US3723797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated coil for arrangement in a slot in the stator or rotor of an electrical machine
Assignee: ABB Norden Holding AB
•
Filing: 1970-10-22
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Granted: 1973-03-27
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Expires: 1990-10-22
Abstract
Abstract A coil positioned in the slot of a stator or rotor in an electric machine is formed of a bundle of conductors arranged close together and insulated from each other and from the slot. The conductor insulation consists of a layer of enamel and a tape of corona resistant insulating material running longitudinally of the conductor is adhered to the enamel layer. The tape surrounds the parts of the conductor facing the main insulation which surrounds the bundle of conductors and furthermore overlies at least those parts of the sides of the conductor which face the adjacent conductors which parts are situated nearest the sides facing the main insulation.
Inventors
- 👤 A Andersson
- 👤 A Bjorklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:09
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; H01B3/105; H01B3/04; H02; H02K; H02K3/00; H02K3/32; H02K3/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
134 words
Coil to be arranged in the slot of a stator or rotor in an electric machine, comprising a bundle of conductors arranged close together and provided with conductor insulation to insulate the conductors from each other and main insulation surrounding the bundle to insulate the bundle from the machine slot, the conductors having first sides facing each Other and second sides facing the main insulation, the conductor having conductor insulation comprising a layer of enamel on the conductor and tape means of corona-resistant insulating material running in the longitudinal direction of the conductor and attached to the enamel layer, the tape means surrounding at least one second side of the conductor facing the main insulation and at least those parts of the first sides of the conductor which are situated nearest said second side.
Claim 2
Dependent Claim
134 words
Coil to be arranged in the slot of a stator or rotor in an electric machine, comprising a bundle of conductors arranged close together and provided with conductor insulation to insulate the conductors from each other and main insulation surrounding the bundle to insulate the bundle from the machine slot, the conductors having first sides facing each Other and second sides facing the main insulation, the conductor having conductor insulation comprising a layer of enamel on the conductor and tape means of corona-resistant insulating material running in the longitudinal direction of the conductor and attached to the enamel layer, the tape means surrounding at least one second side of the conductor facing the main insulation and at least those parts of the first sides of the conductor which are situated nearest said second side.
Claim 3
Dependent Claim
32 words
Coil as claimed in claim 1, in which a resinous binder secures the tape means of insulating material to the enamel layer of the conductor along its entire area of contact therewith.
Claim 4
Dependent Claim
18 words
Coil as claimed in claim 1, having film of flexible plastic outside the tape means of insulating material.
Claim 5
Dependent Claim
85 words
Coil according to claim 1, said tape means comprising a tape of insulating material surrounding only one second side of the conductor facing the main insulation and at least those parts of the first sides of the conductor facing adjacent conductors situated nearest this second side, and a second tape of insulating material surrounding another second side of the said conductor facing the main insulation and at least those parts of the first sides of the conductor facing adjacent conductors nearest said other second side.
Claim 6
Dependent Claim
57 words
Coil according to claim 4, the edges of the two tapes terminating on one first side of the conductor being displaced laterally in relation to the edges of the two tapes on the other first side of the adjacent conductor facing the first conductor so that at least one layer of tape is present between the conductors.
Claim 7
Dependent Claim
23 words
Electrical machine having a stator or rotor with a slot therein, and having in said slot a coil as claimed in claim 1.
Claim 8
Dependent Claim
21 words
Coil as claimed in claim 1, in which said tape means comprises a material from the group of mica and glass.
Claim 9
Dependent Claim
28 words
Coil as claimed in claim 1, in which said tape means comprises a mixture of mica in the form of small flakes and fibers of a linear polymer.
Claim 10
Dependent Claim
13 words
Coil as claimed in claim 7, in which said polymer is a polyamide.
Claim 11
Dependent Claim
42 words
Coil as claimed in claim 1, in which the tape means surrounds the other second side of the conductor facing the main insulation and at least those parts of the first sides of the conductor which are situated nearest said second side.
Claim 12
Dependent Claim
69 words
Insulated electrical conductor having substantially rectangular cross-section, in which the insulation comprises a layer of enamel on the conductor and tape of corona-resistant insulating material attached to the enamel layer and running parallel to the longitudinal axis of the conductor, said tape surrounding first and second opposite sides of the conductor and overlying at least those parts of the third and fourth sides adjacent the first and second sides.
Claim 13
Dependent Claim
69 words
Insulated electrical conductor having substantially rectangular cross-section, in which the insulation comprises a layer of enamel on the conductor and tape of corona-resistant insulating material attached to the enamel layer and running parallel to the longitudinal axis of the conductor, said tape surrounding first and second opposite sides of the conductor and overlying at least those parts of the third and fourth sides adjacent the first and second sides.
Claim 14
Dependent Claim
19 words
Conductor as claimed in claim 1, in which said tape comprises two tapes surrounding the first and second sides.
Claim 15
Dependent Claim
26 words
Conductor as claimed in claim 2, in which said two tapes overly parts only of the third and fourth sides, leaving parts of said sides uncovered.
Claim 16
Dependent Claim
31 words
Conductor as claimed in claim 3, in which such uncovered parts lie on opposite sides of a plane extending longitudinally of the conductor and perpendicular to the third and fourth sides.
Claim 17
Dependent Claim
63 words
Conductor as claimed in claim 2, in which the edges of the parts of the tapes overlying one of the third and fourth faces lie on the opposite side of a plane extending longitudinally of the conductor and perpendicular to the third and fourth sides from the edges of the parts of the tapes overlying the other of the third and fourth sides.
References Cited (Backward Citations)
US753461A
Cited
US2269185A
Cited
US2479417A
Cited
FR1076646A
Cited
US3098113A
Cited
DE1128900B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |