Two-sided splice for high temperature superconductor laminated wires

A two-sided joint for an HTS laminated wire comprising:

• a first laminated HTS wire having a tapered first end across the width of the first laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer;
• and a second laminate layer overlaying the HTS film layer;
• a second laminated HTS wire having a tapered first end across the width of the second laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer, and a second laminate layer overlaying the HTS film layer, and wherein the tapered first end of the first laminated HTS wire is adjacent to and mated with the angled tapered end of the second laminated HTS wire;
• an upper support in electrical communication with the second laminate layer of the first laminated HTS wire and the second laminate layer of the second laminated HTS wire;
• and
• a lower support proximate to the first laminate layer of the first laminated HTS wire and the first laminate layer of the second laminated HTS wire,
• wherein at least one of a length and an amount of laminate in at least one of the supports is selected to provide a neutral axis for the HTS films in the first laminated HTS wire and the second laminated HTS wire.

A two-sided joint for a HTS laminated wire comprising:

• a first laminated HTS wire having a tapered first end and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer;
• and a second laminate layer overlaying the HTS film layer;
• a second laminated HTS wire having a tapered first end and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer, and a second laminate layer overlaying the HTS film layer, and wherein the tapered first end of the first laminated HTS wire is adjacent to and mated with the tapered end of the second laminated HTS wire;
• a first HTS strap in electrical communication with the second laminate layer of the first laminated HTS wire and the second laminate layer of the second laminated HTS wire;
• and
• a backing strap proximate to the first laminate layer of the first laminated HTS wire and the first laminate layer of the second laminated HTS wire,
• wherein the materials and dimensions of the joint are selected to avoid at least one of kinking, delamination, and degradation of the HTS wires.

A superconducting cable comprising:

• a former;
• and
• a plurality of HTS wires, wherein at least one wire has one or more two-sided joints and one or more gaps between the each of the two-sided joint and the former,
• wherein the one or more two-sided joint comprises:
• a first laminated HTS wire having a tapered first end across the width of the first laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer;
• and a second
• laminate layer overlaying the HTS film layer;
• a second laminated HTS wire having a tapered first end across the width of the second laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer, and a second laminate layer overlaying the HTS film layer, and wherein the tapered first end of the first laminated HTS wire is adjacent to and mated with the angled tapered end of the second laminated HTS wire;
• an upper support in electrical communication with second laminate layer of the first laminated HTS wire and the second laminate layer of the second laminated HTS wire;
• and
• a lower support proximate to the first laminate layer of the first laminated HTS wire and the first laminate layer of the second laminated HTS wire.

A method of winding a superconducting wire comprising:

• splicing one or more HTS wires to form one or more two-sided joints;
• wrapping the one or more HTS wires around a former in a spiral pattern;
• and
• creating a gap between the two side joint and the former,
• wherein the one or more two-sided joint comprises:
• a first laminated HTS wire having a tapered first end across the width of the first laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer;
• and a second laminate layer overlaying the HTS film layer;
• a second laminated HTS wire having a tapered first end across the width of the second laminated HTS wire and comprising a first laminate layer, a substrate layer overlaying the first laminate layer, a HTS film layer overlaying the substrate layer, and a second laminate layer overlaying the HTS film layer, and wherein the tapered first end of the first laminated HTS wire is adjacent to and mated with the angled tapered end of the second laminated HTS wire;
• an upper support in electrical communication with second laminate layer of the first laminated HTS wire and the second laminate layer of the second laminated HTS wire;
• and
• a lower support proximate to the first laminate layer of the first laminated HTS wire and the first laminate layer of the second laminated HTS wire.