EP4464126A1 - Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung - Google Patents
Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendungInfo
- Publication number
- EP4464126A1 EP4464126A1 EP23817986.5A EP23817986A EP4464126A1 EP 4464126 A1 EP4464126 A1 EP 4464126A1 EP 23817986 A EP23817986 A EP 23817986A EP 4464126 A1 EP4464126 A1 EP 4464126A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- induction heating
- heating device
- inverter
- designed
- rectifier
- 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
Links
Classifications
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- 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
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
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- 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
- H05B6/04—Sources of current
-
- 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
- H05B6/06—Control, e.g. of temperature, of power
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- 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
- H05B6/40—Establishing desired heat distribution, e.g. to heat particular parts of workpieces
-
- 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
- H05B6/44—Coil arrangements having more than one coil or coil segment
Definitions
- Induction heating device system, production line, process and use
- the invention relates to an induction heating device, a system, a production line, a method and a use.
- Production lines for the manufacture and/or processing of semi-finished products and/or preliminary products and/or intermediate products and/or products made of iron, steel and/or non-ferrous metal materials consist of a plurality of devices in which the preliminary product and/or the intermediate product and/or the product is each subjected to one or more process steps.
- the devices can be, for example, heating or cooling devices, transport devices, shaping devices, cleaning devices, chemical treatment devices, surface coating devices, separating or joining devices, and combinations thereof.
- the process steps can be, for example, raising or lowering the temperature, transport, forming, cleaning, chemical treatment, coating the surface, separating or joining, and combinations thereof.
- an inductor In induction heating using an induction heating device, an inductor is excited to oscillate, particularly in the medium frequency range. It is known to integrate this inductor with the aid of an additional capacitance into a so-called oscillating circuit, which is excited by an inverter, for example by switching on voltage pulses close to the resonance frequency of the oscillating circuit using a bridge circuit, half-bridge circuit or using a single switch.
- a mains voltage for example a single-phase or multi-phase alternating voltage
- the direct voltage is fed to an inverter, which excites the inductor.
- the invention is based on the object of providing an improvement or an alternative to the prior art.
- an induction heating device for heating a metallic product, in particular a semi-finished product and/or a preliminary product and/or an intermediate product and/or a product made of iron, steel and/or a non-ferrous metal material, comprising:
- a power supply device for supplying the oscillating circuits with electrical energy comprising: • a disconnect switch for connecting the induction heating device to an electrical power supply, and
- the energy supply device has a switching device, wherein the switching device is designed to enable at least an indirect energy coupling between the isolating switch and the oscillating circuits, wherein a number of oscillating circuits that can be coupled with energy at the same time is smaller than the number of oscillating circuits of the induction heating device.
- An “induction heating device” is understood to mean a device which is designed for inductive heating of a metallic product using electrical energy.
- the induction device generates with at least one "oscillating circuit" comprising at least one coil a coil induced alternating magnetic field. If the metallic item is in an active connection with the alternating magnetic field, the alternating magnetic field induces an electrical voltage in the metallic item, which leads to an electrical current in the metallic item, in particular an alternating electrical current. This current always runs in closed paths, can therefore also be referred to as an eddy current and causes the metallic item to heat up in accordance with Joule losses. In the case of a ferromagnetic metallic item, heating also occurs as a result of remagnetization losses until the Curie temperature is reached, at which point the ferromagnetic or ferroelectric properties of the metallic item have completely disappeared.
- an induction heating device can be used to directly heat the metallic material, since the heat is generated in the metallic material itself and does not have to be introduced from the outside via the surface of the metallic material by heat conduction, convection and/or radiation.
- a "metallic good” means any product comprising an electrically conductive ferrous material, a steel material and/or a non-ferrous metal material.
- a metallic good can be understood to mean any semi-finished product and/or any preliminary product and/or any intermediate product and/or any product which is electrically conductive.
- a coil of an induction heating device may have less than one complete turn, one complete turn and/or more than one complete turn, in particular more than or equal to two turns, more than or equal to three turns or more than or equal to four turns.
- An effective connection between a metallic object and an alternating magnetic field can be achieved by longitudinal field induction and/or by transverse field induction.
- the magnetic field lines in the metallic material run essentially in a transverse direction of the metallic material, in particular in the thickness direction and/or in the width direction of the metallic material. If the metallic material is a sheet, the magnetic field lines in the case of transverse field induction can essentially enter the sheet in the thickness direction of the sheet and exit the sheet again in the thickness direction.
