Metal working – Method of mechanical manufacture – Electrical device making
Patent
1998-05-04
2000-11-07
Hughes, S. Thomas
Metal working
Method of mechanical manufacture
Electrical device making
310 42, H02K 1502
Patent
active
061418560
ABSTRACT:
A rotor includes a shaft; a permanent magnet layer; and a retainer comprising a conductive, low magnetic permeability material bound to the rotor shaft. The permanent magnet layer is semi-restricted between the shaft and the retainer. In one embodiment, the magnet layer includes a molded ring magnet. In another embodiment, the magnet layer includes a plurality of magnet segments which can be situated on the rotor in rotor pockets or in a rotor cage. The bond between the retainer and the rotor can be enabled by a cap or by support elements. A high conductivity material can be situated over the retainer with the combination of the retainer and the high conductivity material having a resistivity high enough to minimize space harmonic losses and low enough to minimize time harmonic losses. The high conductivity material can also be applied to induction rotors for excluding high frequency components while permitting penetration of low frequency torque producing fields.
REFERENCES:
patent: 3593049 (1971-07-01), Nurnberg et al.
patent: 3727302 (1973-04-01), Phelon
patent: 3789250 (1974-01-01), Macoit et al.
patent: 4012651 (1977-03-01), Burson
patent: 4146809 (1979-03-01), Rielly
patent: 4227105 (1980-10-01), Kumakura
patent: 4433261 (1984-02-01), Nashiki et al.
patent: 4636107 (1987-01-01), Casler et al.
patent: 4729160 (1988-03-01), Brown
patent: 4843271 (1989-06-01), Shah
patent: 4916344 (1990-04-01), Hammer et al.
patent: 4953284 (1990-09-01), Hammer et al.
patent: 5038065 (1991-08-01), Matsubayashi et al.
patent: 5091668 (1992-02-01), Cuenot et al.
patent: 5485045 (1996-01-01), Canders et al.
patent: 5528095 (1996-06-01), Strobl
Johnson Roger Neal
Kliman Gerald Burt
Liao Yuefeng
Soong Wen Liang
Agosti Ann M.
Breedlove Jill M.
General Electric Company
Hong John C.
Hughes S. Thomas
LandOfFree
Method of fabricating rotors with retaining cylinders and reduce does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of fabricating rotors with retaining cylinders and reduce, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of fabricating rotors with retaining cylinders and reduce will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1629299