EP1129459A1 - Magnetkern, der zum einsatz in einem stromwandler geeignet ist, verfahren zur herstellung eines magnetkerns und stromwandler mit einem magnetkern - Google Patents
Magnetkern, der zum einsatz in einem stromwandler geeignet ist, verfahren zur herstellung eines magnetkerns und stromwandler mit einem magnetkernInfo
- Publication number
- EP1129459A1 EP1129459A1 EP99963240A EP99963240A EP1129459A1 EP 1129459 A1 EP1129459 A1 EP 1129459A1 EP 99963240 A EP99963240 A EP 99963240A EP 99963240 A EP99963240 A EP 99963240A EP 1129459 A1 EP1129459 A1 EP 1129459A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic core
- current transformer
- magnetic
- saturation
- current
- 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
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- 239000000956 alloy Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 230000005415 magnetization Effects 0.000 claims abstract description 9
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 4
- 230000035699 permeability Effects 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 16
- 238000007654 immersion Methods 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 229910016955 Fe1-xMnx Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000006698 induction Effects 0.000 description 10
- 239000011572 manganese Substances 0.000 description 10
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
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- 150000002738 metalloids Chemical class 0.000 description 6
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- 230000008569 process Effects 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
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- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 2
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 244000080575 Oxalis tetraphylla Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000007712 rapid solidification Methods 0.000 description 1
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- 150000004760 silicates Chemical class 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
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- 230000003746 surface roughness Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
Definitions
- Magnetic core suitable for use in a current transformer, method for producing a magnetic core and current transformer with a magnetic core is provided.
- the invention relates to a magnetic core which is suitable for use in a current transformer, a method for producing such a magnetic core and a current transformer with such a magnetic core.
- Energy metering via the rotation of a disk connected to a mechanical counter, which is driven by the fields of corresponding field coils that are proportional to the current or voltage.
- electronic energy meters are used, in which the current and voltage are recorded via inductive current and voltage converters.
- a special application in which particularly high accuracy is required is the detection of energy flows in the area of electricity supply companies.
- the amounts of energy generated by the respective power plants and fed into the high-voltage grids must be precisely determined, on the other hand, the changing proportions of consumption or delivery in traffic between the energy supply companies are of great importance for billing.
- the energy meters used for this are
- Multifunction built-in devices their input signals for current and voltage from the respective high and Medium voltage systems can be tapped via cascades of current and voltage transformers and their output signals are used for digital and graphic registration or display as well as for control purposes in the control rooms.
- the first converters on the network side are used for electrically isolated transformation of the high current and. Voltage values, for example 1 to 100 kA and 10 to 500 kV, to values that can be handled in control cabinets, the second transform them in the actual energy meter to the signal levels required by the measuring electronics in the range of less than 10 to 100 mV.
- FIG. 1 shows an equivalent circuit diagram of such a current transformer and the areas of the technical data that can occur in various applications.
- a current transformer 1 is shown here.
- the primary winding 2, which carries the current Ip r i m and a secondary winding 3, which carries the measuring current I sec is located on a magnetic core 4, which is composed of an amorphous soft magnetic tape.
- the secondary current I sec automatically adjusts itself so that the primary and secondary ampere turns are ideally of the same size and oppositely directed.
- the course of the magnetic fields in such a current transformer is shown in FIG. 2, losses in the magnetic core not being taken into account.
- the current in the secondary winding 3 then adjusts itself according to the law of induction in such a way that it tries to prevent the cause of its formation, namely the change in the magnetic flux in the magnetic core 4 over time.
- the secondary current therefore has an amplitude error and a phase error compared to the above idealization, which is described by equation (2):
- Air-sheared (sheared) ferrite shell core is used as the magnetic core.
- These current transformers have a very good linearity, however, due to the relatively low permeability of the ferrites, a very high number of turns in connection with a very large-volume magnetic core is required in order to achieve a low phase angle with the current transformer.
- These current transformers based on ferrite shell cores also have a high sensitivity to external external fields, so that shielding measures must also be taken there.
- the invention is based on the object of specifying a magnetic core which, when used in a current transformer, permits a higher measuring accuracy of a current to be measured compared to the prior art. Furthermore, a method for producing such a magnetic core and a current transformer with such a magnetic core are to be specified.
- the task is solved by a magnetic core which is used for
- the magnetic core has a magnetic anisotropy axis, along which the magnetization of the magnetic core aligns particularly easily and which is perpendicular to a plane with which a center line of the strip runs, ie which runs perpendicular to the direction of the wound strip.
