EP2183944A2 - Induction heater - Google Patents

Induction heater

Info

Publication number
EP2183944A2
EP2183944A2 EP08773966A EP08773966A EP2183944A2 EP 2183944 A2 EP2183944 A2 EP 2183944A2 EP 08773966 A EP08773966 A EP 08773966A EP 08773966 A EP08773966 A EP 08773966A EP 2183944 A2 EP2183944 A2 EP 2183944A2
Authority
EP
European Patent Office
Prior art keywords
induction heater
heater according
shafts
coil
yoke
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.)
Granted
Application number
EP08773966A
Other languages
German (de)
French (fr)
Other versions
EP2183944B1 (en
Inventor
Christoph FÜLBIER
Ingolf Hahn
Carsten BÜHRER
Thomas Braun
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.)
Zenergy Power GmbH
Original Assignee
Zenergy Power 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
Priority claimed from DE202007014930U external-priority patent/DE202007014930U1/en
Application filed by Zenergy Power GmbH filed Critical Zenergy Power GmbH
Publication of EP2183944A2 publication Critical patent/EP2183944A2/en
Application granted granted Critical
Publication of EP2183944B1 publication Critical patent/EP2183944B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Definitions

  • the invention relates to an induction heater with a DC-powered superconducting coil assembly on a yoke and a method for adjusting the yoke width.
  • An induction heater is known from DE 10 2005 061 670.4. To heat a billet of an electrically conductive material, the billet is rotated in a shaft between two legs of a cross-sectionally C-shaped yoke. A DC-powered, high-temperature superconducting coil sits on the yoke. As high-temperature superconducting (HTSL) cuprates superconductors are e.g. YBCO and more generally all superconductors (SL) with a SL transition temperature above the boiling point of liquid nitrogen. Induction heaters are usually integrated into a production line. Therefore, the induction heater must provide a heated billet within a timed cycle given by the production line.
  • HTSL high-temperature superconducting
  • an induction heater with an approximately E-shaped yoke is known, whose three limbs are designed as pole shoes and staggered by 120 degrees in each case in order to move a workpiece in the space between the pole shoes through the pole shoes.
  • AC-powered coil assemblies to heat inductively.
  • a further induction heater with an E-shaped yoke is known, on the center leg of which a first coil arrangement is seated and whose end legs are aligned with one another.
  • the workpiece to be heated is located between the spaced end faces the yoke of the yoke and is surrounded by a further coil assembly which is AC powered and primarily provides the power for inductive heating of the workpiece.
  • the invention has for its object to provide an induction heater for a per unit time increased billet output and low energy consumption.
  • the induction heater according to claim 1 has a cross-sectionally at least approximately E-shaped yoke of a middle leg between two outer legs, wherein the center leg and the two outer legs are connected by a transverse leg. At least one superconducting coil sits on one of the legs. Between the two outer legs and the middle leg is in each case a shaft in which a billet can be heated by turning in the shaft. Because the induction heater has two shafts, two billets can be heated at the same time. For example, when changing a heated billet against a new, cold billet another billet can be heated in the other shaft. Accordingly, the output of the induction heater increases.
  • the E-shape of the yoke makes it possible to significantly increase the output of heated billets with just one superconducting coil.
  • the coil is part a coil arrangement, which usually comprises at least the terminals for the coil.
  • the coil or the coil arrangement can sit on the middle leg.
  • two coils or coil arrangements on the transverse leg, preferably on both sides of the center leg each have a coil or coil arrangement sitting.
  • the two outer legs and the middle leg of the yoke are connected by a transverse leg.
  • the coil assembly or the coil is pushed to the stop on the transverse leg on the center leg. This allows a compact yoke with a correspondingly short magnetic return, whereby the efficiency of the induction heater is improved.
  • the legs of the yoke made of solid material. Because the coil is DC-powered, it is possible to dispense with the more expensive construction of a yoke made of layered metal sheets without having to accept eddy-current losses in the yoke caused by eddy currents. Due to the lack of lamination, which also includes electrical insulation, the magnetic fill factor is increased compared to a lathed variant. This allows either an increase in the magnetic field or a more cost-effective design by using simpler materials at the same magnetic field strength.
  • the coil assembly preferably has an evacuated chamber in which there is at least one HTS coil. The evacuated chamber allows good thermal insulation of the HTS coil.
  • the heat insulation is further improved if the HTS coil is encased in several layers of a metal-coated, preferably aluminum-coated foil.
  • the HTS coil can be held in the chamber by means of plastic bearings.
  • Thermal insulation between the coil assembly and the open ends of the wells reduces the necessary cooling power for the HTSC coil.
  • Particularly suitable are microporous thermal insulation.
  • a suitable material for thermal insulation is especially calcium silicate.
  • an infrared reflector reflecting in the direction of the billet can be, for example, a gold-coated ceramic in the ducts. This reduces heat losses.
  • a cross-sectionally U-shaped infrared reflector, in the free center of the billet is rotated.
  • an impact protection plate with a high compared to the yoke magnetic resistance for example made of stainless steel (V2A, V4A, etc.).
  • V2A, V4A, etc. stainless steel
  • the impact protection plates can, for example, each sit in two opposing longitudinal grooves in the corresponding shaft.
  • the shafts are tapered in the direction of the free ends of the legs, ie, the legs are thickened accordingly. This shortens the air gap between the free ends of the legs in which the billets are rotated. Accordingly, the magnetic resistance is reduced, and the maximum heating power and the efficiency are increased.
  • the manholes can be closed off from the environment by means of heat insulation.
  • the shafts closing thermal insulation are preferably movable.
  • the wells may be covered from the environment by non-magnetic protection plates. These guard plates prevent a rotating billet that has detached from its jig from leaving the shaft and damaging or injuring other machine parts or even persons.
  • the protective plates for opening the shafts are preferably movable.
  • the width of the shafts is adjustable. This allows the chutes to be adapted to different billet diameters. This can be done for example by moving or pivoting at least a lower part of the outer leg.
  • the lower part of the outer legs can also be segmented in a plane orthogonal to the axis of rotation. For field adaptation in the respective shaft, the segments can be moved or swiveled independently of each other.
  • the width of the shafts can be adjusted by interchangeably fixed to the legs of the yoke ferromagnetic metal plates.
  • Such metal plates may have a larger relative magnetic permeability than the yoke. This leads to a concentration of the magnetic flux through the metal plates and thus also through the billet rotated between the metal plates. If particularly large billets are to be heated, the metal plates may also have a lower relative permeability than the yoke, then the metal plates will act as a scatter, accordingly the magnetic flux will be more uniform.
  • the width of the shafts may increase from the end faces of the yoke towards the middle.
  • These ferromagnetic metal wedges can be exchangeably attached to the legs of the yoke. This geometry of the shafts reduces the stray fields emerging from the shafts at the ends of the yoke, and accordingly the magnetic flux is increased by the billets.
  • the HTS coil is preferably first switched off. Then then the width of the shafts can be easily changed.
  • the width of the shafts can be changed particularly easily if the yoke is demagnetized after switching off the coil and before changing the width.
  • a seated on the yoke coil assembly, in particular the superconducting coil assembly can be fed with alternating current.
  • the amperage of the AC supply is less than the rated current with DC supply. Preferably, it is about 10% to 20% of the rated current for DC power.
  • an induction heater according to the invention is shown by way of example. It shows:
  • FIG. 2 shows a cross section of the magnet unit of the induction heater of FIG. 1,
  • FIG. 3 is a side view of the magnet unit of the induction heater of FIG. 1,
  • FIG. 4 shows a longitudinal section (B / B from FIG. 3) of the induction heater
  • Fig. 6 is a schematic view of another magnet unit from below.
  • Fig. 10 each have a section through an induction heater.
  • the induction heater in Fig. 1 has a two-piece jig 2a, 2b, which holds a billet 10 in a shaft of a magnet unit 100.
