WO2013156010A1 - Verfahren und vorrichtung zum herstellen von weichmagnetischem streifenmaterial für ringbandkerne - Google Patents
Verfahren und vorrichtung zum herstellen von weichmagnetischem streifenmaterial für ringbandkerne Download PDFInfo
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- WO2013156010A1 WO2013156010A1 PCT/DE2012/200027 DE2012200027W WO2013156010A1 WO 2013156010 A1 WO2013156010 A1 WO 2013156010A1 DE 2012200027 W DE2012200027 W DE 2012200027W WO 2013156010 A1 WO2013156010 A1 WO 2013156010A1
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- strip
- magnetic
- band
- shaped material
- soft magnetic
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0024—Charging; Discharging; Manipulation of charge of metallic workpieces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15316—Amorphous metallic alloys, e.g. glassy metals based on Co
Definitions
- the invention relates to a method for producing a soft magnetic strip material, in particular a procedural ⁇ ren for producing a soft magnetic strip material for rolling strip cores and an apparatus for performing the method.
- Soft magnetic material comes in various applicatio ⁇ gen used.
- it is used in wound magnetic cores, so-called ring band cores, which are used, inter alia, in current transformers, power transformers and power chokes as well as magnetic transducer heads or current transformer cores.
- ring band cores which are used, inter alia, in current transformers, power transformers and power chokes as well as magnetic transducer heads or current transformer cores.
- the known preparation devices are formed as continuous annealing in general and allow heat treatment of rascherstarrtem magnetic material (hereinafter "web material").
- web material rascherstarrtem magnetic material
- the rapidly solidified magnet material is prepared with ⁇ means of a casting process, and then wound into ei ⁇ ner roll, and then as a continuous band in to be introduced, the continuous annealing and processed by this too soft magnetic ⁇ ischenm material.
- the material is heat-treated and set at the same un ⁇ ter tension to obtain desired magnetic self ⁇ properties of the tape.
- the US Pat. No. 6,171,408 Bl describes a corresponding production method for toroidal cores, which consist of amorphous ferromagnetic material.
- the method provides for the gelling of an amorphous ferromagnetic strip, which is subsequently heated by a heated environment. moves and simultaneously exposed to a magnetic field. The speed of movement is so adapted to the heated Conversely ⁇ environment that a defined heating of the strip takes place for a defined period.
- the apparatus comprises a take-up spindle for receiving a ribbon wrap of amorphous cast strip material.
- the apparatus further comprises a temperature-controlled tunnel-shaped furnace for producing a nanocrystalline strip from the amorphous strip material and at least one S-shaped unit, which is arranged in front of an entrance of the tunnel-shaped furnace for the strip material and connected to a brake motor, and a tensioning device for adjusting the tensile force in the longitudinal direction of the amorphous strip material.
- a control device in conjunction with a force measuring device controls the brake motor of the S-shaped unit located in front of the entrance of the tunnel-shaped furnace.
- a second S-shaped unit is provided, wel ⁇ che is arranged below to an output of the tunnel-shaped furnace and connected to a motor.
- the device also has a winding mandrel for the nanocrystalline strip produced for producing a magnetic core of nanocrystalline material. With the help of this device, the winding (coil) is unwound on to the mounting spindleconcentrwi ⁇ oped amorphous strip material therefrom and passes through the front of the entrance of the tunnel-shaped furnace is arranged first ⁇ S-shaped unit, then
- Magnet core is wound.
- An example of such a wound magnetic core made of nanocrystalline material is also known from US Pat. No. 7,583,172 B2. This is used, inter alia, in current sensors and for this purpose should have the lowest possible permeability for the purpose of adequate measurement accuracy.
- the known devices and manufacturing methods thus provide for the to be processed amorphous strip material during the heat treatment under tension.
- an anisotropy can the applied tensile stress induced in the strip material, so that the at therefrom he ⁇ witnessed soft magnetic strip material a pronounced flat hysteresis loop with a defined permeability ⁇ (corresponding to the induced anisotropy) along the train ⁇ stress direction, since in the Under the described manufacturing method achievable permeability level of the applied tensile stress is dependent.