- the alloy has a composition consisting essentially of the formula
- X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge, P, a to gm atomic% are given and where a, b, c, d, e, f, g and x meet the following conditions:
- the permeability relates to an applied field strength, which lies m of the plane, m the center line of the band, and the induction caused thereby.
- Amplitude error of a current transformer with such a magnetic core is very small.
- the absolute amplitude error can be less than 1%.
- the absolute phase error can be less than 0.1 °.
- the current transformer has at least one primary winding and one secondary winding, to which a load resistor is connected in parallel and which terminates the secondary circuit with low resistance.
- the small saturation magnetostriction and the alignment of the anisotropy axis have a particularly advantageous effect on the high linearity of the hysteresis loop.
- phase and amplitude errors are essentially independent of the current to be measured.
- the current transformer can carry out a very exact current detection.
- the invention is based on the finding that a magnetic core with the described properties can be produced with the alloy of the described composition by means of a suitable heat treatment. Many parameters are matched to each other so that the magnetic core has the properties described.
- a heat treatment which is a method for producing a magnetic core and also solves the task:
- the magnetic core After production and winding of the tape to the magnetic core, the magnetic core is brought to a target temperature
- the magnetic core is cooled from the target temperature to room temperature, a magnetic field H> 100 A / cm, better> 1000 A / cm being switched on at the latest from the Curie temperature of the alloy, which is parallel to the anisotropy axis of the magnetic core to be generated.
- the Curie temperature T c is the temperature at which spontaneous magnetization of the alloy begins.
- cooling takes place at rates between 0.1 and 10 K / min.
- the temperature-time profile can be stationary, non-linear, steady or discontinuous.
- the cooling time can be between 0.25 and 60 hours.
- the target temperature is chosen so that it is below the crystallization temperature of the alloy.
- the target temperature is preferably at least 100 ° C. below the crystallization temperature of the alloy.
- the target temperature is chosen so that a very small saturation agnetostriction is achieved with the alloys described.
- the target temperature required for this depends on the ratio of Fe, Mn to Co. The larger this ratio, the smaller the target temperature is chosen in order to obtain the smallest possible saturation magnetostriction.
- the heating simultaneously compensates for mechanical stresses and a small saturation magnetostriction.
- a particularly high linearity of the hysteresis loop can be achieved if the ratio of the mechanical elastic tension tensor of the magnetic core multiplied by the saturation magnetostriction to the uniaxial anisotropy is less than 0.5.
- the alignment processes taking place in the magnetic field depend on the temperature in two ways. The higher the temperature, the more mobile the atomic and the easier it is to align. The lower the temperature, the greater the driving force of the magnetic field on the magnetic dipole moments of the atomic areas, that is, the stronger the aligning force that acts on the atomic areas. These factors have been optimally coordinated with one another by the cooling time described, so that an anisotropy which is sufficiently high for good linearity is achieved with a high permeability.
- the magnetic field is chosen such that the
- the composition of the alloy is selected such that the Curie temperature, taking into account other parameters to be optimized, e.g. a high saturation induction, is as small as possible
- the Curie temperature is, for example, between 190 ° C.
- the saturation induction of the magnetic core is as large as possible. This is advantageous since, in the case of large saturation induction, the linearity range is expanded and thus a higher current can be measured reliably before saturation is reached and the linearity of the current mapping is thereby destroyed.
- the saturation induction is over the greater the ratio of Co, Fe, Mn to the rest of the alloy. At the same time, the crystallization temperature decreases.
- the current transformer can have a particularly small volume with precise current detection.
- X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge and P, a to g are given in atomic% and where a, b, c, d, e, f, g and x meet the following conditions:
- the above-mentioned alloy systems are characterized by very linear, extremely narrow hysteresis loops, with a permeability ⁇ 4> 120,000 at a field amplitude H of 4 mA / cm being easily adjustable using the described method.
- the alloy systems according to the invention are almost free of magnetostriction.
- the magnetostriction which becomes more negative as the metalloid content decreases, must then be adjusted again via the Fe content to such an extent that the zero crossing can finally be reached by the target temperature.
- a saturation magnetostriction can be achieved, the amount of which is less than 0.1 or even 0.05 ppm. Due to the small saturation magnetostriction, the storanisotropy which competes with uniaxial anisotropy is particularly small. In this way, a good linearity of the hysteresis loop can be achieved even with small uniaxial anisotropies, which are a prerequisite for high permeability.
