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US 9,012,781 B2Granted
Electrical transmission cables with composite cores
AssigneeSouthwire Company
InventorsAllan Daniel, Paul Springer, Yuhsin Hawig, Mark Lancaster, David W. Eastep, Sherri M. Nelson, Tim Tibor, Tim Regan, Michael L. Wesley
Life of this patent
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Abstract
The present invention discloses electrical cables containing a cable core and a plurality of conductive elements surrounding the cable core. The cable core contains at least one composite core, and each composite core contains a rod which contains a plurality of unidirectionally aligned fiber rovings embedded within a thermoplastic polymer matrix, and surrounded by a capping layer.
Claims20
An electrical cable comprising:
- (a) a cable core comprising at least one composite core, the composite core comprising:
- (i) at least one rod comprising a plurality of consolidated thermoplastic impregnated rovings, the rovings comprising continuous fibers oriented in the longitudinal direction and a thermoplastic matrix that embeds the fibers, the fibers having a ratio of ultimate tensile strength to mass per unit length of greater than about 1,000 MPa/g/m, wherein the rod comprises from about 25 wt. % to about 80 wt. % fibers and from about 20 wt. % to about 75 wt. % thermoplastic matrix;
- and
- (ii) a capping layer surrounding the at least one rod, wherein the capping layer is free of continuous fibers;
- wherein the composite core has a flexural modulus of at least about 10 GPa;
- and
- (b) a plurality of conductive elements surrounding the cable core.
4 more elements
An electrical cable comprising:
- (a) a cable core comprising at least one composite core, the composite core comprising:
- (i) at least one rod comprising a plurality of consolidated thermoplastic impregnated rovings, the rovings comprising continuous carbon fibers oriented in the longitudinal direction and a thermoplastic matrix that embeds the carbon fibers, the carbon fibers having a ratio of ultimate tensile strength to mass per unit length of greater than about 1,000 MPa/g/m, wherein the thermoplastic matrix comprises a polyarylene sulfide, and wherein the rod comprises from about 30 wt. % to about 75 wt. % carbon fibers and from about 25 wt. % to about 70 wt. % thermoplastic matrix;
- and
- (ii) a capping layer surrounding the at least one rod, wherein the capping layer comprises a polyether ether ketone and is free of continuous carbon fibers;
- wherein the composite core has a flexural modulus of at least about 10 GPa;
- and
- (b) a plurality of conductive elements surrounding the cable core, wherein the conductive elements comprise aluminum or an aluminum alloy.
4 more elements
Dependencies are inferred from the claim text.