Electrical machine with cryogenic cooling - has superconducting winding connected to heat exchanger in rotor contg. vortex tube connected to thermal-em shield cooling duct

摘要

The rotor (3) has a superconducting winding (7) with cooling ducts (8) connected to a heat exchanger (26) in the cavity of the rotor. This rotor contains a Ranque vortex tube (16), a peripheral outlet of which is connected to a cooling duct in a thermal-electromagnetic shield (13). The rotor (3) also comprises two power leads (39) to the rotor, each having one cooling duct (40) connected to the central outlet (20) of the Ranque vortex tube. Reducer sections (9, 10) each have one cooling duct (11, 12) which has its first inlet close to the superconducting winding (7) and connected with the central outlet (20) of the Ranque vortex tube. The outlets of these cooling ducts (11, 12) are connected with the coolant discharge line (25).