EP3324703A1 - Dispositif de chauffage par induction à des fins industrielles - Google Patents

Dispositif de chauffage par induction à des fins industrielles Download PDF

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Publication number
EP3324703A1
EP3324703A1 EP16199592.3A EP16199592A EP3324703A1 EP 3324703 A1 EP3324703 A1 EP 3324703A1 EP 16199592 A EP16199592 A EP 16199592A EP 3324703 A1 EP3324703 A1 EP 3324703A1
Authority
EP
European Patent Office
Prior art keywords
radiator
induction
magnetic yoke
magnetic
induction coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP16199592.3A
Other languages
German (de)
English (en)
Inventor
Mathias Jotter
Borgar Pfeiffer
Hauke RAMM
Jochen Stegelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KENDRION KUHNKE AUTOMATION GmbH
Original Assignee
Kendrion Kuhnke Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kendrion Kuhnke Automotive GmbH filed Critical Kendrion Kuhnke Automotive GmbH
Priority to EP16199592.3A priority Critical patent/EP3324703A1/fr
Publication of EP3324703A1 publication Critical patent/EP3324703A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces

Definitions

  • the invention relates to an induction heating device for industrial purposes or applications, and to a method for operating an induction heating device.
  • the object of the invention is to provide a heating system for industrial applications or purposes, such as in a packaging machine or the like, wherein in particular a distributed homogeneous homogeneous temperature, for example for a gluing process or sealing process, are provided should.
  • an induction heater for industrial purposes or industrial applications with at least one charged with AC induction coil surface inductor and a heatable by the foundedninduktor radiator having a surface facing the surface inductor and with a magnetic yoke for the leadership of the induction coil generated or generated magnetic field, wherein the induction coil and the magnetic yoke are formed such that via the surface of the heater surface facing the surface of the radiator, a constant power input per surface for heating the radiator takes place and in the radiator on the surface of the surface facing the surface area a homogeneous temperature field is generated or generated is.
  • the induction heating means as an induction coil on an electric coil, by means of which a magnetic field in alternating polarization for generating heat in a penetrated by the alternating magnetic field, electrically conductive heating element, in particular heating plate or the like can be generated.
  • the induction heating device is used, for example, in industrial induction heating systems for mechanical engineering used or used, in which in particular a temperature field with a low temperature gradient or at a constant temperature, ie a homogenized temperature field for the adhesive or sealing processes or the like is needed.
  • induction heater in induction hardening equipment, induction heating furnaces, induction heating rolls or induction ovens with control units, where a distributed homogeneous temperature with close tolerances, for example, for adhesive processes or sealing processes is required.
  • the radiator formed as a flat heating plate the field distribution of the magnetic field by the shape of the induction coil and the design of the magnetic yoke to guide the (alternating) magnetic field is set.
  • the magnetic yoke the magnetic field generated by the induction coil is guided so that a preferred or optimal coupling of the magnetic field in the soft magnetic, electrically conductive radiator takes place.
  • this makes it possible to heat the heating element or the heating plate, which is arranged opposite the induction coil, in such a way that the heating element has a homogenized temperature field on its heat-emitting side or contact side.
  • the induction coil and the magnetic yoke are formed and optionally matched in their geometric dimensions, it is possible that over the entire surface of the radiator, which faces the legislativeninduktor transmitted a predetermined, constant power per area by means of the alternating magnetic field whereby a uniform temperature field at a predetermined temperature with a tolerance of less than ⁇ 5% in the heating element over the whole surface, preferably less than ⁇ 3% or less than ⁇ 1%.
  • the induction coil is designed as a cylindrical coil or flat coil and / or that the radiator is designed as a heating plate.
  • the heating element or the heating plate has a flat surface facing the induction coil.
  • the radiator is designed as a cuboid heating plate.
  • the magnetic yoke is formed such that the induction coil is surrounded by the magnetic yoke or received therein.
  • the induction coil has at least one non-uniform winding, as a result of an uneven arrangement of the winding of the coil, for example as a flat coil, on the entire coupling surface of the coil to the radiator, in particular hotplate, a uniform coupling of the magnetic field is achieved, since in field areas with strong coupling to the radiator, the distances between the turns, in particular individually, are increased, while in field areas with weak coupling, the turns a closer distance exhibit.
  • This results in a non-equidistant or uniformly wound coil so that over the entire coupling surface of the induction coil to the radiator uniform or substantially uniform coupling is achieved, taking into account different coupling regions.
  • a predetermined, preferably optimal, field distribution of the magnetic field is formed for a homogeneous temperature distribution in the heating element or the heating plate.
  • the surface inductor in addition to the induction coil, at least one local winding, an additional winding, in particular in a different winding plane than the winding plane of the induction coil, and / or at least one local additional coil, preferably at a predetermined position. so that in this way the coupling between the induction coil and the radiator is specifically influenced.
  • the auxiliary winding (s) or auxiliary coil (s) are possible in areas of weak coupling or in areas of local modifications of the coil winding course, for example in planar or spatially formed meandering serpentine lines.
  • an embodiment of the induction heating device is characterized in that the magnetic yoke soft magnetic material, in particular soft magnetic ferrite, or made of soft magnetic material, in particular ferrite, is made.
