Patent ID: 7960887

Claim:
Apparatus, comprising: at least one permanent-magnet switched-flux (PMSF) device having: an outer rotor mounted to a shaft about a central axis extending axially through the PMSF device; a first plurality of permanent-magnets mounted in a first permanent magnet circle radially outwardly in a first transverse plane extending transversely from a first section of the central axis adjacent to an inner surface of the outer rotor; a second plurality of permanent-magnets mounted in a second permanent magnet circle radially outwardly in a second transverse plane extending transversely from a second section of the central axis adjacent to the inner surface of the outer rotor; and an inner stator coupled to the shaft and comprising: a stator core having a core axis co-axial with the central axis; a first plurality of stator poles mounted in a first stator pole circle radially outwardly from the stator core axis in the first transverse plane; and a second plurality of stator poles mounted in a second stator pole circle radially outwardly from the stator core axis in the second transverse plane, said first plurality of permanent-magnets and said second plurality of permanent-magnets each comprising permanent magnets of alternating polarity from one permanent-magnet to an adjacent permanent-magnet in the corresponding plurality of permanent-magnets.