EP1114429A1 - Transformateur de courant a tolerance vis-a-vis du courant continu - Google Patents

Transformateur de courant a tolerance vis-a-vis du courant continu

Info

Publication number
EP1114429A1
EP1114429A1 EP99969529A EP99969529A EP1114429A1 EP 1114429 A1 EP1114429 A1 EP 1114429A1 EP 99969529 A EP99969529 A EP 99969529A EP 99969529 A EP99969529 A EP 99969529A EP 1114429 A1 EP1114429 A1 EP 1114429A1
Authority
EP
European Patent Office
Prior art keywords
current
current transformer
core
transformer according
permeability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99969529A
Other languages
German (de)
English (en)
Other versions
EP1114429B1 (fr
Inventor
Detlef Otte
Jörg PETZOLD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of EP1114429A1 publication Critical patent/EP1114429A1/fr
Application granted granted Critical
Publication of EP1114429B1 publication Critical patent/EP1114429B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles

Definitions

  • the invention relates to a current converter for alternating current, in particular mains alternating current, with direct current components, consisting of at least one converter core with a primary winding and at least one secondary winding, to which a burden resistor is connected in parallel and terminates a secondary circuit with low resistance.
  • Energy meters are used to record the energy consumption of electrical devices and systems in industry and households.
  • the oldest principle used is that of the Ferraris meter.
  • the Ferraris meter is based on the energy counting via the rotation of a disk connected to a mechanical counter, which is driven by the field or current-proportional fields of corresponding field coils.
  • electronic energy meters are used, in which the current and voltage detection is carried out via inductive current and voltage transformers.
  • the output signals of these converters are digitized, multiplied in phase, integrated and stored. The result is an electrical quantity that is available for remote reading, among other things.
  • the compensation range is limited to a phase error of 5 °. In design, this means that the highest transferable effective value has to be oversized. Ratios 3 - 4: 1 occur. This leads to very poor material utilization and thus to very high manufacturing costs.
  • the object of the present invention is therefore to design a current transformer for alternating current with direct current components of the type mentioned at the outset in such a way that it has a high modulation capability with alternating current and direct current components.
  • a current converter for alternating current with direct current components consisting of at least one converter core with a primary winding and at least one ner secondary winding, to which a burden resistor is connected in parallel and terminates the secondary current with low resistance, which is characterized in that
  • a closed, air gap-free ring core made of a band (ring band core) made of an amorphous, ferromagnetic alloy is provided as the converter core,
  • the amorphous ferromagnetic alloy has a magnetostriction value
  • X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge and P, ag are given in atomic% and where a, b, c, d, e, f, g and x are the following Satisfy conditions:
  • Particularly good current transformers can be achieved by using amorphous, ferromagnetic alloys that have a magnetostriction value
  • X is at least one of the elements, V, Nb, Ta, Cr, Mo, W, Ge and P, ag are given in atomic% and where a, b, c, d, e, f, g and x are meet the following conditions:
  • the alloy system according to the invention is almost magnetostriction-free.
  • the magnetostriction is preferably set by a heat treatment, the actual saturation magnetostriction being achieved by fine adjustment of the iron and / or manganese content.
  • the saturation magnetization B s from 0.7 Tesla to 1.2 Tesla is made possible by fine-tuning the nickel and glass former content.
  • Glass former here means X, silicon, boron and carbon.
  • Alloys in which the parameters a + b + c> 77 are set to c ⁇ 20 have proven to be particularly suitable in the amorphous, ferromagnetic cobalt-based alloy system according to the invention. This makes it easy to Magnetization B s of 0.85 Tesla or higher can be achieved.
  • the permeability of less than 1400 is based on the physical connection that the permeability ⁇ is inversely proportional to the uniaxial anisotropy K u .
  • the uniaxial anisotropy K u can be adjusted by heat treatment in a transverse magnetic field.
  • the nickel content has a particularly strong influence on the uniaxial anisotropy K u .
  • a thickness d ⁇ 30 ⁇ m, preferably d ⁇ 26 ⁇ m, has proven to be a favorable range of the band thickness of the ring band core.
  • the band of the ring band core has an electrically insulating layer at least on one surface.
  • the entire toroid has an electrically insulating layer.
  • the alloys according to the invention have oxides, acrylates, phosphates, silicates and chromates of the elements calcium, magnesium, aluminum, titanium, zirconium, hafnium and silicon as particularly effective and compatible electrically insulating media.
  • Magnesia oxide is particularly effective and economical. It can be applied to the strip surface as a liquid magnesium-containing preliminary product and converts to a dense magnesium-containing layer during a special heat treatment that does not influence the alloy.
  • the thickness D is between 25 nm and 400 run . The actual heat treatment in the transverse magnetic field then creates a well-adhering, chemically inert, electrically insulating magnesium oxide layer.
  • FIG. 1 shows an equivalent circuit diagram of a current transformer and the areas of the technical data, as can occur in various applications
  • FIG. 2 magnetic fields in the current transformer without taking into account core losses
  • FIG. 3 shows an oscillogram of the secondary current of a current transformer with half-wave rectified primary current
  • FIG. 4 the permeability as a function of the induction amplitude
  • FIG. 5 shows the change in permeability as a function of temperature
  • FIG. 6 shows the change in permeability as a function of an aging period of alloys according to the invention
  • FIG. 7 shows a diagram with a possible temperature control during the heat treatment