  • the magnetic yoke of soft magnetic ferrite material is formed, which is formed or shaped so that the coupling of the magnetic field is strongly attenuated by portions of the Magnetjochs magnetically strongly coupled to the radiator areas and the coupling of the magnetic field at magnetic weakly coupled to the radiator areas is reinforced by sections of the magnetic yoke.
  • the magnetic yoke has at least one recess and / or the magnetic yoke in individual sections having different cross sections, so that the field profile of the magnetic field is modifiable or modified.
  • the magnetic yoke is configured such that the flux path of the magnetic flux amplifies the coupling regions of the heating element with weak coupling to the magnetic yoke and weakens the coupling regions of the heating element with weak coupling to the magnetic yoke.
  • the radiator facing end surfaces of the magnetic yoke are adapted or formed so that the flow of the magnetic flux at least one coupling region of the radiator is weakly coupled to the magnetic yoke and / or the flow of the magnetic flux at least a coupling region of the radiator is attenuated with strong coupling to the yoke.
  • the distance between the radiator facing end surfaces of the magnetic yoke and the radiator is adjustable and / or that at least two areas of the radiator facing end faces of the magnetic yoke have different distances to the radiator.
  • the end faces of the magnetic yoke in their cross section and / or in their position to the radiator are designed so that the distance between the end faces to the radiator and thus also an air gap between the Magnetic yoke and the radiator are locally adjustable.
  • the inner transition of the yoke to the radiator in a magnetic yoke with a flat coil to a minimum possible distance reset or stepped formed and / or the outer transition of the magnetic yoke to the radiator is not carried out in the spatially maximum possible training.
  • the magnetic yoke may be formed such that in several sections, the end faces of the magnetic yoke to the hot plate have different distances.
  • the flow pattern of the magnetic flux can be selectively influenced or effected by amplification or attenuation.
  • the distances can be formed by a linear or non-linear course relative to the surface of the heating plate to the end face of the magnetic yoke.
  • the object is achieved by a method for operating an above-described induction heating device for industrial purposes or industrial applications, wherein the induction coil and the magnetic yoke are designed such that a constant power input per area for heating the radiator is effected via the surface of the radiator facing the surface inductor, and a homogeneous temperature field is generated in the radiator via the surface facing the surface inductor.
  • the induction coil and the magnetic yoke are designed such that a constant power input per area for heating the radiator is effected via the surface of the radiator facing the surface inductor, and a homogeneous temperature field is generated in the radiator via the surface facing the surface inductor.
  • Fig. 1 shows in a perspective view of a semi-model, an induction heater 10 for industrial applications or purposes.
  • the induction heater 10 has an electrically conductive heating plate 12, which is cuboid and has flat surfaces.
  • a magnetic yoke is arranged according to the outer dimensions of the heating plate 12, wherein in the magnetic yoke 14, an induction coil 16 is received.
  • the induction coil 16 is formed here as a flat coil, wherein the windings of the induction coil 16 are arranged spirally.
  • the induction coil 16 is operated or acted upon by an alternating electrical voltage, so that an alternating electromagnetic field is generated by the induction coil 16, so that 16 eddy currents and Ummagnetmaschineen in the heating plate 12 are generated by the electromagnetic alternating field of the induction coil, whereby the power in the heating plate 12 is transferred, so that a homogeneous temperature distribution in the heating plate 12 over the entire surface of the heating plate 12, which faces the induction coil, is effected.
  • the heating plate 12 is hereby made of a soft magnetic and electrically conductive material.
  • the induction coil 16 has windings 161, 162, 163 which have different distances from one another, for example, the inner windings 161 are spaced closer to each other than the middle windings 162.
  • the outer windings 163 are in turn in a smaller Spaced apart from each other as the central windings 162.
  • the closely adjacent turns 161 are disposed in field regions with weak coupling to the heating plate 12, while the more widely spaced (middle) turns 162 are arranged in regions of strong coupling.
  • the outer closely adjacent turns 163 are also arranged in field regions with a strong coupling between the induction coil 16 and the heating plate 12.
  • the magnetic yoke 14 is preferably made of soft magnetic ferrite material, wherein the magnetic yoke 14 is formed such that magnetically strongly coupled to the heating plate 12 regions undergo a weakening of the coupling and magnetically weakly coupled regions are enhanced.
  • induction heater 10 differs from the in Fig. 1 illustrated induction heating device 10 characterized in that in addition to the weak coupling in addition to a local location, an additional coil 166 is formed above the formed as a flat coil induction coil 16.
  • an additional turn 165 can also be arranged above the (normal) winding plane of the induction coil 16 in this region of the weak coupling.
  • the additional winding can also be arranged below the winding plane of the induction coil 16.
  • Fig. 3 is shown in the perspective view of the magnetic yoke 14 that the magnetic yoke 14 has on the bottom recesses 141, which are arranged in the region of strong coupling of the magnetic field with the heating plate 12.
  • the end face 142 may have flats 143, for example, on the longitudinal side. As a result, the distance between the magnetic yoke 14 and the heating plate 12 is varied. Furthermore, the end face 142 may also have elevations or elevations at local positions.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
EP16199592.3A 2016-11-18 2016-11-18 Dispositif de chauffage par induction à des fins industrielles Pending EP3324703A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16199592.3A EP3324703A1 (fr) 2016-11-18 2016-11-18 Dispositif de chauffage par induction à des fins industrielles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16199592.3A EP3324703A1 (fr) 2016-11-18 2016-11-18 Dispositif de chauffage par induction à des fins industrielles