- a “power supply device” is understood to mean a device which is designed to provide electrical energy for the operation of at least one oscillating circuit, in particular with electrical current of suitable current intensity, suitable voltage and/or suitable frequency.
- a power supply device can be designed to provide electrical energy for a plurality of oscillating circuits, in particular for at least two oscillating circuits, three, four, five, six or more oscillating circuits.
- a power supply device can be designed to prepare and provide electrical energy for the oscillating circuit for an efficient, optimal operation of a oscillating circuit, in particular with the optimal frequency and/or the optimal phase position to the phase position of the oscillating circuit.
- a power supply device can be designed to prevent or reduce any effects on an electrical power supply that arise from the operation of a resonant circuit.
- a power supply device is designed for connection to an electrical power supply.
- An electrical power supply can be understood as a three-phase power supply network.
- An electrical power supply can be an alternating current supply or a direct current supply.
- a power supply can be medium voltage or high voltage.
- High voltage can be greater than or equal to 36 kV, preferably greater than or equal to 60 kV and particularly preferably greater than or equal to 100 kV. Furthermore, high voltage can be greater than or equal to 150 kV, preferably greater than or equal to 200 kV and particularly preferably greater than or equal to 300 kV. High voltage can be less than or equal to 400 kV. Furthermore, high voltage can be less than or equal to 300 kV, preferably less than or equal to 200 kV and particularly preferably less than or equal to 150 kV.
- Medium voltage can be greater than or equal to 1 kV alternating current or greater than or equal to 1.5 kV direct current, preferably greater than or equal to 2 kV and particularly preferably greater than or equal to 10 kV.
- Medium voltage can be greater than or equal to 15 kV, preferably greater than or equal to 20 kV and particularly preferably greater than or equal to 30 kV.
- Medium voltage can be less than or equal to 36 kV.
- medium voltage can be less than or equal to 30 kV, preferably less than or equal to 20 kV and particularly preferably less than or equal to 15 kV.
- the voltage levels may be defined according to IEC 60519-4.
- a “disconnector” is a switching element which is designed to close an electrical circuit or to de-energise it, in particular for service and/or maintenance work or operational interruptions.
- a disconnector can be designed as a circuit breaker for high currents.
- the power supply device comprises a single-phase isolating switch or a three-phase isolating switch.
- a disconnector connects the power supply device to earth potential in the open position. This can increase safety against electric shocks.
- An “inverter” is a power electronic device or an electrical circuit designed to convert a direct current (DC) into an alternating current (AG). The resulting AC frequency depends on the inverter's switching algorithm.
- An inverter circuit can be controlled by applying a pulse width modulation algorithm.
- the inverter can be designed for the operation of a specific oscillating circuit.
- a “switching device” is understood to mean an assembly that is designed to switch an electrically conductive connection by means of a switch, i.e. an electrically conductive To establish or break a connection between at least two contacts.
- a switching device can be designed to switch an alternating current.
- the switching device can be arranged accordingly between an inverter and at least one resonant circuit.
- a switching device can be designed to switch a direct current.
- the switching device can be arranged accordingly between a rectifier or a smoothing circuit or a direct current supply and at least one resonant circuit.
- a switching device preferably has a plurality of switching options between a power source, preferably an alternating current source or a direct current source, and at least two consumers, preferably three, four, five or more consumers, in particular resonant circuits and/or inverters.
- the switching device can be designed to disconnect or establish exactly one connection between a power source and exactly one of the consumers or to switch to another consumer.
- the switching device can be designed to disconnect or establish or switch two, three, four or more connections between exactly one power source and two, three, four or more of the consumers, in particular to switch in pairs.
- a switching device can be designed to include a plurality of power sources, wherein a power source can be connected to or disconnected from or changed with exactly one consumer or a plurality of consumers.
- the switching device is preferably designed so that less than one connection can be established between a consumer and at least two power sources at the same time.
- a power supply device for an induction heating device comprising a circuit breaker, at least two inverters and a switching device, wherein the circuit breaker is designed to connect the power supply device to an electrical power supply, wherein an inverter is designed to convert a direct current into an alternating current to supply energy to a resonant circuit, wherein the switching device is designed to enable at least indirect energy coupling between the circuit breaker and a plurality of resonant circuits, and wherein a number of resonant circuits that can be simultaneously energy-coupled is smaller than a number of resonant circuits that can be at least indirectly connected to the switching device.
