Electric machine with cryogenic cooling - has shaft with slots for coolant supplied from one end and evacuated through other

摘要

The rotor of the electric machine has an excitation winding mounted on the shaft in a chamber filled with a coolant fed through an axial channel in the shaft at its one end, and evacuated through channels at both ends of the shaft. The rotor shaft has slots parallel to its axis, at places supporting the superconducting winding and connected to the coolant supply channel. The coolant discharge channel at the shaft other end is also connected to the slots.