  • the billet 10 is rotationally driven via a part of the clamping device 2 a, a gear 3 and a motor 1.
  • the clamping device 2a, 2b By means of the clamping device 2a, 2b, the billet 10 can be raised and lowered as indicated by the corresponding double arrow.
  • the clamping devices 2a, 2b can also be moved horizontally. This is also indicated by double arrows.
  • the billet 10 is in a slot 151 1 of a cross-sectionally E-shaped yoke 140, on the center leg of a coil assembly 120 is seated (see Fig .. 2 to Fig. 4).
  • the yoke 140 is E-shaped in cross-section and has two outer legs 142 1, 142 r which are connected via a transverse leg 141 with a WegSchenkel 143. Accordingly, between the outer leg 142 1 and the middle leg 143, a downwardly open slot 150 1 and between the outer leg 142 r and the middle leg 143 another likewise downwardly open slot 150 r.
  • the yoke 140 is made of a solid material.
  • the coil assembly 120 consists of an evacuated chamber 125 in which e.g. liquid nitrogen cooled HTSC coil 121 (cooling and electrical leads not shown).
  • the HTS coil 122 is fixed in the chamber 125 with a plastic retainer, not shown.
  • the HTSC coil 121 is housed in a case 122 which is enveloped by a plurality of layers of an AL evaporated polyester film as heat insulation. A good heat insulation can be achieved with about 40 to 60 layers of the film, wherein at the edges preferably 10 to 20 further layers.
  • each well 150 1, 150 r is an impact protection plate 153.
  • the impact protection plates 153 are made of a non-magnetic material, e.g. Stainless steel, and sitting in opposing longitudinal grooves 152 in its slot 150 1 and 150 r. For mounting the impact protection plates 153 are inserted from one of the end sides of the yoke in the longitudinal grooves 152 and then secured.
  • Impact protection plates 153 protect the coil assembly 120 from damage by a rotating billet 10, which has become detached from the clamping device 2a, 2b.
  • a heat insulation 154 here made of calcium silicate, immediately adjoins the impact protection plate 153. plates, on.
  • the thermal insulation 154, as well as the subsequent cross-sectionally U-shaped infrared reflector 158 of gold-fired ceramic, the coil assembly 120 and the yoke 140 protects against the heat of the billets 10. In addition, the losses are lower by heat release of the billet to the yoke ,
  • the shafts 150 1, 150 r are at their lower ends by interchangeable attached to the outer legs 142 1, 142 r and the middle leg 143 attached ferromagnetic plates 155, tapered.
  • the air gap between the legs 142 1, 142 r and 143 of the yoke 140 and the billets 10 is shortened and, correspondingly, the magnetic resistance of the magnet unit 100 is reduced.
  • the plates 155 have a larger magnetic permeability than the yoke 140. Therefore, the plates 155 concentrate the magnetic flux through the billets 10.
  • the embodiment shown here has the advantage that the shafts 1501, 15Or are effectively widened upwards, whereby the evacuated chamber 125 correspondingly larger fails and the insulation of the HTSC coil 121 is improved.
  • the replaceable attachment of the plates 155 allows easy mounting of the magnet unit 100 as well as an adaptation of the width of the shafts 1501, 15Or to the diameter of the billets 10 to be heated.
  • the thermal insulation 165 is located in a channel of three protective plates 157th Die
  • Protective plates 157 are made of a non-magnetic material, such as stainless steel, and serve accident prevention. Should a billet 10 unintentionally detach from the clamping device 2a, 2b during the heating, it can not leave the corresponding shaft 150 1, 150 r, that is to say damage neither other parts of the system nor does it injure persons. Zen.
  • the thermal insulation 156 and the protective plates 157 are indicated by double arrows, raised and lowered. As a result, the shafts 150 1, 150 r can be opened in order to insert a billet 100 from below into the corresponding shaft.
  • FIG. 5 corresponds substantially to the embodiment in Figs. 1 to 4 (same or similar parts are denoted by identical reference numerals), but the lower portions of the two outer legs 142 1 and 142 r are slidable to the width of the wells 150th 1, 150 r to billets 10 with different diameters to adapt.
  • the displaceable part of the two outer legs 142 1, 142 r is shown in two positions, wherein the open position is indicated by a hatching directed against the otherwise used for the yoke 140 otherwise hatching.
  • thermal insulation 154 and the infrared reflectors 154 can either be completely replaced or be telescopically adjustable in width (not shown).
  • the magnet unit 100 in Fig. 6 is substantially similar to the induction heaters of the other figures.
  • the plates 153 in Fig. 2 and Fig. 5 are metal wedges 155 b on the outer legs 142 1, 142 r and on both sides of the center leg 143 interchangeable and against each other slidably mounted.
  • the width of the shafts 150 1, 150 r increases from the end faces toward the center. This reduces stray fields emerging from the front and enables field adaptation to form a field profile.
  • the induction heaters 100 in FIGS. 7 to 10 are similar to the induction heater 100 in FIGS. 1 to 4. Therefore, identical reference numerals are used for the same or similar parts and only the differences are discussed.
  • the induction heater 100 in FIG. 7 has, instead of a coil arrangement on the center leg 143 as shown in FIGS. 1 to 4, a coil arrangement 120 on the right outer leg 142 r and a coil arrangement 120 on the left outer leg 142 1.
  • the induction heater 100 in FIG. 8 has only one coil arrangement which sits on the left outer leg 142 1 and is pushed onto the latter on the transverse leg 141 up to the stop.
  • FIG. 9 shows an induction heater 100 with a coil arrangement 120 which sits between the left outer leg 142 1 and the middle leg 143 on the transverse leg 141.
  • the left outer leg 142 1, unlike shown, disassembled.
  • FIG. 10 shows an induction heater 100, each having a coil arrangement 120 on both sides of the center leg 143, which sits on the transverse limb 141.
  • the two outer legs 142 1, 142 r are other than shown, disassembled.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Cookers (AREA)

Abstract

An induction heater for heating metallic billets with a yoke of E-shaped cross-section, on the middle limb of which a superconducting coil is seated, has a well located between the middle limb and each one of the respective two outer limbs. A billet can be heated by being rotated in each one of the two wells.

Description

Induktionsheizer induction heater
Die Erfindung betrifft einen Induktionsheizer mit einer gleichstromgespeisten supraleitenden Spulenanordnung auf einem Joch und ein Verfahren zum Einstellen der Jochbreite.The invention relates to an induction heater with a DC-powered superconducting coil assembly on a yoke and a method for adjusting the yoke width.
Ein Induktionsheizer ist aus der DE 10 2005 061 670.4 bekannt. Zur Erwärmung eines Billets aus einem elektrisch leitenden Werkstoff wird das Billet in einem Schacht zwischen zwei Schenkeln eines im Querschnitt C-förmigen Jochs gedreht. Auf dem Joch sitzt eine gleichstromgespeiste hoch- temperatursupraleitende Spule. Als hochtemperatursupralei- tend (HTSL) werden Cupratsupraleiter z.B. YBCO und allgemeiner alle Supraleiter (SL) mit einer SL-Sprungtemperatur oberhalb der Siedetemperatur von flüssigem Stickstoff bezeichnet. Induktionsheizer sind in der Regel in eine Ferti- gungslinie integriert. Deshalb muss der Induktionsheizer innerhalb eines durch die Fertigungslinie vorgegebenen Zeittaktes ein erhitztes Billet bereitstellen.An induction heater is known from DE 10 2005 061 670.4. To heat a billet of an electrically conductive material, the billet is rotated in a shaft between two legs of a cross-sectionally C-shaped yoke. A DC-powered, high-temperature superconducting coil sits on the yoke. As high-temperature superconducting (HTSL) cuprates superconductors are e.g. YBCO and more generally all superconductors (SL) with a SL transition temperature above the boiling point of liquid nitrogen. Induction heaters are usually integrated into a production line. Therefore, the induction heater must provide a heated billet within a timed cycle given by the production line.
