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Low-loss mixed excitation internal rotor radial magnetic-suspension bearing

A hybrid excitation and magnetic bearing technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of small axial length of permanent magnet magnetic rings, difficult processing and assembly, etc., to achieve low magnetic circuit reluctance and reduce loss. , The effect of improving the linearity of the current control characteristic

Inactive Publication Date: 2006-03-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The axial length of the permanent magnetic ring of this structure is very small, and it is very difficult to process and assemble

Method used

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  • Low-loss mixed excitation internal rotor radial magnetic-suspension bearing
  • Low-loss mixed excitation internal rotor radial magnetic-suspension bearing

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Embodiment Construction

[0016] figure 1 and figure 2 The longitudinal section and cross-sectional view of the hybrid excitation inner rotor radial magnetic bearing of the present invention are given respectively. The stator magnetic sleeve is divided into left and right parts. The left magnetic sleeve is composed of the stator magnetic sleeve 16 placed outside the stator non-magnetic sleeve 15; the right magnetic sleeve is composed of the magnetic sleeve 2 placed on the non-magnetic sleeve. 3 outside structure, a permanent magnet ring 1 is embedded in the middle of the magnetic sleeve, and the magnetization direction of the permanent magnet ring is axial magnetization. Under the premise of ensuring that the magnetic density of the air gap permanent magnet bias remains unchanged, the size of the magnetic ring and the working air gap bias magnetic field can be adjusted by adjusting the thickness ratio of the non-magnetic sleeve and the magnetic sleeve, so that the permanent magnetic ring can be easil...

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PUM

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Abstract

A low loss mixed excitation rotor radial magnetic bearing, which contains rotor and rotor, wherein the stator containing right and left magnet conducting lining composed of magnet conducting lining and non magnet conducting lining, permanent magnet cup, left and right stator iron core and electric excitation windings. Said invention has advantages of quick response speed, low excitation loss and easy assembling.

Description

1. Technical field [0001] The hybrid excitation inner rotor radial magnetic bearing of the invention belongs to the inner rotor radial magnetic bearing of the non-contact magnetic bearing type. 2. Background technology [0002] Magnetic suspension bearings (referred to as magnetic bearings) can be divided into three types: electric excitation magnetic bearings, permanent magnet excitation magnetic bearings and hybrid excitation magnetic bearings (permanent magnet and electric excitation hybrid) according to the way the magnetic force is provided. Electrically excited magnetic bearings have the disadvantages of large current, large power consumption, and poor linearity of force-current control characteristics. Permanent magnetic bearings are passive magnetic bearings, which have the advantage of low power consumption, but poor control accuracy. [0003] The hybrid excitation magnetic bearing uses the permanent magnetic field as the bias magnetic field, which reduces the copp...

Claims

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Application Information

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IPC IPC(8): F16C32/04
Inventor 朱德明严仰光王慧贞张方华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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