- the energy supply device allows at least one component of the energy supply device to be used alternately and/or intermittently for a plurality of oscillating circuits, whereby the majority of the oscillating circuits cannot be operated simultaneously.
- certain components of the energy supply device in particular the isolating switch, are only installed as often as they are necessary for the sensible simultaneous operation of the installed/installable oscillating circuits, while the oscillating circuits can be installed at any position in a production line where heating may be required.
- an induction heating device which has a power supply device as described above and at least two oscillating circuits.
- Energy supply devices account for a large proportion of the investment costs of an induction heating device.
- the energy supply device proposed here can reduce the investment costs for an induction heating device, in particular for an induction heating device with spatially distributed oscillating circuits.
- Oscillating circuits are currently operated primarily depending on the product being manufactured. It is possible that a total of six oscillating circuits are installed within a production line, but in any case only a maximum of three oscillating circuits are operated simultaneously. If each induction heating device contains all the components of an energy supply device, the associated investment costs are incurred in full.
- Modern production lines must generally be able to respond flexibly to a wide range of metallic goods to be produced, each with its own requirements for temperature control during the process steps to be carried out.
- the most favourable mode of operation of the production line can, depending on the product, the products produced before and after, the current energy price mix and other boundary conditions, require the use of oscillating circuits at different positions within the production line.
- the energy supply system proposed here can improve the flexibility of the production line, reduce the reaction time during product changeover, improve the energy efficiency of the production line in operating modes or metal- ical goods that allow this can be improved and the structural length of a production line can be shortened.
- the isolating switch is designed to connect the induction heating device to a direct current supply.
- the isolating switch of the energy supply device is designed to be connected to a direct current supply, preferably to a direct current supply having a medium voltage or a low voltage.
- the inverters of the energy supply device can be designed such that they can be indirectly connected to the direct current supply, preferably therefore can be fed with a medium-voltage direct current or a low-voltage direct current.
- Low voltage can be greater than or equal to 120 V, preferably greater than or equal to 220 V and particularly preferably greater than or equal to 240 V. Low voltage can be less than or equal to 1,000 V and particularly preferably less than or equal to 900 V. Low voltage can be less than or equal to 600 V, preferably less than or equal to 240 V and particularly preferably less than or equal to 220 V.
- the isolating switch is designed to connect the induction heating device to an alternating current supply, wherein the energy supply device between the isolating switch and the at least one inverter has at least one rectifier, in particular two, three, four, five, six or more rectifiers, for converting an alternating current into a direct current for supplying energy to the at least one inverter.
- the energy supply device between the isolating switch and the at least one inverter has at least one rectifier, in particular two, three, four, five, six or more rectifiers, for converting an alternating current into a direct current for supplying energy to the at least one inverter.
- a “rectifier” is an electrical device that converts alternating current, which periodically changes direction, into direct current.
- a rectifier may be a three-phase rectifier.
- the rectifier may be designed to be supplied with a medium voltage or a low voltage.
- a rectifier may have a topology that includes diodes and/or consists of diodes.
- a three-phase rectifier may be an uncontrolled n-by-6-pulse diode rectifier, in particular a 6-pulse diode rectifier, a 12-pulse diode rectifier, an 18-pulse diode rectifier, and so on.
- a rectifier can be advantageously controlled or regulated. This can ensure that the energy supply device does not have to be connected to a static reactive power compensator in order to comply with the specifications of an electricity supply operator.
- the energy supply device expediently has a transformer between the isolating switch and the at least one rectifier.
- a “transformer” is a component that transfers electrical energy from one circuit to another without a conductive connection between the two circuits.
- the transformer converts an alternating current (AC) to a primary side of the transformer into an alternating current on a secondary side of the transformer.
- AC alternating current
- a transformer can be a three-phase transformer.
- the transformer may be a high voltage to medium voltage transformer that converts a high voltage on a primary side of the transformer into a medium voltage on a secondary side of the transformer.
- the transformer may be a high voltage to low voltage transformer that converts a high voltage on a primary side of the transformer to a low voltage on a secondary side of the transformer.
