US 12,217,904 B2
Transformer apparatus
Nikolay Tal, Karmiel (IL); and Tzachi Glovinsky, Petah Tikva (IL)
Assigned to Solaredge Technologies Ltd., Herzeliya (IL)
Filed by Solaredge Technologies Ltd., Herzeliya (IL)
Filed on Sep. 19, 2023, as Appl. No. 18/469,624.
Application 18/469,624 is a continuation of application No. 17/465,987, filed on Sep. 3, 2021, granted, now 11,798,733.
Claims priority of provisional application 63/074,139, filed on Sep. 3, 2020.
Prior Publication US 2024/0062952 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 27/32 (2006.01); G01R 29/20 (2006.01); G01R 31/62 (2020.01); H01F 27/36 (2006.01)
CPC H01F 27/323 (2013.01) [G01R 29/20 (2013.01); G01R 31/62 (2020.01); H01F 27/36 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a magnetic core comprising a core leg;
inner windings disposed around the core leg;
outer windings disposed around the inner windings, wherein the outer windings comprise outer winding edges;
an insulation layer between the inner windings and the outer windings, wherein the insulation layer extends beyond the outer winding edges and shields the outer windings from the inner windings;
an inner semiconducting layer between the inner windings and the insulation layer;
an outer semiconducting layer between the insulation layer and the outer windings, wherein the outer semiconducting layer comprises outer semiconducting layer edges aligned with the outer winding edges; and
stress control material different from an insulating material of the insulation layer, wherein the stress control material is disposed adjacent to the outer winding edges and adjacent to the insulating material of the insulation layer, wherein the stress control material comprises a material with a relative permittivity greater than or equal to ten.