| 摘要 |
<p>The invention relates to a propeller drive system for a vessel or the like for operating two contra-rotating propellers (1, 2) disposed on two coaxial shafts (3, 4) in succession. The power supplies of two electric motors (5, 6) rotating the propellers (1, 2) comprise a first and second frequency converter (7, 8) and their control unit comprises means for controlling the frequency converters (7, 8) so that the direction of rotation of the motors (5, 6) and their rotational speed from zero up to the nominal speed can be chosen freely.</p> |
