Transformer core and method for stacking the core

Details Transformer core and method for stacking the core Transformer core and method for stacking the core

1990-11-16

1991-12-17

Kozma, Thomas J.

Inductor devices

Core joint structure

Overlapping laminations

29606, H01F 2726

Patent

active

050737660

ABSTRACT:
A transformer core and method of assembling the core which utilizes a plurality of two types of generally E-shaped laminations, type A and type B, each having two legs extending approximately the same distance and an outer third leg extending a distance substantially greater than the distance extended by the other two legs, thereby providing an extending outer leg portion on both laminations. The laminations are formed by stacking a number of core members, two of which are cut from a rectangular section of electrical steel. The type A core members and laminations are provided with a notch and an indentation extending from the bottom perimeter of the base. The type A and type B laminations are alternately positioned on stacking shims with the extending leg portion of all type A laminations at one side and the extending leg portion of all type B laminations on the opposite side. The notch and indentations cooperate with the shims to provide channels between the extending middle legs of the type B laminations because the dimensions of the base and middle leg of type A and type B laminations are otherwise the same. A separate transformer coil is placed over each of the three core legs. A plurality of I-shaped laminations are then positioned between the extending outer leg portions of the E-shaped laminations, are supported on the middle legs and extend to the opposite extending outer leg portions. I-shaped laminations which are positioned within the channels are inserted first thereby providing additional guidance for positioning the rest of the I-shaped laminations between those that are received in the channels.

REFERENCES:
patent: 1145551 (1915-07-01), Burke
patent: 2811203 (1957-10-01), Gabarino
patent: 3181402 (1965-05-01), Kuck et al.
patent: 4480377 (1984-11-01), House et al.
patent: 4594295 (1986-06-01), Waasner et al.
patent: 4827237 (1989-05-01), Blackburn

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