Patent ID: 6730893
Filing Date: 2004-05-04
Classification: H05B

Abstract:
Apparatus for induction heating of billet-shaped blanks (10) of electrically well conductive and non-magnetic metal, in particular aluminium or copper, comprising a winding (1,21) adapted to surround the blank (10) completely or partially, to be supplied with electric alternating current (8) from a power supply, and to be cooled by means of a cooling system (5,22) at least during the heating of the blank (10), characterized in that the winding (1,21) has turns comprising superconducting material (40) and is surrounded by a thermally insulating chamber (3,33), that the cooling system (5,22) is adapted to maintain the winding at a temperature in the range of 30-90Â° K, and that the frequency of the alternating current (8) is adapted to be in a range of common mains frequencies.