US 12,243,680 B2
Method and device for producing soft magnetic strip material for strip ring cores
Christian Polak, Blankenbach (DE)
Assigned to VACUUMSCHMELZE GMBH & CO. KG, Hanau (DE)
Filed by Vacuumschmelze GmbH & Co. KG, Hanau (DE)
Filed on Feb. 4, 2020, as Appl. No. 16/781,142.
Application 16/781,142 is a continuation of application No. 14/394,582, granted, now 10,580,571, previously published as PCT/DE2012/200027, filed on Apr. 16, 2012.
Prior Publication US 2020/0185151 A1, Jun. 11, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 41/04 (2006.01); C21D 1/26 (2006.01); C21D 9/00 (2006.01); F27B 17/00 (2006.01); F27D 3/00 (2006.01); H01F 1/153 (2006.01); H01F 3/04 (2006.01); H01F 27/25 (2006.01); H01F 41/02 (2006.01)
CPC H01F 41/04 (2013.01) [F27B 17/0016 (2013.01); F27D 3/0024 (2013.01); H01F 1/15333 (2013.01); H01F 3/04 (2013.01); H01F 27/25 (2013.01); H01F 41/0226 (2013.01); F27D 2003/0034 (2013.01); H01F 1/15316 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method comprising:
preparing a band-shaped material;
heat-treating the band-shaped material at a heat-treatment temperature;
applying a tensile force to the band-shaped material in a longitudinal direction of the band-shaped material during the heat-treating in order to produce a tensile stress in the band-shaped material, thereby producing the soft magnetic strip material from the band-shaped material;
determining at least one first one measurement value and a second measurement value of the band-shaped material during the heat-treating and while applying the tensile force, the at least one first measurement value representing at least one first magnetic parameter and the second measurement value representing a local magnetic cross-sectional area;
controlling, within a production line, the permeability of the soft magnetic strip by controlling the tensile force in response to the at least one first measurement value during the heat-treating and while applying the tensile force;
determining a strip length representing a length of the soft magnetic strip required for producing a magnetic core based on the second measurement value; and, subsequently,
winding the determined strip length of the soft magnetic strip to produce an annular tape-wound core.