axially controlling coils generate closed loop axially controlling flux. Passive magnetic bearing and active magnetic bearing are combined in the invention, which enables existing large-size magnetic bearings to be miniaturized; the miniature magnetic bearing provided in theinvention has the advantages of simple construction, low power dissipation, simple control and the like, and enables bearing capacity and working performance to be enhanced and application fields of the bearing to be broadened.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a non-mechanical contact five-degree-of-freedom magnetic bearing, in particular to a five-degree-of-freedom miniature magnetic bearing, which can be used as a magnetic levitation micro-motor, a commercial hard disk drive, a micro-turbine, an artificial heart axial flow pump, and a magnetic levitation storage device for spacecraft. It can be used as a non-contact suspension support for flywheel systems and other workplaces that require high-speed, clean and pollution-free, long-life mechanical equipment, medical equipment, satellites, and miniature rotating parts in spacecraft. Background technique

[0002] The miniature magnetic bearing is a precision mechatronic product that uses the magnetic force between the stator and the rotor to suspend the rotor in space. It is suitable for special occasions such as high speed, ultra-clean and vacuum with limited space. Suspension requires constraints in all five degrees of freedom. [...

Examples

Embodiment Construction

[0016] Such as figure 1 and figure 2 As shown, the present invention consists of 1 permanent magnet 1, 2 identical stator yokes 2, 2 identical flanges 3, 2 identical axial control coils 4, 1 rotor 5, 1 rotating shaft 6 and One sensor 7 is constituted. Two identical flanges 3 are both hollowly sleeved on the rotating shaft 6 and arranged left and right. The flanges 3 are commonly used in a stepped structure, and a rotor 5 and two identical stators are arranged between the two identical flanges 3 A yoke 2, a permanent magnet 1 and two identical axial control coils 4, wherein the rotor 5 is coaxially fixed on the rotating shaft 6, and a circular silicon steel sheet is laminated on the rotating shaft 6, and the two identical There is an axial air gap 10 between the inner surface of the flange 3 and the two end surfaces of the rotor 5 . A permanent magnet 1 is placed above the rotor 5, and the permanent magnet 1 is an annular permanent magnet magnetized in the axial direction, ...