Aus der US 5 412 183 A ist ein Induktionsheizer mit einem näherungsweise E-förmigen Joch bekannt, dessen drei Schenkel als Polschuhe ausgebildet und sternförmig um jeweils 120 Grad versetzt angeordnet sind, um in dem Raum zwischen den Polschuhen ein Werkstück durch auf den Polschuhen sitzende, wechselstromgespeiste Spulenanordnungen induktiv zu erwärmen .From US Pat. No. 5,412,183 A, an induction heater with an approximately E-shaped yoke is known, whose three limbs are designed as pole shoes and staggered by 120 degrees in each case in order to move a workpiece in the space between the pole shoes through the pole shoes. AC-powered coil assemblies to heat inductively.
Aus der FR 904 159 A ist ein weiterer Induktionsheizer mit einem E-förmigen Joch bekannt, auf dessen Mittelschenkel eine erste Spulenanordnung sitzt und dessen Endschenkel auf- einander zugerichtet sind. Das zu erwärmende Werkstück befindet sich zwischen den von einander beabstandeten Stirnflächen der Endschenkel des Jochs und ist von einer weiteren Spulenanordnung umgeben, die wechselstromgespeist ist und primär die Leistung zur induktiven Erwärmung des Werkstücks liefert.From FR 904 159 A, a further induction heater with an E-shaped yoke is known, on the center leg of which a first coil arrangement is seated and whose end legs are aligned with one another. The workpiece to be heated is located between the spaced end faces the yoke of the yoke and is surrounded by a further coil assembly which is AC powered and primarily provides the power for inductive heating of the workpiece.
Aus der EP 266 470 Al ist ein weiterer Induktionsheizer mit einem E-förmigen Joch bekannt, dessen drei Schenkel je eine wechselstromgespeiste Spulenanordnung tragen um das in dem freien Raum zwischen den Schenkeln befindliche Werkstück induktiv zu erwärmen.From EP 266 470 Al a further induction heater with an E-shaped yoke is known, the three legs each carry an AC-powered coil assembly to inductively heat the workpiece located in the free space between the legs.
Der Erfindung liegt die Aufgabe zugrunde, einen Induktionsheizer für einen pro Zeiteinheit erhöhten Billetausstoß und bei niedrigem Energieverbrauch bereitzustellen.The invention has for its object to provide an induction heater for a per unit time increased billet output and low energy consumption.
Diese Aufgabe ist durch einen Induktionsheizer mit denThis task is through an induction heater with the
Merkmalen nach dem Anspruch 1 und durch ein Verfahren mit den Schritten des Anspruchs 22 gelöst. Die abhängigen Ansprüche sind auf bevorzugte Ausführungsformengerichtet .Characteristics according to claim 1 and solved by a method with the steps of claim 22. The dependent claims are directed to preferred embodiments.
Der Induktionsheizer nach dem Anspruch 1 hat ein im Querschnitt zumindest näherungsweise E-förmiges Joch aus einem Mittelschenkel zwischen zwei Außenschenkeln, wobei der Mittelschenkel und die beiden Außenschenkel durch einen Querschenkel verbunden sind. Mindestens eine supraleitende Spule sitzt auf einem der genannten Schenkel. Zwischen den beiden Außenschenkeln und dem Mittelschenkel ist jeweils ein Schacht, in dem ein Billet durch Drehen in dem Schacht erwärmt werden kann. Weil der Induktionsheizer zwei Schächte hat, können zwei Billets gleichzeitig erwärmt werden. Bei- spielsweise kann beim Wechsel eines erwärmten Billets gegen ein neues, kaltes Billet ein weiteres Billet in dem anderen Schacht erwärmt werden. Entsprechend erhöht sich der Ausstoß des Induktionsheizers. Die E-Form des Jochs ermöglicht es, mit nur einer supraleitenden Spule den Ausstoß an erwärmten Billets deutlich zu erhöhen. Üblicherweise ist die Spule Teil einer Spulenanordnung, die in der Regel zumindest noch die Anschlüsse für die Spule umfasst.The induction heater according to claim 1 has a cross-sectionally at least approximately E-shaped yoke of a middle leg between two outer legs, wherein the center leg and the two outer legs are connected by a transverse leg. At least one superconducting coil sits on one of the legs. Between the two outer legs and the middle leg is in each case a shaft in which a billet can be heated by turning in the shaft. Because the induction heater has two shafts, two billets can be heated at the same time. For example, when changing a heated billet against a new, cold billet another billet can be heated in the other shaft. Accordingly, the output of the induction heater increases. The E-shape of the yoke makes it possible to significantly increase the output of heated billets with just one superconducting coil. Usually, the coil is part a coil arrangement, which usually comprises at least the terminals for the coil.
Beispielsweise kann die Spule bzw. die Spulenanordnung auf dem Mittelschenkel sitzen. Alternativ können auch z.B. zwei Spulen bzw. Spulenanordnungen auf dem Querschenkel, bevorzugt beiderseits des Mittelschenkels je eine Spule bzw. Spulenanordnung, sitzen. Natürlich kann auch auf den Außenschenkeln je eine Spule sitzen.For example, the coil or the coil arrangement can sit on the middle leg. Alternatively, e.g. two coils or coil arrangements on the transverse leg, preferably on both sides of the center leg each have a coil or coil arrangement sitting. Of course, can also sit on the outer thighs ever a coil.
Die nachfolgend beschriebenen Weiterbildungen der Erfindung sind nicht an die E-Form des Jochs, insbesondere nicht an die Anzahl der Schächte gebunden.The further developments of the invention described below are not bound to the E-shape of the yoke, in particular not to the number of shafts.
Die beiden Außenschenkel und der Mittelschenkel des Jochs sind durch einen Querschenkel verbunden. Bevorzugt ist die Spulenanordnung bzw. die Spule bis zum Anschlag an den Querschenkel auf den Mittelschenkel aufgeschoben. Dies ermöglicht ein kompaktes Joch mit einem entsprechend kurzen magnetischen Rückschluss, wodurch der Wirkungsgrad des Induktionsheizers verbessert wird.The two outer legs and the middle leg of the yoke are connected by a transverse leg. Preferably, the coil assembly or the coil is pushed to the stop on the transverse leg on the center leg. This allows a compact yoke with a correspondingly short magnetic return, whereby the efficiency of the induction heater is improved.
Bevorzugt sind die Schenkel des Jochs aus Vollmaterial. Weil die Spule gleichstromgespeist ist, kann auf den teure- ren Aufbau eines Jochs aus geschichtetem Blechen verzichtet werden ohne durch Wirbelströme verursachte Wirbelstromverluste in dem Joch in Kauf nehmen zu müssen. Durch die fehlende Laminierung, die auch eine elektrische Isolation beinhaltet, wird der magnetische Füllfaktor gegenüber einer geblechten Variante erhöht. Dies erlaubt entweder eine Steigerung des Magnetfeldes oder eine kostengünstigere Konstruktion durch Verwendung einfacherer Materialien bei gleicher magnetischer Feldstärke. Die Spulenanordnung hat bevorzugt eine evakuierte Kammer, in der mindestens eine HTSL-Spule ist. Die evakuierte Kammer ermöglicht eine gute Wärmeisolierung der HTSL-Spule.Preferably, the legs of the yoke made of solid material. Because the coil is DC-powered, it is possible to dispense with the more expensive construction of a yoke made of layered metal sheets without having to accept eddy-current losses in the yoke caused by eddy currents. Due to the lack of lamination, which also includes electrical insulation, the magnetic fill factor is increased compared to a lathed variant. This allows either an increase in the magnetic field or a more cost-effective design by using simpler materials at the same magnetic field strength. The coil assembly preferably has an evacuated chamber in which there is at least one HTS coil. The evacuated chamber allows good thermal insulation of the HTS coil.