- the object of the invention is therefore to eliminate the above disadvantages beschrie ⁇ surrounded or at least reduce, in particular a soft magnetic strip material provide a constant as possible during the permeability along a longitudinal path of the strip material.
- the method further comprises: determining at least one measure of the magnetic erzeug ⁇ th soft magnetic strip material and
- a provided strip-shaped material in particular amorphous strip-shaped material, is provided, which is subjected to a heat treatment by application of the heat treatment temperature in a subsequent step.
- the band-shaped material is simultaneously applied to the heat treatment and / or subsequently thereto with the described tensile force in order to generate a tensile stress in the band-shaped material.
- Via the applied voltage train ⁇ a microstructural change of the material and thus an anisotropy, such as a transverse anisotropy, are induced in the band-shaped material.
- the tension is adjusted such that the soft magnetic strip material produced by means of the procedural ⁇ proceedings has a ⁇ been coined flat hysteresis loop with a defined Permea ⁇ ⁇ stability in tensile stress.
- the application of the tensile force can be carried out simultaneously with the heat treatment.
- the described regulation of the tensile force can then be carried out so as to set the tensile stress to a desired value. It is thus varied by means of the tensile force, the tensile stress, where ⁇ takes place in the control of the tensile force as a function of the ermit ⁇ ted at least one magnetic parameter.
- the tensile force in the step of controlling the tensile force, is varied such that the tensile stress in the longitudinal direction of the band-shaped material is kept substantially constant at least in sections along the longitudinal direction. Accordingly, the tensile force is comparable changes such that the locally in the ribbon-shaped material mr ⁇ Schende tension can be kept constant.
- the regulation of the tension can, so a process variably adjustable in the production force in the band, be used to the induced Ansiotropie K u and thus the Permeabi ⁇ formality ⁇ over the strip length constant to keep.
- the force in the belt is varied, for example, in small increments by a nominal tension value in order to compensate for local influences such as temperature differences, belt thickness fluctuations, slight variations in the throughput speed, changes in the composition of the material and so on.
- the induced anisotropy Ku and thus the permeability over a DEFINE ⁇ th segment, or even over the entire length of the bandför ⁇ -shaped material can be kept constant by means Regeins the tensile force as a function of a detected magnetic measure for setting a desired tension.
- the tensile stress only in sections held constant or continuously varied ⁇ means of the described control, it also opens up the possibility, by comparison Changing a corresponding default value to keep the tensile stress in a first section on a first value and in a subsequent second section at a second value constant.
- a corresponding default value to keep the tensile stress in a first section on a first value and in a subsequent second section at a second value constant.
- more than two sections with each individually set con ⁇ stant tension value can be provided.
- Each section can then be used for wrapping an own core and thus cores with different magneti ⁇ rule properties are generated sequentially, for example.
- the rules of the pulling force comprises an automatic ⁇ ULTRASONIC adjusting the tension by a predefined Sollzugschreibswert.
- the pulling force introduced ⁇ introduced into the band-shaped material can thus automatically in small steps or continuously around the Sollzugdozensswert in response to a magnetic measurement size can be varied at least to local influences in the band-shaped material, such as Tem ⁇ be temperature variations, strip thickness fluctuations, variations in the throughput speed and / or to compensate for changes in the material composition.
- a predefined setpoint can likewise be provided only for a defined section of the band-shaped material so that individual tensile stress levels can be assigned to one or more successive sections, whereby the induced anisotropy over the length of the respective section or can selectively adjust the permeability achieved in a wei ⁇ th area.
- a permeability ⁇ in the range of below 100 to 10000 can be achieved depending on a selected material composition of the strip-shaped material or an alloy used for this purpose.
- a relatively low permeability ⁇ is particularly advantageous for current transformers, power transmitters, storage chokes and other applications in which the roll ⁇ produced roll core is not to be saturated ferromagnetically, so that an inductance of the roller core does not suffer losses when high electrical currents flow through the windings around the roller core.
