Patent ID: 7741738
Filing Date: 2010-06-22
Classification: H02K,Y02E

Abstract:
1. A machine comprising: a superconducting rotor winding having coils; an uncooled rotor body mounted to rotate about a rotation axis, the rotor winding being arranged on the rotor body, the rotor body having outer regions respectively with uncooled flattened parts, the outer regions having a cross section that occupies a portion of an imaginary circle surrounding the rotation axis, with the flattened parts extending along chords of the imaginary circle; a cryostat occupying a portion of each outer region; and a tensile retention holding device provided for each outer region to hold the coil in tension within the cryostat, the holding device absorbing tensile forces acting on the rotor winding during operation of the machine, the entire structure of the holding device extending from one of the flattened parts of the rotor body to the rotor winding and communicating tensile forces to the rotor body through the uncooled flattened parts, the holding device including flexible tensile elements allowing tilting in the direction of the rotor axis to absorb thermal shrinkage of the winding relative to the rotor body.