Weiter verbessert wird die Wärmeisolierung, wenn die HTSL- Spule in mehrere Lagen einer metallbeschichteten, vorzugsweise in eine aluminiumbedampfte Folie eingehüllt ist.The heat insulation is further improved if the HTS coil is encased in several layers of a metal-coated, preferably aluminum-coated foil.
Die HTSL-Spule kann mittels Kunststofflagern in der Kammer gehaltert sein.The HTS coil can be held in the chamber by means of plastic bearings.
Eine Wärmeisolierung zwischen der Spulenanordnung und den offenen Enden der Schächte reduziert die notwendige Kühlleistung für die HTSL-Spule. Besonders geeignet sind mikro- poröse Wärmeisolierungen. Ein geeigneter Werkstoff für die Wärmeisolierung ist insbesondere Calziumsilikat .Thermal insulation between the coil assembly and the open ends of the wells reduces the necessary cooling power for the HTSC coil. Particularly suitable are microporous thermal insulation. A suitable material for thermal insulation is especially calcium silicate.
Zusätzlich oder alternativ zu der Wärmeisolierung kann ein in Richtung des Billets reflektierender Infrarotreflektor beispielsweise aus einer goldbedampften Keramik in den Schächten sein. Dadurch werden Wärmeverluste reduziert. Besonders geeignet ist ein im Querschnitt U-förmiger Infrarotreflektor, in dessen freier Mitte das Billet gedreht wird.In addition or as an alternative to the thermal insulation, an infrared reflector reflecting in the direction of the billet can be, for example, a gold-coated ceramic in the ducts. This reduces heat losses. Particularly suitable is a cross-sectionally U-shaped infrared reflector, in the free center of the billet is rotated.
Bevorzugt ist vor der Spulenanordnung in jedem Schacht eine Prallschutzplatte mit einem im Vergleich zum Joch hohen magnetischen Widerstand, z.B. aus Edelstahl (V2A, V4A etc.). Sollte sich ein rotierendes Billet aus seiner Halte- rung lösen, dann verhindert die Prallschutzplatte eine Beschädigung der teureren und empfindlichen supraleitenden Spulenanordnung. Die Prallschutzplatten können beispielsweise jeweils in zwei einander gegenüberliegenden Längsnuten in dem entsprechenden Schacht sitzen. Bevorzugt sind die Schächte in Richtung der freien Enden der Schenkel verjüngt, d.h. die Schenkel sind entsprechend verdickt. Dadurch wird der Luftspalt zwischen den freien Enden der Schenkel, in welchen die Billets gedreht werden, verkürzt. Entsprechend wird der magnetische Widerstand verringert und die maximale Heizleistung und der Wirkungsgrad erhöht .Preference is given to the coil arrangement in each slot an impact protection plate with a high compared to the yoke magnetic resistance, for example made of stainless steel (V2A, V4A, etc.). Should a rotating billet come loose from its mount, then the baffle plate prevents damage to the more expensive and delicate superconducting coil assembly. The impact protection plates can, for example, each sit in two opposing longitudinal grooves in the corresponding shaft. Preferably, the shafts are tapered in the direction of the free ends of the legs, ie, the legs are thickened accordingly. This shortens the air gap between the free ends of the legs in which the billets are rotated. Accordingly, the magnetic resistance is reduced, and the maximum heating power and the efficiency are increased.
Die Schächte können gegenüber der Umgebung durch eine Wär- meisolation verschlossen sein. Zum Aus- und Einbringen der Billets in die Schächte sind die die Schächte verschließenden Wärmeisolationen vorzugsweise beweglich.The manholes can be closed off from the environment by means of heat insulation. For removing and inserting the billets into the shafts, the shafts closing thermal insulation are preferably movable.
Zusätzlich oder optional können die Schächte gegenüber der Umgebung durch nichtmagnetische Schutzplatten abgedeckt sein. Diese Schutzplatten verhindern, dass ein rotierendes Billet, welches sich aus seiner Einspannvorrichtung gelöst hat, den Schacht verlässt und andere Maschinenteile oder sogar Personen beschädigt bzw. verletzt. Selbstverständlich sind auch die Schutzplatten zum Öffnen der Schächte bevorzugt beweglich.Additionally or optionally, the wells may be covered from the environment by non-magnetic protection plates. These guard plates prevent a rotating billet that has detached from its jig from leaving the shaft and damaging or injuring other machine parts or even persons. Of course, the protective plates for opening the shafts are preferably movable.
Bevorzugt ist die Breite der Schächte einstellbar. Dadurch lassen sich die Schächte an unterschiedliche Billetdurch- messer anpassen. Dies kann beispielsweise durch Verschieben oder Schwenken zumindest eines unteren Teils der Außenschenkel erfolgen. Der untere Teil der Außenschenkel kann auch in einer Ebene orthogonal zur Drehachse segmentiert sein. Zur Feldanpassung in dem jeweiligen Schacht können die Segmente unabhängig voneinander verschoben oder geschwenkt werden. Alternativ oder optional kann die Breite der Schächte durch an den Schenkeln des Jochs auswechselbar befestigte ferromagnetische Metallplatten eingestellt werden. Solche Metallplatten können eine größere relative magnetische Permeabilität als das Joch haben. Dies führt zu einer Konzentration des magnetischen Flusses durch die Metallplatten und damit auch durch das zwischen den Metallplatten gedrehte Billet. Wenn besonders große Billets erwärmt werden sollen, können die Metallplatten auch eine geringere relative Permeabilität als das Joch haben, dann wirken die Metallplatten streuend, entsprechend wirkt der magnetische Fluss gleichmäßiger.Preferably, the width of the shafts is adjustable. This allows the chutes to be adapted to different billet diameters. This can be done for example by moving or pivoting at least a lower part of the outer leg. The lower part of the outer legs can also be segmented in a plane orthogonal to the axis of rotation. For field adaptation in the respective shaft, the segments can be moved or swiveled independently of each other. Alternatively or optionally, the width of the shafts can be adjusted by interchangeably fixed to the legs of the yoke ferromagnetic metal plates. Such metal plates may have a larger relative magnetic permeability than the yoke. This leads to a concentration of the magnetic flux through the metal plates and thus also through the billet rotated between the metal plates. If particularly large billets are to be heated, the metal plates may also have a lower relative permeability than the yoke, then the metal plates will act as a scatter, accordingly the magnetic flux will be more uniform.
Die Breite der Schächte kann von den Stirnseiten des Jochs zur Mitte hin zunehmen. Dazu können ferromagnetische Metallkeile auswechselbar an den Schenkeln des Jochs befestigt sein. Diese Geometrie der Schächte reduziert die an den Stirnseiten des Joches aus den Schächten austretenden Streufelder, entsprechend wird der magnetische Fluss durch die Billets erhöht.The width of the shafts may increase from the end faces of the yoke towards the middle. These ferromagnetic metal wedges can be exchangeably attached to the legs of the yoke. This geometry of the shafts reduces the stray fields emerging from the shafts at the ends of the yoke, and accordingly the magnetic flux is increased by the billets.
