Patent US4483570A successfully refreshed from Google Patents.
US4483570A
Expired / Lapsed
US
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Magnetic bearing arrangement for an artificial satellite
Assignee: Mitsubishi Electric Corp
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Filing: 1983-02-25
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Granted: 1984-11-20
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Expires: 2003-02-25
Abstract
Abstract A magnetic bearing arrangement for rotor for controlling the attitude of an artificial satellite wherein the rotor has a rotating speed and an axis of rotation which are adjusted in accordance with a change in the attitude of the satellite. The arrangement includes a stator defined by at least three segments, and each stator segment is provided with a permanent magnet to eliminate the necessity of any electromagnet for controlling radial rotor displacement and any sensor for detecting such radial displacement. The apparatus is free from any eddy currents that may cause great resistance to rotation.
Inventors
- 👤 Masao Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0459; F16C32/0461; F16C32/0465; B; B64; B64G; B64G1/00; B64G1/22; B64G1/24; B64G1/32; F16C32/0444; F16C32/0474; F16C32/0485; B64G1/28; F16C2300/00; F16C2300/40; F16C2300/62; F16C2326/00; F16C2326/47
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A magnetic bearing arrangement for controlling the attitude of an artifical satellite having an axis of rotation comprising: a stator having at least three segments, each of said segments being provided with a permanent magnet and an electromagnet for axial control; a rotor disposed for rotation about said axis of rotation and spaced radially outwardly of said stator; and sensor means carried by said stator for detecting any axial displacement of said rotor and controlling actuation of said electromagnet to thereby rectify said axial displacement and simultaneously any inclination of said rotor relative to the axis of rotation of said rotor; said rotor being bifurcated along its inner circumference with said stator being interposed between the axially bifurcated portions of said rotor and with the mutually facing portions of said rotor and said stator being formed with mutually facing recesses having portions on opposite sides thereof which define there-between two gaps which are radially spaced from each other relative to said axis of rotation which serves for the radial position control of said rotor when any radial displacement thereof has occurred.
Claim 2
Dependent Claim
181 words
A magnetic bearing arrangement for controlling the attitude of an artifical satellite having an axis of rotation comprising: a stator having at least three segments, each of said segments being provided with a permanent magnet and an electromagnet for axial control; a rotor disposed for rotation about said axis of rotation and spaced radially outwardly of said stator; and sensor means carried by said stator for detecting any axial displacement of said rotor and controlling actuation of said electromagnet to thereby rectify said axial displacement and simultaneously any inclination of said rotor relative to the axis of rotation of said rotor; said rotor being bifurcated along its inner circumference with said stator being interposed between the axially bifurcated portions of said rotor and with the mutually facing portions of said rotor and said stator being formed with mutually facing recesses having portions on opposite sides thereof which define there-between two gaps which are radially spaced from each other relative to said axis of rotation which serves for the radial position control of said rotor when any radial displacement thereof has occurred.
Claim 3
Dependent Claim
23 words
A magnetic bearing arrangement as set forth in claim 1 wherein each of said permanent magnets is magnetized radially relative to said rotor.
Claim 4
Dependent Claim
23 words
A magnetic bearing arrangement as set forth in claim 1 wherein said stator segments are symmetrical with respect to said axis of rotation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |