EP0065147A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of forming electric coils
Assignee: Westinghouse Electric Corp
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Filing: 1982-04-29
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Granted: —
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Expires: 2002-04-29
Abstract
Abstract The invention relates to a method of, generally, providing insulation support for electrical conductors and, more particularly, forming electric coils. Broadly, the invention resides in applying (at 5) a liquid coating of electrical insulation, preferably unfilled resin; partially polymerizing (at 9) the liquid coating, preferably through irradiation from an ultraviolet source; and applying (at 6) a conductor upon the partially polymerized insulation. This sequence is repeated as often as required to provide a desired number of conductor layers, such as winding layers. The finished product thus formed is subsequently fully cured.
Inventors
- 👤 Richard Douglas Buckley
- 👤 Edward Leon Boyd
- 👤 Betty Jane Palmer
- 👤 Dean Conklin Westervelt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:06
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/12; H01F41/122; H01F27/00; H01F27/28; H01F27/32; H01F27/323; H01F5/00; H01F5/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
45 words
A method of providing insulation support for an electrical conductor, characterized by the steps of applying a liquid coating of electrical insulation upon a substrate, gelling the liquid coating to a firmness sufficient to support a conductor, and applying a conductor upon the gelled coating.
Claim 2
Independent Claim
45 words
A method of providing insulation support for an electrical conductor, characterized by the steps of applying a liquid coating of electrical insulation upon a substrate, gelling the liquid coating to a firmness sufficient to support a conductor, and applying a conductor upon the gelled coating.
Claim 3
Dependent Claim
30 words
A method according to claim 1, characterized in that said gelled coating is formed by applying and gelling a plurality of thin liquid layers of insulation one upon the other.
Claim 4
Dependent Claim
54 words
A method according to claim 1 or 2, characterized in that said steps are reiterated, in the sequence stated, to provide insulation support for several conductor layers each of which is applied upon the preceding gelled coating of insulation and serves as a substrate for the succeeding liquid coating to be applied and gelled.
Claim 5
Independent Claim
44 words
A method of forming an electric coil structure, characterized by the steps of applying a liquid coating of electrical insulation upon a substrate, instantly gelling the liquid coating to a firmness sufficient to support a conductor, and winding a conductor upon the gelled coating.
Claim 6
Independent Claim
44 words
A method of forming an electric coil structure, characterized by the steps of applying a liquid coating of electrical insulation upon a substrate, instantly gelling the liquid coating to a firmness sufficient to support a conductor, and winding a conductor upon the gelled coating.
Claim 7
Dependent Claim
30 words
A method according to claim 4, characterized in that said gelled coating is formed by winding and gelling a plurality of thin liquid layers of insulation one upon the other.
Claim 8
Dependent Claim
24 words
A method according to claim 4 or 5, characterized in that said conductor is a pre-insulated strip-like conductor wound spirally upon said gelled coating.
Claim 9
Dependent Claim
41 words
A method according to claim 4, characterized in that said conductor is a strip-like conductor, and that the liquid coating of insulation is applied to the strip-like conductor, and is instantly gelled, as the conductor is being wound spirally in place.
Claim 10
Dependent Claim
20 words
A method according to claim 4, characterized in that said conductor is a wire wound helically upon said gelled coating.
Claim 11
Dependent Claim
81 words
A method according to claim 8, characterized in that said steps are reiterated, in the sequence stated, in such manner that the steps of applying and gelling each liquid coating, except a final one, are followed by a step of helically winding a layer of turns from said wire upon the gelled coating, and each step of winding such layer of turns is followed by the steps of applying upon the latter, and of instantly gelling, a liquid coating of insulation.
Claim 12
Dependent Claim
94 words
A method according to claim 9, characterized in that successive layers of turns are alternately wound axially in opposite directions such that each turns layer intermediate two other turns layers is directly connected at one end to the preceding turns layer and, at its opposite end, is connected to the next-following turns layer, the gelled liquid coating of insulation between each pair of adjacent turns layers being applied in such manner as to have a thickness which gradually increases from the directly connected ends of said adjacent turns layers toward the separated ends thereof.
Claim 13
Dependent Claim
73 words
A method according to claim 10, characterized in that the gelled coating between each pair of adjacent turns layers is formed by applying and instantly gelling liquid layer of insulation upon liquid layer in a manner such as to cause the width of the individual insulation layers, as measured from the separated ends of the adjacent turns layers towards the connected ends thereof, to change incrementally from insulation layer to successive insulation layer.
Claim 14
Dependent Claim
40 words
A method according to claim 11, characterized in that said liquid layers are applied by means of an applicator, and are instantly gelled, simultaneously with rotating the coil and with effecting axial relative movement between the latter and the applicator.
Claim 15
Dependent Claim
23 words
A method according to claim 4, 8, 9 or 10, characterized in that said liquid coating of insulation is extruded from a nozzle.
Claim 16
Dependent Claim
27 words
A method according to claim 13, characterized in that said nozzle has an opening shaped to correspond to the desired cross-section of the applied coating of insulation.
Claim 17
Independent Claim
37 words
A method according to any one of the claims 4 to 14, characterized in that liquid overlaps of said insulation are formed and instantly gelled upon the axially outer edges of each winding formed from the conductor.
Claim 18
Independent Claim
49 words
A method according to any one of the claims 4 to 15, characterized by the steps of introducing, in the applied insulation, strips of a material capable of being subsequently removed, and of removing said strips upon completion of the coil structure to form cooling ducts in the insulation.
Claim 19
Dependent Claim
28 words
A method according to claim 16, characterized in that said material is polyethylene, and that said strips are melted out of the insulation through the application of heat.
Claim 20
Independent Claim
57 words
A method according to any one of the claims 4 to 17, characterized in that the liquid insulation is applied and instantly gelled, and the conductor is wound in place, in a substantially continuous winding operation during which the coil structure is repeatedly rotated sequentially past an insulation applicator, a gelling station, and a conductor winding station.
Claim 21
Independent Claim
20 words
A method according to any one of the preceding claims, characterized in that said insulation is a cross-linkable liquid .resin.
Claim 22
Dependent Claim
22 words
A method according to claim 19, characterized in that said liquid resin is an unfilled resin and is instantly gelled through irradiation.
Claim 23
Independent Claim
36 words
A method according to any of one of the preceding claims, characterized in that the liquid insulation is applied having a viscosity just high enough to prevent undesirable flow of the applied liquid insulation before gelling.
Claim 24
Dependent Claim
29 words
An electric coil structure having at least one electric winding supported in cellulose-free insulation, characterized in that said insulation is a homogenous essentially void-free mass of substantially unfilled resin.
Claim 25
Dependent Claim
29 words
An electric coil structure having at least one electric winding supported in cellulose-free insulation, characterized in that said insulation is a homogenous essentially void-free mass of substantially unfilled resin.
References Cited (Backward Citations)
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