Transverse flux induction heating apparatus

Patent metadata

Field	Value
Publication number	US-2018317285-A1
Application number	US-201615740136-A
Country	US
Kind code	A1
Filing date	Jun 29, 2016
Priority date	Jun 30, 2015
Publication date	Nov 1, 2018
Grant date	—

Abstract

A transverse flux induction heating apparatus ( 1, 100 ), defining a first longitudinal axis (X, R), for heating a metallic strip ( 11 ), the apparatus comprises at least two induction coils ( 2, 4; 102, 104 ) arranged on respective planes parallel to each other and parallel to said first longitudinal axis, and mutually arranged at a distance such to allow the passage of the strip between said at least two induction coils along a second longitudinal axis (Y, S) perpendicular to said first longitudinal axis; at least two compensation poles ( 20, 22, 24, 26; 120, 124 ), each compensation pole being constrained to a respective induction coil; wherein each compensation pole comprises a winding ( 28, 128 ), having at least one turn ( 29, 129 ), and a first auxiliary magnetic flux concentrator ( 30, 130 ) surrounded by the at least one turn; wherein at least one of said at least two compensator poles is adapted to move along the first longitudinal axis.

First claim

1 . A transverse flux induction heating, defining a first longitudinal axis, for heating a metallic strip, the apparatus comprising:
at least two induction coils arranged on respective planes parallel to each other and, parallel to said first longitudinal axis, and mutually arranged at a distance such to allow a passage of the metallic strip between said at least two induction coils along a second longitudinal axis perpendicular to said first longitudinal axis, at least one main magnetic flux concentrator arranged about each induction coil; at least two compensation poles, each compensation pole being constrained to a respective induction coil, wherein each compensation pole comprises:
a winding having at least, one turn,
a first auxiliary magnetic flux concentrator surrounded by the at least one turn of the winding,

wherein at least'one of said at least two compensation poles is adapted move along, a direction parallel to the first longitudinal axis.

2 . The apparatus according to claim 1 , wherein the first auxiliary magnetic flux concentrator is a distinct element from the at least one turn.

3 . The apparatus according to claim 1 , wherein the at least two induction coils are arranged totally over and totally under a space intended for the passage of the metallic strip, respectively.

4 . The apparatus according to claim 1 , wherein the at least two compensation poles are arranged totally over and totally under a space intended for the passage of the metallic strip, respectively.

5 . The apparatus according to claim 1 4 , wherein each induction coil is fixed and provided with two compensation poles, and at least one compensation pole of said two compensation poles is slidingly fixed to said, induction coil, so as to be adapted to move along a direction parallel to said first longitudinal axis.

6 . The apparatus according to claim 5 , wherein both compensation poles of each induction coil are slidingly fixed thereto, so as to be adapted to move along a direction parallel to said first longitudinal axis.

7 . The apparatus according to claim 5 , wherein a second auxiliary magnetic, flux concentrator is associated to each first auxiliary magnetic flux concentrator, said second auxiliary magnetic flux concentrator being arranged externally to the at least one turn and in an innermore position, with reference to the second longitudinal axis, with respect to the corresponding first auxiliary magnetic flux concentrator.

8 . The apparatus according to claim 1 4 , wherein said at least two compensation poles are integrally fixed to a respective induction coil and wherein at least one induction coil of said at least two induction coils is adapted to, move along a direction parallel to said first longitudinal axis.

9 . The apparatus according to claim 8 , wherein said at least two induction coils are adapted to translate along a direction parallel to said first longitudinal axis.

10 . The apparatus according to claim 8 , wherein the winding of each compensation pole of each induction coil is an integral part of a respective induction coil.

11 . The apparatus according to claim 1 , wherein the first auxiliary magnetic flux concentrator is made of magnetic or ferromagnetic material.

12 . The apparatus according to claim 1 , wherein each winding comprises at least two turns.

13 . The apparatus according to claim 1 , wherein said winding is adapted to be fed by a source of alternating electric current.

14 . The apparatus according to claim 1 , wherein said at least one turn of the winding is provided therein with at least one pipe for a cooling fluid.

15 . The apparatus according to claim 1 , wherein said at least one turn and/or said at least two induction coils have a substantially polygonal or rectangular or square or triangular or hexagonal or circular or elliptical shape or a combination thereof.

Assignees

• Danieli Off Mecc

Inventors

• Minen Michele
• Guastini Fabio

Classifications

• H05B6/104 Primary

  metal pieces being elongated like wires or bands · CPC title

• H05B6/365

  using supplementary conductive or ferromagnetic pieces · CPC title