EP0005836B1 - Induktives Bauelement und Verfahren zu seiner Herstellung - Google Patents

Induktives Bauelement und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0005836B1
EP0005836B1 EP79101673A EP79101673A EP0005836B1 EP 0005836 B1 EP0005836 B1 EP 0005836B1 EP 79101673 A EP79101673 A EP 79101673A EP 79101673 A EP79101673 A EP 79101673A EP 0005836 B1 EP0005836 B1 EP 0005836B1
Authority
EP
European Patent Office
Prior art keywords
winding
electrically conductive
soft magnetic
inductive component
conductive winding
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.)
Expired
Application number
EP79101673A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0005836A3 (en
EP0005836A2 (de
Inventor
Richard Dr. Boll
Hans-Jürgen Dipl.-Phys. Köster
Hans-Reiner Dr. Hilzinger
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
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Filing date
Publication date
Application filed by Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of EP0005836A2 publication Critical patent/EP0005836A2/de
Publication of EP0005836A3 publication Critical patent/EP0005836A3/xx
Application granted granted Critical
Publication of EP0005836B1 publication Critical patent/EP0005836B1/de
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/04—Amorphous alloys with nickel or cobalt as the major constituent
    • 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
    • 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

Definitions

  • the invention relates to an inductive component, on the electrically conductive winding tape of soft magnetic material is wound.
  • inductive components have a soft magnetic core, which can be wound, for example, from tape or laminated from sheet metal, and an electrical winding applied to this core.
  • the winding is usually wound onto the core in the form of a toroid.
  • Cutting tape cores or cores made of layered and optionally glued laminated cores can be inserted into the finished winding.
  • inductive components for example transformers, chokes and converters
  • the band-shaped core material made of soft magnetic material is wound onto the prefabricated electrical winding.
  • the band-shaped core material is first pre-wound to a diameter similar to that which will later lie on the winding before being applied to the winding, then heat-treated to remove the mechanical stresses and finally, if necessary after being rewound, wound up on the winding .
  • the finished winding core which has the shape of a ring band core, then encloses a part of the electrical winding corresponding to its bandwidth (DE-C-711770, 722211, 727 073, 729918, 737 787 and 915 588).
  • the change in the curvature of the tapes is kept to a minimum during winding, it cannot be avoided that the magnetic properties deteriorate during winding after the heat treatment.
  • the deterioration can still be kept within reasonable limits with silicon-iron alloys, but with the high-quality nickel-iron alloys a significant reduction in quality has to be accepted (R. Bauer, "Der Meßwandler”, Berlin / Göttingen / Heidelberg [ Springer-Verlag], 1953, page 55, paragraph 3).
  • the object of the invention is to further improve an inductive component on whose electrically conductive winding tape made of soft magnetic material is wound.
  • the electrically conductive winding is ring-shaped and in that the soft magnetic tape consists of an amorphous alloy and is wound onto the winding in a toroidal shape in such a way that it largely encloses it.
  • This type of construction initially has the advantage that the toroidally wound amorphous soft magnetic tape acts at the same time as a magnetic shield, similar to a shell core. Furthermore, soft magnetic tapes made of amorphous alloys can be wound onto the electrically conductive winding much more easily than tapes made of crystalline alloys, without the magnetic properties of the soft magnetic material being adversely affected. This will be explained in more detail below.
  • Amorphous tapes with a width that is not too large, for example with a width of up to 5 mm, as can easily be produced directly from the melt, are particularly suitable for the component according to the invention. These tapes can then be applied in one or more layers in a similar manner to the prefabricated electrically conductive winding, such as, for example in conventional inductive components, the electrically conductive winding being wound onto a prefabricated toroidal core.
  • amorphous metal alloys can be produced by cooling an appropriate melt so rapidly that solidification occurs without crystallization.
  • the alloys can be obtained in the form of thin strips, the thickness of which can be, for example, a few hundredths of a millimeter and the width of which can be several millimeters.
  • the amorphous alloys can be distinguished from the crystalline alloys by means of X-ray diffraction measurements. In contrast to crystalline materials, which show characteristic sharp diffraction lines, the intensity in the X-ray diffraction pattern with amorphous metal alloys changes only slowly with the diffraction angle, similarly as is the case with liquids or ordinary glass.
  • the amorphous alloys can be completely amorphous or comprise a two-phase mixture of the amorphous and the crystalline state.
  • an "amorphous metal alloy” is an alloy that is at least 50%, preferably at least 80%, amorphous.
  • the so-called crystallization temperature For every amorphous metal alloy there is a characteristic temperature, the so-called crystallization temperature. If the amorphous alloy is heated to or above this temperature, it changes to the crystalline state. In the case of heat treatments below the crystallization temperature, however, the amorphous state is retained.
  • the previously known soft magnetic amorphous metal alloys have the composition MyX i -y, where M is at least one of the metals iron, cobalt and nickel and X is at least one of the so-called glass-forming elements boron, carbon, silicon and phosphorus and y is between about 0.60 and 0 , 95 lies.
  • the amorphous alloys can also contain other metals, in particular titanium, zirconium, Contain hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, palladium, platinum, copper, silver or gold, while in addition to the glass-forming elements X or optionally also the elements aluminum, gallium, indium, germanium , Tin, arsenic, antimony, bismuth or beryllium can be present (see, for example, DE-A-2 546 676, 2 553 003, 2 605 615, 2 628 362 and 2 708151).
  • a number of cobalt-containing amorphous alloys as are known, for example, from DE-A-2 546 676 and DE-A-2 708 151, have a magnetostriction that is close to zero.
  • These alloys can preferably have the composition Co a Fe b Ni c Si d B e P f C 9 Al h , wherein such as is.
  • the magnetic properties of these alloys are very insensitive to deformation. Tapes made from such alloys can therefore be wound onto the electrically conductive winding after prior heat treatment or, if appropriate, completely without heat treatment.
  • soft magnetic amorphous alloys in particular those of the composition Fe a NitMecPdBeSifE 9 Alh, where Me is one or more of the metals cobalt, chromium, molybdenum, titanium, vanadium, copper and such as have no disappearing magnetostriction.
  • the component can therefore be subjected to a heat treatment between 150 and 400 ° C after the amorphous soft magnetic tape has been wound onto the prefabricated electrically conductive winding provided with insulation, provided that the other materials used for the component are also stable at these temperatures are.
  • the electrically conductive winding can advantageously be made from aluminum, which results in considerable weight savings compared to copper.
  • the individual windings can be insulated from each other in a simple, temperature-resistant manner by a ®eloxal layer on their surface.
  • foils for example made of plastics with appropriate temperature resistance, for insulation.
