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Recent developments in 2G HTS coil technology are presented highlighting the ability of 2G HTS wire to function under difficult operating conditions without degradation. The challenges of use in various coil constructions and applications are discussed. Several applications where the conductor is subjected to high stress levels include high field insert(More)
Development of superconducting fault current limiters (SFCLs) has been pursued for decades and has been limited thermally and/or mechanically by the available superconducting materials performance characteristics . However, within the past few years a newer, more robust type of superconductor known as 2G HTS wire, has become available in sufficient quantity(More)
YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> (YBCO) second-generation (2G) HTS conductors have been produced in lengths over 300 m in pilot scale facilities established at SuperPower. High throughput pilot-scale manufacturing has been demonstrated with tape speeds at or above 30 m/h of 12 mm wide tape (corresponding to 90 m/h of 4 mm wide conductor) in all(More)
High temperature superconducting transformers offer many economic, operational, and environmental benefits over conventional power transformers for utility applications. To establish the technical and economic feasibility and benefits of HTS transformers of medium-to-large (>10 MVA) ratings, a team that includes Waukesha Electric Systems (transformer(More)
For high temperature superconducting (HTS) power applications it is necessary to improve the understanding of the dielectric properties of materials in a cryogenic environment. It is necessary to know the breakdown strength of materials and systems as a function of gap in order to scale to higher voltages. The partial discharge (PD) onset voltage for(More)
We report here on the development of HTS coils at Intermagnetics for the Navy's homopolar motor/generator program. Two coil sizes were used. A series of small test coils (14.0 cm i.d./spl times/15.0 cm o.d./spl times/1.4 cm long) were employed to evaluate various conductor winding, insulation and epoxy impregnation issues. Based upon the results of these(More)
Within the past few years a newer, more robust type of superconductor known as 2nd Generation High Temperature Superconductor (HTS) wire, has become available in sufficient quantity and lengths for developers to build prototype devices and test their capabilities. This new material offers the potential for revolutionary changes in superconducting(More)
Within the past few years a newer, more robust type of superconductor known as Second-generation (2G) High Temperature Superconductor (HTS) wire, has become available in sufficient quantity and length for developers to build prototype devices and test their capabilities. This new material offers the potential for revolutionary changes in magnet technology,(More)
In this paper we describe the successful design, fabrication and test of a model high field insert magnet utilizing BSCCO-2223 tape conductors. This insert magnet is the first phase of a program to demonstrate the use of HTS conductors for the generation of the high magnetic fields required for NMR. The magnet, designed and fabricated at Intermagnetics,(More)
Liquid nitrogen (LN<sub>2</sub>) is used as a coolant and electrical insulation in many High Temperature Superconducting (HTS) applications. Hence a good understanding of the breakdown characteristics of this medium under a variety of practical electrode geometries and conditions is needed for design of high voltage equipment. While there is considerable(More)