US5880544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flywheel-type power storage device
Assignee: Eneos Corp
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Filing: 1997-04-28
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Granted: 1999-03-09
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Expires: 2017-04-28
Abstract
Abstract A flywheel-type power storage device comprises a coreless synchronous and outer rotor-type motor and a flywheel. The motor comprises a stator provided with a stator winding having a cylindrical portion, and a rotor having inner and outer field members constituting therebetween a field gap in which the cylindrical portion is positioned. At least one of the inner and outer field members comprises a permanent magnet. A bearing is provided between the stator and the rotor so as to rotatably support the rotor against said stator. The stator is separated into a bearing portion constituting the bearing and a stator body provided with the stator winding. The bearing portion is supported via an elastic member by the stator body. The flywheel is fixed on the outer side of the outer field member.
Inventors
- 👤 Tetsufumi Ikeda
- 👤 Takahiko Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/30; F16F15/315; H; H02; H02K; H02K21/00; H02K21/12; H02K21/22; H02K29/00; H02K29/06; H02K7/00; H02K7/02; H02K7/025; Y; Y02; Y02E; Y02E60/00; Y02E60/16; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2117; Y10T74/2119
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
196 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding including a plurality of sets of three-phase windings, and having a cylindrical portion; said sets of three phase windings being isolated from each other; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator, and including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that an elastic moduli/density increases in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 2
Dependent Claim
196 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding including a plurality of sets of three-phase windings, and having a cylindrical portion; said sets of three phase windings being isolated from each other; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator, and including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that an elastic moduli/density increases in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 3
Dependent Claim
182 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wherein at least one of said inner and outer field members is a permanent magnet; and wire portions located in said cylindrical portion and each of said wire portions wound in parallel to a rotation axis of said rotor; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that said flywheel has increasing elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 4
Dependent Claim
182 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wherein at least one of said inner and outer field members is a permanent magnet; and wire portions located in said cylindrical portion and each of said wire portions wound in parallel to a rotation axis of said rotor; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that said flywheel has increasing elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 5
Dependent Claim
180 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that said flywheel has increasing elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 6
Dependent Claim
180 words
A flywheel-type power storage device including a coreless-type rotary electrical machine comprising: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; a flywheel positioned outside said outer field member and made of a fiber-reinforced plastic material having reinforcing fibers; and said reinforcing fibers are disposed circumferentially about said flywheel such that said flywheel has increasing elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 7
Dependent Claim
136 words
A flywheel-type power storage device including a coreless-type rotary electrical machine which comprises: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wherein at least one of said inner and outer field members is a permanent magnet; wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; and a flywheel positioned outside said outer field member.
Claim 8
Dependent Claim
136 words
A flywheel-type power storage device including a coreless-type rotary electrical machine which comprises: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding having a cylindrical portion; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wherein at least one of said inner and outer field members is a permanent magnet; wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator; said bearing means including a bearing housing supported via an elastic member by said stator frame; and a flywheel positioned outside said outer field member.
Claim 9
Dependent Claim
57 words
A flywheel-type power storage device according to claim 4, wherein: said flywheel is made of a fiber-reinforced plastic material; said plastic material having reinforcing fibers; said reinforcing fibers being disposed circumferentially about said flywheel and having higher elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 10
Dependent Claim
53 words
A flywheel-type power storage device according to claim 5, wherein: said bearing means includes an oil pressure control system; said oil pressure control system including an oil and a spool to bear said rotor in a thrust direction so as to maintain said rotor in said thrust direction at a predetermined equilibrium position.
Claim 11
Dependent Claim
35 words
A device according to claim 4, wherein said stator winding has crossover tracks at both ends and through which a wire extended from each of said wire portions is connected to a next wire portion.
Claim 12
Dependent Claim
31 words
A device according to claim 5, wherein said reinforcing fibers are at least one member selected from the group consisting of a carbon fiber, a glass fiber and an aramid fiber.
Claim 13
Dependent Claim
36 words
A device according to claim 5, wherein said reinforcing fibers comprise carbon fibers having an elastic moduli increasing in said radial direction from said inner portion of said flywheel to said outer portion of said flywheel.
