Numéro : 2196 - Year : 1992
Electrical transmission for future fast vessels
J.-L. SABRIE, Chef du Service Marketing, GEC ALSTHOM Belfort, Division Electromécanique, Département Electrotechnique
H. GODFROID, Chef du Service Etudes Générales-Développements, CEGELEC Belfort, Division des Ensembles Industriels
P. ASSELIN, ALCATEL ALSTHOM International, Mission Marine
-A naval architect of future fast vessels can encounter certain difficulties in solving the problems which arise in his work, particularly :
Adaptating the torque and the power supplied by the prime movers engines to the torque and the power absorbed by the propulsion in the anticipated range of cruising speeds.
The installation of direct driving engines in the particular hulls is often difficult, even not possible, especially at locations demanded by the architect.
Electrical transmission offers suitable solutions to these two problems. However, it is generally considered to be quite heavy and more expensive. More detail will be given on the subject.
-Two examples will be presented here, one for use in 1992, the other at the beginning of 2000, if the necessary effort for development is undertaken soon.
1) SES ship with waterjets ; one 20 MW , 400 rpm drive per hull, made using gearboxes and 2 x 10 MW 7.900 rpm induction motors.
Thermal engines : 4 x 15 MW , 7.000 rpm gas turbines.
2) SWATCH ship with contrarotating propellers ; two 20 MW 200 rpm drives per hull, each one made with one 20 MW superconducting synchronous motor, directly driving the propeller and supplied by superconducting generators through static converters.
Thermal engines : 4 x 24 MW ,3.600 rmp gas turbines.
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