Core laminations for shell-type cores, especially for transformers
AssigneeWilfried Ernst Sawatzky
InventorsKarl Philberth, Bernhard Philberth
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Abstract
The invention concerns EI-type core laminations, especially for transformers. The E-piece has a center leg of width f, two outer legs of width b, a yoke of width c.sub.1 and two windows of width h and length e. The I-piece has the width c.sub.2. The laminations have the following ratios: e is greater than 3 f/2 and less than 3.5 f/2; c.sub.1 and b are both at least 1.1 f/2; c.sub.1 -c.sub.2 is at least 0.1 f/2; c.sub.1 +c.sub.2 is at least 2.1 f/2 and at most 2.5 f/2. A preferred embodiment of the invention has the ratios: e=3.25 f/2; c.sub.1 =b=1.25 f/2; c.sub.2 =h=f/2.
Claims21
Core laminations for shell-type cores, especially for transformers comprising a plurality of core laminations arranged in layers, each of said core laminations comprising an E-part and an I-part, two said I-parts being formed from the stamped out window parts of two E-parts stamped out with their legs turned toward one another, each of said core laminations having a center leg, two outer legs parallel thereto at a certain distance, and two yokes connecting the ends of said legs, one yoke which will be called the jointlessly connected yoke, being connected without joints to said legs, the other yoke, which will be called the parted yoke, having joints provided between itself and the center leg and between itself and the outer legs,
- wherein the length (e) of each window (10 or 11) is greater than 3 times and less than 3.5 times half the width (f/2) of the center leg (1) (3f/2<e<3.5f/2) and wherein the width (c.sub.1) of the jointlessly connected yoke (5) and the width (b) of each of the two outer legs (2 or 3) are each at least 1.1 times and at most 1.5 times half the width (f/2) of the center leg (1) (1.1f/2.ltoreq.c.sub.1 .ltoreq.1.5f/2 and 1.1f/2.ltoreq.b.ltoreq.1.5f/2) and
- wherein the difference between the width (c.sub.1) of the jointlessly connected yoke (5) and the width (c.sub.2) of the parted yoke (4) is at least 0.1 times half the width (f/2) of the center leg (1) (c.sub.1 -c.sub.2 .gtoreq.0.1f/2) and the width (c.sub.2) of the parted yoke is substantially equal to half the width (f/2) of the center leg (c.sub.2 .apprxeq.f/2) and
- wherein the sum of the width (c.sub.1) of the jointlessly connected yoke (5) and the width (c.sub.2) of the parted yoke (4) is at least 2.1 times and at most 2.5 times half the width (f/2) of the center leg (1) (2.1f/2.ltoreq.c.sub.1 +c.sub.2 .ltoreq.2.5f/2) and the length (e) of each window (10 or 11) is equal to half the length (a.sub.1 /2) of the parted yoke (4) (e=a.sub.1 /2) and equal to the sum of half the width (f/2) of the center leg (1), the width (h) of each window (10 or 11) and the width (b) of each of the two outer legs (2 or 3) (e=f/2+h+b) and the width (c.sub.2) of the parted yoke (4) is equal to the width (h) of each window (10 or 11) (c.sub.2 =h).
Core laminations for shell-type cores, especially for transformers comprising a plurality of core laminations arranged in alternatingly reversed layers, each of said core laminations comprising an E-part and an I-part, two said I-parts being formed from the stamped out window parts of two E-parts stamped out with their legs turned toward one another, each of said core laminations having a center leg, two outer legs parallel thereto at a distance, and two yokes connecting the ends of said legs, said yokes being provided with inner edges facing the windows providing the winding spaces, and one yoke which will be called the jointlessly connected yoke, being connected without joints to said legs, the other yoke, which will be called the parted yoke, having abutting joints provided between itself and the center leg and between itself and the outer legs,
- wherein the length (e) of each window (10 or 11) is greater than 3 times and less than 3.5 times half the width (f/2) of the center leg (1) (3f/2<e<3.5f/2) and
- wherein the width (c.sub.1) of the jointlessly connected yoke (5) and the width (b) of each of the outer legs (2 or 3) are each at least 1.1 times half the width (f/2) of the center leg (1) (c.sub.1 .gtoreq.1.1f/2 and b.gtoreq.1.1f/2), and
- wherein the difference between the width (c.sub.1) of the jointlessly connected yoke (5) and the width (c.sub.2) of the parted yoke (4) is at least 0.1 times half the width (f/2) of the center leg (1) (c.sub.1 -c.sub.2 .gtoreq.0.1f/2) and
- wherein the sum of the width (c.sub.1) of the jointlessly connected yoke (5) and the width (c.sub.2) of the parted yoke (4) is at least 2.1 times and at most 2.5 times half the width (f/2) of the center leg (1) (2.1f/2.ltoreq.c.sub.1 -c.sub.2 .ltoreq.2.5f/2) and
- wherein in said plurality of said core laminations arranged in alternatingly reversed layers, the inner edges of said jointlessly connected yoke forming the boundary of said winding spaces and the inner edges of said parted yoke being spaced at a distance outwardly from the boundary of said winding spaces and said jointlessly connected yoke overlapping said abutting joints and said abutting joints being displaced into the interior of the core yoke which is that portion of the assembled parted yokes and jointlessly connected yokes beyond the winding space.
Dependencies are inferred from the claim text.