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| Number | Title | Issue Date |
| 7902461 | Fault current limiting HTS cable and method of configuring same A cryogenically-cooled HTS cable is configured to be included within a utility power grid having a maximum fault current that would occur in the absence of the cryogenically-cooled HTS cable. The cryogenically-cooled HTS cable includes a continuous liquid cryogen co... | 03/08/2011 |
| 7724482 | Parallel HTS transformer device A superconducting transformer system is configured to be included within a utility power grid having a known fault current level. The superconducting transformer system includes a non-superconducting transformer interconnected between a first node and a second node ... | 05/25/2010 |
| 7674751 | Fabrication of sealed high temperature superconductor wires A method of making a laminated superconductor wire includes providing an assembly, where the assembly includes a substrate; a superconductor layer overlaying a surface of the substrate, the superconductor layer having a defined pattern; and a cap layer; and slitting... | 03/09/2010 |
| 7622424 | Thick superconductor films with improved performance A method for producing a thick film includes disposing a precursor solution onto a substrate to form a precursor film. The precursor solution contains precursor components to a rare-earth/alkaline-earth-metal/transition-metal oxide including a salt of a rare earth e... | 11/24/2009 |
| 7619345 | Stator coil assembly A stator coil assembly includes a cylindrical support tube with first and second pluralities of stator coils disposed radially around the support tube. Each stator coil includes first, second, third, and fourth linear segments, each having first and second planar br... | 11/17/2009 |
| 7582328 | Dropwise deposition of a patterned oxide superconductor An oxide superconductor article having an oxide superconductor layer of a predetermined pattern is prepared by continuously advancing a wire having a textured surface into a deposition zone, dispensing droplets of a precursor solution to an oxide superconductor from... | 09/01/2009 |
| 7567160 | Supplementary transformer cooling in a reactive power compensation system A reactive power compensation system includes a reactive power compensation device and a transformer electrically connected to the reactive power compensation device and having a cooling unit. The reactive power compensation device has an enclosure housing power ele... | 07/28/2009 |
| 7326434 | Precursor solutions and methods of using same Superconductor precursor solutions are disclosed. The precursor solutions contain, for example, a salt of a rare earth metal, a salt of an alkaline earth metal and a salt of a transition metal. The precursor solutions can optionally include a Lewis base. The precurs... | 02/05/2008 |
| 7304826 | Fault management of high temperture superconductor cable A method and system for providing protection for a superconducting electrical cable located in a utility power network includes detecting a fault current on the superconducting electric cable, determining the cumulative total energy dissipated in the superconducting... | 12/04/2007 |
| 7282832 | Axially-expandable EM shield A superconducting rotating machine includes a stator assembly having at least one stator coil assembly. A rotor assembly, which includes an axial shaft, is configured to rotate within the stator assembly. The rotor assembly includes at least one superconducting wind... | 10/16/2007 |
| 7265521 | Reactive power compensation to minimize step voltage changes and transients The invention features a system and approach for minimizing the step voltage change as seen by the utility customer as well minimizing transients imposed on the fundamental waveform of a normal voltage carried on a utility power network when a reactive power source ... | 09/04/2007 |
| 7261776 | Deposition of buffer layers on textured metal surfaces A method of making a multilayer article includes depositing a first material on the surface of a metal substrate to form a seed layer of the first material, the first material being deposited under reducing conditions relative to the metal substrate, and then epitax... | 08/28/2007 |
| 7211919 | Thermally-conductive stator support structure A stator assembly includes a plurality of stator coil assemblies and a stator coil support structure constructed of a non-magnetic, thermally-conductive material. The stator coil support structure includes an axial passage for receiving a rotor assembly and a plural... | 05/01/2007 |
| 7119644 | Mounting structure for superconducting windings A superconducting coil assembly is of the type mounted to a rotor assembly of an electric rotating machine and, in operation, is maintained at cryogenic temperatures while the portion of the rotor assembly is maintained above cryogenic temperatures. The superconduct... | 10/10/2006 |
| 7106156 | Superconductor cables and magnetic devices Superconducting cables and magnetic devices are disclosed. ... | 09/12/2006 |
| 7091703 | Dynamic reactive compensation system and method The invention features a system for connection to a utility power network. The system includes a reactive power compensation device coupled to the network and configured to transfer reactive power between the utility power network and the reactive power compensation... | 08/15/2006 |
| 7018954 | Processing of magnesium-boride superconductors Processes for the fabrication of MgB2 powder and wires are provided. Powders are produced by mechanically alloying magnesium- and boron-containing precursors under controlled conditions to avoid secondary phase and impurity formation. Powders are also pre... | 03/28/2006 |
| 6987331 | Voltage recovery device for use with a utility power network A voltage recovery device is configured to provide reactive power to a utility power network at a level and for a duration sufficient to recover the voltage on the utility power network within a predetermined proportion of the nominal voltage, following a fault cond... | 01/17/2006 |
| 6977827 | Power system having a phase locked loop with a notch filter A power system having a phase locked loop (PLL) with a notch filter for synchronous reference frame sequence separation. The notch filter includes a generalized integrator tuned to the notch frequency. The output of the generalized integrator is summed with the filt... | 12/20/2005 |
| 6974501 | Multi-layer articles and methods of making same The invention relates to multi-layer articles and methods of making such articles. The methods include first conditioning the surface of an underlying layer, such as a buffer layer or a superconductor layer, then disposing a layer of material on the conditioned surf... | 12/13/2005 |