- the magnetic core preferably has no air gap.
- a current transformer with a magnetic core without an air gap has a particularly high immunity to external magnetic fields without additional shielding measures.
- the magnetic core is, for example, a closed, air-gap-free ring core, oval core or rectangular core. Assigns the band as in the case of the toroid
- Rotational symmetry axis the anisotropy axis is parallel to the rotational symmetry axis.
- a thickness d ⁇ 26 ⁇ m has proven to be a favorable range for the band thickness of the band.
- a band thickness d> 15 ⁇ m has been found.
- the surface-related proportion of the storanisotropies can be surprisingly greatly reduced as a result.
- the tape is provided with an electrically insulating layer on at least one surface.
- the electrically insulating layer on at least one of its two surfaces before winding.
- a dip, continuous, spray or electrolysis process is used for this.
- the wound magnetic core is subjected to immersion insulation before being heated to the target temperature, so that the tape is provided with the electrically insulating layer.
- An immersion process under negative pressure has proven to be particularly advantageous.
- oxides, acrylates, phosphates, silicates and chromates of the elements calcium, magnesium, aluminum, titanium, zirconium, hafnium, silicon have proven to be effective and contractual insulators.
- Magnesium is particularly effective here, which is applied to the strip surface as a liquid magnesium-containing precursor and during a special process that does not influence the alloy
- Heat treatment m converts a dense layer containing magnesium, whose thickness D can be between 25 nm and 3 ⁇ m.
- the actual insulator layer made of magnesium oxide is then formed at the temperatures of the magnetic field heat treatment described above.
- the secondary winding of the current transformer can have a number of windings which is less than or equal to 2200.
- the primary winding of the current transformer can have a number of turns equal to three.
- the current transformer can be designed for a primary current that is less than or equal to 20A. Heating to the target temperature takes place as quickly as possible. For example, heating to the target temperature occurs at a rate between 1 to 15 K / mm.
- the magnetic core is held at the target temperature for between 0.25 and 4 hours in order to achieve the best possible balance of the mechanical stresses.
- the cooling between the relaxation temperature and the Curie temperature also takes place as quickly as possible, e.g. with rates of 0.5 - 10 K / mm.
- the cooling rate regulates the proportion of the free volume and thus the atomic
- Alignment capability which is available at lower temperatures for setting the anisotropy.
- the applied field which is perpendicular to the direction of the strip, is cooled with 0.1 - 5 K / mm. This cooling rate is chosen so that a uniaxial anisotropy of the desired size is produced by the atomic reorientation under the driving force of the magnetic field. Since this uniaxial anisotropy is reciprocal to permeability, high permeability can be set with high cooling rates.
- amorphous band is first produced from a melt using the rapid solidification technology known per se, which is described, for example, in DE 37 31 781 Cl.
- the amorphous alloy strip is then wound tension-free to the magnetic core.
- the procedure is preferably such that the strip has a low surface roughness.
- the heat treatment is carried out in such a way that the value of the saturation magnetostriction ⁇ s changes during the heat treatment by an amount m positive direction depending on the alloy composition, until it changes in the range ⁇ s
- This value can also be achieved if the amount of ⁇ s in the "as quenched" state of the strip, that is to say directly after the casting process, is clearly above this value.
- the magnetic core can be flushed with a reducing or at least passive protective gas, so that no oxidations or other reactions can occur on the surface of the strip, apart from the self-passivating and at the same time electrically insulating, extremely thin metalloid oxide layers that are permissible in certain cases .
- the magnetic core treated in this way is finally solidified, e.g. provided by drinking, coating, encasing with suitable plastic materials and / or encapsulation and in each case with at least the secondary winding of the current transformer.
- FIG. 3 shows schematically the course of a heat treatment of a magnetic core.
- FIG. 4 shows the dependencies of the permeabilities of the magnetic core and the permeabilities of permalloy cores on an induction amplitude, which is caused by an exciting
- FIG. 5 shows the dependence of the amplitude error and the phase error on the current to be measured (primary current).
- Figure 6 shows schematically the magnetic core, which consists of a tape with an insulating layer, and its anisotropy axis.
- FIG. 6 is not to scale and shows only a few turns for the sake of clarity.
- the magnetic core M which consisted of a tape B coated with an approximately 250 nm thick insulating layer S made of magnesium oxide, was subjected to the heat treatment shown in FIG.
