Thrust magnetic bearing for bias compensation
AssigneeKorea Institute of Machinery & Materials
InventorsCheol-hoon PARK, Sang-Kyu Choi, Sang-Yong Ham
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Abstract
The present invention relates to a thrust magnetic bearing for bias compensation, and more particularly, to a thrust magnetic bearing for bias compensation in which annular permanent magnets and electromagnets are disposed to face each other with respect to a levitated member and the permanent magnets are formed to be asymmetrical in lengths thereof in an axial direction to thus exert an attractive force for compensating for a bias by the difference in the lengths of the permanent magnets in the axial direction to compensate for the bias, and a current supply for bias magnetic flux is not required, saving energy.
Claims4
A thrust magnetic bearing in which a rotor is supported by enabling a plate-like levitated member protruding in a direction perpendicular to a rotational shaft to float by means of the rotational shaft, the rotor including the rotational shaft, and an annular magnet unit surrounding the rotational shaft,
- wherein the magnet unit comprises:
- a first magnet unit having a first annular electromagnet provided on one surface and spaced apart from the levitated member by a predetermined distance and a first annular permanent magnet provided on one side of the first electromagnet;
- and
- a second magnet unit having a second annular electromagnet provided in a position facing the first electromagnet on the other surface with respect to the levitated member and a second annular permanent magnet provided in a position facing the first permanent magnet.
Dependencies are inferred from the claim text.