  • FIG. 8 shows a section through the surface of a body whose roughness depth is to be determined.
  • FIG. 1 shows the basic circuit of a current transformer 1.
  • the secondary current i se k automatically adjusts itself so that the ampere turns primary and secondary are ideally of the same size and directed in opposite directions.
  • 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 converter 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): really ideal
  • An important area of application for current transformers is electronic energy meters in low-voltage AC networks with a network frequency of 50 or 60 Hertz.
  • the evaluation electronics in such counters form the product of current and voltage at any time and use them to calculate the electrical power or energy consumption.
  • phase error of the current transformer is particularly critical in the energy metering. For this reason, it is important to either achieve a phase error as low as possible, typically a phase error ⁇ ⁇ 0.2 °, or to achieve a higher phase error that is as constant as possible over the current measuring range and thus easily compensable.
  • the losses in the converter core 4 must also be taken into account.
  • the core losses are dependent on the material properties of the converter core 4, i. H. for ring band cores made of the material, the band thickness and other parameters. They can be described by a second phase angle ⁇ .
  • the second phase angle ⁇ corresponds to the phase shift between B and H in the converter core 4 due to the core losses.
  • a so-called DC tolerance is very often required for electrical energy meters that are used for billing purposes in the household sector. This is not a real direct current, but an asymmetrical alternating current, as it is e.g. B. can be caused by a diode in the consumer circuit.
  • the international standard IEC1036 requires the functionality of the electricity meter, albeit with limited accuracy, even with fully half-wave rectified alternating current. This corresponds to a situation in which the entire primary current is conducted via a diode.
  • FIG. 3 shows an oscillogram of the primary current, the secondary current of a current transformer and the flux density B in a transformer core for a half-wave rectified primary current.
  • the flux density B in the converter increases step-wise with each half-wave until the converter core saturates.
  • converter cores made of at least 70% amorphous, ferromagnetic, almost magnetostriction-free cobalt base alloys. These cobalt-based alloys have a flat, almost linear B-H loop with a permeability ⁇ ⁇ 1400.
  • the converter cores are preferably designed as closed, air-gap-free toroidal cores in an oval or rectangular shape.
  • the amorphous, ferromagnetic cobalt-based alloys shown in Table 1 were first produced as an amorphous band from a melt using the rapid solidification technology known per se.
  • the rapid starter technology is described in detail, for example, in DE 37 31 781 Cl.
  • the band which had a thickness of approximately 20 ⁇ m, was then wound without tension into a ring band core.
  • the setting of the linear, flat BH loop essential to the invention was then carried out by means of a special heat treatment the wound toroid in a magnetic field that was perpendicular to the direction of the ribbon.
  • the heat treatment was carried out in such a way that the value of the saturation magnetostriction of the rapidly solidified (as quenched) band changed during the heat treatment by an amount depending on the alloy composition in a positive direction until it was within the ranges shown in the table.
  • An F loop is understood to be a hysteresis loop which has a ratio of remanence B r to saturation induction B s ⁇ 50.
  • the saturation magnetostriction increased to ⁇ g ⁇ +8 x 10 "8.
  • the permeability increased to a comparatively high value of ⁇ ⁇ 1300 that reduced the DC tolerance.
  • the first ripening processes started at this temperature of crystallization nuclei already present in the faster solidified band (as quenched), which led to a substantial disturbance of the linearity of the characteristic.
  • the ring core was flushed with a protective gas so that no oxidation or other chemical reactions occurred on the surface of the band that would negatively influence the physical properties of the ring core.
  • the wound ring band core was heated under a magnetic field at a rate of 1 to 10 Kelvin / min to the temperatures of approximately 300 ° C, which are far below the specified Curie temperatures, and held in this transverse temperature field for several hours and then at a cooling rate of 0 , 1 to 5 Kelvin / min cooled again.
  • the producibility of very small and yet very high-precision current transformers presupposes that the amplitude permeability ⁇ of the current transformer core changes by less than 6%, preferably 4%, in the modulation range of 1 mT B B 0,9 0.9 B s .
  • This linearity requirement can be met via the described manufacturing process, provided that the strip material used has relative surface roughness R a re .
  • the definition of the roughness depth Ra re is explained below with reference to FIG. 8.
  • the x-axis is parallel to the surface of a body whose surface roughness is to be determined.
  • the y-axis is parallel to the surface normal the surface to be measured.
  • the surface roughness R ⁇ then corresponds to the height of a rectangle 7, the length of which is equal to a total measuring distance l m and which has the same area as the sum of the areas 10 enclosed between a roughness profile 8 and a middle line 9.
  • the current transformer manufactured with this toroid had a phase error of 8.9 ° +/- 0.1 ° in the entire current range.
  • the ratio between the highest transferable effective value of the bipolar zero-symmetrical sine current to be measured and the highest transferable amplitude of a unipolar half-wave rectified sine current was 1.4: 1.
  • the ring band core had a very good aging behavior at 120 ° C., which is shown in FIG. 6, which can be explained by the very high crystallization temperature and the high anisotropy energy of this alloy.
  • permeability values between 500 and 1400 can be set with the alloy range used according to the invention.
  • FIG. 5 shows, extremely high temperature stability of the permeability can be achieved by using the claimed alloy system.
  • the typical change between room temperature and + 100 ° C is less than 5%.