- the magnetic core M was heated at a rate of approximately 420 K / h to a target temperature of approximately 458 ° C. within one hour and held there for approximately 1.5 hours.
- the cooling at the rate of 60 K / h took place in a transverse magnetic field which was parallel to an axis of rotational symmetry of the magnetic core M.
- An anisotropy axis A parallel to the magnetic field was formed along which the magnetization of the magnetic core M aligns itself particularly easily (see FIG. 6).
- FIG. 4 shows the modulation dependency of the permeability of conventional permalloy alloys.
- phase errors ⁇ and amplitude errors F measured after winding on the described current transformer are shown in FIG. 5.
- the comparison to conventional permalloy alloys shows the advantages of current transformers made of magnetostriction-free, highly permeable amorphous cores.
- the current transformer had an average phase error ⁇ of 0.19 ° and an linearity of the phase angle ⁇ over a current range of 0.1 to 2 A of less than 0.02 °.
- the permeability of this amorphous heat-treated ferromagnetic alloy is 192000 at a field amplitude H of 4 mA / cm.
- the target temperature was increased to 510 ° C. with the intention of even better relaxation.
- the highly non-linear hysteresis loop that subsequently occurred had an initial permeability of only 9,400 due to strong interference anisotropies due to the onset of crystallization.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19852423 | 1998-11-13 | ||
DE19852423 | 1998-11-13 | ||
PCT/DE1999/003630 WO2000030131A1 (de) | 1998-11-13 | 1999-11-15 | Magnetkern, der zum einsatz in einem stromwandler geeignet ist, verfahren zur herstellung eines magnetkerns und stromwandler mit einem magnetkern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1129459A1 true EP1129459A1 (de) | 2001-09-05 |
EP1129459B1 EP1129459B1 (de) | 2004-06-02 |
Family
ID=7887720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99963240A Expired - Lifetime EP1129459B1 (de) | 1998-11-13 | 1999-11-15 | Verwendung eines magnetkerns für einen stromwandler, verfahren zur herstellung eines magnetkerns und stromwandler mit einem magnetkern |
Country Status (6)
Country | Link |
---|---|
US (1) | US6580347B1 (de) |
EP (1) | EP1129459B1 (de) |
JP (1) | JP2002530853A (de) |
KR (1) | KR100606514B1 (de) |
DE (1) | DE59909661D1 (de) |
WO (1) | WO2000030131A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008051561A1 (de) | 2008-10-14 | 2010-05-06 | Vacuumschmelze Gmbh & Co. Kg | Verfahren zum Herstellen einer Stromerfassungseinrichtung |
EP2343715A1 (de) | 2010-01-08 | 2011-07-13 | Vaccumschmelze Gmbh & Co. KG | Verfahren zum Herstellen einer Stromerfassungseinrichtung |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6844799B2 (en) * | 2001-04-10 | 2005-01-18 | General Electric Company | Compact low cost current sensor and current transformer core having improved dynamic range |
US6992555B2 (en) * | 2003-01-30 | 2006-01-31 | Metglas, Inc. | Gapped amorphous metal-based magnetic core |
WO2004088681A2 (de) | 2003-04-02 | 2004-10-14 | Vacuumschmelze Gmbh & Co. Kg | Magnetkern, verfahren zur herstellung eines solchen magnetkerns, anwendungen eines solchen magnetkerns insbesondere bei stromtransformatoren und stromkompensierten drosseln sowie legierungen und bänder zur herstellung eines solchen magnetkerns |
DE102004024337A1 (de) * | 2004-05-17 | 2005-12-22 | Vacuumschmelze Gmbh & Co. Kg | Verfahren zur Herstellung nanokristalliner Stromwandlerkerne, nach diesem Verfahren hergestellte Magnetkerne sowie Stromwandler mit denselben |
