Inductor devices – Core joint structure – Overlapping laminations
Patent
1980-12-03
1984-04-24
Kozma, Thomas J.
Inductor devices
Core joint structure
Overlapping laminations
29609, H01F 2724, H01F 4102
Patent
active
044451040
ABSTRACT:
A magnetic core including a plurality of layers of laminations formed from a magnetic strip material wherein at least two side leg and two yoke laminations are assembled around a core window to form four outer corners. Each of the side leg and yoke laminations have had one end thereof sheared diagonally with respect to the longitudinal dimension of the strip material. The other half of this one end is sheared substantially perpendicular to the strip material's longitudinal dimension. In each layer, the ends of the side leg and yoke laminations form two joints that are half straight and half diagonal. The ends of the side leg and yoke laminations in each layer form a step pattern about the outer corners of the core with the joints between the side leg and yoke laminations in one layer overlapping the joints between the side leg and yoke laminations in the next adjacent layer. A series of lap joints is thus formed in step relation.
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"Progress of Core Technology in Transformer Manufacturing", K. C. Lin and B. B. Ellis, Insulation/Circuits, Dec. 1977.
Burkhardt Charles E.
Lin Kou C.
Electric Power Research Institute Inc.
Kozma Thomas J.
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