Zum Verstellen der Breite der Schächte, sei es durch Ver- schieben oder Verschwenken von Teilen der Außenschenkel oder auch durch Austauschen auswechselbar befestigter Metallplatten oder Keile wird bevorzugt zunächst die HTSL Spule abgeschaltet. Anschließend kann dann die Breite der Schächte einfach verändert werden. Besonders einfach lässt sich die Breite der Schächte verändern, wenn nach dem Abschalten der Spule und vor dem Verändern der Breite das Joch entmagnetisiert wird. Dazu kann beispielsweise eine auf dem Joch sitzenden Spulenanordnung, insbesondere die supraleitende Spulenanordnung mit Wechselstrom gespeist werden. Die Stromstärke der Wechselstromspeisung ist geringer als die Nennstromstärke bei Gleichstromspeisung. Vorzugsweise beträgt sie etwa 10 % bis 20 % des Nennstroms bei Gleichstromspeisung . In der Zeichnung ist schematisch vereinfacht ein Induktionsheizer nach der Erfindung beispielhaft dargestellt. Es zeigt:To adjust the width of the shafts, be it by shifting or pivoting parts of the outer legs or by exchanging interchangeably fixed metal plates or wedges, the HTS coil is preferably first switched off. Then then the width of the shafts can be easily changed. The width of the shafts can be changed particularly easily if the yoke is demagnetized after switching off the coil and before changing the width. For this example, a seated on the yoke coil assembly, in particular the superconducting coil assembly can be fed with alternating current. The amperage of the AC supply is less than the rated current with DC supply. Preferably, it is about 10% to 20% of the rated current for DC power. In the drawing, schematically simplified, an induction heater according to the invention is shown by way of example. It shows:
Fig. 1 eine teilgeschnittene Seitenansicht eines Induktionsheizers ,1 is a partially sectioned side view of an induction heater,
Fig. 2 einen Querschnitt der Magneteinheit des Induktionsheizers aus Fig. 1,2 shows a cross section of the magnet unit of the induction heater of FIG. 1,
Fig. 3 eine Seitenansicht der Magneteinheit des Induktionsheizers aus Fig. 1,3 is a side view of the magnet unit of the induction heater of FIG. 1,
Fig. 4 einen Längsschnitt (B/B aus Fig. 3) des Indukti- onsheizers,4 shows a longitudinal section (B / B from FIG. 3) of the induction heater,
Fig. 5 eine weitere Magneteinheit eines Induktionsheizers,5 shows another magnet unit of an induction heater,
Fig. 6 eine schematische Ansicht einer weiteren Magneteinheit von unten, undFig. 6 is a schematic view of another magnet unit from below, and
Fig. 7 bisFig. 7 to
Fig. 10 je einen Schnitt durch einen Induktionsheizer.Fig. 10 each have a section through an induction heater.
Der Induktionsheizer in Fig. 1 hat eine zweiteilige Einspannvorrichtung 2a, 2b, die ein Billet 10 in einem Schacht einer Magneteinheit 100 haltert. Das Billet 10 ist über einen Teil der Einspannvorrichtung 2a, ein Getriebe 3 und ei- nen Motor 1 drehangetrieben. Mittels der Einspannvorrichtung 2a, 2b kann das Billet 10 wie durch den entsprechenden Doppelpfeil angedeutet angehoben und abgesenkt werden. Zusätzlich können die Einspannvorrichtungen 2a, 2b auch horizontal verfahrbar sein. Auch dies ist durch Doppelpfeile angedeutet. Das Billet 10 ist in einem Schacht 151 1 eines im Querschnitt E-förmigen Jochs 140, auf dessen Mittelschenkel eine Spulenanordnung 120 sitzt (vgl. Fig. 2 bis Fig. 4). Das Joch 140 ist im Querschnitt E-förmig und hat zwei Außen- Schenkel 142 1, 142 r die über einen Querschenkel 141 mit einem MittelSchenkel 143 verbunden sind. Entsprechend ist zwischen dem Außenschenkel 142 1 und dem Mittelschenkel 143 ein nach unten offener Schacht 150 1 und zwischen dem Außenschenkel 142 r und dem Mittelschenkel 143 ein weiterer ebenfalls nach unten offener Schacht 150 r. Das Joch 140 ist aus einem Vollmaterial hergestellt.The induction heater in Fig. 1 has a two-piece jig 2a, 2b, which holds a billet 10 in a shaft of a magnet unit 100. The billet 10 is rotationally driven via a part of the clamping device 2 a, a gear 3 and a motor 1. By means of the clamping device 2a, 2b, the billet 10 can be raised and lowered as indicated by the corresponding double arrow. In addition, the clamping devices 2a, 2b can also be moved horizontally. This is also indicated by double arrows. The billet 10 is in a slot 151 1 of a cross-sectionally E-shaped yoke 140, on the center leg of a coil assembly 120 is seated (see Fig .. 2 to Fig. 4). The yoke 140 is E-shaped in cross-section and has two outer legs 142 1, 142 r which are connected via a transverse leg 141 with a MittelSchenkel 143. Accordingly, between the outer leg 142 1 and the middle leg 143, a downwardly open slot 150 1 and between the outer leg 142 r and the middle leg 143 another likewise downwardly open slot 150 r. The yoke 140 is made of a solid material.
Die Spulenanordnung 120 besteht aus einer evakuierten Kammer 125 in der eine z.B. mit flüssigem Stickstoff gekühlte HTSL-Spule 121 ist (Kühlung und elektrische Zuleitungen nicht dargestellt) . Die HTSL-Spule 122 ist mit einer nicht dargestellten Kunststoffhalterung in der Kammer 125 festgelegt. Die HTSL-Spule 121 ist in einem Gehäuse 122, welches von mehreren Lagen einer AL-bedampften Polyesterfolie als Wärmeisolation umhüllt ist. Eine gute Wärmeisolation erreicht man mit ca. 40 bis 60 Lagen der Folie, wobei an den Kanten vorzugsweise 10 bis 20 weitere Lagen sind.The coil assembly 120 consists of an evacuated chamber 125 in which e.g. liquid nitrogen cooled HTSC coil 121 (cooling and electrical leads not shown). The HTS coil 122 is fixed in the chamber 125 with a plastic retainer, not shown. The HTSC coil 121 is housed in a case 122 which is enveloped by a plurality of layers of an AL evaporated polyester film as heat insulation. A good heat insulation can be achieved with about 40 to 60 layers of the film, wherein at the edges preferably 10 to 20 further layers.
Unterhalb der Kammer 125 ist in jedem Schacht 150 1, 150 r eine Prallschutzplatte 153. Die Prallschutzplatten 153 sind aus einem nicht magnetischen Material, z.B. Edelstahl, und sitzen in einander gegenüberliegenden Längsnuten 152 in ihrem Schacht 150 1 bzw. 150 r. Zur Montage werden die Prallschutzplatten 153 von einer der Stirnseiten des Joches in die Längsnuten 152 eingeschoben und dann befestigt. DieBelow the chamber 125, in each well 150 1, 150 r is an impact protection plate 153. The impact protection plates 153 are made of a non-magnetic material, e.g. Stainless steel, and sitting in opposing longitudinal grooves 152 in its slot 150 1 and 150 r. For mounting the impact protection plates 153 are inserted from one of the end sides of the yoke in the longitudinal grooves 152 and then secured. The
Prallschutzplatten 153 schützen die Spulenanordnung 120 vor Beschädigungen durch ein rotierendes Billet 10, welches sich aus der Einspannvorrichtung 2a, 2b gelöst hat.Impact protection plates 153 protect the coil assembly 120 from damage by a rotating billet 10, which has become detached from the clamping device 2a, 2b.