- a range suitable for the above-mentioned applications for ⁇ may be 1500 to 3000, 200 to 1500 or 50 to 200.
- a permeability range from 200 to 1500 and for Speicherdros clauses ⁇ a permeability range of about 50 to 200 is suitable for power transformers.
- other ranges of values can also be provided.
- the described embodiments provide the advantage that sections to specify a combination of the two preceding aspects, namely to keep the tension constant over a wide range and a tensile stress level by ei ⁇ NEN respective Sollzugschreibswert, is made possible. It does not, for example, is sufficient to introduce only a high train ⁇ force in the band-shaped material to achieve a nied ⁇ membered permeability, as the reached Zielpermea ⁇ stability would thus be precisely set only for a specific, localized area of the sheet material. Rather, in addition to the defined tension level very fine and above all trouble-free traction variations must be able to hold the tension, as described, to be able to maintain a constant value.
- each level can be produced by means of the control according to the invention with very small deviations from the predetermined desired permeability value over the entire strip length or over one or more defined sections.
- the method may include as an optional step, the applying of the sheet material with a magnetic field (magnetic field treatment), the magnetic treatment may for example take place subsequently or simultaneously to the Wär ⁇ meà.
- a treatment with more than one magnetic field such as a plurality of magnetic fields, each with a different spatial orientation, are provided.
- the method may further comprises a step of take-up to the step of determining includes at least a defined portion of the soft magnetic strip material produced ⁇ for generating at least one toroidal tape core below the at least one magnetic measuring size.
- the erzeug ⁇ te strip material can thus be wound up after the starting voranste ⁇ described steps to one or more toroidal cores. Since by means of the described method, a possible constant or steady permeabilized tucisverlauf on one or more levels is generated, the results with cores, each with a very constant Perme ⁇ abilticiansverotti within the core but also manufactured with low manufacturing tolerances of multiple cores with the same nominal value for the permeability become.
- the step of winding is controlled in response to the at least one magnetic measurement.
- This allows, for example, a ge ⁇ targeted winding of defined sections, which are determined by a characterization by means of the determined magnetic parameter. If, for example reached a schenliches under ⁇ permeability level, so a jump detected or generated in the permeability, the winding can be controlled accordingly. So at ⁇ winding a first core can play as canceled and a winding of a new core to begin.
- the step of winding comprises winding a defined number of tape layers of the produced soft magnetic strip material to produce the at least one ring tape core, wherein defining the number of tape layers in response to the at least one magnetic measurement. This can be found in ⁇ play, the local band thickness and the magnetic cross-sectional area associated therewith for the step of Aufwi- ckelns consideration. It can be determined before the actual winding a number of tape layers and in the
- each of the cores also has a defined core cross section with a core cross-sectional area in addition to a defined permeability profile over the length of the wound strip material.
- the band shape not only allows processing of the alloy under tensile stress in a continuous annealing plant described in more detail below, but also the production of roller cores with any number of windings.
- the size and the magnetic ⁇ properties of a roller conveyor core can be adjusted by an appropriate selection of the number of windings or tape layers to a designated application in a simple manner.
- the number of band layers can be varied such that a cross-sectional area A K Fei of a first th ring band core and a cross-sectional area A K Fe2 a second ring band core are substantially equal. It can thus be generated any number of annular band cores, each with the same size core cross-sectional area, but at least with a very small deviation of the respective core cross-sectional area.
- the number of band plies may for example also be varied so as to alter ⁇ natively, or in addition, the permeability of the first annular band ⁇ core and the permeability of the second toroidal tape core essen- sentlichen are equal.
- the effect of the at least partially kon ⁇ constants permeability and the effect of an equally large core cross-sectional area can be supported by an averaging process in Aufwi- disgusting of the respective core.
- a defined length for example, several meters
- Staccoma ⁇ terials away the respectively positive and negative deviations from a predefined desired value.