Claim 14
Dependent Claim
21 words
A flywheel-type power storage device according to claim 6, wherein said flywheel-type power storage device is disposed in a vacuum container.
Claim 15
Dependent Claim
24 words
A flywheel-type power storage device according to claim 10, wherein said stator has a pipe extending outside said vacuum container for passing cooling water.
Claim 16
Dependent Claim
154 words
A flywheel-type power storage device including a coreless-type rotary electrical machine which comprises: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding including a plurality of sets of three-phase windings, and having a cylindrical portion; said sets of three phase windings being isolated from each other; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator, and including a bearing housing supported via an elastic member by said stator frame; and a flywheel positioned outside said outer field member.
Claim 17
Dependent Claim
154 words
A flywheel-type power storage device including a coreless-type rotary electrical machine which comprises: a stator including a stator frame; a stator winding fixed to said stator frame; said stator winding including a plurality of sets of three-phase windings, and having a cylindrical portion; said sets of three phase windings being isolated from each other; a rotor having inner and outer field members constituting therebetween a field gap in which said cylindrical portion is positioned, wire portions located in said cylindrical portion and each of said wire portions wound in parallel to an axis of said rotor, wherein at least one of said inner and outer field members is a permanent magnet; a bearing means provided between said stator and said rotor so as to rotatably support said rotor against said stator, and including a bearing housing supported via an elastic member by said stator frame; and a flywheel positioned outside said outer field member.
Claim 18
Dependent Claim
24 words
A flywheel-type power storage device according to claim 12, further comprising a sensor means for detecting a rotation position or angle of said rotor.
Claim 19
Dependent Claim
35 words
A device according to claim 12, wherein said stator winding has crossover tracks at both ends and through which a wire extended from each of said wire portions is connected to a next wire portion.
Claim 20
Dependent Claim
56 words
A device according to claim 12, said wherein: said flywheel is made of a fiber reinforced plastic material; said plastic material having reinforcing fibers; said reinforcing fibers being disposed circumferentially about said flywheel and having higher elastic moduli/density in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 21
Dependent Claim
32 words
A flywheel-type power storage device according to claim 13, further comprising an inverter for converting dc voltages to three-phase ac voltages, effective to apply said three-phase ac voltages to said three-phase windings.
Claim 22
Dependent Claim
62 words
A flywheel-type power storage device according to claim 16, wherein said stator has n three-phase windings driven with ac voltage waves; and a phase delay between said ac voltage waves to be applied to a first three-phase winding an i-th three-phase winding being 120° (i-1)/n; wherein n is an integer greater than 1, and i is an integer of 1 to n.
Claim 23
Dependent Claim
57 words
A flywheel-type power storage device according to claim 17, wherein: said flywheel is made of a fiber-reinforced plastic material; said plastic material having reinforcing fibers; said reinforcing fibers being disposed circumferentially about said flywheel and having higher elastic moduli in a radial direction from an inner portion of said flywheel to an outer portion of said flywheel.
Claim 24
Dependent Claim
53 words
A flywheel-type power storage device according to claim 18, wherein: said bearing means includes an oil pressure control system; said oil pressure control system including an oil and a spool to bear said rotor in a thrust direction so as to maintain said rotor in said thrust direction at a predetermined equilibrium position.
Claim 25
Dependent Claim
31 words
A device according to claim 18, wherein said reinforcing fibers are at least one member selected from the group consisting of a carbon fiber, a glass fiber and an aramid fiber.
Claim 26
Dependent Claim
37 words
A device according to claim 18, said wherein said reinforcing fibers comprise carbon fibers having an elastic moduli increasing in said radial direction from said inner portion of said flywheel to said outer portion of said flywheel.
Claim 27
Dependent Claim
21 words
A flywheel-type power storage device according to claim 19, wherein said flywheel-type power storage device is disposed in a vacuum container.
Claim 28
Dependent Claim
24 words
A flywheel-type power storage device according to claim 22, wherein said stator has a pipe extending outside said vacuum container for passing cooling water.
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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) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |