| 摘要 |
<p>An electric machine (M) comprises a field (A) and an armature (B) between which is defined an air gap (G). The field (A) has at least one pair of poles (N, S) and the armature (B) has n teeth ( 20 ) and n slots ( 21 ) per pair of poles (N, S) of the field (A). The surface of the field (A) facing the air gap (G) is divided into 2n elements or samples ( 1-12 ) having the same extent along the direction of relative displacement between armature and field, and having a respective magnetic potential value (tau<SUB>i</SUB>). Each sample ( 1-12 ) of the field (A) has a respective total permeance value (pi) at the air gap (G) in a predetermined relative position between armature (B) and field (A). The field (A) comprises a plurality of magnetically distinct ferromagnetic bodies ( 30, 31, 32, . . . ) each of which couples at least two samples of the field in such a way as to ensure a substantial magnetic equipotentiality.</p> |