Nach unten schließt sich an die Prallschutzplatte 153 unmittelbar eine Wärmeisolierung 154, hier aus Calziumsilikat- platten, an. Die Wärmeisolierung 154 schützt, ebenso wie der sich daran anschließende im Querschnitt U-förmigen Infrarotreflektor 158 aus goldbedampfter Keramik, die Spulenanordnung 120 und das Joch 140 vor der Wärme der Billets 10. Zu- dem sind die Verluste durch Wärmeabgabe des Billets an das Joch geringer.Downwardly, a heat insulation 154, here made of calcium silicate, immediately adjoins the impact protection plate 153. plates, on. The thermal insulation 154, as well as the subsequent cross-sectionally U-shaped infrared reflector 158 of gold-fired ceramic, the coil assembly 120 and the yoke 140 protects against the heat of the billets 10. In addition, the losses are lower by heat release of the billet to the yoke ,
Die Schächte 150 1, 150 r sind an ihren unteren Enden durch auswechselbar an den Außenschenkeln 142 1, 142 r bzw. an dem Mittelschenkel 143 befestigte ferromagnetische Platten 155, verjüngt. Dadurch wird der Luftspalt zwischen den Schenkeln 142 1, 142 r und 143 des Jochs 140 und den Billets 10 verkürzt und entsprechend der magnetische Widerstand der Magneteinheit 100 verringert. Die Platten 155 haben eine größe- re magnetische Permeabilität als das Joch 140. Deshalb konzentrieren die Platten 155 den magnetischen Fluss durch die Billets 10. Im Vergleich zu einer Ausführung, bei der die Schächte eine konstante, dem Abstand zwischen den Platten 155 geringe Breite haben, hat die hier gezeigte Ausführungs- form den Vorteil, dass die Schächte 1501, 15Or nach oben effektiv verbreitert sind, wodurch die evakuierte Kammer 125 entsprechend größer ausfällt und die Isolation der HTSL- Spule 121 verbessert ist. Die auswechselbare Befestigung der Platten 155 ermöglicht eine einfache Montage der Magnetein- heit 100 sowie eine Anpassung der Breite der Schächte 1501, 15Or an den Durchmesser der zu erwärmenden Billets 10.The shafts 150 1, 150 r are at their lower ends by interchangeable attached to the outer legs 142 1, 142 r and the middle leg 143 attached ferromagnetic plates 155, tapered. As a result, the air gap between the legs 142 1, 142 r and 143 of the yoke 140 and the billets 10 is shortened and, correspondingly, the magnetic resistance of the magnet unit 100 is reduced. The plates 155 have a larger magnetic permeability than the yoke 140. Therefore, the plates 155 concentrate the magnetic flux through the billets 10. Compared to an embodiment in which the wells have a constant, the distance between the plates 155 narrow width , the embodiment shown here has the advantage that the shafts 1501, 15Or are effectively widened upwards, whereby the evacuated chamber 125 correspondingly larger fails and the insulation of the HTSC coil 121 is improved. The replaceable attachment of the plates 155 allows easy mounting of the magnet unit 100 as well as an adaptation of the width of the shafts 1501, 15Or to the diameter of the billets 10 to be heated.
Nach unten sind die Schächte 150 1, 150 r durch eine weitere Wärmeisolierung 156 verschlossen. Die Wärmeisolierung 165 liegt in einem Kanal aus drei Schutzplatten 157. DieDown the shafts 150 1, 150 r are closed by a further heat insulation 156. The thermal insulation 165 is located in a channel of three protective plates 157th Die
Schutzplatten 157 sind aus einem nicht magnetischen Material, z.B. Edelstahl, und dienen der Unfallvermeidung. Sollte sich ein Billet 10 während des Erwärmens unvorhergesehen aus der Einspannvorrichtung 2a, 2b lösen, so kann es den entsprechenden Schacht 150 1, 150 r nicht verlassen, d.h. weder andere Anlagenteile beschädigen noch Personen verlet- zen. Die Wärmeisolierung 156 und die Schutzplatten 157 sind, durch Doppelpfeile angedeutet, heb- und senkbar. Dadurch können die Schächte 150 1, 150 r geöffnet werden, um ein Billet 100 von unten in den entsprechenden Schacht ein- zubringen.Protective plates 157 are made of a non-magnetic material, such as stainless steel, and serve accident prevention. Should a billet 10 unintentionally detach from the clamping device 2a, 2b during the heating, it can not leave the corresponding shaft 150 1, 150 r, that is to say damage neither other parts of the system nor does it injure persons. Zen. The thermal insulation 156 and the protective plates 157 are indicated by double arrows, raised and lowered. As a result, the shafts 150 1, 150 r can be opened in order to insert a billet 100 from below into the corresponding shaft.
Die Ausführungsform in Fig. 5 entspricht im Wesentlichen der Ausführungsform in Fig. 1 bis 4 (gleiche oder ähnliche Teile sind mit identischen Bezugszeichen gekennzeichnet) , jedoch sind die unteren Teilstücke der beiden Außenschenkel 142 1 und 142 r verschiebbar, um die Breite der Schächte 150 1, 150 r an Billets 10 mit unterschiedlichen Durchmessern anzupassen. Der verschiebbare Teil der beiden Außenschenkel 142 1, 142 r ist in zwei Positionen dargestellt, wobei die Offenstellung durch eine entgegen der ansonsten für das Joch 140 verwendeten Schraffur gerichtete Schraffur angedeutet ist.The embodiment in Fig. 5 corresponds substantially to the embodiment in Figs. 1 to 4 (same or similar parts are denoted by identical reference numerals), but the lower portions of the two outer legs 142 1 and 142 r are slidable to the width of the wells 150th 1, 150 r to billets 10 with different diameters to adapt. The displaceable part of the two outer legs 142 1, 142 r is shown in two positions, wherein the open position is indicated by a hatching directed against the otherwise used for the yoke 140 otherwise hatching.
Zur Anpassung der Wärmeisolierung 154 und der Infrarotref- lektoren 154 an eine veränderte Schachtbreite können diese entweder komplett ausgetauscht werden oder in der Breite teleskopartig verstellbar sein (nicht dargestellt) .To adapt the thermal insulation 154 and the infrared reflectors 154 to a modified shaft width, these can either be completely replaced or be telescopically adjustable in width (not shown).
Die Magneteinheit 100 in Fig. 6 ist im Wesentlichen ähnlich zu den Induktionsheizern der anderen Figuren. Anstelle der Platten 153 in Fig. 2 und Fig. 5 sind Metallkeile 155 b an den Außenschenkeln 142 1, 142 r und beidseitig des Mittelschenkels 143 auswechselbar und gegeneinander verschiebbar befestigt. Dadurch nimmt die Breite der Schächte 150 1, 150 r von den Stirnseiten zur Mitte hin zu. Dies reduziert stirnseitig austretende Streufelder und ermöglicht eine Feldanpassung zur Ausbildung eines Feldprofiles. Durch Verschieben der Metallkeile 155 b parallel zur Drehachse kann so z.B. auf unterschiedliche Materialien oder Geometrien eingestellt werden. Entsprechend ist der Wirkungsgrad der Magneteinheit 100 verbessert. Die Induktionsheizer 100 in den Figuren 7 bis 10 sind zu dem Induktionsheizer 100 in den Fig. 1 bis 4 ähnlich. Deshalb werden für gleiche oder ähnliche Teile identische Be- zugszeichen verwendet und es wird lediglich auf die Unterschiede eingegangen.The magnet unit 100 in Fig. 6 is substantially similar to the induction heaters of the other figures. Instead of the plates 153 in Fig. 2 and Fig. 5 are metal wedges 155 b on the outer legs 142 1, 142 r and on both sides of the center leg 143 interchangeable and against each other slidably mounted. As a result, the width of the shafts 150 1, 150 r increases from the end faces toward the center. This reduces stray fields emerging from the front and enables field adaptation to form a field profile. By moving the metal wedges 155 b parallel to the axis of rotation, for example, it is possible to set to different materials or geometries. Accordingly, the efficiency of the magnet unit 100 is improved. The induction heaters 100 in FIGS. 7 to 10 are similar to the induction heater 100 in FIGS. 1 to 4. Therefore, identical reference numerals are used for the same or similar parts and only the differences are discussed.
Der Induktionsheizer 100 in Fig. 7 hat anstelle einer Spulenanordnung auf dem Mittelschenkel 143 wie in Fig. 1 bis 4 gezeigt eine Spulenanordnung 120 auf dem rechten Außenschenkel 142 r und eine Spulenanordnung 120 auf dem linken Außenschenkel 142 1.The induction heater 100 in FIG. 7 has, instead of a coil arrangement on the center leg 143 as shown in FIGS. 1 to 4, a coil arrangement 120 on the right outer leg 142 r and a coil arrangement 120 on the left outer leg 142 1.