- the transformer may be a medium voltage to low voltage transformer that converts a medium voltage on a primary side of the transformer to a low voltage on a secondary side of the transformer.
- the disconnector is designed as a medium-voltage switchgear.
- a “medium-voltage switchgear” is understood to mean a central arrangement of circuit breakers and/or fuses and/or protective switches which serve to protect and/or control and/or earth the power supply device.
- the at least one inverter and/or the at least one rectifier are designed for medium voltage operation.
- the at least one rectifier and/or the at least an inverter designed to supply medium voltage.
- the energy supply device has a smoothing circuit between the isolating switch and the at least one inverter, in particular between the at least one rectifier and the at least one inverter.
- the derivation of a direct current voltage within a power supply, in particular within a power supply device, from an alternating current source can lead to a ripple voltage, in particular when using a diode rectifier.
- the ripple voltage is a periodic residual fluctuation in the output voltage of a rectifier.
- a rectifier can be connected to a "smoothing circuit" which is designed to smooth the ripple voltage.
- the smoothing circuit may comprise a capacitor connected in parallel to a rectifier circuit.
- the smoothing circuit may include an inductance connected in series with a rectifier circuit.
- a rectifier and an inverter can be energetically coupled to one another using DC busbars.
- the energy supply device has between the isolating switch and the at least one inverter, in particular between the at least one Rectifier and at least one inverter, a DC-DC converter.
- a “DC-DC converter” is a power electronic device or an electrical circuit designed to convert a direct current (DC) at the input of the DC-DC converter with a voltage supplied at the input into a direct current at the output of the DC-DC converter with a higher, lower or inverted voltage level.
- a DC-DC converter arranged between a rectifier and an inverter, enables a change in the voltage level between the rectifier and the inverter.
- a medium-voltage rectifier can be combined with a low-voltage inverter. This can improve the overall efficiency of the energy supply device.
- a switching device is arranged between a rectifier and at least two inverters, wherein the switching device is designed to
- a switching device is connected between the Disconnector and at least two inverters, wherein the switching device is designed to
- the switching device proposed here is arranged between a rectifier or a circuit breaker and at least two inverters, so that the switching device is designed to switch in the area of direct current transmission.
- the nominal power of the components up to the switching device can also be dimensioned smaller accordingly and in comparison to the sum of the nominal powers of all installed oscillating circuits, in particular the nominal power of the circuit breaker and/or the transformer and/or the rectifier.
- the nominal electrical power that can be provided by the energy supply device can also be provided by a plurality of individual components. provided, in particular by components connected in parallel to one another. For example, a plurality of transformers and/or a plurality of rectifiers can be connected in parallel upstream of the switching device without departing from the aspect proposed here.
- the components connected in parallel can be designed in such a way that they can each provide a portion of the respective required electrical nominal power.
- the induction heating device may have at least one rectifier and/or one transformer and/or one circuit breaker less than resonant circuits.
- the switching device can be designed in such a way that of the plurality of oscillating circuits connected to the individual switching device, exactly one oscillating circuit can be simultaneously energy-coupled to the direct current connection of the switching device.
- the majority of the oscillating circuits connected to the switching device can be operated accordingly alternately and/or intermittently.
- the switching device is designed in such a way that an energy coupling can be established between the direct current connection of the switching device and a group of inverters, in particular an energy coupling between the direct current connection of the switching device and a subset of the group of inverters, wherein it is also provided here that at least one oscillating circuit can be operated simultaneously in comparison to the total number of oscillating circuits installed.
- one switching connection can be changed alternately or intermittently or that a A plurality of switching connections can be changed simultaneously alternately and/or intermittently, in particular it can also be provided that a pair of resonant circuits can be switched simultaneously, in particular a first pair of resonant circuits can be changed simultaneously with a second pair of resonant circuits.
- a first pair of oscillating circuits arranged in a front area of a production line can be operated alternately or intermittently with a second pair of oscillating circuits arranged in a rear area of the production line.
- a switching device is expediently arranged between an inverter and at least two resonant circuits, wherein the switching device is designed to
- the switching device proposed here is arranged between an inverter and at least two resonant circuits, so that the switching device is designed to switch in the area of alternating current transmission.