- the heat treatment temperature ⁇ and a passing speed of the sheet material in dependence on the respectively selected alloy are selected such that a magnetostriction of the heat-treated in accordance with in a state na- nokristallinen soft magnetic strip material is close to zero.
- This is considered as a basic condition for winding of the heat-treated soft magnetic strip material has a core, which in itsêtwi- disgusted condition, a similar or even identical permeabilization ⁇ ty has also after the winding process as the unwound strip material.
- the highest possible anisotropy induced in the production process of the soft magnetic strip material causes the core to be increasingly insensitive to the always constant small additional anisotropies due to the winding stresses.
- FIG. 1 A corresponding comparison of a hysteresis measured on the unwrapped soft magnetic strip material and a hysteresis determined on the wound roll core is shown in FIG.
- the strip-shaped material provided as starting material in the context of the described method can be subjected to heat stress under tension in order to produce the desired magnetic properties.
- the chosen temperature is of great importance, since in dependence on this, the structure of the material is affected. This can be chosen such that the Heat Treatment ⁇ treatment temperature is below a crystallization temperature of the sheet material for maintaining an amorphous state of the sheet material, or that the nickelbe ⁇ treatment temperature is above a crystallization temperature of the sheet material for transferring the band-shaped Material from an amorphous state into a nanocrystalline state.
- the nanocrystalline state is advantageous for the rolled cores and responsible for the outstanding soft magnetic properties of the produced strip material.
- a low saturation is achieved with high gungsmagnetostritechnik shett Trentspola ⁇ risation by the nanocrystalline structure.
- the proposed heat treatment under defined tensile stress results in a suitable magnetic alloy hysteresis with a central linear part.
- the band-shaped Mate ⁇ material (any) more rapidly solidified magnetic material
- the ⁇ spielmik comprises at least one component from a group amorphous Co, Co-Fe or Co-Ni and / or Fe, Fe-Ni alloys, wherein Were the ⁇ me awarenessstemperatur is the Co, Co-Fe, Co-Ni alloys below a crystallization temperature and at the Fe, Fe-Ni alloys, the heat treatment temperature above the crystallization temperature.
- amorphous Co, Ni and / or Fe based alloys can be used as starting materials.
- an Fe-based alloy can be made
- M stands for one or more of the elements Mo, Ta or Zr, T for ei ⁇ nes or more of the elements V, Mn, Cr, Co or Ni, Z for one or more of the elements C, P or Ge, where for a , b, c, d, x, y, z are:
- This alloy is also preferably cast in the form of a strip and has, at least after the heat treatment, a nanocrystalline structure in which at least 50% by volume of the grains of the microstructure have an average size of less than 100 nm.
- the named alloy preferably also has a hysteresis with a central part, a remanence ratio J r / J s ⁇ 0.1, and a ratio of a coercive field strength H s to an anisotropy field strength H A ⁇ 10%.
- the latter alloy may be free of niobium and / or copper.
- the determination of the at least one magnetic measured variable takes place in real time.
- the band-shaped material or the produced soft-magnetic strips can pass through a production device at full speed without having to interrupt or slow down the process for the determination.
- the at least one magnetic measuring size can sotropiefeidGood from a group consisting of the magnetic saturation flux, the magnetic tape cross-sectional area A Fe, the ANI, the permeability, the Koerzitivfeidstär ⁇ ke and the Remanentshunt of the soft magnetic ⁇ rule strip material produced are selected. All these measurement ⁇ sizes or the associated magnetic properties of strip material produced in common is that they are dependent on an introduced tensile stress in the material and can therefore be correspondingly Gere by means of the method described ⁇ gel.
- Win strip material This combination makes it possible to wind from the strip material produced ring band cores with very precisely adjustable permeability values and simultaneously adjustable core cross-sectional areas A K Fe of the toroidal core by a required strip length can be defined before the actual winding.
