Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-01-24
2006-01-24
Tamai, Karl (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S181000, C310S191000
Reexamination Certificate
active
06989619
ABSTRACT:
A radial gap brushless electric machine (30) having a stator (31) and a rotor (32) and a main air gap (34) also has at least one stationary excitation coil (35a,36a) separated from the rotor (32) by a secondary air gap (35e,35f, 36e, 36f) so as to induce a secondary flux in the rotor (32) which controls a resultant flux in the main air gap (34). Permanent magnetic (PM) material (38) is disposed in spaces between the rotor pole portions (39) to inhibit the second flux from leaking from the pole portions (39) prior to reaching the main air gap (34). By selecting the direction of current in the stationary excitation coil (35a, 36a) both flux enhancement and flux weakening are provided for the main air gap (34). Improvements of a laminated rotor, an end pole structure, and an arrangement of the PM elements for providing an arrangement of the flux paths from the auxiliary field coil assemblies are also disclosed.
REFERENCES:
patent: 3411027 (1968-11-01), Rosenberg
patent: 5091668 (1992-02-01), Cuenot et al.
patent: 5397975 (1995-03-01), Syverson
patent: 5886445 (1999-03-01), Hsu
patent: 5929579 (1999-07-01), Hsu
patent: 6057622 (2000-05-01), Hsu
patent: 6097124 (2000-08-01), Rao et al.
patent: 6573634 (2003-06-01), Hsu
patent: 6703741 (2004-03-01), Ifrim
patent: 2002/0117907 (2002-08-01), Gay et al.
patent: 2002/0180297 (2002-12-01), Ifrim
patent: 2004/0232794 (2004-11-01), Hsu
patent: 2005/0001505 (2005-01-01), Hsu
patent: 803 962 (1997-10-01), None
patent: 2000-278899 (2000-10-01), None
Quarles & Brady LLP
Tamai Karl
UT-Battelle LLC
LandOfFree
Rotor apparatus for high strength undiffused brushless... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotor apparatus for high strength undiffused brushless..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotor apparatus for high strength undiffused brushless... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3559800