Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-04-26
2011-04-26
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156330, C310S156370, C310S156510, C310S156530, C310S156590, C310S156650
Reexamination Certificate
active
07932658
ABSTRACT:
An electric machine includes a stator, and a rotor positioned adjacent the stator and configured to rotate with respect to the stator. The rotor includes a plurality of laminations having an outside diameter and stacked in a stackwise direction. Each lamination includes a plurality of non-linear slots positioned inward of the outside diameter. Each non-linear slot includes an inner portion spaced a first distance from the outside diameter and two end portions disposed a second distance from the outside diameter. The second distance is smaller than the first distance. The rotor also includes a plurality of permanent magnets. Each magnet is disposed in one of the non-linear slots.
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Derwent Translation (Abstract) CN1949628A.
Machine Translation JP10309051 (1998), JP2005245148 (2005), JP2006014450 (2006), JP09163647 (1997).
Machine TranslationJP09163647 (1997).
Finite Element Analysis of Brushless DC Motors for Flux Weakening Operation, Dan M. Ionel et al., Research Institute for Electrical Machines, University of Bath, Sep. 5, 1996.
Finite Element Analysis of an Interior-Magnet Brushless D.C. Machine, with a Step=Skewed Rotor, Eastham et al., University of Bath, Mar. 2, 1997.
Design Considerations for Permanent Magnet Synchronous Motors for Flux Weakening Applications, Ionel et al., May 1, 1998.
Pending U.S. Appl. No. 12/114,460, filed May 2, 2008.
A.O. Smith Corporation
Gonzalez Quinones Jose A
Leung Quyen
Michael & Best & Friedrich LLP
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