DOUBLY SALIENT PERMANENT MAGNET MACHINE WITH FIELD WEAKENING (OR BOOSTING) CAPABILITY.

摘要

A permanent magnet machine (10) combines both principles of variable reluctance machines and permanent magnets, and comprises a rotor (11) with salient rotor poles (12) and a stator (14) with salient stator poles (16 and 17). A pair of ferrite arched permanent magnets (21 and 22) are embedded in the stator yoke (15) beneath respective stator poles (16 and 17) and are arranged symmetrically around the central axis (13) of the machine (10). A field winding (F) for boosting or weakening the primary flux generated by the permanent magnets (21 and 22) is wound in a special arrangement.