Siemens Aktiengesellschaft

Adolf Kühn

Michael Frank

Peter Van Hasselt

Peter Massek

Peter Kummeth

Peter Van Haβelt

A rectangular coil has several successive windings which are made of a strip-shaped super conductor, which contains at least one core which is embedded in a normal conductive matrix material and which is made of a high-T-super conductor material. The coil is made of a strip-shaped superconductor and does not have additional insulation.

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The machine device comprises a motor () with a rotor () rotating about an axis (A), the superconducting winding of which is coupled with thermal conduction to a central refrigerant cavity (). The cavity () forms a single-tube system, together with the line sections () laterally connected thereto and a condenser chamber () of a refrigeration unit, located outside the motor (), in which a refrigerant (k, k') circulates as result of a thermal siphon effect. According to the invention, the refrigerant supply to the central cavity () is maintained, even with inclined positions (d) for the rotor (), whereby pressurization means are provided, which generate pressure pulses of gaseous refrigerant, acting on the liquid refrigerant (k) in the condenser chamber () or the connected line sections ().

Superconducting machine device with a superconducting winding and thermosiphon cooling

An electric machine has a rotor that is rotatable about an axis of rotation, and an especially superconducting winding which is to be cooled to a low temperature. The winding is enveloped by a securing means with a wrap. The outer contour of the wrap of the securing means increases from a smaller outside diameter to a greater outside diameter in the axial direction. The wrap is surrounded in a force-fitting manner by several securing rings which are arranged one behind another and have an inside diameter which conforms to the respective outside diameter of the outer contour.

Electric machine with a wrapped winding cooled to a low temperature

An aspect of the invention relates to a machine comprising a rotor mounted so it can rotate about a rotational axis, and a superconductive winding located in a winding support. Further, connection devices are provided to retain the winding support inside a rotor external housing. To compensate changes caused by the expansion of the winding support, a connection device should have at least one connection element that extends axially with one end of the element connected to the winding support in a fixed manner, and the opposite free end connected to a centering retaining element of the rotor eternal housing in a non-positive radial fit, so it can be displaced axially.

Winding support of a superconductive rotor, comprising a structure to compensate for axial expansion of the support

The machine comprises a rotor with a winding for cooling, which is in particular superconducting, in a winding support. A device with a composite body made of fiber-reinforced plastic is provided, for retention of the winding support within a rotor outer housing, on a torque transmitting side. The composite body is in one piece and comprises lateral pieces and a center piece, whereby the lateral pieces extend outwards in a funnel shape and the center piece is in the form of a hollow cylinder. The lateral pieces should at least partly comprises a corrugated form in the circumferential direction and are connected with a positive or friction fit by press-ring bodies with flange-like fixing pieces made from metal.

Machine with a coolable winding arranged in a winding support and with a torque transmitting device

A superconducting device has a rotor rotatable about an axis of rotation and a superconducting winding in a heat conducting winding carrier. The winding carrier has a central cooling agent cavity with a lateral cavity leading out of the winding carrier connected thereto. A cold head associated with a cooling unit is connected to a condenser unit which condenses the cooling agent. A fixed heat tube guiding the cooling agent is coupled to the condenser unit, protruding axially into the co-rotating lateral cavity and is sealed in relation thereto.

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Röthenbach, Germany

Adolf Kühn