Patent ID: 7198528

Claim:
A propulsion unit arrangement for a ship, the arrangement comprising a motor unit located in water, said motor unit including an electric motor, a plurality of associated control devices, and a propeller arranged at an end of a motor shaft extending from an end of the motor unit, wherein cooling of the electric motor is effected over an entire circumferential surface area of the electric motor directly to the ambient water through a casing of the electric motor, wherein a lower end of an attachment assembly supports the motor unit, the attachment assembly being rotatable around a vertical axis and attached to the ship through an essentially horizontal bottom of the ship, wherein an upper end of the attachment assembly is attached to an arrangement means for turning the motor unit, for supplying power to the electric motor, and for controlling the motor unit arranged on the attachment assembly, wherein the attachment assembly is at least partially curved relative to the vertical axis, and wherein the motor unit is attached to the attachment assembly at an axial end of the motor unit opposite to the propeller at a point offset from the vertical axis.