Permanent-magnetic biased axial radial magnetic bearing

Abstract

The permanently magnetic biased axial and radial magnetic bearing as one mixed magnetic bearing includes one axial stator, one axial control winding, two radial magnetized ring permanent magnets, two radial stator with three poles, one radial control winding, and one rotor with jacketed iron core. The permanently magnetic biased axial and radial magnetic bearing has one static bias magnetic field established with two radial magnetized ring permanent magnets, one closed magnetic path formed with one external axial magnetic pole iron core, one rotor iron core and one radial stator, one axial suspension controlled by the axial superposed magnetic flux, and one two freedom suspension controlled by the radial superposed magnetic flux. The present invention has simple structure, high critical rotation speed, low power consumption, and broad application foreground in energy storing flywheel, air conditioner compressor and other high speed application fields.

Description

1. Technical field [0001] The permanent magnetic bias axial radial magnetic bearing of the present invention belongs to the hybrid magnetic bearing in the magnetic bearing. 2. Background technology [0002] Magnetic suspension bearing, also referred to as magnetic bearing for short, is a new type of high-performance bearing that uses the magnetic force between the stator and the rotor to suspend the rotor in space, so that there is no mechanical contact between the stator and the rotor. Because there is no mechanical contact between the stator and the rotor, the rotor of the magnetic suspension bearing can reach a high operating speed, and has the advantages of small mechanical wear, low energy consumption, long life, no lubrication, no pollution, etc., especially suitable for high speed , vacuum and ultra-clean and other special applications. [0003] At present, magnetic bearings are divided into the following types according to the way the magnetic force is provided: The...

AI Technical Summary

Problems solved by technology

[0004] At present, there are two structural forms of permanent magnet bias axial radial magnetic bearings studied internationally. One is to separate the radial magnetic bearing from the axial magnetic bearing, and use the same permanent magnet to provide radial and axial bias. The magnetic flux is set, the axial length of the rotor is long in this structure, and the critical speed of the rotor is low; the other is to integrate the axial and radial directions together, but the rotor is small, which is not conducive to the improvement of the critical speed of the rotor. The two radial degrees of freedom are controlled by two pairs of poles respectively, and the power consumption is relatively high

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