Patent EP0362881A2 successfully refreshed from Google Patents.
EP0362881A2
Expired / Lapsed
EP
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Magnetic bearing device
Assignee: Nippon Ferrofluidics Corp
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Filing: 1989-10-06
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Granted: —
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Expires: 2009-10-06
Abstract
Abstract The invention relates to am agnetic bearing device comprising a rotary main shaft (1), an armature disk (2) mounted on said rotary main shaft (1), and a pair of bearing elements (3) disposed on opposite sides in the axial direction of said armature disk (2), each of said bearing elements (3) comprising a control coil (7) provided with a pair of pole pieces (5, 6) the top end of each of said pole pieces (5, 6) being disposed near said armature disk (2), and said pole pieces (5, 6) being provided with a sensor coil (8) at a position nearer the front end side than said control coil (7).
Inventors
- 👤 Akira Yamamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:52
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0459; F16C32/0461; F16C32/0465; F16C32/0444; F16C32/0446; F16C32/0448; F16C32/0474; F16C32/0476
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A magnetic bearing device comprising a rotary main shaft (1), an armature disk (2) mounted on said rotary main shaft (1), and a pair of bearing elements (3) disposed on opposite sides in the axial direction of said armature disk (2), each of said bearing elements (3) comprising a control coil (7) provided with a pair of pole pieces (5, 6) the top end of each of said pole pieces (5, 6) being disposed near said armature disk (2), and said pole pieces (5, 6) being provided with a sensor coil (8) at a position nearer the front end side than said control coil (7).
Claim 2
Dependent Claim
105 words
A magnetic bearing device comprising a rotary main shaft (1), an armature disk (2) mounted on said rotary main shaft (1), and a pair of bearing elements (3) disposed on opposite sides in the axial direction of said armature disk (2), each of said bearing elements (3) comprising a control coil (7) provided with a pair of pole pieces (5, 6) the top end of each of said pole pieces (5, 6) being disposed near said armature disk (2), and said pole pieces (5, 6) being provided with a sensor coil (8) at a position nearer the front end side than said control coil (7).
Claim 3
Dependent Claim
35 words
The device of claim 1, wherein the displacement of said main shaft (1) is differentially outputted by a pair of sensor coils (8) disposed on opposite sides in axial direction of said armature disk (2).
References Cited (Backward Citations)
No citation records indexed.
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