External rotor radial-axial three freedom degree mixed magnetic bearing

A hybrid magnetic bearing and outer rotor technology, applied in the direction of shaft and bearing, bearing, shaft, etc., can solve the problems of small bearing capacity of magnetic bearing, poor stability of magnetic bearing, etc., to reduce the volume, reduce the volume, and simplify the system control method. Effect

Inactive Publication Date: 2010-08-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The three-degree-of-freedom AC hybrid magnetic bearing proposed in Patent 4 is also a homopolar magnetic bearing, which uses a thin-sheet axial stator, the bearing capacity of the magnetic bearing is small, and the stability of the magnetic bearing is poor

Method used

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  • External rotor radial-axial three freedom degree mixed magnetic bearing
  • External rotor radial-axial three freedom degree mixed magnetic bearing
  • External rotor radial-axial three freedom degree mixed magnetic bearing

Examples

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Embodiment 1

[0027] As shown in Figure 1, an outer rotor radial-axial three-degree-of-freedom hybrid magnetic bearing includes a rotor 1, an axial stator 6 with a two-piece six-pole structure with 2 pieces × 3 poles, a radial stator 4, and a radial stator 4. Direction control coils 51, 52, 53, axial control coils 81, 82 and three permanent magnets 71, 72, 73. Each axial stator 6 on the left and right sides is composed of three axial stator poles 61 , 62 , 63 evenly distributed along the circumference, as shown in FIG. 2 . A radial stator 4 with three magnetic poles evenly distributed along the circumference is located between two axial stators 6 . The three block-shaped circular permanent magnets 71, 72, and 73 are made of high-performance rare earth permanent magnet material NdFeB, have the same shape and size, are radially magnetized, and are embedded in three radial stator poles 41, 42, and 43. The radial and axial biasing fluxes 9 are simultaneously provided in the outer annular groov...

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Abstract

The invention relates to an external rotor radial-axial three degrees of freedom hybrid magnetic bearing, wherein axial stators adopt dual-piece type hexad-pole structures, and each piece consists of three magnetic poles of the axial stators evenly distributed on the circumference; radial stators with the three magnetic poles evenly distributed on the circumference are positioned between two pieces of the axial stators; three blocks of permanent magnets have blocky circular shapes and are charged with magnetism in the radial direction, and the three blocks of the permanent magnets are embedded in circular grooves on the outer sides of the magnetic poles of the radial stators and provide radial and axial biasing magnetic fluxes simultaneously; an axial air gap is formed between the axial stators and a rotor, and a radial air gap is formed between the radial stators and the rotor; axial control coils are close to the axial stators and are placed in the inner sides of the axial stators to provide axial control current by a direct current linear power amplifier; and three radial control coils are wound on three magnetic poles of three radial stators to perform drive control by a three-phase alternating current power inverter. The external rotor radial-axial three degrees of freedom hybrid magnetic bearing greatly reduces the volume of the magnetic bearing, obviously reduces the power consumption, and is applicable to electric principal axis and rotary principal axis systems needing suspending support.

Description

technical field [0001] The invention belongs to the technical field of electromechanical transmission equipment, and relates to the field of magnetic bearings without any mechanical contact, in particular to an outer rotor radial-axial three-degree-of-freedom hybrid magnetic bearing, which is suitable for three-degree-of-freedom suspension of various rotating machines The support can be used as a non-contact suspension support for rotating parts in mechanical equipment such as five-degree-of-freedom magnetic levitation high-speed machine tool spindle systems. Background technique [0002] With the rapid development of magnetic bearing technology in the 1970s, the research on magnetic bearings at home and abroad mainly focused on active magnetic bearings that use DC signals to provide static bias magnetic flux and control magnetic flux at the same time, and focused on the study of active magnetic bearings. Axial single degree of freedom and radial two degree of freedom magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
CPCF16C32/0465F16C32/0485F16C2300/20
Inventor 邬清海朱熀秋
Owner JIANGSU UNIV
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