- the induction heating device can have at least one rectifier and/or one inverter and/or one transformer and/or one isolating switch less than oscillating circuits. Furthermore, the induction heating device can be dimensioned with regard to the nominal power that can be provided by the energy supply device such that this is smaller than the sum of the nominal powers of the oscillating circuits included in the induction heating device.
- an induction heating device can also have a plurality of switching devices.
- the induction heating device can have at least two switching devices between at least one isolating switch and a plurality of at least indirectly connected inverters, wherein the plurality of switching devices can also be connected in parallel to one another and can be connected to exactly one isolating switch and/or exactly one transformer and/or exactly one rectifier.
- the induction heating device can have at least two switching devices between at least one inverter and a plurality of at least indirectly connected resonant circuits with preferably the same electrical properties, wherein the majority of the switching devices can also be connected in parallel to one another and can be connected to exactly one inverter and/or exactly one transformer and/or exactly one rectifier. Furthermore, it can be provided that the induction heating device can have one or more switching devices between at least one isolating switch and at least one plurality of inverters as well as one or more switching devices between at least one inverter and at least one plurality of resonant circuits.
- the induction heating device is designed to be mechanically movable and/or at least partially mechanically movable.
- mechanically movable means that the unit in question, in particular the induction heating device or the energy supply device, is detachably connected to the surface on which it is designed to stand, the unit has lifting means for fastening the unit to a crane or the like and/or the unit is supplied with electricity and/or operating materials, in particular cooling liquid, by means of detachable connecting means.
- the induction heating device can be used flexibly at different positions in a production line, whereby the time required for converting the production line can be minimized.
- the lifting devices mean that the induction heating device can be moved as required by a crane, an industrial truck and/or a different dedicated moving device.
- a single oscillating circuit can be designed to be movable so that it can be used alternately at different positions on a production line.
- the energy supply device is designed to be mechanically movable and/or at least partially mechanically movable.
- a part of a power supply device can in particular be a component of a power electronics system of a power supply device, in particular a transformer, a rectifier, a DC-DC converter, an inverter and/or a smoothing circuit.
- an oscillating circuit is designed for a longitudinal field induction and/or a transverse field induction.
- An oscillating circuit designed for a "longitudinal field induction” can have a coil which encloses at least one edge of the metallic material, preferably at least two edges and particularly preferably four edges.
- a resonant circuit designed for longitudinal field induction has a plurality of turns of the coil wound transversely to the designated longitudinal extension of the metallic material, preferably at least two turns, preferably at least three turns and particularly preferably at least four turns, wherein the majority of the turns are preferably arranged compactly next to one another, wherein the shortest distance between two adjacent turns is preferably smaller than a transverse extension of a turn.
- a resonant circuit designed for a "transverse field induction” has a coil which extends predominantly in a plane, preferably in a meandering manner in a plane, wherein the coil preferably does not enclose any edge of the metallic material.
- a resonant circuit designed for "transverse field induction” has a first coil and a second coil, each of which extends predominantly in one plane, preferably each extending in a meandering manner in one plane, wherein the coils preferably do not enclose any edge of the metallic material.
- the respective extension planes can be arranged parallel to one another.
- the respective coils can be arranged mirror-symmetrically to one another.
- the metallic material to be heated is guided through between the coils, preferably guided through in the mirror plane.
- a coil arrangement designed in this way comprising a first coil extending essentially in one plane and a second coil extending in a mirror-symmetrical manner, can also be used for a longitudinal field induction if each coil forms a separate resonant circuit and the resonant circuits are operated in opposite clocks, i.e. have a phase angle of the respective operating currents of preferably 180 degrees.
- an oscillating circuit designed for transverse field induction and an oscillating circuit designed for longitudinal field induction can be operated on at least partially the same energy supply device, whereby the investment costs of a production line can be reduced.
- the isolating switch, the rectifier and the smoothing circuit can be used equally and without modification for an oscillating circuit designed for transverse field induction and an oscillating circuit designed for longitudinal field induction.
- the inverter of the energy supply device can also be the same, whereby a different operating mode can be selected if necessary and/or a different control and/or regulating signal can be used for the inverter, in particular a different pulse width modulation signal.
- an electrical connection between an inverter and a resonant circuit is formed by means of a fluid-cooled busbar, in particular a busbar designed for internal cooling with a fluid.
- a busbar between an inverter and a resonant circuit can be cooled with a liquid coolant, in particular with water, wherein the coolant can preferably be guided within the busbar and further preferably by the busbar.
