The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2006
Filed:
Feb. 28, 2002
Antonino Fratta, Turin, IT;
Antonino Fratta, Turin, IT;
C.R.F. Societa' Consortile per Azioni, Orbassano, IT;
Tree di Fratta Antonino S.a.s., Via Levanna, IT;
Abstract
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 () and n slots () 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 () having the same extent along the direction of relative displacement between armature and field, and having a respective magnetic potential value (τ). Each sample () 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 (. ) each of which couples at least two samples of the field in such a way as to ensure a substantial magnetic equipotentiality.