| 6960554 | Method of making a BSCCO superconductor article A method of making an oxide superconductor article includes converting an oxide superconducting precursor into an oxide superconductor by thermo-mechanical processing using intermediate rolling deformation and heat treatment (including liquid-phase sintering and low... | 11/01/2005 |
| 6911759 | Stator coil assembly for superconducting rotating machines A stator for use in a rotating machine includes a first conductor; and a second conductor wound, in-hand, over the first conductor and along a longitudinal axis of the stator. The second conductor is electrically isolated from the first conductor along the length of... | 06/28/2005 |
| 6906434 | Electric utility system with superconducting magnetic energy storage a voltage recovery device is configured to provide real and reactive power to a utility power network at a sufficient level and for a sufficient duration to recover the voltage on the utility power network within a predetermined proportion of the nominal voltage, fo... | 06/14/2005 |
| 6906265 | Cabled conductors containing anisotropic superconducting compounds A cabled conductor comprises a plurality of transposed strands each comprising one or more preferably twisted filaments preferably surrounded or supported by a matrix material and comprising textured anisotropic superconducting compounds which have crystallographic ... | 06/14/2005 |
| 6900619 | Reactive power compensation to minimize step voltage changes and transients The invention features a system and approach for minimizing the step voltage change as seen by the utility customer as well minimizing transients imposed on the fundamental waveform of a normal voltage carried on a utility power network when a reactive power source ... | 05/31/2005 |
| 6893732 | Multi-layer articles and methods of making same The invention relates to superconductor articles, and compositions and methods for making superconductor articles. The methods can include using a precursor solution having a relatively small concentration of total free acid. The articles can include more than one l... | 05/17/2005 |
| 6888286 | Stator coil assembly for superconducting rotating machines A stator support system for supporting a stator coil assembly includes an inner support tube having an outer surface; spaced windings supported on the inner support tube with spaces between adjacent windings defining gaps; support members, each disposed within one o... | 05/03/2005 |
| 6879081 | Stator coil assembly for superconducting rotating machines A stator support system for supporting a stator coil assembly includes a inner support tube having an outer surface; spaced windings supported on the inner support tube with spaces between adjacent windings defining gaps; support members, each disposed within one of... | 04/12/2005 |
| 6873079 | Tangential torque support A superconducting rotor assembly includes an axial shaft and a winding support structure. A torque tube is connected to this winding support structure. An interconnection assembly mechanically couples the torque tube to the axial shaft. This interconnection assembly... | 03/29/2005 |
| 6863752 | Method of producing a superconducting tape A method and article for producing a high transition temperature superconducting tape or wire with a normal metal sheath and at least two surface layers, an inner electrically insulating layer and an outer low friction layer. The method includes mechanical deformati... | 03/08/2005 |
| 6841988 | Method for the determination of the critical current for a conductor including superconducting material, and an apparatus for performing the method A method and apparatus for determining a critical current of a conductor at least including superconducting material conveys the conductor in a superconducting state through a varying external magnetic field. A part of at least a first contact-free measurement of a ... | 01/11/2005 |
| 6828919 | Exciter assembly telemetry An exciter assembly supplies current to a superconducting load. The exciter assembly includes a transformer for generating the current and an optical emitter and an optical receiver. The transformer includes a stationary winding portion having a stationary winding a... | 12/07/2004 |
| 6828507 | Enhanced high temperature coated superconductors joined at a cap layer This invention relates to a practical superconducting conductor based upon biaxially textured high temperature superconducting coatings. In particular, methods for producing flexible and bend strain-resistant articles and articles produced in accordance therewith ar... | 12/07/2004 |
| 6815856 | Tangential torque support A superconducting rotor assembly includes an axial shaft and a winding support structure. A torque tube is connected to this winding support structure. An interconnection assembly mechanically couples the torque tube to the axial shaft. This interconnection assembly... | 11/09/2004 |
| 6812601 | Superconductor rotor cooling system A system for cooling a superconductor device includes a cryocooler located in a stationary reference frame and a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with a rotating reference f... | 11/02/2004 |
| 6797313 | Superconductor methods and reactors Superconductor reactors, methods and systems are disclosed. ... | 09/28/2004 |
| 6791216 | Exciter for superconducting rotating machinery An exciter assembly for supplying power to a superconducting load, such as a superconducting field coil, disposed within a cryogenic region of a rotating machine. The exciter assembly provides an efficient and reliable approach for transferring the electrical power ... | 09/14/2004 |
| 6787939 | Electronic module interconnect system An interconnection system for providing signals to a number of independently controllable or selectable electronic modules includes first connection terminals associated with each and every one of the electronic modules and second connection terminals associated wit... | 09/07/2004 |
| 6784362 | Polymer encapsulated ceramic superconductors The invention features a superconducting ceramic conductor for use in a preselected fluid cryogen. The conductor includes a composite ceramic superconducting wire having an outer surface along its length and a sealing structure hermetically surrounding the outer sur... | 08/31/2004 |
| 6765151 | Enhanced high temperature coated superconductors This invention relates to a practical superconducting conductor based upon biaxially textured high temperature superconducting coatings. In particular, methods for producing flexible and bend strain-resistant articles and articles produced in accordance therewith ar... | 07/20/2004 |