  • copper can of course also be used for the electrically conductive winding, for example insulated with temperature-resistant varnish or glass fiber wound.
  • the electrically conductive winding can be produced particularly advantageously from strip material, preferably aluminum strip, which can then be wound in a manner similar to that of ring core in a conventional component. With such a tape winding, a particularly high fill factor and thus a particularly compact design can be achieved.
  • An approximately rectangular cross section is preferably chosen for the electrically conductive winding, with an aspect ratio of the side parallel to the winding axis to the side perpendicular to the winding axis of approximately 2.5: 1 to 1: 1.
  • the winding can also consist of several electrically separate partial windings, for example the primary and secondary winding of a transformer or transformer.
  • the electrically conductive annular winding provided with a toroidal winding made of soft magnetic tape. It is also expedient to make the winding package made of soft magnetic tape so thick that half the diameter of the winding hole of the electrically conductive winding is filled with soft magnetic material.
  • the fill factors of the two windings should be chosen to be as large as possible if, with a predetermined maximum output of the Component should have the smallest possible construction volume. The maximum performance, based on the volume unit, increases with increasing fill factors. Fillings of up to 0.9 can be achieved with a winding made of aluminum tape, and fill factors up to 0.3 with a soft magnetic toroidal winding.
  • the ratio of the outer diameter to the inner diameter of the electrically conductive winding between 1.3 and 3.5, preferably between 1.5 and 2.5 , to choose.
  • expensive soft magnetic material can also be saved at the expense of cheaper conductor material.
  • the amount of soft magnetic material required per power unit decreases and the corresponding amount of conductor material increases in the components according to the application with a growing ratio between the outside and inside diameter of the electrically conductive winding.
  • the reverse is the case.
  • the transformer is designed for a primary voltage (square wave voltage) of 300 V, a secondary voltage of 48 V and a transferable power of 670 W at a frequency of 20 kHz.
  • the ambient temperature should be 60 ° C, the permitted overtemperature 60 K.
  • the magnetic loss of the soft magnetic winding is 28 W / kg.
  • the transformer was constructed from a primary winding 1 with 122 turns of 0.08 mm thick and 18 mm wide aluminum tape and a secondary winding 2 with 20 turns of 0.45 mm thick and 18 mm wide aluminum tape.
  • a 19 mm wide, 0.2 mm thick polyimide film was inserted as insulation between the turns, which is not shown in FIG. 2 for reasons of better clarity.
  • the fill factor, the winding consisting of the two partial windings 1 and 2, which has a square cross section, is approximately 0.85.
  • the ratio of outer diameter d 2 to inner diameter d, the winding is 2.4.
  • a polyimide film 3 which can be applied to the winding by deep drawing, for example, is again used as the top insulation of the electrically conductive winding 1, 2.
  • the soft magnetic winding the completely wound transformer was heat-treated in air for about one hour at a temperature between about 300 and 350 ° C and then checked to a temperature at a cooling rate of about 100 to 250 ° C per hour let cool below 200 ° C and continue uncontrolled.
  • This heat treatment also creates a thin oxide layer on the tape made of the amorphous alloy, which is sufficient to isolate the individual turns from one another for the purpose of avoiding eddy currents.
  • a plastic film can be applied to the soft magnetic winding as additional protection.
  • the aluminum has a weight of 138 g and the band made of the amorphous alloy has a weight of 69 g.
  • the weight of the magnetic material is therefore much lower than that of the conductor material.
  • the ratio of mass or weight m to power P in g / W is plotted on the ordinate, and the ratio of outer diameter d 2 to inner diameter d i is plotted on the abscissa.
  • the solid curves 11, 12 and 13 apply to components according to the application. It is assumed that the electrically conductive winding consists of aluminum and has a square cross-section and a fill factor of 0.85 and that the soft magnetic winding is made of amorphous material toroidal, has a fill factor of 0.2 and half the diameter d i of the winding hole of the electrically conductive winding. For the magnetic material, 28 W / kg with an induction of 0.2 T and a frequency of 20 kHz are assumed for the iron losses. The dimensions refer to an ambient temperature of 60 ° C and an excess temperature of 60 K.
  • Curve 11 shows the mass of the soft magnetic material, curve 12 the mass of the electrically conductive material and curve 13 the total mass, in each case based on the power.
  • the mass of the required magnetic material is smaller than the mass of the required conductor material, in each case based on the power.
  • the interrupted curves 14, 15 and 16 are comparison curves which relate to conventional components. It is assumed that the soft magnetic winding is a toroidal core which corresponds in terms of geometry and fill factor to the electrically conductive winding of the components according to the application and that the electrically conductive winding consists of copper wire and corresponds to the soft magnetic winding of the components according to the application in terms of geometry and filling factor.
  • Curve 14 shows the mass of the soft magnetic material, curve 15 the mass of the conductor material, curve 16 the total mass, in each case based on the power, as a function of the ratio of the outer diameter d 2 to the inner diameter d 1 of the ring band core.
  • curves 13 and 16 mentioned are shown again in FIG. FIG. 4 also contains two further curves, of which curve 17 represents the volume V of the components according to the application and curve 18 the volume V of the conventional components, in each case based on the power P as a function of the diameter ratio d 2 / d 1 .
  • the required properties of the components are the same as in FIG. 3.
  • Curves 17 and 18 show that for a given diameter ratio, the volume per output in the components according to the application is somewhat larger than in the conventional components. In view of the considerable savings in soft magnetic material shown in FIG. 3 at the expense of conductor material in the components according to the application, however, this is not very important. It can also be seen from FIG.
  • Diameter ratios between approximately 1.5 and 2.5 are particularly advantageous, with the already mentioned advantage being added with increasing diameter ratio that soft magnetic material can be saved.
  • the electrically conductive windings have the particularly favorable square cross section.
  • the invention is not limited to this; rather, the electrically conductive windings can also have other cross-sectional shapes.
  • the cross section can also be rectangular, but the ratio between that parallel to the winding axis and that perpendicular to the winding axis Side, as already mentioned, should preferably be between 2.5: 1 and 1: 1.
  • the electrically conductive winding can consist of parts of different heights.
  • An exemplary embodiment of this is shown schematically in FIG. 5.
  • the electrically conductive winding consists of a primary winding 21 and two secondary windings 22 and 23, for example made of aluminum strip, the height of which decreases from the outside inwards.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
EP79101673A 1978-06-06 1979-05-31 Induktives Bauelement und Verfahren zu seiner Herstellung Expired EP0005836B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2824749 1978-06-06
DE19782824749 DE2824749A1 (de) 1978-06-06 1978-06-06 Induktives bauelement und verfahren zu seiner herstellung