Publications (1)

Publication Number Publication Date
EP3324703A1 true EP3324703A1 (fr) 2018-05-23

Family

ID=57348579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16199592.3A Pending EP3324703A1 (fr) 2016-11-18 2016-11-18 Dispositif de chauffage par induction à des fins industrielles

Country Status (1)

Country Link
EP (1) EP3324703A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115418453A (zh) * 2022-08-30 2022-12-02 湖南大学 用于吸能结构局部均匀强化与弱化的处理系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2196568A1 (fr) * 1972-08-18 1974-03-15 Mitsubishi Electric Corp
US4999467A (en) * 1989-01-23 1991-03-12 Nikko Corporation Ltd. Low-frequency electromagnetic induction heater
WO2000035248A1 (fr) * 1998-11-26 2000-06-15 Linlan Induction Ab Dispositif de chauffage par induction et son procede de commande
DE102007059812A1 (de) 2007-12-11 2009-06-18 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine mit Induktionsheizung
US20110297668A1 (en) * 2010-06-04 2011-12-08 Watlow Electric Manufacturing Company Inductive heater humidifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2196568A1 (fr) * 1972-08-18 1974-03-15 Mitsubishi Electric Corp
US4999467A (en) * 1989-01-23 1991-03-12 Nikko Corporation Ltd. Low-frequency electromagnetic induction heater
WO2000035248A1 (fr) * 1998-11-26 2000-06-15 Linlan Induction Ab Dispositif de chauffage par induction et son procede de commande
DE102007059812A1 (de) 2007-12-11 2009-06-18 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine mit Induktionsheizung
US20110297668A1 (en) * 2010-06-04 2011-12-08 Watlow Electric Manufacturing Company Inductive heater humidifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115418453A (zh) * 2022-08-30 2022-12-02 湖南大学 用于吸能结构局部均匀强化与弱化的处理系统及方法
CN115418453B (zh) * 2022-08-30 2023-11-24 湖南大学 用于吸能结构局部均匀强化与弱化的处理系统及方法

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