Landscapes

  • 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

L'invention concerne un transformateur de courant destiné au courant alternatif et comprenant des composants c.c.. Ce transformateur est composé au moins d'un noyau pourvu d'un enroulement primaire, et au moins d'un enroulement secondaire qui est monté en parallèle avec une résistance ohmique et qui ferme le circuit de courant secondaire à faible résistance. Le noyau du transformateur est un noyau annulaire fermé sans entrefer réalisé dans une bande en alliage ferromagnétique amorphe quasiment sans magnétostriction et ayant une perméabilitét µ < 1400. Les alliages qui s'avèrent particulièrement adaptés à un tel noyau en bande annulaire, sont des alliages à base de cobalt ayant sensiblement la formule suivante : Coa(Fe1-xMnx)bNicXdSieBfCg, où X représente au moins un des éléments V, Nb, Ta, Cr, Mo, W, Ge et P ; a-g sont exprimés en % atomique et a, b, d, e, f, g et x remplissent les conditions suivantes: 40 < a < 82; 2 < b ≤10; 0 < c < 30; 0 < d < 5; 0 < e < 15; 7≤ f < 26; 0 < g < 3; mit 15 < d + e + f + g≤ 30 et 0 < x < 1.-
EP99969529A 1998-09-17 1999-09-16 Transformateur de courant a tolerance vis-a-vis du courant continu Expired - Lifetime EP1114429B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19842710 1998-09-17
DE19842710 1998-09-17
PCT/DE1999/002955 WO2000017897A1 (fr) 1998-09-17 1999-09-16 Transformateur de courant a tolerance vis-a-vis du courant continu

Publications (2)

Publication Number Publication Date
EP1114429A1 true EP1114429A1 (fr) 2001-07-11
EP1114429B1 EP1114429B1 (fr) 2003-11-12

Family

ID=7881348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99969529A Expired - Lifetime EP1114429B1 (fr) 1998-09-17 1999-09-16 Transformateur de courant a tolerance vis-a-vis du courant continu

Country Status (5)

Country Link
US (1) US6563411B1 (fr)
EP (1) EP1114429B1 (fr)
JP (1) JP4755340B2 (fr)
DE (1) DE59907740D1 (fr)
WO (1) WO2000017897A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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 (fr) 2010-01-08 2011-07-13 Vaccumschmelze Gmbh & Co. KG Procédé de fabrication d'un dispositif d'établissement de courant

