Magnetic bearing apparatus with axial pole segments
AssigneeEbara Corporation
InventorsYu Kakesu, Kunihiko Tanaka, Toshimitsu Barada
Life of this patent
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Abstract
A magnetic bearing apparatus capable of correcting inclination of a rotating element with a small magnetic attractive force and capable of stably supporting the rotating element is disclosed. The magnetic bearing apparatus includes: a non-magnetic ring made of non-magnetic material; and at least three axial magnetic poles arranged along a circumferential direction of the non-magnetic ring. Each axial magnetic pole has an arc-shaped coil and a coil housing that accommodates the coil therein. The at least three axial magnetic poles are fixed to the non-magnetic ring.
Claims9
A magnetic bearing apparatus for supporting a rotating element in a non-contact manner, comprising:
- a non-magnetic ring made of non-magnetic material;
- and
- at least three axial magnetic poles arranged along a circumferential direction of the non-magnetic ring, the at least three axial magnetic poles having a plurality of arc-shaped coils and a plurality of coil housings that accommodate the plurality of coils therein, respectively, the at least three axial magnetic poles being fixed to the non-magnetic ring,
- wherein the plurality of coil housings have a plurality of arc-shaped outer walls around which the plurality of arc-shaped coils are wound, respectively, and a plurality of arc-shaped inner walls arranged radially inwardly of the plurality of arc-shaped outer walls, respectively, and
- wherein the plurality of arc-shaped inner walls are separated from each other, and gaps are formed between the plurality of arc-shaped inner walls,
- wherein the plurality of coil housings have a plurality of arc-shaped base plates coupled to the plurality of arc-shaped outer walls and the plurality of arc-shaped inner walls,
- wherein the plurality of arc-shaped base plates are separated from each other, and gaps are formed between the plurality of arc-shaped base plates, and
- wherein the plurality of coil housings are fixed to the non-magnetic ring,
- wherein the plurality of coil housings have a plurality of flanges protruding radially inwardly from the plurality of arc-shaped inner walls, the plurality of flanges are fixed to the non-magnetic ring, the plurality of flanges are separated from each other, and gaps are formed between the plurality of flanges.
A magnetic bearing apparatus for supporting a rotating element in a non-contact manner, comprising:
- a non-magnetic ring made of non-magnetic material;
- and
- at least three axial magnetic poles arranged along a circumferential direction of the non-magnetic ring, the at least three axial magnetic poles having a plurality of arc-shaped coils and a plurality of coil housings configured to accommodate the plurality of coils therein, respectively, the at least three axial magnetic poles being fixed to the non-magnetic ring,
- wherein the plurality of coil housings have a plurality of arc-shaped inner walls around which the plurality of arc-shaped coils are wound, respectively, and a plurality of arc-shaped outer walls arranged radially outwardly of the arc-shaped inner walls, respectively,
- wherein the plurality of arc-shaped outer walls are separated from each other and gaps are formed between the plurality of arc-shaped outer walls, and wherein the plurality of coil housings are fixed to the non-magnetic ring,
- wherein the plurality of coil housings have a plurality of flanges protruding radially outwardly from the plurality of arc-shaped outer walls, the plurality of flanges are fixed to the non-magnetic ring, the plurality of flanges are separated from each other, and gaps are formed between the plurality of flanges.
Dependencies are inferred from the claim text.