| 摘要 |
The invention relates to power trains for auxiliary marine vessels such as tug boats. Prior power trains for such vessels lacked flexibility of operation, control, location, and were not as efficient as they could have been. In order to solve this problem power control units are used to control direct current drive motors which are used to power the propellers. Diesel motors (10) are used to drive alternating current generators. The output from these generators is supplied to direct current motors (20) which drive the propellers (24) of the vessel. The direct current motors (20) are controlled by silicone control rectifiers (17) and variable current controls (18). An additional benefit of the use of such a power train is that the diesel motors (10) may be located in the forward part of the vessel and the direct current motors (20) may be located in the aft part of the vessel for trim purposes and to shorten the propeller shaft. Benefits of this power train when used on auxiliary vessels are economy of fuel and space. |
