Insulated winding wire articles having conformal coatings
View Patent ↗Insulated winding wire articles and associated formation methods are described. An insulated winding wire article may include a conductor and optional base insulation formed around the conductor. The conductor may be formed into a predefined shape having at least one bend, such as a U-shaped bend. A coating comprising parylene may be formed around the conductor and any base insulation.
1. An article formed from an insulated winding wire, the article comprising:
an insulated winding wire having a cross-sectional area greater than or equal to 0.823mm 2 and formed into a predefined shape comprising at least one bend, the insulated winding wire comprising a conductor and insulation formed around the conductor, the insulation comprising at least one of polyimide or polyamideimide; and
a coating comprising parylene formed around the insulated winding wire, the parylene comprising at least one of parylene HT, parylene AF-4, or parylene F.
2. The article of claim 1 , wherein the coating comprises a thickness between approximately 0.5 μm and approximately 60 μm.
3. The article of claim 1 , wherein the at least one bend comprises a U-shaped bend.
4. The article of claim 1 , wherein the insulation comprises at least one enamel layer.
5. The article of claim 1 , wherein the insulation further comprises an extruded thermoplastic layer, the extruded thermoplastic layer comprising at least one of (i) polyether-ether-ketone, (ii) polyaryletherketone, (iii) polyetheretherketoneketone, (iv) polyetherketoneketone, (v) polyetherketone, (vi) polyetherketoneketoneetherketone, (vii) polyketone (“PK”), (viii) thermoplastic polyimide, (ix) aromatic polyamide, (x) aromatic polyester, or (xi) polyphenylene sulfide.
6. The article of claim 1 , wherein the insulation comprises:
one or more enamel layers; and
an extruded thermoplastic layer formed around the one or more enamel layers.
7. The article of claim 1 , wherein the coating comprises a plurality of parylene-containing layers, each of the plurality of layers comprising a respective parylene material.
8. The article of claim 7 , wherein a first of the plurality of parylene-containing layers comprises a first parylene material comprising at least one of parylene HT, parylene AF-4, or parylene F and a second of the plurality of parylene-containing layers comprises a second parylene material different than the first parylene material.
9. The article of claim 8 , wherein the second parylene material comprises at least one of parylene N, parylene C, parylene D, parylene A, parylene AM, parylene H, parylene SR, parylene HR, parylene NR, parylene CF, or parylene SF.
10. The article of claim 1 , further comprising an adhesion promoter positioned between the insulation and the coating.
11. An insulated winding wire article comprising:
a conductor having a cross-sectional area greater than or equal to 0.823 mm 2 and formed into a predefined shape having at least one bend or twist;
insulation formed around the conductor and comprising at least one layer of enamel, the insulation comprising at least one of polyimide and polyamideimide; and
a coating comprising parylene formed around the conductor, the parylene comprising at least one of parylene HT, parylene AF-4, or parylene F.
12. The article of claim 11 , wherein the coating comprises a thickness between approximately 0.5 μm and approximately 60 μm.
13. The article of claim 11 , wherein the predefined shape comprises a U-shaped bend.
14. The article of claim 11 , wherein the coating comprises a first coating comprising a first parylene material, and further comprising:
a second coating formed around the first coating, the second coating comprising a second parylene material different from the first parylene material.
15. The article of claim 14 , wherein the first parylene material comprises at least one of parylene N or parylene C and the second parylene material comprises at least one of parylene HT, parylene AF-4, or parylene F.
16. The article of claim 11 , wherein the insulation further comprises an extruded thermoplastic layer, the extruded thermoplastic layer comprising at least one of (i) polyether-ether-ketone, (ii) polyaryletherketone, (iii) polyetheretherketoneketone, (iv) polyetherketoneketone, (v) polyetherketone, (vi) polyetherketoneketoneetherketone, (vii) polyketone (“PK”), (viii) thermoplastic polyimide, (ix) aromatic polyamide, (x) aromatic polyester, or (xi) polyphenylene sulfide.