Der Induktionsheizer 100 in Fig. 8 hat lediglich eine Spu- lenanordnung, die auf dem linken Außenschenkel 142 1 sitzt und auf diesen bis zum Anschlag an den Querschenkel 141 aufgeschoben ist.The induction heater 100 in FIG. 8 has only one coil arrangement which sits on the left outer leg 142 1 and is pushed onto the latter on the transverse leg 141 up to the stop.
Die Fig. 9 zeigt einen Induktionsheizer 100 mit einer Spu- lenanordnung 120, die zwischen dem linken Außenschenkel 142 1 und dem Mittelschenkel 143 auf dem Querschenkel 141 sitzt. Zur Montage einer vormontierten Spulenanordnung 120 ist der linke Außenschenkel 142 1, anders als dargestellt, demontierbar .FIG. 9 shows an induction heater 100 with a coil arrangement 120 which sits between the left outer leg 142 1 and the middle leg 143 on the transverse leg 141. For mounting a preassembled coil assembly 120, the left outer leg 142 1, unlike shown, disassembled.
Fig. 10 zeigt einen Induktionsheizer 100 mit je einer Spulenanordnung 120 beidseits des Mittelschenkels 143, die auf dem Querschenkel 141 sitzt. Zur Montage einer vormontierten Spulenanordnung 120 sind die beiden Außenschenkel 142 1, 142 r, anders als gezeigt, demontierbar. FIG. 10 shows an induction heater 100, each having a coil arrangement 120 on both sides of the center leg 143, which sits on the transverse limb 141. For mounting a preassembled coil assembly 120, the two outer legs 142 1, 142 r, other than shown, disassembled.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Induktionsheizer mit mindestens einer gleichstromgespeisten supraleitenden Spule (121) auf einem Joch (140) zum Erwärmen von Billets, dadurch gekennzeichnet, dass dasAn induction heater having at least one DC powered superconducting coil (121) on a yoke (140) for heating billets, characterized in that the
Joch (140) an einem gemeinsamen Querschenkel (141) einen Mittelschenkel (143) zwischen zwei Außenschenkeln (142 1, 142 r) hat, und dass zwischen dem Mittelschenkel (143) und den beiden Außenschenkeln (1421, 142r) je einen Schacht (1501, 15Or) zur Aufnahme jeweils eines der zu erwärmenden Billets hat.Yoke (140) at a common transverse limb (141) has a middle leg (143) between two outer limbs (142 1, 142 r), and that between the middle limb (143) and the two outer limbs (1421, 142r) each have a shaft (1501 , 15Or) for receiving one of the billets to be heated.
2. Induktionsheizer nach Anspruch 1, dadurch gekennzeichnet, dass die Spule (121) bis zum Anschlag an den Querschenkel (141) auf den Mittelschenkel (143) des Jochs aufgeschoben ist.2. Induction heater according to claim 1, characterized in that the coil (121) is pushed to the stop on the transverse limb (141) on the center leg (143) of the yoke.
3. Induktionsheizer nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass zumindest ein Schenkel (141, 142 1, 142 r, 143) des Jochs (140) aus Vollmaterial ist.3. induction heater according to one of claims 1 or 2, characterized in that at least one leg (141, 142 1, 142 r, 143) of the yoke (140) is made of solid material.
4. Induktionsheizer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Spule eine HTSL-Spule (121) in einer evakuierten Kammer (125) einer Spulenanordnung (120) ist.4. induction heater according to one of claims 1 to 3, characterized in that the coil is a HTSC coil (121) in an evacuated chamber (125) of a coil assembly (120).
5. Induktionsheizer nach Anspruch 4, dadurch gekennzeichnet, dass die Spule (121) mittels Kunststofflager in der Kammer (125) gehaltert ist.5. induction heater according to claim 4, characterized in that the coil (121) by means of plastic bearings in the chamber (125) is supported.
6. Induktionsheizer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Spule (121) mit mehreren Lagen einer metall-bedampften Folie (123) umhüllt ist. 6. induction heater according to one of claims 1 to 5, characterized in that the coil (121) with several layers of a metal-coated foil (123) is enveloped.
7. Induktionsheizer nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine Wärmeisolierung (154) zwischen der Spule (121) und den offenen Enden der Schächte (150 1, 150 r) .7. Induction heater according to one of claims 1 to 6, characterized by a thermal insulation (154) between the coil (121) and the open ends of the shafts (150 1, 150 r).
8. Induktionsheizer nach Anspruch 7, dadurch gekennzeichnet, dass die Wärmeisolierung (154) mikroporös ist.8. induction heater according to claim 7, characterized in that the thermal insulation (154) is microporous.
9. Induktionsheizer nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Wärmeisolierung (154) aus Calziumsilikat ist.9. Induction heater according to claim 7 or 8, characterized in that the thermal insulation (154) is made of calcium silicate.
10. Induktionsheizer nach einem der Ansprüche 1 bis 9, gekennzeichnet durch einen Infrarotreflektor (158) vorzugsweise aus einer goldbedampften Keramik in jeder der beiden Schächte .10. Induction heater according to one of claims 1 to 9, characterized by an infrared reflector (158), preferably made of a gold-coated ceramic in each of the two shafts.
11. Induktionsheizer nach Anspruch 10, dadurch gekennzeichnet, dass die Infrarotreflektoren (158) im Querschnitt U-förmig sind.11. Induction heater according to claim 10, characterized in that the infrared reflectors (158) are U-shaped in cross section.
12. Induktionsheizer nach einem der Ansprüche 1 bis 11, gekennzeichnet durch eine nichtmagnetische Prallschutzplatte in jedem Schacht (150 1, 150 r) .12. Induction heater according to one of claims 1 to 11, characterized by a non-magnetic impact protection plate in each slot (150 1, 150 r).
13. Induktionsheizer nach Anspruch 12, dadurch gekennzeichnet, dass jeder Schacht (150 1, 150 r) zwei einander gegenüberliegende Längsnuten (152) hat, in denen eine der Prallschutzplatten (153) sitzt.13. Induction heater according to claim 12, characterized in that each shaft (150 1, 150 r) has two mutually opposite longitudinal grooves (152) in which one of the impact protection plates (153) sits.
14. Induktionsheizer nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Schächte (150 1, 150 r) in Richtung der freien Enden der freien Schenkel (142 1, 142 r, 143) verjüngt sind.14. Induction heater according to one of claims 1 to 13, characterized in that the shafts (150 1, 150 r) in the direction of the free ends of the free legs (142 1, 142 r, 143) are tapered.
15. Induktionsheizer nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Schächte (150 1, 150 r) gegenüber der Umgebung durch eine Wärmeisolation (156) verschlossen sind.15. Induction heater according to one of claims 1 to 14, characterized in that the shafts (150 1, 150 r) opposite the environment by a heat insulation (156) are closed.
16. Induktionsheizer nach Anspruch 15, dadurch gekennzeichnet dass die die Schächte (150 1, 150 r) verschließende Wärmeisolation zum Öffnen der Schächte (150 1, 150 r) beweglich ist.16. Induction heater according to claim 15, characterized in that the shafts (150 1, 150 r) occlusive heat insulation for opening the shafts (150 1, 150 r) is movable.
17. Induktionsheizer nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Schächte (150 1, 150 r) gegenüber der Umgebung durch nichtmagnetische Schutzplatten (157) abgedeckt sind.17. Induction heater according to one of claims 1 to 16, characterized in that the shafts (150 1, 150 r) from the environment by non-magnetic protection plates (157) are covered.
18. Induktionsheizer nach Anspruch 17, dadurch gekennzeichnet, dass die Schutzplatten (157) zum Öffnen der Schächte18. Induction heater according to claim 17, characterized in that the protective plates (157) for opening the shafts
(150 1, 150 r) beweglich sind.(150 1, 150 r) are movable.
19. Induktionsheizer nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass die Breite der Schächte (150 1, 150 r) einstellbar ist.19. Induction heater according to one of claims 1 to 18, characterized in that the width of the shafts (150 1, 150 r) is adjustable.
