RIBBON CORE Russian patent published in 2024 - IPC H01F27/245 H01F1/147 C21D8/12 C22C38/02 

FIELD: electrical engineering.

SUBSTANCE: strip core comprises a main part of a strip core obtained by laying a plurality of polygonal annular sheets of anisotropic electrical steel in a side view, and this sheet of anisotropic electrical steel has flat parts and curved parts, which continuously alternate in the longitudinal direction, and in the flat part about at least one curved part, when the difference in the three-dimensional orientation of the crystal between two adjacent points in a row of points located at equal intervals in the direction of the length of the bent part is equal to ϕ, total number of measured data items ϕ is equal to Nx, the number of data elements satisfying the condition ϕ ≥ 1.0°, is equal to Nt, the number of data elements satisfying the condition ϕ, is 1.0° or more and less than 2.5°, is equal to Na, the number of data elements that satisfy the condition ϕ, is equal to 2.5° or more, but less than 4.0°, is equal to Nb, and the number of data elements that satisfy the condition ϕ, is equal to 4.0° or more, is equal to Nc, following formulas (1) - (4) are satisfied: 0.10 ≤ Nt/Nx ≤ 0.80 (1); 0.37 ≤ Nb/Nt ≤ 0.80 (2); 1.07 ≤ Nb/Na ≤ 4.00 (3); Nb/Nc ≥ 1.10 (4).

EFFECT: optimum efficiency in compliance with magnetic properties of steel sheet material.

1 cl, 9 dwg, 7 tbl