US 12,256,476 B2
Device for the inductive heating of a workpiece in a rolling mill
Heinz Fürst, Gallneukirchen (AT); Thomas Lengauer, Weißkirchen a.d. Traun (AT); Bernd Linzer, Leombach (AT); and Michael Zahedi, St. Marien (AT)
Assigned to PRIMETALS TECHNOLOGIES AUSTRIA GMBH, (AT)
Appl. No. 17/422,237
Filed by Primetals Technologies Austria GmbH, Linz (AT)
PCT Filed Jan. 13, 2020, PCT No. PCT/EP2020/050642
§ 371(c)(1), (2) Date Jul. 12, 2021,
PCT Pub. No. WO2020/148202, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. A 50022/2019 (AT), filed on Jan. 14, 2019; and application No. 19172983 (EP), filed on May 7, 2019.
Prior Publication US 2022/0086962 A1, Mar. 17, 2022
Int. Cl. H05B 6/10 (2006.01); B21B 45/00 (2006.01); H01B 7/42 (2006.01); H05B 6/04 (2006.01); H05B 6/40 (2006.01)
CPC H05B 6/101 (2013.01) [B21B 45/004 (2013.01); H01B 7/423 (2013.01); H05B 6/04 (2013.01); H05B 6/40 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device for inductive heating of a workpiece in a rolling mill, wherein the device comprises:
a converter for producing a two-phase alternating voltage,
a capacitor bank electrically connected to the converter and the capacitor bank comprising a plurality of capacitors connected in parallel,
a working zone that includes a coil car, in which an upper coil and a lower coil are arranged, wherein the workpiece can be moved through between the coils such that the workpiece is thereby inductively heated by transverse-field heating,
a housing fixed next to the rolling mill, and arranged next to, below or above the working zone, wherein the converter and the capacitor bank are arranged in the housing, and the coil car is movable away or toward the housing,
a first flexible cable and a second flexible cable;
the upper coil is electrically connected to the capacitor bank by the first flexible cable,
the lower coil is electrically connected to the capacitor bank by the second flexible cable,
the flexible cables are configured as coaxial cables, wherein one phase of the alternating voltage is on an inner conductor and another phase of the alternating voltage is on an outer conductor of each of the coaxial cables,
the cables are configured to be cooled by a fluid; and
a first conductor rail and a second conductor rail residing at least partially in the housing, wherein the converter is electrically connected to the first and the second rails inside the housing, the plurality of capacitors are electrically connected to the first and the second conductor rails inside the housing and are connected in parallel via the first and the second conductor rails inside the housing, wherein the first flexible cable electrically connects the first and the second conductor rails to the upper coil, and the second flexible cable electrically connects the first and the second conductor rails to the lower coil.