- an apparatus for producing soft-magnetic strip material with an input-side material feed for providing strip-shaped material, a heat treatment device for heat-treating the strip-shaped material at a heat treatment temperature, a tensioning device for applying the heat-treated strip-shaped material with a tensile force for generating a tensile stress in a strip longitudinal axis of the strip-shaped material at least in the region of the heat treatment device, wherein the tensioning device can be regulated to vary the tensile force in the strip-shaped material is designed to adjust the tensile stress ⁇ , wherein for generating the soft magnetic strip material, the device also comprises a measuring arrangement for determining at least one magnetic measured variable of the produced soft magnetic strip material and wherein a control unit is provided for controlling the tensioning device, which is formed and with the Messanord ⁇ is connected, that the rules of the tensioning device, a regulation of the tensile force in response to the at least one ⁇ heightened magnetic Mes includes size.
- the apparatus may further a winding unit with Minim ⁇ least a winding mandrel for winding up a defined portion of the soft magnetic strip material produced for generating comprise at least one toroidal tape core, wherein the winding unit is configured and connected to the Messa North ⁇ voltage that the winding in response to the at least a determined measured variable takes place.
- the apparatus may comprise a device for generating at least one magnetic field to act upon the blazebe ⁇ treated material with the at least one generated Mag ⁇ netfeld.
- the magnetic field can be directed to the tape longitudinal axis ⁇ or band surface transversely and / or vertically.
- the clamping device may be configured for generating the tensile force in the band-shaped material such that the band-shaped material can continuously move yet and the tensile force as specified by the Rege ⁇ averaging unit vary based on the ermit ⁇ telten by the measuring arrangement magnetic measurand leaves.
- the tensioning device must have a sufficiently high tensile force in the band-shaped material can initiate and ensure erforder ⁇ Liche accuracy, allow reproducible tension changes, for example, and bring the predetermined tensile force and at a plastic strain of the sheet material up and guarantee.
- the tensioning device for generating the tensile force comprises two S-shaped roller drives coupled to one another, a dancer control and / or a swing control, as well as torque-controlled brake drives and / or mechanically braked
- the covers provided by means of the input-side Materi ⁇ alzu Adjust band-shaped material tailored to a final width and / or band-shaped cast and / or wound to form a coil material.
- a heat treatment apparatus such as a continuous annealing plant is possible.
- the measuring arrangement in one of the banksbe ⁇ treatment device and / or the clamping device successor constricting portion is arranged so that the measuring arrangement continuous soft magnetic strip material produced free from the clamping device provided by the tensile force is.
- the strip material may of course still be a certain tension or tensile force ⁇ .
- a toroidal core is proposed, which comprises a wound soft magnetic strip material, wherein the soft magnetic strip material and / or the core was prepared by the method described above.
- the soft magnetic strip fen ⁇ fenmaterial be coated with an insulating layer. To electrically isolate the windings of the toroidal core from each other.
- the layer may be, for example, a polymer layer or a ceramic layer.
- the tape may be coated with the insulating layer before and / or after being wound up into the ring tape core.
- FIGS. 3a and 3b basics of tension-induced anisotropy, definition of the mechanical and magnetic terms and in two diagrams the relationship between a tensile stress introduced into a band-shaped material and resulting anisotropy or permeability
- FIG. 6 is a graph showing the comparison of a hysteresis measured at the unwrapped soft magnetic strip material with a hysteresis determined at the wound core, FIG.
- FIG. 7 shows in a diagram the comparison of the respectively achievable permeabilities for a band according to the prior art and for a band produced according to the invention
- FIG. 8 shows a diagram of exemplary exemplar scattering of rolled-strip cores produced according to the invention.
- FIG. 1 schematically shows an exemplary sequence of the method according to the invention for producing soft magnetic strip material for roll-band cores according to a first embodiment.
- the method comprises loading riding provide a sheet material, heat treating the strip-like material at a heat treatment temperature ⁇ structure and subjecting the heat-treated sheet material with a tensile force in a longitudinal direction of the band ⁇ -shaped material to generate a tensile stress in the band-shaped material. These steps are used to generate the soft magnetic strip material from the band-shaped material.
