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Slotless-armature DC drives for surface warship propulsion

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3 Author(s)
Spooner, E. ; Sci. Lab., Durham Univ., UK ; Haines, N. ; Bucknall, R.

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 direct-drive ship propulsion. The field system may use conventional wound poles, permanent magnets or superconducting coils for excitation. Slotless-armature designs using alternative types of field system are compared with a conventional slotted design for 10 MW, 150 rev/min rating. The slotless-armature superconducting-field 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

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:143 ,  Issue: 6 )

Date of Publication:

Nov 1996

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