Patent US6097118A successfully refreshed from Google Patents.
US6097118A
Expired / Lapsed
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Reluctance apparatus for flywheel energy storage
Assignee: UChicago Argonne LLC
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Filing: 1998-10-30
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Granted: 2000-08-01
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Expires: 2018-10-30
Abstract
Abstract A motor generator for providing high efficiency, controlled voltage output or storage of energy in a flywheel system. A motor generator includes a stator of a soft ferromagnetic material, a motor coil and a generator coil, and a rotor has at least one embedded soft ferromagnetic piece. Control of voltage output is achieved by use of multiple stator pieces and multiple rotors with controllable gaps between the stator pieces and the soft ferromagnetic piece.
Inventors
- 👤 John R. Hull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:47
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/06; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/141; H02K19/16; H02K19/22; H02K19/24; H02K7/00; H02K7/02; H02K7/025; Y; Y02; Y02E; Y02E60/00; Y02E60/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A motor generator for supplying a substantially constant output voltage, comprising: a stator comprised of an upper stator piece and a lower stator piece, a motor coil and a generator coil; a rotor having an embedded soft ferromagnetic piece disposed between said upper stator piece and said lower stator piece; and an actuator coupled to said lower stator piece and able to move vertically to enable control of a gap between said lower stator piece and said soft ferromagnetic piece, thereby establishing voltage control through adjusting spacing of the gap.
Claim 2
Dependent Claim
90 words
A motor generator for supplying a substantially constant output voltage, comprising: a stator comprised of an upper stator piece and a lower stator piece, a motor coil and a generator coil; a rotor having an embedded soft ferromagnetic piece disposed between said upper stator piece and said lower stator piece; and an actuator coupled to said lower stator piece and able to move vertically to enable control of a gap between said lower stator piece and said soft ferromagnetic piece, thereby establishing voltage control through adjusting spacing of the gap.
Claim 3
Dependent Claim
70 words
The motor generator as defined in claim 1 wherein said upper and lower stator pieces include a return yoke part and a gap G3 is present between said return yoke part of said upper and lower stator pieces, the gap G3=0 in a motor mode of operation for optimizing torque of said motor generator and in a generator mode of operation said motor generator is operated at minimum operating speed.
Claim 4
Dependent Claim
68 words
A motor generator for supplying a substantially constant output voltage, comprising: a stator comprised of an upper stator piece and a lower stator piece, a motor coil and a generator coil; a rotor having an embedded soft ferromagnetic piece disposed between said upper stator piece and said lower stator piece; and a movable pole piece coupled to the actuator, thereby enabling controlled inductance charges to control output voltage.
Claim 5
Dependent Claim
68 words
A motor generator for supplying a substantially constant output voltage, comprising: a stator comprised of an upper stator piece and a lower stator piece, a motor coil and a generator coil; a rotor having an embedded soft ferromagnetic piece disposed between said upper stator piece and said lower stator piece; and a movable pole piece coupled to the actuator, thereby enabling controlled inductance charges to control output voltage.
References Cited (Backward Citations)
US3700943A
Cited
US3700944A
Cited
US4920291A
Cited
US5191256A
Cited
US5227702A
Cited
US5179307A
Cited
US5406157A
Cited
US5396140A
Cited
US5532532A
Cited
US5719456A
Cited
US5696419A
Cited
US5625241A
Cited
US5625276A
Cited
US5705902A
Cited
US5861695A
Cited
US5844344A
Cited
US5703423A
Cited
US5717316A
Cited
US5742139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |