Patent ID: 7002273

Claim:
Magnetic bearing of a rotor shaft, relative to a stator comprising: (a) the rotor shaft having an arrangement of permanent-magnet elements arranged side by side in the region of the stator; (b) the stator has a structure with high-T c superconductor material with grains; (c) the high-T c superconductor material is located in or on the surface of a heat sink that is arranged coaxially with the rotor shaft; (d) the heat sink has either one of a cooling channel which is also arranged coaxially with the rotor shaft, or is formed as a solid piece and is in contact with a cold head; (e) the heat sink is located inside an evacuated housing with lateral wall regions, an outer wall region, which faces away from the rotor shaft, the lateral wall regions and the outer wall region consisting of stainless steel, and an inner wall region of nonmetallic material; and (f) the wall regions being joined with one another vacuum-tight.