- a busbar can be cooled by means of forced convection, among other things.
- a busbar can be cooled with a gaseous coolant, in particular with air or a different gas mixture. This allows the busbar to be cooled both by forced convection and/or by free convection.
- the object is achieved by a system comprising a plurality of induction heating devices according to the first aspect of the invention.
- the object is achieved by a production line for producing and/or processing a metallic product, in particular a semi-finished product and/or a preliminary product and/or an intermediate product and/or a product made of iron, steel and/or a non-ferrous metal material, comprising an induction heating device according to the first aspect of the invention and/or a system according to the second aspect of the invention.
- an induction heating device according to the first aspect of the invention and/or a system according to the second aspect of the invention can be directly transferred to a production line for producing and/or processing a metallic product, in particular a semi-finished product and/or a preliminary product and/or an intermediate product and/or a product made of iron, steel and/or a non-ferrous metal material, comprising an induction heating device according to the first aspect of the invention and/or a system according to the second aspect of the invention.
- a production line can be a hot rolling mill, in particular with a warm or hot insert, and/or a strip processing line.
- the object is achieved by a method for operating an induction heating device according to the first aspect of the invention, wherein at least two oscillating circuits are operated alternately and/or intermittently at different locations in a production line.
- the object is achieved by using an induction heating device according to the first aspect of the invention for producing and/or processing a metallic product, in particular a semi-finished product and/or a preliminary product and/or an intermediate product and/or a product made of iron, steel and/or a non-ferrous metal material.
- Figure 1 schematically shows a system comprising a plurality of induction heating devices according to the prior art
- Figure 2 schematically shows a first embodiment of a system of induction heating devices
- Figure 3 schematically shows a second embodiment of a system of induction heating devices
- Figure 4 schematically a third embodiment of a system of induction heating devices.
- a system 500 having a plurality of induction heating devices 100, in particular having seven induction heating devices 100, according to the prior art in Figure 1 for heating a metallic material (not shown) essentially consists of a plurality of mutually independent induction heating devices 100, which have less than one direct operative connection with one another.
- an induction heating device 100 consists of a power supply device 20 and a resonant circuit 10, wherein the power supply device 20 has at least one inverter 28 and a circuit breaker 22.
- Each induction heating device 100 has at least one isolating switch 22, exactly one inverter 28 and exactly one oscillating circuit 10, wherein the oscillating circuit 10 is designed to generate a magnetic field for heating the metallic material (not shown).
- the disconnect switch 22 is designed to connect the induction heating device 100 to an electrical power supply (not shown).
- the inverter 28 is designed to convert a direct current into an alternating current to supply energy to the oscillating circuit 10 and is connected to the oscillating circuit 10 by means of an alternating current transmission 29.
- the electrical power supply (not shown) can be a direct current transmission network, in particular a direct current transmission network with a medium voltage.
- the inverter 28 can be connected to the electrical power supply directly via the isolating switch 22 or indirectly via a direct current converter (not shown) and the isolating switch 22 by means of a direct current transmission 27.
- the electrical power supply can be an alternating current supply, in particular a three-phase alternating current network.
- the energy supply device 20 has a rectifier 26, which is connected to the inverter by means of a direct current transmission 27 directly and/or by means of a direct current converter (not shown). ter 28.
- the energy supply device 20 can have a transformer 24.
- the electrical power supply (not shown) can be, among other things, a high-voltage power supply or a medium-voltage power supply, wherein a transformer 24 can be set up to convert the high voltage into a medium voltage or a low voltage or to convert the medium voltage into a low voltage.
- the majority of the induction heating devices 100 in the system 500 can be arranged in a production line (not designated/not shown) for producing/processing a metallic product, in particular a semi-finished product and/or a preliminary product and/or an intermediate product and/or a product made of iron, steel and/or a non-ferrous metal material, which, in addition to the induction heating devices 100, can also have treatment devices 40 for treating the metallic product (not shown) and wherein the metallic product (not shown) can be conveyed through the production line (not designated/not shown) in a preferred direction of movement 42.
- a production line not designated/not shown
- different positions within the production line are conceivable for the respective oscillating circuits 10.