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100606514B1 (ko) * 1998-11-13 2006-07-31 바쿰슈멜체 게엠베하 운트 코. 카게 변류기에 사용하기에 적합한 자기 코어, 상기 자기 코어의 제조 방법 및 상기 자기 코어를 구비한 변류기
US6432226B2 (en) * 1999-04-12 2002-08-13 Alliedsignal Inc. Magnetic glassy alloys for high frequency applications
DE10134056B8 (de) * 2001-07-13 2014-05-28 Vacuumschmelze Gmbh & Co. Kg Verfahren zur Herstellung von nanokristallinen Magnetkernen sowie Vorrichtung zur Durchführung des Verfahrens
US6992555B2 (en) * 2003-01-30 2006-01-31 Metglas, Inc. Gapped amorphous metal-based magnetic core
WO2004076634A2 (fr) 2003-02-24 2004-09-10 Ira Sanders Translocation par membrane cellulaire d'inhibiteurs snare régulés, compositions associées et procédés de traitement de pathologies
JP5342745B2 (ja) 2003-04-02 2013-11-13 バクームシュメルツェ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニ コマンディートゲゼルシャフト 鉄心とその製造および使用方法
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
FR2877486B1 (fr) * 2004-10-29 2007-03-30 Imphy Alloys Sa Tore nanocristallin pour capteur de courant, compteurs d'energie a simple et a double etage et sondes de courant les incorporant
WO2006064920A1 (fr) 2004-12-17 2006-06-22 Hitachi Metals, Ltd. Noyau magnetique pour transformateur de courant, transformateur de courant et wattheuremetre
EP1724792A1 (fr) * 2005-05-20 2006-11-22 Imphy Alloys Procédé de fabrication d'une bande en matériau nanocristallin et dispositif de fabrication d'un tore enroulé à partir de cette bande
DE102005034486A1 (de) * 2005-07-20 2007-02-01 Vacuumschmelze Gmbh & Co. Kg Verfahren zur Herstellung eines weichmagnetischen Kerns für Generatoren sowie Generator mit einem derartigen Kern
EP1946126A4 (fr) * 2005-11-09 2012-06-13 Metglas Inc Transformateur de courant et compteur d'energie electrique
WO2008051623A2 (fr) * 2006-02-21 2008-05-02 Carnegie Mellon University Alliage magnétique souple et ses utilisations
KR100815617B1 (ko) * 2006-08-10 2008-03-21 한국표준과학연구원 전류변성기 비교기와 정밀 션트저항을 이용한 전류변성기용부담의 평가장치 및 그 방법
ATE418625T1 (de) * 2006-10-30 2009-01-15 Vacuumschmelze Gmbh & Co Kg Weichmagnetische legierung auf eisen-kobalt-basis sowie verfahren zu deren herstellung
KR100882310B1 (ko) * 2007-06-29 2009-02-10 한국표준과학연구원 전류변성기 비교 측정장치
US8012270B2 (en) 2007-07-27 2011-09-06 Vacuumschmelze Gmbh & Co. Kg Soft magnetic iron/cobalt/chromium-based alloy and process for manufacturing it
US9057115B2 (en) * 2007-07-27 2015-06-16 Vacuumschmelze Gmbh & Co. Kg Soft magnetic iron-cobalt-based alloy and process for manufacturing it
KR100904664B1 (ko) * 2008-06-03 2009-06-25 주식회사 에이엠오 전류 센서용 자기 코어
CN102760568A (zh) * 2011-04-28 2012-10-31 南京江北自动化技术有限公司 电流互感器
CN103632826B (zh) * 2012-08-23 2018-01-16 西门子公司 电流互感器和电流检测装置
CN103219140B (zh) * 2013-04-24 2016-08-10 南京江北自动化技术有限公司 一种电流互感器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824749A1 (de) 1978-06-06 1979-12-13 Vacuumschmelze Gmbh Induktives bauelement und verfahren zu seiner herstellung
DE2924280A1 (de) * 1979-06-15 1981-01-08 Vacuumschmelze Gmbh Amorphe weichmagnetische legierung
DE3049906A1 (en) 1979-09-21 1982-03-18 Hitachi Ltd Amorphous alloys
JPS59198708A (ja) 1983-04-25 1984-11-10 Hitachi Metals Ltd チヨ−クコイル用磁心
DE3422281A1 (de) 1983-06-20 1984-12-20 Allied Corp., Morristown, N.J. Verfahren zur herstellung von formlingen aus magnetischen metallegierungen und so hergestellte formlinge
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 (fr) 1986-01-08 1992-05-13 AlliedSignal Inc. Alliages métalliques vitreux à caractéristiques perminvar
WO1988003699A1 (fr) * 1986-11-03 1988-05-19 Allied Corporation Alliages metalliques vitreux magnetostrictifs proches de zero pour applications haute frequence
JPH02167478A (ja) 1988-09-22 1990-06-27 Toshiba Corp 電流センサ
DE19653428C1 (de) * 1996-12-20 1998-03-26 Vacuumschmelze Gmbh Verfahren zum Herstellen von Bandkernbändern sowie induktives Bauelement mit Bandkern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0017897A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
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 (fr) 2010-01-08 2011-07-13 Vaccumschmelze Gmbh & Co. KG Procédé de fabrication d'un dispositif d'établissement de courant
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
US6563411B1 (en) 2003-05-13
DE59907740D1 (de) 2003-12-18
JP2002525863A (ja) 2002-08-13
EP1114429B1 (fr) 2003-11-12
JP4755340B2 (ja) 2011-08-24
WO2000017897A1 (fr) 2000-03-30

