Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-08-28
2007-08-28
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S605000, C029S606000, C336S182000, C336S206000
Reexamination Certificate
active
10600676
ABSTRACT:
A preferred embodiment of a three-phase transformer includes a first, a second, and a third winding leg, and a first, a second, and a third winding positioned around the respective first, second, and third winding legs. The first, second, and third windings each includes an electrical conductor wound into a plurality of overlapping layers each formed by a plurality of adjacent turns of the electrical conductor, and an insulating material without end fill positioned between each of the overlapping layers. The electrical conductor has a transition portion formed therein between a first and a second of the overlapping layers. The transition portion is at least one of bent to form an offset in the electrical conductor, and secured to at least one of the plurality of adjacent turns.
REFERENCES:
patent: 2559824 (1951-07-01), Leland
patent: 3368176 (1968-02-01), Rechel
patent: 3504431 (1970-04-01), Schwenker et al.
patent: 4521954 (1985-06-01), Rademaker et al.
patent: 6216513 (2001-04-01), Nakamura et al.
patent: 2001/0005934 (2001-07-01), Nakamura et al.
patent: 3-70109 (1991-03-01), None
Stryken Egil
Wallumrod John
Younger Harold R.
ABB Technology AG
Katterle Paul R.
Tugbang A. Dexter
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