Rotary structure of permanent magnet electric machinery and...

Details Rotary structure of permanent magnet electric machinery and... Rotary structure of permanent magnet electric machinery and...

2007-08-28

2010-11-23

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156460

Reexamination Certificate

active

07839043

ABSTRACT:
A rotary structure of a permanent magnet electric machine including a stator and a rotor is provided. The stator has K salient teeth peripherally spaced with equal intervals for forming K winding slots, wherein K is a natural number greater than 1. The rotor has an annular inner surface and has P pairs of permanent magnets peripherally spaced with equal intervals along the inner surface for rotating around the stator, wherein P is a natural number. Each permanent magnet having two sides along a peripheral direction of the rotor includes a pair of inclined surfaces on the two sides, the pair of inclined surfaces is symmetric with respect to a radial plane of the each permanent magnet, and an inclined angle α between the inclined surface and the radial plane is selected from a range of 90(1−1/(4P))<α<90(1+1/(4P)).

REFERENCES:
patent: 5233250 (1993-08-01), De Filippis
patent: 6181035 (2001-01-01), Acquaviva
patent: 2005/0258698 (2005-11-01), Miyashita et al.

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