Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2008-03-18
2008-03-18
Mullins, Burton (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S256000, C310S231000, C310S269000, C029S596000, C029S598000
Reexamination Certificate
active
07345396
ABSTRACT:
Metallic laminations for magnetic circuits. Some of the illustrative embodiments may be a magnetic circuit comprising a low reluctance magnetic flux path comprising a plurality of stacked metallic laminations (each lamination having an edge), and an air gap in operational relationship to at least a portion of the edges of the stacked metallic laminations (wherein magnetic flux flows at least partially through the stacked metallic laminations and the air gap). Adjacent edges of the stacked metallic laminations are intentionally offset by an amount greater than manufacturing tolerance of edge position for the stacked metallic laminations to improve eddy current loss occurring from lamination-to-lamination contact at the edges.
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Cervenka Greg P.
Martino Forrest M.
Conley & Rose, P.C.
Mullins Burton
National-Oilwell L.P.
Preston Erik
Scott Mark E.
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