Patent ID: 9553495
Date: 2017-01-24
CPC Classifications: H01F,H02K,Y10T

Claim:
1. A wound core formed by winding a magnetic thin band in the axial direction, wherein one or more cutout portions are formed from place to place on an end face of the thin band in the axial direction and the cutout portions are arranged in random directions in the direction of the radius of the wound core, wherein the cutout portions separate the magnetic thin band into a plurality of partitioned magnetic thin bands wherein each of the partitioned magnetic thin bands are of a sufficient length to traverse at least one complete rotation in the radial direction around a center of the wound core, wherein the wound core having a different shape from a cylindrical shape wound core is obtained by pressing the cylindrical shape wound core placed in core placement cavities respectively formed in dies and by annealing the wound core being kept housed in the dies, and wherein the length of the thin band is limited in order to reduce the eddy current loss of the wound core.