Motor stator

Details Motor stator Motor stator

2006-04-04

2008-10-28

Harvey, James (Department: 2833)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S254100

Reexamination Certificate

active

07443071

ABSTRACT:
A motor stator includes a stator core (500) and a stator coil. The stator core includes a central cylinder (501) and a plurality of posts (503) extending from the central cylinder. Each post is connected with a magnetic pole (505). The post has a smaller height than the central cylinder and the magnetic pole whereby a recess (507) is formed above the post between the central cylinder and the magnetic pole. The stator coil is received in the recess and wound around the post. The stator core is integrally made from ferromagnetic powder by powder metallurgy technique. Each particle of the powder includes an inner core (12) made of magnetic material and an outer shell (14) surrounding the inner core. The shell has a higher electrical resistance than the inner core.

REFERENCES:
patent: 6081056 (2000-06-01), Takagi et al.
patent: 2006/0273670 (2006-12-01), Tung et al.
patent: 2006/0279157 (2006-12-01), Tung et al.
patent: 2006/0280944 (2006-12-01), Tung et al.
patent: 2007/0075598 (2007-04-01), Tung et al.
patent: 2008/0055764 (2008-03-01), Fujii et al.
patent: 2566523 (2003-08-01), None
patent: 1525622 (2004-09-01), None
patent: 245670 (2004-10-01), None

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