STRIP CORE, METHOD FOR MANUFACTURING STRIP CORE, AND DEVICE FOR MANUFACTURING STRIP CORE Russian patent published in 2023 - IPC H01F27/245 H01F3/04 H01F41/02 

FIELD: electrical engineering.

SUBSTANCE: strip core (10) includes rectangular hollow portion (15) at the centre and a portion in which grain-oriented electrical steel sheets (1), in which flat portions (4) and curved portions (5) are alternately continuous in the longitudinal direction, are laid on top of each other in the direction of the sheet thickness, which is the strip core. The strip core is formed by stacking regular grain oriented steel sheets that are individually bent, layered and assembled into a strip shape. A plurality of grain-oriented electrical steel sheets are connected to each other through at least one connecting part (6) for each turn. Curved portion (5) of the laid grain-oriented electrical steel sheet (1) has an average Vickers hardness of 190-250 HV in cross section L in the longitudinal direction, which is the cross-section of grain-oriented electrical steel sheet (1) in the thickness direction.

EFFECT: reduced iron losses in the core.

3 cl, 10 dwg, 10 tbl