- a system 500 having a plurality of induction heating devices 100, in particular having three induction heating devices 100, in Figure 2 has a plurality of switching devices 30, in particular a number of switching devices 30 which corresponds to the number of induction devices 100, in particular three switching devices 30, wherein the system has six oscillating circuits 10 for heating a metallic material (not shown).
- the system 500 comprising a plurality of induction heating devices 100 also comprises a plurality of energy supply devices 20, in particular a number of energy supply devices 20 which corresponds to the number of induction devices 100, in particular three energy supply devices 20.
- the switching devices 30 are each arranged in the area of the alternating current transmission 29 of the induction heating device 100.
- Each energy supply device 20 has at least one isolating switch 22 and at least one inverter 28, wherein each inverter 28 is indirectly connected to at least two resonant circuits 10 via a switching device 30.
- a power supply device 20 can also have a transformer 24 and/or a rectifier 26, wherein a rectifier can be connected directly to an inverter 28 by means of a direct current transmission 27 and/or a direct current converter (not shown).
- Each switching device 30 has at least two switches 32 which make a connection state between an inverter 28 and a respective oscillating circuit 10 adjustable.
- the induction heating device 100 proposed here has a switching device 30 within the energy supply device 20, whereby a plurality of oscillating circuits can be supplied and/or operated alternately or intermittently or, if the oscillating circuits 10 are electrically configured the same, simultaneously by a common energy supply device 20. This enables a reduction in the necessary investment costs compared to the prior art.
- the number of oscillating circuits 10 to which electrical energy can be made available alternately and/or intermittently or simultaneously by the energy supply device 20 can be greater than the number of energy supply devices 20.
- a system 500 having a plurality of induction heating devices 100, in particular having three induction heating devices 100, in Figure 3 also has a plurality of switching devices 30, in particular a number of switching devices 30 which corresponds to the number of induction devices 100, in particular three switching devices 30, wherein the system has seven oscillating circuits 10 for heating a metallic material (not shown).
- the switching devices 30 are arranged here in the region of the direct current transmission 27.
- an inverter 28 is connected to each oscillating circuit 10 by means of an alternating current transmission 29.
- a system 500 having a plurality of induction heating devices 100, in particular having two induction heating devices 100, in Figure 4 also has a plurality of switching devices 30, in particular a number of switching devices 30 which corresponds to the number of induction devices 100, in particular two switching devices 30, wherein the system has seven oscillating circuits 10 for heating a metallic material (not shown).
- a first induction heating device 100 is designed in such a way that two oscillating circuits 10 are arranged at the front end of a production line (not shown) and at the rear end of the production line.
- the oscillating circuits 10 arranged at the front end can be operated in pairs, alternating or intermittently with the oscillating circuits 10 arranged at the rear end.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP25203149.7A EP4651625A3 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022132027.8A DE102022132027A1 (de) | 2022-12-02 | 2022-12-02 | Induktionsheizvorrichtung, System, Produktionslinie, Verfahren und Verwendung |
| PCT/EP2023/083960 WO2024115750A1 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25203149.7A Division-Into EP4651625A3 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
| EP25203149.7A Division EP4651625A3 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4464126A1 true EP4464126A1 (de) | 2024-11-20 |
