A slotless armature with multiplex connection can operate with higher coil voltage and current than a conventional armature before the commutation limits are reached and so can achieve higher power ratings. DC motors may thus be designed for powers of tens of MW, suitable for the direct-drive ship propulsion. The field system may use conventional wound poles, permanent magnets or superconducting coils for exitation. Slotless-armature designs using alternative types of field systems are compared with a conventional slotted design for 10 MW, 150 rev/min rating. The slotless-armature superconducting-fields design offers the lightest and most compact overall arrangement and the best full-load efficiency. However, permanent-magnet excitation offers a much simpler solution, is the cheapest to build and gives better part-load efficiency. A more detailed design for a 15 MW, 200 rev/min permanent-magnet ship propulsion machine is presented.


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    Title :

    Slotless-armature DC drives for surface warship propulsion


    Additional title:

    Gleichstrom-Wellenmotor für ein Überwasser-Kriegsschiff, mit nutenlosem Anker und Dauermagneterregung oder supraleitenden Erregerspulen


    Contributors:
    Spooner, E. (author) / Haines, N. (author) / Bucknall, R. (author)

    Published in:

    Publication date :

    1996


    Size :

    6 Seiten, 6 Bilder, 4 Tabellen, 6 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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