Insulation-coated electric conductor
View Patent ↗A multilayer insulation-coated electric conductor for a coil constituting a circuit by forming a welded portion in the coil, wherein at least one layer of the multilayer insulation-coating layers of the coated metal conductor is composed of at least one resin selected from the group consisting of a polyimide resin, a polyesterimide resin, and an H-class polyester resin.
1. A multilayer insulation-coated electric conductor to be formed into partial shapes of a coil that are to be joined by welding, comprising:
a conductor made of oxygen free copper or low-oxygen copper with an oxygen content of 30 ppm or lower,
an uppermost insulation layer comprising a polyamideimide resin; and
an under insulation layer adjacent to the uppermost layer, wherein the under insulation layer consists of an H-class polyester resin;
wherein the multilayer insulation-coated electric conductor shows welding temperature resistance at a portion close to a welded portion receiving heat increased to about 1,100° C. or higher during the welding process.
2. The multilayer insulation-coated metal conductor according to claim 1 , comprising a lowermost insulation layer beneath the under insulation layer and adjacent to the metal conductor, wherein the lowermost layer consists of a polyamideimide resin.
3. The multilayer insulation-coated metal conductor according to claim 2 , wherein the metal conductor is made of oxygen free copper or low-oxygen copper with an oxygen content of 15 ppm or lower.
4. The multilayer insulation-coated metal conductor according to claim 2 , wherein a cross-section of the conductor has a shape other than round.
5. The multilayer insulation-coated metal conductor according to claim 2 , wherein the cross-section of the conductor has a rectangular shape.
6. The multilayer insulation-coated metal conductor according to claim 1 , wherein the underlayer is adjacent to the metal conductor.
7. The multilayer insulation-coated metal conductor according to claim 6 , wherein the metal conductor is made of oxygen free copper or low-oxygen copper with an oxygen content of 15 ppm or lower.
8. The multilayer insulation-coated metal conductor according to claim 6 , wherein a cross-section of the conductor has a shape other than round.
9. The multilayer insulation-coated metal conductor according to claim 6 , wherein the cross-section of the conductor has a rectangular shape.
10. A multilayer insulation-coated electric conductor to be formed into partial shapes of a coil that are to be joined by welding, comprising:
a conductor made of oxygen free copper or low-oxygen copper with an oxygen content of 30 ppm or lower,
an uppermost insulation layer consisting of comprising a polyamideimide resin; and
an under insulation layer adjacent to the uppermost layer, wherein the under insulation layer consists of a polyesterimide resin;
wherein the multilayer insulation-coated electric conductor shows welding temperature resistance at a portion close to a welded portion receiving heat increased to about 1,100° C. or higher during the welding process.
11. The multilayer insulation-coated metal conductor according to claim 10 , comprising a lowermost insulation layer beneath the under insulation layer and adjacent to the metal conductor, wherein the lowermost layer consists of a polyamideimide resin.
12. The multilayer insulation-coated metal conductor according to claim 11 , wherein the metal conductor is made of oxygen free copper or low-oxygen copper with an oxygen content of 15 ppm or lower.
13. The multilayer insulation-coated metal conductor according to claim 11 , wherein a cross-section of the conductor has a shape other than round.
14. The multilayer insulation-coated metal conductor according to claim 11 , wherein the cross-section of the conductor has a rectangular shape.
15. The multilayer insulation-coated metal conductor according to claim 10 , wherein the underlayer is adjacent to the metal conductor.
16. The multilayer insulation-coated metal conductor according to claim 15 , wherein the metal conductor is made of oxygen free copper or low-oxygen copper with an oxygen content of 15 ppm or lower.
17. The multilayer insulation-coated metal conductor according to claim 15 , wherein a cross-section of the conductor has a shape other than round.
18. The multilayer insulation-coated metal conductor according to claim 15 , wherein the cross-section of the conductor has a rectangular shape.