| 摘要 |
Arrangement for supplying propulsion power to a contra rotating propellers (CRP) propulsion system in a marine vessel, which arrangement comprises a first propeller (6) driven by a rotating power unit (2) and a second propeller(12) driven by an AC motor (8). The second propeller is rotated in the opposite direction as the first propeller, wherein an AC generator (4) is driven by the rotating power unit (2) and the AC generator (4) is electrically connected to the AC motor (8). The rotation speed of the second propeller is between 95% and 150% of the rotation speed of the first propeller, that the AC motor and the AC generator have the same electrical frequency, and that the pole number of the AC generator is from 2 to 40 and the pole number of the AC motor is from 2 to 40. |