- the method includes determining at least one magnetic measuring size of the soft magnetic strip material produced ⁇ rule, and a pulling force for controlling the input filters of the tension in response to the detected magnetic measurement variable (arrow A).
- the method comprises a step of winding up at least one defined section of the produced soft ⁇ magnetic strip material for producing at least one annular band core subsequent to the step of determining the at least one magnetic measured variable.
- the winding step is controlled in response to the at least one magnetic measurement (arrow B).
- FIG. 2 shows a schematic representation of a device 20 according to the invention for producing soft-magnetic
- the apparatus 20 includes an input-side material feed 21 for loading ⁇ riding provide strip-shaped material, a heat treatment ⁇ device 22 for heat treatment of the sheet material at a heat treatment temperature, a clamping device 24 for subjecting the band-shaped material with a tensile force for providing a tension in a belt longitudinal axis of the strip Material at least in the region of the heat treatment device 22.
- the tensioning device 24 is formed for a variation of the tensile force in the band-shaped material controllable in order to coincidestel len the desired tensile stress for generating the soft magnetic strip material.
- the apparatus 20 further comprises a measuring arrangement 25 for determining at least one magnetic measuring size of erzeug ⁇ th soft magnetic strip material and a regulation ⁇ unit 26 for controlling the tensioning device 24, wherein the control unit 26 is connected and formed so the measuring arrangement 25, that the Rules of the tensioning device
- the clamping device 24 includes a regulating the tractive force in response to the at least ei ⁇ ne magnetic detected measurand.
- the clamping device 24 two interconnected S-shaped roller drives as well as a dancer control comprises.
- the roller drives may additionally or alternatively also have different speeds, wherein the first in the direction of movement of the belt drive a may have slightly lower drive speed than the subsequent roller drive, which then an additional tensile force between the two roller drives can be generated.
- the first roll can also be braked instead of being driven.
- the dancer control can also serve to compensate for speed fluctuations in addition to the generation of traction power.
- a swing control can be provided.
- the device 20 comprises a device 23 for generating at least one magnetic field for applying the heat-treated strip material with the at least one Mag ⁇ netfeld and / or a winding unit 27 with a plurality of winding ⁇ thorns 28 for winding each of a defined portion of the soft magnetic strip material produced for generating a Number of annular band cores, wherein the winding unit 27 is formed and connected to the measuring arrangement 25, that the winding takes place in response to the at least one determined measured variable.
- the winding unit 27 comprises an additional S-shaped roller drive 29 for feeding the strip material to the respective winding mandrel 28.
- Fig. 3a and 3b show a correlation between in a tape-like material 30 by means of a tensile force F a tensile stress and a resulting ⁇ directed anisotropy Ku or permeability ⁇ .
- a locally prevailing in the tape-shaped mate rial ⁇ 30 o tensile stress resulting from the anlie ⁇ constricting tensile force F and a local magnetic cross-sectional area
- a Fe (Material section) to:
- a permeability ⁇ is determined by the applied tensile Voltage ⁇ is set and, as is known, results from the mean slope of the hysteresis loop or from a magnetic flux density B s (saturation magnetization) or a magnetic field strength H (anisotropic field strength H a ) and a magnetic field constant ⁇ in conjunction with the anisotropy K 0 follows: So is, for example due to manufacturing a fluctuate ⁇ de thickness of the sheet material before, so varies entspre ⁇ accordingly assuming a constant width, the local cross-sectional area A FE and with it at constant tension F the applied tensile stress o.
- FIG. 3b also shows a curve of the permeability in dependence on the tensile stress from ⁇ o for three heat treatment ⁇ temperatures.
- Fig. 4 shows a detail of an example of the thickness of the strip-shaped material 30 of FIG. 3, in wel ⁇ chem local influences in the band-shaped material be ⁇ noticeable.
- In tervalls ⁇ 1 200m strip thickness jumps are represented which through a production process, such as a rapid solidification technology used for this purpose (with any suitable overall material) are caused.
