Abstract: A propulsion system for a large watercraft, e.g., for a high-speed, military surface craft, includes at least one water jet propulsion device (water jet) beneath the vessel. An operating method of such a system includes propulsive energy by combustion engines, e.g., gas turbines, and distributing the exhaust gases created by the combustion engines beneath the vessel in the water by the use of water flow of the water jet system. In such a method, the water flow speed of the water jet system is adjusted in accordance with the requirements of exhaust gas discharge and distribution.

Abstract: The invention relates to an electric energy supply system for a ship, in particular for a navy ship that can be operated with a low IR signature and that is configured as an <<all electric ship>> (AES). Said system comprises a direct current network (DC), supplied by fuel cells, as a ship electrical system and network for normal propulsion and an alternating current network (AC) comprising generators, in particular for generating energy for high-speed propulsion. According to the invention, the generators are motor-driven, e.g. by means of at least one gas turbine or one diesel motor, preferably supercharged and the AC and DC network are interconnected in such a way that electric energy can be exchanged between them, in particular that electric energy can be withdrawn from the DC network and transferred to the AC network to start the motor-driven propulsion.

Abstract: A fast military surface craft, particularly a frigate or a corvette, includes at least two electric rudder propeller drives, whereby the electric ruder propeller drive is placed at a cruising speed. The electric energy for the rudder propeller of the electric rudder propeller drives is generated by way of fuel cell units distributed in a de-centralized manner in the ship. At least two, preferably electric, hydrojets are provided with underwater hydrojet exit nozzles to enable the craft to travel at high speeds, whereby the electric energy of the hydrojets is produced, by generators.

Abstract: An electrical steering propeller for a seagoing high-speed ship having a polyphase electric motor which is mounted under the stern of the ship via a shaft which can rotate and preferably has two parts in a gondola-like housing, and can be supplied with electrical drive power via a slipring arrangement, and can be rotated via drive motors, wherein the steering propeller is mounted in the stern of the ship via a flat collar bearing (7) in the vicinity of the outer skin (6), in particular above the waterline, with the slipring arrangement (8) being accommodated in the upper part (3) of the shaft (2,3) at the level of the annular bearing (7), and with the drive motors for the rotary movement (9) being physically small and being arranged at least partially in the interior of the collar bearing (4).

Abstract: The invention relates to an energy system for watercraft, comprising at least one fuel cell module (6,7,8,9), preferably a H2O2 fuel cell module, by which at least one electric drive (17) and at least one electrical consumer are supplied with electric energy via a supply network. Said electrical drive (17) is an AC drive that is connected to a DC network (2) of the supply network via at least one power inverter (10).

Abstract: The invention relates to a fast military surface craft, particularly a frigate or a corvette, comprising at least two electric rudder propeller drives, whereby the electric ruder propeller drive are placed at a cruising speed. The electric energy for the rudder propellers of the electric rudder propeller drives is generated by means of fuel cell units distributed in a de-centralised manner in the ship. At least two, preferably electric, hydrojets are provided with underwater hydrojet exit nozzles to enable the craft to travel at high speeds, whereby the electric energy of said hydrojets is produced, preferably, by generators.

Abstract: An actuator is for a rudder propeller, in particular an electrically driven propeller of a sea-going vessel. The propeller is located on a rotative shaft in the stern region beneath the bottom of the vessel. The shaft can be rotated using at least two electric servomotors, which act by way of pinions on a rim gear that is connected to the upper part of the shaft. They preferably act by way of a gear that is located inside the upper part of the shaft and are configured to be controllable and adjustable in the group.

Abstract: A ship includes a ship's hull which is intended for accommodating cargo and/or people, and at least one rotatable steering propeller as a propulsion unit. The rotatable steering propeller is arranged in a connection unit in the form of a box in the stem of the ship's hull. Electrical and mechanical components for supplying power to and controlling the steering propeller and its electric motor are at least partially combined in functional modules which are in the form of a transport container. The container is designed such that it can be functionally tested, can be accepted at its point of manufacture, and can be installed in this form at any desired location in the ship based upon the container base structure.

Abstract: A propelling and driving system for boats having an outboard rudder propeller. The system provides the boat with reliable and comparatively good maneuverability. The system comprises at least two rudder propellers, each having driving motors configured in the form of a permanent magnet-excited synchronous machine. The stator winding of each synchronous machine has three winding phases connected to a three-phase alternating current, which are connected to the supply system of the boat. A modular controlling and regulating device comprising standardized modules is provided for each of the rudder propellers.

Abstract: An electric propulsion pod for a ship having a electric propulsion pod heat rejection member. The electric propulsion pod is attached below the ship by a hollow ship access shaft. The electric propulsion pod contains an electric motor for producing a water propulsion. The electric motor generates an amount of heat that is conducted and subsequently released into the water through the electric propulsion pod and ship access shaft surfaces. The heat rejection member is fitted for increasing the conduction and subsequent release of the electric motor heat.

Abstract: A DC voltage supply network is described for electric-motor loads, in particular on a ship. A plurality of electricity generation sets are connected in parallel on an output side, and a controllable rectifier or a DC voltage controller is connected downstream of an output of each electricity generation set and has a control input for connection of a voltage regulator. An output of the controllable rectifier or the DC voltage is coupled to an input of the voltage regulator in order to supply a voltage actual value signal and an additional signal, and is connected to the network in order to supply it. The loads are in each case connected to the network via an inverter which can be controlled via a control input by a regulator. In addition to an actual value and the nominal value, an input of the regulator is supplied with an additional signal which is derived from the inverter input voltage and/or the network voltage.