US3777198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated coil for arrangement in a slot in the stator or rotor of an electric machine
Assignee: ABB Norden Holding AB
•
Filing: 1972-07-10
•
Granted: 1973-12-04
•
Expires: 1992-07-10
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 polymer and a tape of corona resistant insulating material running longitudinally of the conductor is adhered to the polymer 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 conductors which face the adjacent conductors which parts are situated nearest the sides facing the main insulation.
Inventors
- 👤 A Anderson
- 👤 A Bjorklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
19 words
Conductor as claimed in claim 1, in which said tape comprises two tapes surrounding the first and second sides.
Claim 2
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 3
Dependent Claim
31 words
Conductor as claimed in claim 3, in which said uncovered parts lie on opposite sides of a plane extending longitudinally of the conductor and perpendicular to the third and fourth sides.
Claim 4
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 sides 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.
Claim 5
Dependent Claim
138 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 at least one second side facing the main insulation, the conductor having conductor insulation comprising a prefabricated film of a polymer on the conductor and a tape means of corona-resistant insulating material running in the longitudinal direction of the conductor and attached to the polymer film, the tape means surrounding said 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 6
Dependent Claim
32 words
Coil as claimed in claim 6, in which a resinous binder secures the tape means of insulating material to the polymer film of the conductor along its entire area of contact therewith.
Claim 7
Dependent Claim
19 words
Coil as claimed in claim 6, having a film of flexible plastic outside the tape means of insulating material.
Claim 8
Dependent Claim
93 words
Coil according to claim 6, said tape means comprising a tape of insulating material surrounding said 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 a side of the same conductor positioned opposite to said second side of the said conductor and at least those parts of the first sides of the conductor facing adjacent conductors nearest said side positioned opposite to said second side.
Claim 9
Dependent Claim
57 words
Coil according to claim 9, 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 10
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 6.
Claim 11
Dependent Claim
21 words
Coil as claimed in claim 6 in which said tape means comprises a material from the group of mica and glass.
Claim 12
Dependent Claim
28 words
Coil as claimed in claim 6, in which said tape means comprises a mixture of mica in the form of small flakes and fibers of a linear polymer.
Claim 13
Dependent Claim
13 words
Coil as claimed in claim 13 in which said polymer is a polyamide.
Claim 14
Dependent Claim
60 words
Coil as claimed in claim 6, in which the tape means comprises a single tape surrounding said second side facing the main insulation, one side of the conductor positioned opposite to said second side, one first side and at least those parts of another first side situated nearest said second side and said side positioned opposite to said second side.
References Cited (Backward Citations)
US1784989A
Cited
US2318074A
Cited
US2427749A
Cited
US2436306A
Cited
US2705292A
Cited
US3079519A
Cited
US3287580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |