Method of making a transformer core comprising groups of amorpho

Details Method of making a transformer core comprising groups of amorpho Method of making a transformer core comprising groups of amorpho

1994-04-21

1995-03-21

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

336213, 336234, H01F 4102

Patent

active

053984030

ABSTRACT:
This is a method for making a transformer core comprising superposed groups of amorphous steel strip wrapped about the core window, each group comprising an inner section and an outer section disposed in superposed relationship, and each section comprising many thin layers of amorphous steel strip. Each of the layers in a section has a length dimension measured between the transversely-extending edges of the layer located at opposite ends of the section. The layers in the inner section of a group have substantially equal lengths, and the layers in the outer section of said group have substantially equal lengths of a greater value than the lengths of the layers in the inner section. When the groups are wrapped about the core window, the following relationships are present. At one end of each group the transversely-extending edges of all the layers in said group are substantially aligned to form a smooth edge. At the other end of the group (i) the transversely-extending edges of the layers in the inner section are disposed to form a beveled edge for the inner section, (ii) the transversely-extending edges of the layers in the outer section are disposed to form a beveled edge for the outer section, and (iii) the beveled edge of the outer section overlaps the beveled edge of the inner section.

REFERENCES:
patent: 3469221 (1969-09-01), Olsen
patent: 4761630 (1988-08-01), Grimes et al.
patent: 5063654 (1991-11-01), Klappert et al.

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