Abstract:
The invention relates to a high temperature superconducting transformer (1) which has at least one core limb (3) on which a primary winding (9) and a secondary winding (8) are coaxially arranged while forming a leakage gap (10, 11). The aim of the invention is to provide a leakage inductance which is as high as possible while simultaneously reducing the space needed, and to provide a high degree of efficiency while using as little conductor material as possible for the superconductive windings (8, 9). To this end, a leakage flux body (12, 13) having a relative permeability of mu r > 1 is provided in the leakage gap (10, 11). Said leakage body has a plurality of cylindrical leakage flux elements (12' or 13') which are arranged in layers while forming gaps (18).
Abstract:
The invention relates to a high temperature superconducting transformer (1) which has at least one core limb (3) on which a primary winding (9) and a secondary winding (8) are coaxially arranged while forming a leakage gap (10, 11). The aim of the invention is to provide a leakage inductance which is as high as possible while simultaneously reducing the space needed, and to provide a high degree of efficiency while using as little conductor material as possible for the superconductive windings (8, 9). To this end, a leakage flux body (12, 13) having a relative permeability of mu r > 1 is provided in the leakage gap (10, 11). Said leakage body has a plurality of cylindrical leakage flux elements (12' or 13') which are arranged in layers while forming gaps (18).
Abstract:
A high voltage induction device including a power cable (12) comprising inner conducting means (13-15) and outer electrical insulation (20-22) having spaced apart inner and outer layers (20, 21) of semiconducting material and, positioned between the inner and outer layers, and intermediate layer (22) of electrically insulating material. The conducting means comprises conductor means (14) and cooling means (13) for cooling the conductor means (14) to improve the electrical conductivity of the conductor means. The inner layer (20) of semiconducting material is electrically connected to the conductor means and the outer layer (21) of semiconducting material is at a controlled electric potential along its length.
Abstract:
An earthing transformer (1) having a core (3) and, wound on the core (3), windings (9a-11a, 9b-11b) each comprising electrical conducting means (41) and surrounding electrically insulating means (42). The electrically insulating means (42) comprises magnetically permeable solid material within which the electric field is confined in use of the transformer.
Abstract:
A method and apparatus for powering a high power load (44) (on the order of 50,000 watts or more) can have an input from any of a plurality of different voltage sources, AC or DC. In one embodiment, the AC sources can have a frequency in the range of 16 2/3-60 Hertz, and voltages in the range of 480-38,000 volts. The method and apparatus feature cryocooling inverter electronics (34), which converts an input signal to a high frequency high voltage signal, to, for example, less than about 180K. A high frequency transformer (38) receives the high frequency high voltage signal and transforms it into a desired voltage level which can then be filtered and/or demodulated and applied to the load (44). The transformer (38) is preferably comprised of a superconducting material, and then, the inverter (34) and transformer (38), at least, are actively cooled as required.
Abstract:
A polymer composition for impregnating a high temperature superconductor (HTS) coil, the composition comprising: a polymer resin, a plurality of particles of a first filler material, and a plurality of particles of a second filler material; wherein the median particle size of the second filler material is less than the median particle size of the first filler material. The polymer composition may be used to prepare a polymer impregnated HTS coil having a predetermined turn-to-turn spacing. A property of the polymer composition may also be modified, for example, the coefficient of thermal contraction and/or resistivity of the composition. Also disclosed is a polymer impregnated HTS coil and a method for preparing the coil.
Abstract:
Die vorliegende Erfindung stellt einen supraleitenden strombegrenzenden Transformator, einen Wickelkörper (10) dafür sowie ein Verfahren zur Herstellung eines solchen Wickelkörpers (10) bereit. Der erfindungsgemäße Wickelkörper (10) für eine supraleitende Sekundärwicklung für den supraleitenden strombegrenzenden Transformator hat eine hohlzylindrische Grundform. Erfindungsgemäß weist der Wickelkörper (10) um seinen Umfang verteilt in Längsrichtung eine Vielzahl an Vertiefungen (12) und Mantelteilstücke (11) auf. Dabei ist ein supraleitender Leiter (4a, 15) der Sekundärwicklung in einem Normalzustand so um den Wickelkörper (10) wickelbar, dass der Leiter an den Mantelteilstücken (11) anlegbar und zwischen Leiter und den Vertiefungen (12) ein Spalt bildbar ist.
Abstract:
Es wird ein Transformator mit wenigstens einer ersten Transformationseinheit mit einer Primärwicklung und einer Sekundärwicklung angegeben. Beide Wicklungen weisen jeweils mindestens einen hochtemperatursupraleitenden Leiter auf. Beide Wicklungen sind jeweils in mehreren Windungen um eine für beide Wicklungen gemeinsame erste ringartige Grundstruktur gewickelt, derart, dass sich beide Wicklungen über einen gemeinsam bewickelten, überwiegenden Teil des Umfangs der ringartigen Grundstruktur erstrecken.
Abstract:
A fault current limiter designed for connection into a medium voltage, high voltage, or extra-high voltage substation or other high voltage source such as a generator station, the limiter including: a ferromagnetic circuit formed from a ferromagnetic material and including at least a first limb, a second limb and a third limb; a first input phase coil wound around the first limb, a second output phase coil wound around the third limb; a saturation mechanism surrounding a limb for magnetically saturating the ferromagnetic material; a containment vessel providing a substantially uniform, low electrical conductivity medium surrounding the ferromagnetic circuit, the phase coils and the saturation mechanism.