Lamination construction for transformer core and core including same

Claim 2

A lamination construction for a split magnetic transformer core comprising, in combination, a pair of outer legs, a split inner leg made up of first and second spaced lamination segments, said inner and outer legs being generally parallel and also having a generally parallel grain orientation, yoke segments connecting corresponding ends of said inner and outer legs and having a grain orientation generally perpendicular to the grain orientation of said legs, first and second triangular shaped lamination segments disposed one at each of the joints between the yoke segments and each of the opposite inner leg ends, each of said triangular segments arranged with a corner thereof directed inwardly and with the angularly related edges on both sides of said corner abutting complementary angled edges on the lamination segments forming the inner leg, said first and second triangular segments having a grain orientation at an angle to the grain orientation of both said inner leg and said yoke segments, one of the yokes formed by said yoke segments including a third triangular segment having an edge abutting an edge of said first triangular segment and providing the connection of said first triangular segment to its respective yoke, and the grain orientation of said third triangular segment being parallel to that of said yoke of which said third triangular segment is a part.

Claim 3

The core lamination of claim 1 wherein the grain orientation of said first and second triangular segments is generally perpendicular to one of the butt joints between said first and second triangular segments and said inner leg.

Claim 4

The core lamination of claim 1 wherein the angle of the grain orientation of the first and second triangular segments to that of said yoke segments and said inner leg is approximately within the range of 35*-55*.

Claim 5

The core lamination of claim 3 wherein said angle of triangular segment grain orientation to the grain orientation of said yoke segments and inner leg is approximately 45*.

Claim 6

The core lamination of claim 1 wherein said first and second triangular segments have relatively different dimensions from the inwardly facing corner thereof to the butt connection with said yoke segment and said third triangular segment, and said first and second triangular segments are offset relative to each other and with respect to said inner leg, whereby when two of said laminations identically constructed are reversed an overlap is provided at each butt engagement in the joints between the inner leg and yoke segments.

Claim 7

A transformer core comprised of laminations in accordance with claim 1 wherein said laminations are stacked and periodically reversed with the grain orientation of said triangular segments of adjacent reversed laminations generally overlapping each other and being oppositely angled relative to each other.

Claim 8

A split magnetic transformer core comprising stacked laminations, each of said laminations comprising first and second outer generally parallel, spaced legs, a split inner leg made of first and second spaced lamination segments arranged generally parallel to said outer legs, said inner and outer legs being generally parallel and also having generally parallel grain orientations, first and second yokes each including inner and outer parallel, spaced yoke segments and connecting corresponding ends of said inner and outer legs, said yoke segments have a grain orientation generally perpendicular to the grain orientation of said legs, first and second triangular shaped lamination segments disposed one in each of the joints between the yokes and each of the opposite inner leg ends, each of said first and second triangular segments arranged with a corner thereof directed inwardly toward the inner leg and the angularly related edges on both sides of said corner abutting complementary angled edges in said inner yoke segments and in the lamination segments fOrming the inner leg, said first and second triangular segments have a grain orientation at an angle to the grain orientation of both said inner leg and said yoke segments, the grain orientations of said first and second triangular segments being generally in the same direction so that when stacked the grain orientations of relatively reversed first and second triangular segments are oppositely angled, said first triangular segment projecting beyond said inner yoke segment and abutting the outer yoke segment of one said yokes and the other yoke including a third triangular segment in the outer segment thereof and projecting beyond that outer segment and abutting said second triangular segment, the grain orientation of said third triangular segment being parallel to that of said yoke of which said third triangular segment is a part, and said first and second triangular segments being offset relative to each other and with respect to said inner leg, whereby when said laminations are stacked and periodically reversed an overlap is provided at each butt connection in the inner leg joint with said yokes.

Claim 9

A split magnetic transformer core comprising stacked laminations, each of said laminations comprising first and second outer generally parallel, spaced legs, a split inner leg made of first and second spaced lamination segments arranged generally parallel to said outer legs, said inner and outer legs being generally parallel and also having generally parallel grain orientations, first and second yokes each including inner and outer parallel, spaced yoke segments and connecting corresponding ends of said inner and outer legs, said yoke segments have a grain orientation generally perpendicular to the grain orientation of said legs, first and second triangular shaped lamination segments disposed one in each of the joints between the yokes and each of the opposite inner leg ends, each of said first and second triangular segments arranged with a corner thereof directed inwardly toward the inner leg and the angularly related edges on both sides of said corner abutting complementary angled edges in said inner yoke segments and in the lamination segments fOrming the inner leg, said first and second triangular segments have a grain orientation at an angle to the grain orientation of both said inner leg and said yoke segments, the grain orientations of said first and second triangular segments being generally in the same direction so that when stacked the grain orientations of relatively reversed first and second triangular segments are oppositely angled, said first triangular segment projecting beyond said inner yoke segment and abutting the outer yoke segment of one said yokes and the other yoke including a third triangular segment in the outer segment thereof and projecting beyond that outer segment and abutting said second triangular segment, the grain orientation of said third triangular segment being parallel to that of said yoke of which said third triangular segment is a part, and said first and second triangular segments being offset relative to each other and with respect to said inner leg, whereby when said laminations are stacked and periodically reversed an overlap is provided at each butt connection in the inner leg joint with said yokes.

Claim 10

The core of claim 7 wherein the grain orientation of each of said first and second triangular segments is generally perpendicular to one of the butt joints between said first and second triangular segments and said inner leg.

Claim 11

A lamination construction for a magnetic transformer core comprising, in combination, a pair of outer legs, an inner leg, yoke segments connecting corresponding ends of said inner and outer legs, first and second triangular shaped lamination segments disposed one at each of the joints between the yoke segments and each of the opposite inner leg ends, each of said triangular segments arranged with a corner thereof directed inwardly toward the inner leg and the angularly related edges on both sides of said corner abutting complementary angled edges on the lamination segments forming the inner leg, one of the yokes formed by said yoke segments including a third triangular segment and providing the connection of said first triangular segment to its respective yoke, and said first and second triangular segments having a grain orientation at an angle to one of the butt joints between said first and second triangular segments and said inner leg and the grain orientation of said third triangular segment being parallel to that of said yoke of which said third triangular segment is a part.

Claim 12

A lamination construction for a magnetic transformer core comprising, in combination, a pair of outer legs, an inner leg, yoke segments connecting corresponding ends of said inner and outer legs, first and second triangular shaped lamination segments disposed one at each of the joints between the yoke segments and each of the opposite inner leg ends, each of said triangular segments arranged with a corner thereof directed inwardly toward the inner leg and the angularly related edges on both sides of said corner abutting complementary angled edges on the lamination segments forming the inner leg, one of the yokes formed by said yoke segments including a third triangular segment and providing the connection of said first triangular segment to its respective yoke, and said first and second triangular segments having a grain orientation at an angle to one of the butt joints between said first and second triangular segments and said inner leg and the grain orientation of said third triangular segment being parallel to that of said yoke of which said third triangular segment is a part.

Claim 13

The lamination of claim 9 wherein said first and second triangular segments have a grain orientation generally perpendicular to one of the butt joints between said first and second triangular segments and said inner leg.