- ⁇ as local variations of strip thickness occur and are attributable to the Pro ⁇ dumies vide. These are moving in the 1 to 2 ym, but can usually be over 3 to 4 ym and thus significant jumps in a thickness profile of the strip-shaped material be ⁇ act, which is used as starting material for the method described.
- FIG. 5 again shows the course of the thickness of the strip-shaped material shown in FIG. 4.
- a FE i of the strip-shaped material results than a second local cross-sectional area A FE 2 in the adjacent right area II with a smaller strip thickness.
- This has the consequence that a local tensile stress Oi in the case of a constant tensile force in the left region I is correspondingly lower than in the right region II (02).
- FIG. 6 shows a comparison of a hysteresis 60 measured on the unwrapped soft magnetic strip material and a hysteresis 61 determined on the wound core.
- the heat treatment temperature and a throughput should be adjusted depending on a selected material or a selected alloy such that a magnetostriction in a nanocrystalline state of the strip material is close to zero.
- the product of bending stresses due of take-up of the strip material and the value of magnetostriction is an additional indu ⁇ ed in the wound strip material anisotropy and should therefore be kept to a minimum overall. Otherwise, the permeability of the core would be more or less different from that of the unwrapped strip material.
- a permeability ⁇ is in a range of 1000. This corresponds to a small to medium-induced induced anisotropy. Except for small defects in a range of A ⁇ muzzle in a magnetic saturation, the two can
- Strip material 60 and the wound roll core 61 are considered identical.
- Deviates achieved by a ⁇ meabiltician particular in the region II significantly from a target value Z from (in the present example ⁇ 1000), when the control according to the invention is not used (curve A). If, on the other hand, the control according to the invention is used (curve B), the permeability ⁇ achieved, in spite of the
- FIG. 8 shows by way of example a number of measuring points 80 of roller conveyor cores, which are produced by means of the method according to the invention.
- the band-shaped material used is VP800 tape material with a width of 6.2 mm.
- a permeability of ⁇ a Sollpermeabilticianswert 800 and held with ⁇ means of the inventive regulation of the pulling force, a tensile stress almost constant over several hundred meters of strip-shaped material ⁇ .
- Each of the cores from this wound roll band is produced with a pre-defined core cross section area A ⁇ K Fe of 13mm.
- the per band used core length is thus about 8m.
- this value varies as a function of the local strip thickness (or local cross- sectional area A Fe ), in order to achieve the respectively predefined predefined core cross-sectional area A K Fe. It is accordingly thus gangs wound under the controlled Aufwickelvor- depending on the local strip thickness more or less strip material to a core until the predefined core ⁇ cross-sectional area A K Fe is reached.
- An associated mean core cross- sectional area A K Fe is 13.01 mm 2 and thus has a deviation of only 0.25% compared to the desired value.
- a lower band length is therefore for the production of the individual core by means of the inventive method erfor ⁇ sary so that material can be saved in this manner, whereby a weight and expense of the core can be reduced beyond. Accordingly, a rejection of defective cores, which are outside of a given specification, such as due to large dimensions or too high a resulting weight, can be reduced.
- FIGS. 6, 7 and 8 were carried out with VITROPERM 800 as starting material with a composition of Fe Res tCui b3Sii.5.5B6.6.
- the belt-shaped material had a belt width of 6.2 mm at a nominal belt thickness of 19 ⁇ m.