| EP4464126B1 EP4464126B1 (de) | 2025-11-05 |
Family
ID=89119332
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25203149.7A Pending EP4651625A3 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
| EP23817986.5A Active EP4464126B1 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25203149.7A Pending EP4651625A3 (de) | 2022-12-02 | 2023-12-01 | Induktionsheizvorrichtung, system, produktionslinie, verfahren und verwendung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250287473A1 (de) |
| EP (2) | EP4651625A3 (de) |
| JP (1) | JP2025507028A (de) |
| CN (1) | CN118872379A (de) |
| DE (1) | DE102022132027A1 (de) |
| WO (1) | WO2024115750A1 (de) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1090352B (de) * | 1959-07-16 | 1960-10-06 | Bbc Brown Boveri & Cie | Verfahren zur kontinuierlichen elektroinduktiven Erwaermung von metallischen Rohlingen, beispielsweise Stahlbloecken |
| JPS5376446A (en) * | 1976-12-17 | 1978-07-06 | Mitsubishi Electric Corp | Induction heating apparatus |
| JPS54110907A (en) * | 1978-02-21 | 1979-08-30 | Nippon Kokan Kk <Nkk> | Induction heater |
| DE3040820C2 (de) * | 1980-10-30 | 1983-06-01 | Aeg-Elotherm Gmbh, 5630 Remscheid | Einrichtung zur induktiven Beheizung eines Werkstückes mittels mehrerer Induktoren |
| US4420667A (en) * | 1982-06-21 | 1983-12-13 | Park-Ohio Industries, Inc. | Induction heating method and apparatus for elongated workpieces |
| JPS6029396U (ja) * | 1983-08-04 | 1985-02-27 | 日本電子株式会社 | 高周波誘導加熱装置 |
| DE3342889C2 (de) * | 1983-11-26 | 1987-04-23 | Aeg-Elotherm Gmbh, 5630 Remscheid | Einrichtung zur induktiven Erwärmung von Werkstücken |
| US4778971A (en) * | 1986-05-23 | 1988-10-18 | Kabushiki Kaisha Meidensha | Induction heating apparatus |
| DE3710085C2 (de) * | 1987-03-27 | 1994-07-21 | Asea Brown Boveri | Einrichtung zur induktiven Erwärmung eines Werkstückes mittels mehrerer Induktoren |
| US5272719A (en) * | 1991-12-12 | 1993-12-21 | Inductotherm Corp. | Plural output power supply for induction holding and melting furnaces |
| JP2000012340A (ja) * | 1998-04-20 | 2000-01-14 | Sekisui Chem Co Ltd | 水冷トランスおよびこの水冷トランスを用いた高周波誘導加熱装置 |
| US6148019A (en) * | 1999-05-10 | 2000-11-14 | Inductotherm Corp. | Modular high power induction heating and melting system |
| JP2007144475A (ja) * | 2005-11-29 | 2007-06-14 | Mitsui Eng & Shipbuild Co Ltd | 鋼材の加熱方法及び誘導加熱装置 |
| JP4854567B2 (ja) * | 2007-03-30 | 2012-01-18 | 三井造船株式会社 | 誘導加熱方法および誘導加熱装置 |
| JP4893462B2 (ja) * | 2007-05-15 | 2012-03-07 | 株式会社明電舎 | 誘導加熱装置 |
| ES2353890B1 (es) * | 2008-12-19 | 2012-01-26 | Bsh Electrodomesticos España, S.A. | Campo de cocción con al menos tres zonas de calentamiento. |
| JP2012038621A (ja) * | 2010-08-09 | 2012-02-23 | Mitsui Eng & Shipbuild Co Ltd | 誘導加熱装置、および誘導加熱方法 |
| ES2441647B1 (es) * | 2011-12-05 | 2014-12-04 | Bsh Electrodomésticos España, S.A. | Dispositivo de calentamiento por inducción con una unidad de mando |
| KR101839012B1 (ko) * | 2016-02-17 | 2018-04-26 | (주) 누리기술 | 고주파 유도가열 열처리 전원장치 및 열처리 제어방법 |
| JP6340463B1 (ja) * | 2017-09-26 | 2018-06-06 | 高周波熱錬株式会社 | 電源装置 |
| EP3790180B1 (de) * | 2019-09-04 | 2022-08-10 | IAS GmbH | Vorrichtung und verfahren zur induktiven erwärmung von metallgut |
-
2022
- 2022-12-02 DE DE102022132027.8A patent/DE102022132027A1/de active Pending
-
2023
- 2023-12-01 US US18/855,300 patent/US20250287473A1/en active Pending
- 2023-12-01 EP EP25203149.7A patent/EP4651625A3/de active Pending
- 2023-12-01 CN CN202380025466.4A patent/CN118872379A/zh active Pending
- 2023-12-01 EP EP23817986.5A patent/EP4464126B1/de active Active
- 2023-12-01 JP JP2024552458A patent/JP2025507028A/ja active Pending
- 2023-12-01 WO PCT/EP2023/083960 patent/WO2024115750A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024115750A1 (de) | 2024-06-06 |
| CN118872379A (zh) | 2024-10-29 |
| EP4464126B1 (de) | 2025-11-05 |
| JP2025507028A (ja) | 2025-03-13 |
| DE102022132027A1 (de) | 2024-06-13 |
| EP4651625A2 (de) | 2025-11-19 |
| US20250287473A1 (en) | 2025-09-11 |
| EP4651625A3 (de) | 2026-01-21 |
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