Rotor hybrid magnetic bearing in flat horizontal coil

Abstract

The invention relates to a rotor hybrid magnetic bearing in a flat horizontal coil, in particular to a four-axis hybrid magnetic bearing formed by two-axis single-side horizontal coil hybrid magnetic bearings which are symmetrically arranged up and down. Either two-axis single-side horizontal coil hybrid magnetic bearing comprises a rotor and a stator, wherein the rotor comprises an inner magnet-conducting ring and a rotor iron core which is coaxially sleeved at the outer side of an outer magnet-conducting ring; the stator comprises a stator disc, a magnet-conducting cover plate and a plurality of electromagnetic coils, the stator disc comprises a plurality of evenly distributed magnetic electrodes, the magnet-conducting cover plate is arranged at the outer side of the stator disc, the plurality of the electromagnetic coils are respectively and horizontally sleeved on the magnet-conducting cover plate, each electromagnetic coil corresponds to the position of one magnetic electrode, the rotor is sleeved at the inner side of the stator; and the inner edges of the plurality of magnetic electrodes are connected into a whole ring. According to the invention, a four-axis magnetic bearing is formed by adopting two single-side coil two-axis magnetic bearings, thus the structure is compacter; and the magnetic electrodes which are mutually separated in the prior art are connected at theinner edges into the whole ring to reduce the eddy current loss and the block moment of the rotor in operation.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a flat four-axis hybrid magnetic bearing with a horizontal coil and an inner rotor, which can be used as a non-contact support for rotating parts, especially as a space system with high precision and 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 perm...

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 inner 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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