JP4917972B2 (ja) * | 2007-06-13 | 2012-04-18 | 株式会社巧電社 | 電池レス化用誘導コイルの取付方法 |
JP5700328B2 (ja) * | 2010-04-26 | 2015-04-15 | セイコーエプソン株式会社 | Co基金属ガラス合金、磁心、電磁変換機および時計 |
KR101966749B1 (ko) * | 2015-12-11 | 2019-04-08 | 주식회사 아모그린텍 | 자기차폐형 변류기 |
JP6790405B2 (ja) * | 2016-03-25 | 2020-11-25 | 中国電力株式会社 | 電流検出用センサ及び地絡点標定システム |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US505619A (en) | 1893-09-26 | Liams | ||
DE2824749A1 (de) | 1978-06-06 | 1979-12-13 | Vacuumschmelze Gmbh | Induktives bauelement und verfahren zu seiner herstellung |
DE3049906A1 (en) | 1979-09-21 | 1982-03-18 | Hitachi Ltd | Amorphous alloys |
US4451876A (en) * | 1981-06-19 | 1984-05-29 | Hitachi Metals, Ltd. | Switching regulator |
JPS6039160B2 (ja) * | 1982-07-22 | 1985-09-04 | 新日本製鐵株式会社 | 絶縁性、耐食性の優れた磁性アモルフアス合金材料 |
JPS59198708A (ja) | 1983-04-25 | 1984-11-10 | Hitachi Metals Ltd | チヨ−クコイル用磁心 |
JPS61292301A (ja) | 1985-06-20 | 1986-12-23 | Hitachi Metals Ltd | 巻磁心 |
JPS61295601A (ja) | 1985-06-25 | 1986-12-26 | Hitachi Metals Ltd | コモンモ−ドチヨ−ク用アモルフアス磁心 |
JPS62124703A (ja) | 1985-11-25 | 1987-06-06 | Mitsui Petrochem Ind Ltd | 電流センサ |
EP0240600B1 (de) * | 1986-01-08 | 1992-05-13 | AlliedSignal Inc. | Glasartige Legierungen mit Perminvar-Eigenschaften |
DE3731781C2 (de) | 1987-09-22 | 1996-07-11 | Vacuumschmelze Gmbh | Vorrichtung zum Herstellen eines bandförmigen Metallstranges |
JPH02167478A (ja) | 1988-09-22 | 1990-06-27 | Toshiba Corp | 電流センサ |
EP0637038B1 (de) * | 1993-07-30 | 1998-03-11 | Hitachi Metals, Ltd. | Magnetkern für Impulsübertrager und Impulsübertrager |
JP2698769B2 (ja) | 1995-02-17 | 1998-01-19 | 株式会社東芝 | 高透磁率磁心の製造方法 |
FR2755292B1 (fr) * | 1996-10-25 | 1998-11-20 | Mecagis | Procede de fabrication d'un noyau magnetique en materiau magnetique doux nanocristallin |
DE19653428C1 (de) * | 1996-12-20 | 1998-03-26 | Vacuumschmelze Gmbh | Verfahren zum Herstellen von Bandkernbändern sowie induktives Bauelement mit Bandkern |
WO2000017897A1 (de) * | 1998-09-17 | 2000-03-30 | Vacuumschmelze Gmbh | Stromwandler mit gleichstromtoleranz |
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1999
- 1999-11-15 EP EP99963240A patent/EP1129459B1/de not_active Expired - Lifetime
- 1999-11-15 KR KR1020017006032A patent/KR100606514B1/ko active IP Right Grant
- 1999-11-15 DE DE59909661T patent/DE59909661D1/de not_active Expired - Lifetime
- 1999-11-15 WO PCT/DE1999/003630 patent/WO2000030131A1/de active IP Right Grant
- 1999-11-15 JP JP2000583052A patent/JP2002530853A/ja active Pending
- 1999-11-15 US US09/831,717 patent/US6580347B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008051561A1 (de) | 2008-10-14 | 2010-05-06 | Vacuumschmelze Gmbh & Co. Kg | Verfahren zum Herstellen einer Stromerfassungseinrichtung |
EP2343715A1 (de) | 2010-01-08 | 2011-07-13 | Vaccumschmelze Gmbh & Co. KG | Verfahren zum Herstellen einer Stromerfassungseinrichtung |
DE102010004223A1 (de) | 2010-01-08 | 2011-07-14 | Vacuumschmelze GmbH & Co. KG, 63450 | Verfahren zum Herstellen einer Stromerfassungseinrichtung |
US8813355B2 (en) | 2010-01-08 | 2014-08-26 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current metering device |
Also Published As
Publication number | Publication date |
---|---|
JP2002530853A (ja) | 2002-09-17 |
EP1129459B1 (de) | 2004-06-02 |
US6580347B1 (en) | 2003-06-17 |
WO2000030131A1 (de) | 2000-05-25 |
KR100606514B1 (ko) | 2006-07-31 |
DE59909661D1 (de) | 2004-07-08 |
KR20010080442A (ko) | 2001-08-22 |
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