Patent ID: 7018249

Claim:
A marine propulsion system, comprising: at least one vessel propeller; at least one electric motor by which the at least one vessel propeller is drivable; a converter-fed electrical power supply, adapted to supply electric power to the at least one electric motor, including, at least one drive machine, and at least one generator, adapted to be driven by the at least one drive machine, wherein at least one of the at least one electric motor and the at least one generator are in the form of three-phase synchronous machines, at least one of the at least one electric motor and the at least one generator includes a rotating field winding composed of high-temperature superconductor (HTSL) wire, each rotating field winding is arranged in a cryostat which is vacuum-insulated and by which the rotating field winding is cryogenically coolable to a temperature between 15 and 77 K, at least one of the at least one electric motor and the at least one generator includes an air gap three-phase winding composed of loomed copper conductors, arranged in an annular gap between a rotor and a laminated magnetic iron yoke, and the rotor, including the rotating field winding composed of HTSL wire, includes 6 to 12 poles.