TEXTURED SHEET OF ELECTRICAL STEEL, TAPE CORE OF TRANSFORMER FROM TEXTURED SHEET OF ELECTRICAL STEEL AND METHOD OF MAKING TAPE CORE Russian patent published in 2021 - IPC C21D8/12 H01F1/147 H01F27/245 H01F41/02 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the electrical equipment. In a textured sheet of electrical steel used for making a transformer belt core, thickness t of steel sheet and degree of deterioration of losses in iron, obtained during magnetization of steel sheet along elliptic trajectory and defined by formula ((W_A-W_B)/W_B)×100, satisfy following ratios: when sheet thickness t ≤ 0.20 mm, degree of loss deterioration in iron is not more than 60%; when 0.20 mm < sheet thickness t<0.27 mm, degree of deterioration of losses in iron is not more than 55%; and when 0.27 mm ≤ thickness of sheet t, degree of deterioration of losses in iron is not more than 50%. W_A is loss in iron during magnetisation along elliptic trajectory, frequency is 50 Hz, magnetic flux of 1.7 T in direction RD (rolling direction) and magnetic flux of 0.6 T in direction TD (direction perpendicular to rolling direction), and W_B are losses in iron during remagnetization, frequency 50 Hz, magnetic flux 1.7 T in direction RD.

EFFECT: technical result is reduction of losses in iron of transformer.

7 cl, 14 dwg, 3 tbl