Patent ID: 6994602

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; and a converter-fed power supply, adapted to supply the at least one electric motor with electric power, and including at least one drive machine and at least one generator, adapted to be driven by the at least one drive machine, wherein the at least one electric motor and the at least one generator are three-phase synchronous machines, wherein at least one of the at least one electric motor and the at least one generator includes a rotor and a stator winding arranged following one another in the radial direction of at least one of the at least one electric motor and the at least one generator, wherein the stator winding includes an air gap three-phase winding whose bundled conductors are formed from insulated thin copper wires arranged in an annular gap between the rotor and an iron yoke, wherein the air gap three phase winding is at least one of reinforced by a plastic structure and at least one of encapsulated and impregnated with resin, and is connected to a cooling apparatus by which heat losses produced are adapted to be dissipated, wherein the air gap three-phase winding includes no slots in the iron yoke and the iron yoke is in the form of a laminated magnetic iron yoke, and wherein the air gap three-phase winding of at least one of the at least one electric motor and at least one generator for the power supply is installed in an annular container including insulating material surrounded by the laminated magnetic iron yoke, and wherein the cooling apparatus includes a coolant circuit adapted to introduce coolant into the annular container on one end face of the annular container holding the air gap three-phase winding, and adapted to carry the coolant away from the annular container on its other end face with the coolant flowing between the first end face and the second end face of the annular container between the air gap three-phase winding and the annular container.