Small-sized motor having ring-shaped field magnet

Details Small-sized motor having ring-shaped field magnet Small-sized motor having ring-shaped field magnet

2007-08-03

2010-06-08

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S0400MM, C310S269000, C310S154010, C310S054000, C310S052000

Reexamination Certificate

active

07732963

ABSTRACT:
A small-sized motor includes a field magnet attached to an inner circumferential surface of a metallic motor casing and having four or more magnetic poles. The field magnet is formed of a single ring-shaped magnet member having a predetermined thickness with respect to the radial direction and a predetermined length with respect to the thrust direction. At each of portions between the magnetic poles formed through magnetization, the magnet member has a thin portion having a reduced thickness with respect to the radial direction, the thin portion being formed by cutting the magnet member from the radially outward side. The magnetization is performed in the radial direction so as to alternately form S poles and N poles in the circumferential direction. At each of portions between the magnetic poles, the magnet member may have cut portions formed at opposite end portions of the magnet member with respect to the thrust direction.

REFERENCES:
patent: 2278489 (1942-04-01), Rawlings
patent: 2894156 (1959-07-01), Kent
patent: 3278776 (1966-10-01), Dochterman
patent: 3500090 (1970-03-01), Baermann
patent: 5095238 (1992-03-01), Suzuki et al.
patent: 5162684 (1992-11-01), Hayakawa
patent: 5206556 (1993-04-01), Hayakawa
patent: 5682072 (1997-10-01), Takahashi
patent: 5723929 (1998-03-01), Niimi
patent: 5949169 (1999-09-01), Niimi
patent: 6181035 (2001-01-01), Acquaviva
patent: 6891296 (2005-05-01), Huang et al.
patent: 6987340 (2006-01-01), Kaneshige
patent: 2002/0047422 (2002-04-01), Tomiyama et al.
patent: 2005/0110364 (2005-05-01), Yanagisawa
patent: 2005/0174003 (2005-08-01), Naito et al.
patent: 52-44313 (1977-03-01), None
patent: 60-59752 (1985-04-01), None
patent: 60-62842 (1985-05-01), None
patent: 62-138047 (1987-06-01), None
patent: H10-201206 (1998-07-01), None
Kuhlmann.pdf : Design of Electrical Apparatus, Kuhlmann, 1959.

Affiliated with

Also associated with

Rating

Small-sized motor having ring-shaped field magnet does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Small-sized motor having ring-shaped field magnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small-sized motor having ring-shaped field magnet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4244185