Similar Documents

Publication Publication Date Title
EP1114429B1 (fr) Transformateur de courant a tolerance vis-a-vis du courant continu
EP1131830B1 (fr) Noyau magnetique destine a etre utilise dans un transformateur d&#39;intensite, procede de fabrication d&#39;un noyau magnetique et transformateur d&#39;intensite equipe d&#39;un tel noyau
EP1609159B1 (fr) Noyau magnetique, procede de realisation associe, utilisation d&#39;un noyau magnetique de ce type notamment dans des transformateurs de courant et dans des bobines de choc a compensation de courant, alliages et bandes pour realiser un tel noyau magnetique
DE3884491T2 (de) Magnetkern und Verfahren zur Herstellung.
DE2708151C2 (de) Verwendung glasartiger Legierungen für Netztransformatoren oder Signalwandler
EP1317758B1 (fr) Transducteur magnetique a demi-periode avec noyau magnetique, utilisation de transducteurs magnetiques a demi-periode, ainsi que procede de fabrication de noyaux magnetiques pour transducteurs magnetiques a demi-periode
EP1747566B1 (fr) Noyau de transformateur de courant et procede de production d&#39;un noyau de transformateur de courant
DE3001889C2 (de) Verfahren zur Herstellung einer magnetischen glasartigen Legierungsfolie
DE202005022087U1 (de) Nanokristalliner Kern für Stromsensoren, ein- und zweistufige Energiezähler und diese integrierende Stromsonden
DE102017115791B4 (de) R-T-B-basierter Seltenerdpermanentmagnet
DE102007004835A1 (de) Amorphe weichmagnetische Legierung und diese verwendendes Induktions-Bauteil
DE2835389A1 (de) Magnetische legierung
DE2424131B2 (de) Drossel
DE10042611A1 (de) Ferrit auf Mangan-Zink(Mn-Zn)-Basis
DE3911480A1 (de) Verwendung einer feinkristallinen eisen-basislegierung als magnetwerkstoff fuer fehlerstrom-schutzschalter
DE69420817T2 (de) Aktiver Filter und seine Benutzung in einer Stromversorgungseinrichtung
EP1129459B1 (fr) Utilisation d&#39;un noyau magnetique pour un transformateur d&#39;intensite, procede de fabrication d&#39;un noyau magnetique et transformateur d&#39;intensite equipe d&#39;un tel noyau
DE19739959C2 (de) Hartmagnetisches Material
DE3619659C2 (de) Verwendung einer glasartigen Legierung auf Fe-Basis
WO1998012847A1 (fr) Transformateur d&#39;impulsions pour interfaces en u selon le principe de la compensation d&#39;echo
DE69002044T2 (de) Dünner weichmagnetischer Film.
DE3486331T2 (de) Kern eines Störungsfilters aus einer amorphen Legierung.
DE69015881T2 (de) Weichmagnetische Legierung, Herstellungsverfahren, Magnetkern, magnetischer Schirm und gepresster Magnetkern damit.
DE69004962T2 (de) Eisenreiche metallische gläser mit hoher sättigungsinduktion und guten weichmagnetischen eigenschaften bei hohen magnetisierungsgeschwindigkeiten.
US7048809B2 (en) Magnetic implement having a linear BH loop

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010406

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031112

REF Corresponds to:

Ref document number: 59907740

Country of ref document: DE

Date of ref document: 20031218

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040813

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140923

Year of fee payment: 16

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150916

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150916

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20160922

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20171002

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170916

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20181130

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59907740

Country of ref document: DE