Superconducting electrical machine rotor - has auxiliary cooling circuit for cooling transition elements and thermal screen of rotor

• Main Author: MICHEL BERTHET, ROGER GILLET, ANDRE MARQUET, FRANCOIS MOISSON-FRANCKHAUSER ET ROBERT RAVELET
• Format: Patent
• Language: English; French
• Published: 26.05.1978
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The rotor of the superconducting machine rotates around an axis (3). The rotor is contained in a rigid enclosure (8, 24, 14) fit with a shaft system (6) which supports the rotor. The enclosure being evacuated. In the enclosure is a cold part containing slots in which are lodged the superconducting windings. A principal cooling circuit (13, 76, 80, 10) cools the windings. A first (43) and a second (44) transition elements extend parallel to the axis (3) and are each fixed to a first and second part of the enclosure cold parts. A thermal screen surrounds the cold part inside the external enclosure (24) and extends parallel to the axis (3). Auxiliary cooling device is provided to cool the transition elements and the thermal screen. The auxiliary cooling device consists of a cooling circuit through which flows the cooling fluid from the cold part to a interior part of the first transition element. The fluid then passes to a first connection zone (48) then in opposite direction to the thermal screen. The fluid then flows to an exterior part of the second transition element, then to a second connection zone to the exterior end of the second transition element. L'invention concerne un rotor pour machine cryoélectrique. Un circuit auxiliaire d'hélium unique dérivé du circuit principal refroidit en série la partie intérieure froide d'un élément de transition thermique, l'écran thermique puis la partie extérieure chaude de l'autre élément de transition. L'invention s'applique aux alternateurs.