Siemens Aktiengesellschaft

Rolls-Royce Deutschland Ltd & Co. Kg

Siemens Energy Global Gmbh & Co. Kg

Wolfgang Nick

Michael Frank

Peter Van Hasselt

Jörn Grundmann

Heinz Schmidt

Marijn Pieter Oomen

Peter Massek

Peter Kummeth

Mercedes Herranz Gracia

Tabea Arndt

Anne Bauer

Werner Herkert

Joachim Frauenhofer

Michael Tenzer

Markus Boss

Adolf K&uuml;hn

Denis Imamovic

Reinhard Schlosser

Denis Steyn

The present disclosure relates to DC transmission. Some embodiments may include a device for DC transmission comprising: a superconducting transmission line including a superconducting conductor element; and a cooling device for cooling an inner region of the transmission line with a fluid coolant to a temperature below a critical temperature of the superconducting conductor element. The superconducting transmission line may comprise a vacuum-insulated sleeve thermally isolating the inner region of the transmission line from a warmer outer surrounding area. The cooling device may comprise a feed device feeding coolant at an end region of the transmission line into the inner region of the transmission line. The transmission line may be free of internally arranged feed devices for feeding coolant at locations away from the end region.

Device for DC current transmission and cooling method

Various embodiments include a stator for an AC electric machine with a number of magnetic poles comprising: a central axis; and a stator winding with a plurality of conductor turns. The individual conductor turns are grouped into a total of n electrical strands. The individual conductor turns of a respective electrical strand define a first conductor branch and a second conductor branch. The first conductor branch and the second conductor branch are arranged helically around the central axis over at least half of their respective lengths. The helically arranged conductor branches each have a pitch greater than a product of an axial length of the helical conductor branches and the number of magnetic poles.

Helical winding with more uniform field utilization

A superconducting coil device includes at least one coil winding, including at least one first and one second superconducting strip conductor, the first and second strip conductors each having a superconducting layer and a contact side provided with a contact layer; at least one first contact electrically connecting the contact side of the first strip conductor to an external circuit via a first contact piece; at least one second contact electrically connecting the contact side of the second strip conductor to the external circuit via a second contact piece; and a third contact electrically connecting the first and second strip conductors via the contact layer of the first and the second strip conductor within the coil winding, wherein the contact side of the first strip conductor has a different orientation relative to a center of the coil winding than the contact side of second strip conductor.

Superconduting coil device comprising coil winding and contacts

A super conductor is disclosed, in particular a high temperature super conductor of a synchronous machine, including a cooling circuit for a coolant. The liquefied coolant in the cold head provided with a condenser is guided to the super conductor which is to be cooled, in particular in the rotor of the synchronous machine and is returned to the condenser in a gaseous form. In order to guide the coolant from the condenser to the super conductor, pressure generated by a component of the coolant evaporated by a heat source is used.

Cooling device for a super conductor and super conducting synchronous machine

A high-temperature superconductor (HTS) coil includes a coil winding with a superconducting material and a coil former for carrying the coil winding. When the high-temperature supercon-ductor (HTS) coil cools down from a room temperature to an operating temperature, the coil winding or the coil former counteract a thermal shrinkage of the coil winding in order to avoid or reduce a longitudinal compression of the superconducting material of the coil winding.

High-temperature superconductor (HTS) coil

The machine contains a rotor with a hot rotor housing in which a cold part with a superconductive rotor winding is located. A part which acts as a baffle screen is provided on the outside of the rotor housing, facing a stator. Supporting elements are intended to be provided at predetermined points between the hot housing and the cold part, extending in the radial direction to such an extent that, during normal operation of the machine, a short separation is in each case formed between the supporting elements and the hot housing or the cold part, and such that a force fit is produced between the hot housing and the cold part via the supporting elements only in the event of a defect which leads to deformation of the hot housing of the machine.

Machine based on superconducting technology with part support elements

The superconducting winding comprises a rotor which may rotate about a rotation axis with a superconducting winding in a thermally conducting winding support. The winding support comprises a central coolant cavity, with a lateral cavity leading out of the winding support connected thereto. A cold head of a refrigeration unit is connected to a condenser unit for condensing refrigerant and is arranged outside the rotor. A fixed heat tube, supplying the refrigerant, is coupled to the condenser unit, extending axially into the rotating lateral cavity and is sealed relative to the cavity. The refrigerant is a mixture of several components having different condensation temperatures.

Superconducting device with a cold head of a refrigeration unit with a thermosyphon effect thermally coupled to a rotating superconducting winding

The invention relates to a superconductive device containing a rotor that can be rotated about an axis of rotation and that comprises a superconductive winding in a winding support. Said winding support has a central cavity, into which two fixed thermal tubes project axially. One of said tubes forms a cooling finger that is closed at the end and contains a second coolant with a higher condensation temperature. The other tube supplies a first cooling with a lower condensation temperature to the central cavity and evacuates said coolant from the cavity. To condense the coolants, the tubes lead to a refrigeration unit, situated outside the rotor and equipped with a refrigeration head and a condenser device.

Superconductive device comprising a refrigeration unit, equipped with a refrigeration head that is thermally coupled to a rotating superconductive winding

In order to cool the windings, core and optionally the wall of the element () receiving the windings () and the core () as effectively as possible, conducting surfaces () are disposed inside said element in such a way that the flow of coolant initially passes along the windings (), followed by the limbs () of the core surrounded by the windings, and subsequently the other areas (). Said arrangement of conducting surfaces is particularly suitable for use with transformers having superconductive windings made of HTSL conductor material.

Transformer with forced liquid coolant

The engine has a rotor rotationally mounted about a rotational axis and is provided with a superconductive winding arranged in a winding support. In order to fix the winding support inside an external rotor housing, a rigid connecting device having a hollow cylindrical connecting element made of fiber reinforced plastic is provided on the torque transmitting side. The connecting element is configured as a single piece and consist of end parts located on the front face and a central part located between the latter, wherein the end parts are corrugated in peripheral direction and are non-corrugated in the central part. The end parts of the connecting element are connected to and engine with one another in a non-positive fit manner in groovelike recesses of flangelike end pieces made of metal.

Engine with a superconductive winding arranged in a winding support and means for transmitting torque from the winding support to a shaft part

A superconducting toroidal magnet system includes magnet segments subdivided into two groups, wherein each group has its own supply device, in order to prevent a total failure from local overheating in the event of a quench. The supply devices are constructed with low impedance. This promotes a so-called current swing between the groups.

Superconducting toroidal magnet system

A coil configuration includes at least one superconducting coil having an associated coil surface and a conductor containing superconducting filaments and being wound substantially on the coil surface. The conductor has a longitudinal axis and has a respective transversal axis oriented approximately perpendicular to the coil surface at each point along the longitudinal axis. The conductor has a cross section being extended along the transversal axis at each of the points along the longitudinal axis. The conductor has two ends protruding from the at least one coil. At least one of the ends has a twist in the vicinity of the at least one coil. The transversal axis is approximately parallel to the coil surface downstream of the twist.

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Nürnberg, Germany

Wolfgang Nick