US5065060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flywheel type energy storage apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1990-03-05
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Granted: 1991-11-12
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Expires: 2010-03-05
Abstract
Abstract A flywheel type energy storage apparatus for use in an uninterruptible power supply has an induction motor which serves as a generator/motor, in which a rotor (65) of the induction motor is constituted by incorporation of a rotor core (62) and a flywheel (64) with a rotor shaft (56) vertically born by a pivot bearing (55) and a magnetic bearing (67).
Inventors
- 👤 Isao Takahashi
- 👤 Kazuhiko Tanaka
- 👤 Akinori Nishihiro
- 👤 Takeshi Irino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:00
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/02; H02K7/025; F; F16; F16F; F16F15/00; F16F15/30; F16C; F16C2380/00; F16C2380/26; F16C2380/28; F16C39/00; F16C39/06; F16C39/063; Y; Y02; Y02E; Y02E60/00; Y02E60/16; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2117; Y10T74/2119; Y10T74/212
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a rotor, a stator, and a flywheel rotatably supported in said vacuum container by a shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft and which is wound around said rotor.
Claim 2
Dependent Claim
82 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a rotor, a stator, and a flywheel rotatably supported in said vacuum container by a shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft and which is wound around said rotor.
Claim 3
Dependent Claim
38 words
An energy storage apparatus as claimed in claim 1, wherein said shaft is a rotatable shaft fixed to said flywheel for rotation therewith, and wherein said shaft extends within said stator and said rotor extends around said stator.
Claim 4
Dependent Claim
54 words
An energy storage apparatus as claimed in claim 1, wherein said induction motor/generator further includes a needle bearing disposed around said shaft, a pivot bearing disposed beneath said shaft, and a magnet disposed above said flywheel, said needle bearing, said pivot bearing, and said magnet cooperating to maintain a rotational balance of said flywheel.
Claim 5
Dependent Claim
46 words
An energy storage apparatus as claimed in claim 3, wherein said pivot bearing includes a lubricant oil, a high pressure being generated in said lubricant oil when said shaft rotates, such that said shaft floats on a surface of said lubricant oil when said shaft rotates.
Claim 6
Dependent Claim
91 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a flywheel rotatably supported in said vacuum container by a rotatable shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft, a rotor mounted on said flywheel, said rotor including a multiple lamination of ring-shaped ferromagnetic metal sheets, and a stator.
Claim 7
Dependent Claim
91 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a flywheel rotatably supported in said vacuum container by a rotatable shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft, a rotor mounted on said flywheel, said rotor including a multiple lamination of ring-shaped ferromagnetic metal sheets, and a stator.
Claim 8
Dependent Claim
97 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a flywheel rotatably supported in said vacuum container by a rotatable shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft, a rotor mounted on said flywheel, and a stator, wherein said stator includes a multiple lamination of thin ferromagnetic metal sheets having a coil wound thereon.
Claim 9
Dependent Claim
97 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including a flywheel rotatably supported in said vacuum container by a rotatable shaft, said flywheel including a circular winding of wire having a large number of turns which is substantially coaxial with said shaft, a rotor mounted on said flywheel, and a stator, wherein said stator includes a multiple lamination of thin ferromagnetic metal sheets having a coil wound thereon.
Claim 10
Dependent Claim
82 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including: a flywheel rotatably supported in said vacuum container by a rotatable shaft which is fixed to said flywheel for rotation therewith, a rotor mounted on said flywheel, and a stator, said rotatable shaft extending within said stator, and said rotor extending around said stator.
Claim 11
Dependent Claim
82 words
An energy storage apparatus for storing electrical energy as rotational kinetic energy and for outputting said kinetic energy as electrical energy, comprising: a vacuum container; and an induction motor/generator contained in said vacuum container, said induction motor/generator including: a flywheel rotatably supported in said vacuum container by a rotatable shaft which is fixed to said flywheel for rotation therewith, a rotor mounted on said flywheel, and a stator, said rotatable shaft extending within said stator, and said rotor extending around said stator.
Claim 12
Dependent Claim
26 words
An energy storage apparatus as claimed in claim 7, wherein said stator includes a multiple lamination of thin ferromagnetic metal sheets having a coil wound thereon.
Claim 13
Dependent Claim
21 words
An energy storage apparatus as claimed in claim 7, wherein said rotor includes a multiple lamination of ring-shaped ferromagnetic metal sheets.
Claim 14
Dependent Claim
54 words
An energy storage apparatus as claimed in claim 7, wherein said induction motor/generator further includes a needle bearing disposed around said shaft, a pivot bearing disposed beneath said shaft, and a magnet disposed above said flywheel, said needle bearing, said pivot bearing, and said magnet cooperating to maintain a rotational balance of said flywheel.
Claim 15
Dependent Claim
46 words
An energy storage apparatus as claimed in claim 10, wherein said pivot bearing includes a lubricant oil, a high pressure being generated in said lubricant oil when said shaft rotates, such that said shaft floats on a surface of said lubricant oil when said shaft rotates.
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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) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |