Flat type vertical coil outer rotor hybrid magnetic bearing

Abstract

The invention relates to a flat type vertical coil outer rotor hybrid magnetic bearing which is a four-shaft hybrid magnetic bearing consisting of two vertically symmetrical double-shaft single-edge vertical coil hybrid magnetic bearings, and each double-shaft single-edge vertical coil hybrid magnetic bearing comprises a rotor and a stator, wherein each rotor comprises an outer magnetic permeability ring and a rotor iron core; each stator comprises a stator disk, a plurality of coil iron cores and a plurality of electromagnetic coils, the stator disk comprises a plurality of magnetic poles distributed uniformly; the plurality of coil iron cores are arranged at the outer side of each stator disk and uniformly distributed along the circumference of the stator disk, and each coil iron core corresponds to one magnetic pole; the plurality of electromagnetic coils are respectively and vertically sleeved on a coil iron core; the rotors are arranged at the outer sides of the stators; and a plurality of magnetic poles are connected at the outer edges to form an integral circular ring. In the invention, the two single-edge vertical coil hybrid magnetic bearings are used for forming the four-shaft hybrid magnetic bearing, thus the structure is compacter; and the magnetic poles which are mutually separated in the prior art are connected into an integral circular ring at the outer edges, thereby the eddy-current loss and the block torque are reduced while the rotors run.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a flat four-axis hybrid magnetic bearing structure with a vertical coil and an outer rotor, which can be used as a non-contact support for rotating parts, especially as a high-precision, Low noise attitude control flywheel support mechanism. Background technique [0002] The loss of magnetic bearing is an important comprehensive index, which directly affects its application. Magnetic bearings can be divided into passive magnetic bearings, active magnetic bearings and hybrid magnetic bearings according to the way the magnetic force is provided. The stable domain of passive magnetic bearing is very small; the active magnetic bearing must set the bias current in the electromagnetic coil to provide the operating point for the magnetic bearing, so the control current is large and the power consumption is large; and the hybrid magnetic bearing combines the permanent magneti...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the technical problems of complex magnetic bearing structure, large mass and high energy consumption for the outer rotor magnetic bearing structure, simplify the magnetic bearing structure, reduce the quality of the magnetic bearing, and reduce the energy consumption of the magnetic bearing suspension

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