Abstract: A contactless synchronous electric machine comprises a stator carrying an armature winding, a field winding and a rotor with claw-shaped pole systems coaxially surrounding the stator with the armature winding. The armature winding and the field winding are made from a superconducting material and secured within a cryostat with liquid helium blowing round said windings. The cryostat is axially disposed within the rotor and is attached to a housing. The assembly including the rotor, cryostat and stator is vertically arranged in the housing and the rotor shaft extends through an opening in the bottom of the housing.

Abstract: A cryogen-cooled synchronous compensator, comprising a fixed armature winding and a rotor with a field winding arranged thereon, said windings being made of superconducting materials and located, together with the rotor, within a fixed cryostat, characterized in that the rotor carrying the field winding is enclosed within the cryostat in the airtight housing, adapted to prevent cryogen fluid from contacting the rotary members of the machine.