US 12,033,782 B2
Stacked core for stationary induction apparatus
Yuusuke Shima, Mie (JP); and Hiromu Shiota, Mie (JP)
Assigned to Toshiba Industrial Products and Systems Corp., Kanagawa (JP)
Appl. No. 17/290,312
Filed by Toshiba Industrial Products and Systems Corp., Kanagawa (JP)
PCT Filed Oct. 23, 2019, PCT No. PCT/JP2019/041505
§ 371(c)(1), (2) Date Apr. 30, 2021,
PCT Pub. No. WO2020/090577, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-206549 (JP), filed on Nov. 1, 2018.
Prior Publication US 2021/0391111 A1, Dec. 16, 2021
Int. Cl. H01F 27/24 (2006.01); H01F 27/245 (2006.01)
CPC H01F 27/245 (2013.01) 6 Claims
OG exemplary drawing
 
1. A stacked core for a stationary induction apparatus comprising:
upper and lower yoke portions configured by stacking a plurality of plate-shaped magnetic members; and
at least two leg portions configured by stacking a plurality of plate-shaped magnetic members and vertically connecting both ends of the upper and lower yoke portions, the stacked core being configured by butt-joining the yoke portions and the leg portions, wherein
joint surfaces where the yoke portions and the leg portions are joined have protrusions formed from the plurality of magnetic members, and recesses formed from the plurality of magnetic members alternately, and the yoke portions and the leg portions are configured to be butted in such a form that the protrusions and the recesses mesh with each other,
sheet-like magnetic insulators are each disposed in a butt-joint portion between the protrusions and the recesses in such a form as to bend in a bellows shape along a butt line, and an air gap is provided, and
in a relationship between the number of the stacked magnetic members forming each of the protrusions and the number of the stacked magnetic members forming each of the recesses, the number of the stacked magnetic members forming each of the protrusions is made smaller than the number of the stacked magnetic members forming each of the recesses corresponding to a thickness of the magnetic insulator.