Patent ID: 7528510
Filing Date: 2009-05-05
Classification: F25B,F28D,H02K,Y02E

Abstract:
1. A machine assembly, comprising a rotor supported for rotation about a rotation axis and having at least one superconducting winding which is coupled for heat transfer to a central cavity extending in the direction of the rotation axis; a stationary cooling unit located outside the rotor and having a condenser space which is connected to the cavity by a single tube assembly to thereby define a closed single tube system for circulation of a coolant by way of a thermosiphon effect, with a liquid phase of the coolant condensing in the condenser space reaching the cavity through the single tube assembly, and a gaseous phase of the coolant evaporating in the cavity being returned from the cavity to the condenser space via the single tube assembly; and pressure generating means for generating pressure pulses on a part of the gaseous phase of the coolant to produce short-term pumping pulses on the liquid phase of the coolant flowing from the condenser space in a direction toward the cavity.