Synchronous electric machine

Details Synchronous electric machine Synchronous electric machine

2006-05-02

2006-05-02

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156570

Reexamination Certificate

active

07038345

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 (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 (τi). 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.

REFERENCES:
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patent: 4924130 (1990-05-01), Fratta
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patent: 6008559 (1999-12-01), Asano et al.
patent: 6177745 (2001-01-01), Narita et al.
patent: 0 872 944 (1998-10-01), None
patent: 2000 197 292 (2000-07-01), None

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