Electrical machine with cryogenic cooling

An electrical machine with cryogenic cooling, comprising:

• a sealed housing;
• a stator winding secured in said sealed housing;
• a hollow rotor arranged inside said sealed housing;
• a shaft of said hollow rotor;
• a superconducting exciting winding secured in said hollow rotor on said shaft of said hollow rotor;
• busbars connected to said superconducting exciting winding;
• an axial channel for the supply of liquid coolant to said superconducting exciting winding, provided at one end of said shaft and extending along the axis of said shaft;
• an additional axial channel for the removal of gaseous coolant, provided at the opposite end of said shaft and extending along the axis of said shaft;
• other channels for the removal of gaseous coolant, provided at both ends of said shaft and in communication with the inner cavity of said rotor, and adapted to be connected to gas collectors;
• at least two chambers provided on said shaft of said rotor and extending over the entire length of said superconducting exciting winding, parallel with and extending along the axis of said shaft, and communicating with said axial channel for the supply of liquid coolant and with said additional axial channel for the removal of gaseous coolant;
• radial channels provided within said exciting winding, and said radial channels arranged to provide communication between said chambers and said cavity of the rotor;
• and
• longitudinal channels adapted to remove the gaseous coolant, provided at the outer peripheral surface of said superconducting exciting winding along the entire length thereof, whereby said coolant is continuously separated in the course of its movement toward said sealed housing of said rotor and the temperature of said superconducting exciting winding is substantially more stablized.