- the heat treatment was carried out in a heat treatment furnace with a length of 3 m at a heat treatment temperature of 650 ° C and a heat treatment time in the
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Abstract
Description
Claims
Priority Applications (5)
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PCT/DE2012/200027 WO2013156010A1 (de) | 2012-04-16 | 2012-04-16 | Verfahren und vorrichtung zum herstellen von weichmagnetischem streifenmaterial für ringbandkerne |
CN201280072289.7A CN104662623B (zh) | 2012-04-16 | 2012-04-16 | 生产用于环带芯的软磁条状材料的方法和装置以及环带芯 |
DE112012006230.2T DE112012006230A5 (de) | 2012-04-16 | 2012-04-16 | Verfahren und Vorrichtung zum Herstellen von weichmagnetischem Streifenmaterial für Ringbandkerne |
US14/394,582 US10580571B2 (en) | 2012-04-16 | 2012-04-16 | Method and device for producing soft magnetic strip material for strip ring cores |
US16/781,142 US20200185151A1 (en) | 2012-04-16 | 2020-02-04 | Method and device for producing soft magnetic strip material for strip ring cores |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/DE2012/200027 WO2013156010A1 (de) | 2012-04-16 | 2012-04-16 | Verfahren und vorrichtung zum herstellen von weichmagnetischem streifenmaterial für ringbandkerne |
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US14/394,582 A-371-Of-International US10580571B2 (en) | 2012-04-16 | 2012-04-16 | Method and device for producing soft magnetic strip material for strip ring cores |
US16/781,142 Continuation US20200185151A1 (en) | 2012-04-16 | 2020-02-04 | Method and device for producing soft magnetic strip material for strip ring cores |
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WO2013156010A1 true WO2013156010A1 (de) | 2013-10-24 |
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US (2) | US10580571B2 (de) |
CN (1) | CN104662623B (de) |
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Cited By (2)
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DE102015102765A1 (de) | 2015-02-26 | 2016-09-01 | Vacuumschmelze Gmbh & Co. Kg | Fördersystem zum Spannen für ein Nachbehandeln eines rascherstarrten Metallbandes und Nachbehandlungsverfahren |
DE102021121345A1 (de) | 2021-08-17 | 2023-02-23 | Vacuumschmelze Gmbh & Co. Kg | Legierung und Verfahren zum Herstellen eines nanokristallinen Metallbandes |
Families Citing this family (4)
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CN105648158B (zh) * | 2016-01-14 | 2018-02-16 | 浙江师范大学 | 一种提高非晶合金软磁材料磁性能的装置及方法 |
CN107240491B (zh) * | 2017-08-13 | 2019-03-26 | 芜湖希又智能科技有限公司 | 一种纳米晶合金双磁芯电流互感器 |
CN109559883B (zh) * | 2018-12-26 | 2021-01-15 | 江西大有科技有限公司 | 高低温度稳定性软磁合金铁芯的制备方法 |
CN112071621B (zh) * | 2020-09-09 | 2022-08-16 | 德清鑫晨新材料有限公司 | 一种直流叠加特性高的铁硅合金磁粉芯材料的制造设备 |
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DE102015102765A1 (de) | 2015-02-26 | 2016-09-01 | Vacuumschmelze Gmbh & Co. Kg | Fördersystem zum Spannen für ein Nachbehandeln eines rascherstarrten Metallbandes und Nachbehandlungsverfahren |
DE102015102765B4 (de) | 2015-02-26 | 2018-05-17 | Vacuumschmelze Gmbh & Co. Kg | Fördersystem zum Spannen für ein Nachbehandeln eines rascherstarrten Metallbandes und Nachbehandlungsverfahren |
US10538822B2 (en) | 2015-02-26 | 2020-01-21 | Vacuumschmelze Gmbh & Co. Kg | Conveyance system for tensioning in order to post-treat a rapidly-solidified metal strip, and post-treatment method |
US11085094B2 (en) | 2015-02-26 | 2021-08-10 | Vacuumschmelze Gmbh & Co. Kg | Conveyance system for tensioning in order to post-treat a rapidly-solidified metal strip, and post-treatment method |
DE102021121345A1 (de) | 2021-08-17 | 2023-02-23 | Vacuumschmelze Gmbh & Co. Kg | Legierung und Verfahren zum Herstellen eines nanokristallinen Metallbandes |
Also Published As
Publication number | Publication date |
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US20150243435A1 (en) | 2015-08-27 |
US10580571B2 (en) | 2020-03-03 |
CN104662623B (zh) | 2017-05-17 |
CN104662623A (zh) | 2015-05-27 |
US20200185151A1 (en) | 2020-06-11 |
DE112012006230A5 (de) | 2015-01-22 |
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