Abstract:
Method for supplying external energy to electrical on-board power networks of ships, with there being at least one generator (8), one converter (7, 12) and electrical loads in the ship's on-board power network, with the converter (7, 12) (shore connection converter) on board the ship (1), for transfer into the on-board power network, being fed by a connectable external current source (2) with current of a different frequency and voltage to that of the on-board network and said current being converted in the converter semiconductors into current with the voltage and the frequency of the on-board power network and fed to the on-board power network.
Abstract:
A ship which is driven by inboard engines with propellers (3) and by water jets (1) producing jets of water (7). The inboard engines (2) are embodied in the form of electric motors and the water jets (1) are used underneath the bottom of the ship. The electric inboard engines are accommodated in skegs (10) on the underside of the ship. A flow channel is formed between the skegs (10) for the jets of water (7) emitted by the water jets (1).
Abstract:
A ship drive system (10) according to the invention comprises at least one first and one second drive shaft (11, 12) for driving a respective propulsion unit (2), in particular of a water jet, wherein each of the electric drive shafts (11, 12) comprises at least one speed-variable generator (4) driven by an internal combustion engine (3, 6) for generating a motor voltage having a variable amplitude and variable frequency, and at least one speed-variable drive motor (5) that is supplied with said voltage and coupled to the propulsion unit (2). The first and second drive shafts (11, 12) can be switched from a first operating state, in which they are electrically disconnected from each other, to a second operating state, in which they are electrically coupled to each other such energy can be transmitted from the at least one generator (4) of the one drive shaft (11, 12) to the at least one drive motor (5) of the other drive shaft (11, 12). To this end, the at least one generator (4) preferably comprises a superconductor winding. A preferred use of the ship drive system (1) is found in trimarans.
Abstract:
In a ship (1) having a first propeller (5) and a second propeller (6), which are arranged one behind the other in the direction of travel (4) of the ship (3), an electric motor (15) for driving the first propeller (5) and a drive unit (8) for driving the second propeller (6), the drive unit (8) being arranged inside the ship (3) and being connected to the second propeller (6) via a propeller shaft (7) in order to drive said propeller (6), and having an opening (9) in the ship's hull (10), via which the propeller shaft (7) is led out of the ship (1), the fail safety can be increased by arranging the electric motor (15) outside the ship (3) between the opening (9) in the hull (10) of the ship (1) and the second propeller (6), and by providing said electric motor (15) with an opening (14) through which the propeller shaft (7) for driving the second propeller (6) runs.