Jerry L Tolbert

US Patent:

8326386, Dec 4, 2012

Filed:

Apr 21, 2006

Appl. No.:

11/912083

Inventors:

Dag Willén - Klagshamn, SE
Chresten Traeholt - Frederiksberg, DK
Manfred Däumling - Altshausen, DE
Jerry C. Tolbert - Carrollton GA, US
Mark Roden - Newnan GA, US
David Lindsay - Carrollton GA, US

Assignee:

NKT Cables Ultera A/S - Asnaes

International Classification:

H01L 39/24

US Classification:

505230

Abstract:

The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system. The problem is solved in that said cable—at least over a part of its length—is located eccentrically relative to said central longitudinal axis when viewed in a cross section perpendicular to said longitudinal axis and where the eccentric location has the function of accommodating thermal shrinkage and expansion of the cable with respect to the thermal insulation.

US Patent:

8594756, Nov 26, 2013

Filed:

May 9, 2013

Appl. No.:

13/890407

Inventors:

- Asnaes, DK
Jerry C. Tolbert - Carrollton GA, US
Carsten Thidemann Nielsen - Jaegerspris, DK
Chresten Traeholt - Frederiksberg, DK

Assignee:

NKT Cables Ultera A/S - Asnaes

International Classification:

H01L 23/48

US Classification:

505190

Abstract:

The invention relates to a superconducting element joint comprising a joint between two superconducting elements comprising at least one direct SC-SC transition joint. By the invention an improved superconducting element joint may be obtained. The invention also relates to a process for providing such superconducting element joint and a superconducting cable system comprising such superconducting element joint.

US Patent:

8623787, Jan 7, 2014

Filed:

Nov 1, 2012

Appl. No.:

13/666293

Inventors:

- Asnaes, DK
Chresten Traeholt - Frederiksberg, DK
Manfred Daumling - Alshausen, DE
Jerry C. Tolbert - Carrollton GA, US
Mark Roden - Newnan GA, US
David Lindsay - Carrollton GA, US

Assignee:

NKT Cables Ultera A/S - Asnaes

International Classification:

H01L 39/24

US Classification:

505431

Abstract:

The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system. The problem is solved in that said cable—at least over a part of its length—is located eccentrically relative to said central longitudinal axis when viewed in a cross section perpendicular to said longitudinal axis and where the eccentric location has the function of accommodating thermal shrinkage and expansion of the cable with respect to the thermal insulation.

US Patent:

20030183410, Oct 2, 2003

Filed:

Jun 9, 2003

Appl. No.:

10/363008

Inventors:

Uday Sinha - Carrollton GA, US
Raburn Hughey - Franklin GA, US
Jerry Tolbert - Newnan GA, US
Michael Gouge - Oak Ridge TN, US

International Classification:

H01B001/00
H02G001/00

US Classification:

174/068100

Abstract:

On order to provide a flexible oxide superconducting cable which is reduced in AC loss, tape-shaped superconducting wires covered with a stabilizing metal are wound on a flexible former. The superconducting wires are preferably laid on the former at a bending strain of not more than 0.2%. In laying on the former, a number of type-shaped superconducting wires are laid on a core member in a side-by-side manner, to form a first layer. A prescribed number of tape-shaped superconducting wires are laid on top of the first layer in a side-by-side manner, to form a second layer. The former may be made of a metal, plastic, reinforced plastic, polymer, or a composite and provides flexibility to the superconducting wires and the cable formed therewith.

US Patent:

20040211586, Oct 28, 2004

Filed:

Apr 12, 2004

Appl. No.:

10/492385

Inventors:

Uday Sinha - Carrollton GA, US
Jerry Tolbert - Newnan GA, US

International Classification:

H01B012/00

US Classification:

174/125100

Abstract:

Disclosed is a termination that connects high temperature superconducting (HTS) cable immersed in pressurized liquid nitrogen to high voltage and neutral (shield) external bushings at ambient temperature and pressure. The termination consists of a splice between the HTS power (inner) and shield (outer) conductors and concentric copper pipes which are the conductors in the termination. There is also a transition from the dielectric tape insulator used in the HTS cable to the insulators used between and around the copper pipe conductors in the termination. At the warm end of the termination the copper pipes are connected via copper braided straps to the conventional warm external bushings which have low thermal stresses. This termination allows for a natural temperature gradient in the copper pipe conductors inside the termination which enables the controlled flashing of the pressurized liquid coolant (nitrogen) to the gaseous state. Thus the entire termination is near the coolant supply pressure and the high voltage and shield cold bushings, a highly stressed component used in most HTS cables, are eliminated. A sliding seal allows for cable contraction as it is cooled from room temperature to 72-82 K. Seals, static vacuum, and multi-layer superinsulation minimize radial heat leak to the environment.