20. Induktionsheizer nach Anspruch 19, dadurch gekennzeichnet, dass die Breite der Schächte (150 1, 150 r) durch Verschieben oder Schwenken zumindest von Teilen der Außenschenkel (142 1, 142 r) einstellbar ist.20. Induction heater according to claim 19, characterized in that the width of the shafts (150 1, 150 r) by moving or pivoting at least parts of the outer legs (142 1, 142 r) is adjustable.
21. Induktionsheizer nach Anspruch 19 oder 20, dadurch gekennzeichnet, dass die Breite der Schächte (150 1, 150 r) durch an den Schenkeln (142 1, 142 r, 143) des Jochs auswechselbar befestigte ferromagnetische Metallplatten (155) einstellbar ist.21. Induction heater according to claim 19 or 20, characterized in that the width of the shafts (150 1, 150 r) by the legs (142 1, 142 r, 143) of the yoke exchangeable mounted ferromagnetic metal plates (155) is adjustable.
22. Induktionsheizer nach Anspruch 21, dadurch gekennzeichnet, dass die relative magnetische Permeabilität der Metallplatten (155) von der des Jochs (140) abweicht. 22. Induction heater according to claim 21, characterized in that the relative magnetic permeability of the metal plates (155) differs from that of the yoke (140).
23. Verfahren zum Verstellen der Breite der Schächte eines Induktionsheizers nach einem der Ansprüche 19 bis 22 mit den Schritten: a) Abschalten der Spule (121), b) Verändern der Breite der Schächte (142 1, 142 r) .23. A method for adjusting the width of the ducts of an induction heater according to one of claims 19 to 22, comprising the steps of: a) switching off the coil (121), b) changing the width of the ducts (142 1, 142 r).
24. Verfahren nach Anspruch 23, dadurch gekennzeichnet, dass nach Schritt a) und vor Schritt b) das Joch (140) entmagnetisiert wird.24. The method according to claim 23, characterized in that after step a) and before step b), the yoke (140) is demagnetized.
25. Verfahren nach Anspruch 24, dadurch gekennzeichnet, dass das Joch (140) durch Wechselstromspeisung einer Spulenanordnung entmagnetisiert wird.25. The method according to claim 24, characterized in that the yoke (140) is demagnetized by AC power supply of a coil assembly.
26. Verfahren nach Anspruch 25, dadurch gekennzeichnet, dass die supraleitende Spule (121) mit Wechselstrom gespeist wird. 26. The method according to claim 25, characterized in that the superconducting coil (121) is fed with alternating current.
EP08773966A 2007-07-26 2008-07-10 Induction heater Not-in-force EP2183944B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202007014930U DE202007014930U1 (en) 2007-07-26 2007-07-26 induction heater
DE102007051144A DE102007051144B4 (en) 2007-07-26 2007-10-25 Induction heater and method for adjusting the width of the wells of such induction heater
PCT/EP2008/005646 WO2009012895A2 (en) 2007-07-26 2008-07-10 Induction heater

Publications (2)

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EP2183944A2 true EP2183944A2 (en) 2010-05-12
EP2183944B1 EP2183944B1 (en) 2010-09-22

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US (1) US20090272734A1 (en)
EP (1) EP2183944B1 (en)
JP (1) JP4703781B2 (en)
KR (1) KR101129097B1 (en)
CN (1) CN101766050A (en)
AT (1) ATE482602T1 (en)
AU (1) AU2008280488B2 (en)
CA (1) CA2688069C (en)
DE (2) DE102007051144B4 (en)
ES (1) ES2351679T3 (en)
RU (1) RU2010106389A (en)
TW (1) TWI377874B (en)
WO (1) WO2009012895A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5413814B2 (en) * 2010-04-07 2014-02-12 住友電気工業株式会社 Power generation system
CN101908453B (en) * 2010-08-29 2012-11-14 宜兴市华宇电光源有限公司 Inflatable protective device for sealing machine with energy-saving lamp tube
DE102010053283A1 (en) 2010-12-02 2012-06-06 Zenergy Power Gmbh Method and induction heater for heating billets
DE102010053284A1 (en) 2010-12-02 2012-06-06 Zenergy Power Gmbh Method and induction heater for heating a billet
CN103313449B (en) * 2013-05-14 2015-09-09 上海超导科技股份有限公司 Induction heating equipment and induction heating method thereof
CN103916055B (en) * 2014-02-18 2016-03-30 上海超导科技股份有限公司 Based on direct supercurrent induction heating motor starting device and the method thereof of reduction box
CN103916054B (en) * 2014-02-18 2016-06-15 上海超导科技股份有限公司 Heating motor starting device and method thereof is sensed based on the direct supercurrent taking off magnetic
CN107553889A (en) * 2017-09-26 2018-01-09 鹤壁天海环球电器有限公司 Intelligent crawler type list both-end thermo-contracting-tube machine
KR102408264B1 (en) * 2019-10-01 2022-06-13 주식회사 피에스텍 Stacked Core and Induction Heating Apparatus Using the Same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US541218A (en) * 1895-06-18 E norsis pttefls co
FR904159A (en) * 1943-05-11 1945-10-29 Deutsche Edelstahlwerke Ag Device for the heat treatment of metal parts by induction
DE1690547B2 (en) * 1968-01-19 1971-04-22 Aeg Elotherm Gmbh DEVICE FOR ADJUSTING THE EFFECTIVE LENGTH OF AN INDUCTOR FOR HEATING METALLIC WORKPIECES
AT323783B (en) * 1972-03-28 1975-07-25 Elin Union Ag ARRANGEMENT FOR INDUCTIVE HEATING OF METALLIC WORKPIECES WITH SMALL CROSS-SECTION DIMENSIONS COMPARED TO THE LENGTH, WHITE IN PARTICULAR WIRES
FR2566986B1 (en) * 1984-06-28 1986-09-19 Electricite De France ELECTROMAGNETIC INDUCTION DEVICE FOR HEATING METAL ELEMENTS
US4761527A (en) * 1985-10-04 1988-08-02 Mohr Glenn R Magnetic flux induction heating
FR2590434A1 (en) * 1985-11-20 1987-05-22 Siderurgie Fse Inst Rech Inductor and device for inductive reheating of edges of a metallurgical product
FR2661849B1 (en) * 1990-05-10 1995-03-17 Siderurgie Fse Inst Rech METHOD AND DEVICES FOR INDUCTION HEATING OF A METALLURGICAL PRODUCT IN AN ELONGATE SHAPE.
DE10046547A1 (en) * 2000-09-19 2002-03-28 Innovat Ges Fuer Sondermaschb Inductive heating device for rotationally symmetrical conductive workpiece has 2 magnetisable coil cores for inductive heating coils separated by air-gap receiving workpiece
DE102005061670B4 (en) * 2005-12-22 2008-08-07 Trithor Gmbh Method for inductive heating of a workpiece

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009012895A2 *

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ATE482602T1 (en) 2010-10-15
JP4703781B2 (en) 2011-06-15
KR20100037112A (en) 2010-04-08
ES2351679T3 (en) 2011-02-09
US20090272734A1 (en) 2009-11-05
WO2009012895A2 (en) 2009-01-29
WO2009012895A3 (en) 2009-04-30
DE502008001418D1 (en) 2010-11-04
CN101766050A (en) 2010-06-30
AU2008280488A1 (en) 2009-01-29
TW200922383A (en) 2009-05-16
DE102007051144B4 (en) 2010-06-02
RU2010106389A (en) 2011-09-10
JP2010534904A (en) 2010-11-11
KR101129097B1 (en) 2012-03-27
CA2688069A1 (en) 2009-01-29
TWI377874B (en) 2012-11-21
EP2183944B1 (en) 2010-09-22
CA2688069C (en) 2010-10-12
DE102007051144A1 (en) 2009-02-05
AU2008280488B2 (en) 2011-07-07

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