Ship, in particular freight ship, with a magnus rotor

A method of operating a cargo ship, comprising a plurality of Magnus rotors, the method comprising:

• independently controlling at least one of a rotary speed and a direction of rotation of a plurality of electric motors each associated with a respective Magnus rotor;
• identifying a desired propulsion;
• and
• operating in at least one of a first operating mode, a second operating Mode, and a third operating mode;
• in the first operating mode actuating the Magnus rotors in such a way that a maximum propulsion is obtained, wherein the difference between the desired propulsion and the propulsion obtained by the rotation of the Magnus rotors is obtained by an electric motor;
• in the second operating mode shutting down the Magnus rotors and actuating the electric motor in such a way that the desired propulsion is obtained by the electric motor;
• and
• in the third operating mode actuates the Magnus rotors in such a way that a propulsion is obtained by the Magnus rotors that is less than a maximum propulsion of the Magnus rotors, wherein the a difference of the desired propulsion and the propulsion obtained by the rotation of the Magnus rotors is obtained by the electric motor,
• wherein the cargo ship has a propeller that is driven by the electric motor.

A cargo ship, comprising:

• a plurality of Magnus rotors;
• individually actuable electric motors each associated with one of the plurality of Magnus rotors and configured to rotate the associated Magnus rotor;
• converters associated with one of the electric motors to control a rotary speed and direction of rotation of the electric motor;
• a main electric motor as a main drive of the ship, wherein a converter is associated with the main electric motor for controlling the main electric motor;
• a propeller that is driven by the main electric motor;
• and
• a central control unit connected to the converters for controlling the converters thereby controlling the rotary speed and direction of rotation of each of the Magnus rotors independently of the other Magnus rotors and for controlling the main electric motor, the control unit configured to receive a desired course and a desired arrival time, the control unit being configured to calculate a desired propulsion based on the desired course and the desired arrival time, wherein the control unit is configured to operate in first and second operating modes,
• wherein in the first operating mode, the control unit actuates the Magnus rotors to operate at a maximum state, wherein a difference between the desired propulsion and a propulsion obtained by the rotation of the Magnus rotors is obtained by the main electric motor,
• wherein in the second operating mode, the control unit shuts down the Magnus rotors and the desired propulsion is obtained by the main electric motor, and
• wherein in the third operating mode, the control unit actuates the Magnus rotors to operate at a less than maximum state, wherein a difference of the desired propulsion and the propulsion obtained by the rotation of the Magnus rotors is obtained by the main electric motor.