A slotless-armature DC motor with multiplex winding can be designed for higher power rating than one with a conventional slotted armature. Conventional field systems would be very heavy and a superconducting field winding is considered in order to create an iron-free stator and lightweight machine. The superconducting field winding is relieved of reaction torque by means of a special winding attached to a separate torque tube. The reaction winding is also designed to establish the necessary commutation flux in the interpole region. Test results from a small laboratory machine demonstrate the principle of the proposed torque reaction winding. A design for a 20 MW ship propulsion motor is presented.
Large superconducting DC drives with separate torque reaction windings
Große Gleichstrommotoren mit supraleitenden Wicklungen und getrennten Wicklungen für die Drehmomentrückkopplung
IEEE Transactions on Industry Applications ; 31 , 6 ; 1297-1305
1995
9 Seiten, 7 Bilder, 9 Tabellen, 5 Quellen
Article (Journal)
English
Electric Machine With Stator Windings For Reduced Torque Ripple
European Patent Office | 2018
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