TEXTURED SHEET OF ELECTRICAL STEEL, TRANSFORMER STACKED CORE FROM TEXTURED SHEET OF ELECTRICAL STEEL AND METHOD OF MAKING A STACKED CORE Russian patent published in 2021 - IPC H01F1/147 H01F27/245 H01F41/02 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the electrical equipment. In the electrical steel textured sheet used to make the transformer core, the thickness t of the steel sheet and degree of deterioration of losses in iron, obtained during magnetization of steel sheet along elliptic trajectory and determined by formula ((W_A-W_B)/W_B)×100), satisfy following ratios: when plate thickness t ≤ 0.20 mm, degree of deterioration in iron losses is 85% or less; when 0.20 mm < sheet thickness t < 0.27 mm, degree of deterioration in iron losses is 80% or less; and when 0.27 mm ≤ plate thickness t, degree of deterioration of losses in iron is 75% or less. In formula W_A - losses in iron at magnetisation along elliptic trajectory, frequency 50 Hz, magnetic flux 1.7 T in direction RD (rolling direction) and magnetic flux of 1.0 T in direction TD (direction perpendicular to rolling direction), and W_B are losses in iron during remagnetising, frequency 50 Hz, magnetic flux 1.7 T in direction RD.

EFFECT: technical result consists in reduction of losses in iron of transformer when used for making transformer core.

7 cl, 15 dwg