COMPACT PERMANENT-MAGNET MACHINES

ABSTRACT The availability of new high-field permanent-magnet materials has created opportunities for novel topologies of electrical machines with advantageous characteristics such as high efficiency and good power/weight ratio. A disc-type arrangement, with slotless winding and axially-directed flux in the air gap, has particularly short axial length and is well suited for system integration as either generator or motor. Applications include auxiliary power units, electric vehicle drives and wind power generation.

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