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

FIELD: electrical engineering.

SUBSTANCE: wound core comprising a section in which regular grain oriented steel sheets in which flat sections and curved sections are alternately continuous in the longitudinal direction are stacked on top of each other in the thickness direction of the sheet. The wound core is formed by stacking regular grain oriented steel sheets that are individually bent, layered and assembled into a strip shape. When the average length of the curved roughening member in the width direction intersecting the longitudinal direction forming the surface of the curved portion of the regular grain oriented steel sheet is RSm(b), and the average length of the curved roughening member in the width direction forming the surface of the flat section of the grain oriented steel sheet, is RSm(s), are in the ratio of 1.00<RSm(b)/RSm(s)≤5.00.

EFFECT: reduction of losses in the core.

6 cl, 10 dwg