Publications (3)

Publication Number Publication Date
EP0005836A2 EP0005836A2 (de) 1979-12-12
EP0005836A3 EP0005836A3 (en) 1980-01-09
EP0005836B1 true EP0005836B1 (de) 1982-05-12

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Family Applications (1)

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EP79101673A Expired EP0005836B1 (de) 1978-06-06 1979-05-31 Induktives Bauelement und Verfahren zu seiner Herstellung

Country Status (4)

Country Link
EP (1) EP0005836B1 (ja)
JP (1) JPS553695A (ja)
CA (1) CA1148229A (ja)
DE (2) DE2824749A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062091C1 (de) * 2000-12-13 2002-07-11 Urs Graubner Induktives Bauelement

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JPS55161057A (en) * 1979-06-04 1980-12-15 Sony Corp Manufacture of high permeability amorphous alloy
JPS5841649B2 (ja) * 1980-04-30 1983-09-13 株式会社東芝 巻鉄芯
JPS5831053A (ja) * 1981-08-18 1983-02-23 Toshiba Corp 非晶質合金
DE3175475D1 (en) * 1981-11-26 1986-11-20 Allied Corp Low magnetostriction amorphous metal alloys
EP0160166A1 (en) * 1981-11-26 1985-11-06 Allied Corporation Low magnetostriction amorphous metal alloys
JPS58139408A (ja) * 1982-02-15 1983-08-18 Hitachi Metals Ltd 巻鉄心の製造方法
JPH0611007B2 (ja) * 1982-10-05 1994-02-09 ティーディーケイ株式会社 磁気スイツチ用磁心
JPS59150414A (ja) * 1982-12-23 1984-08-28 Toshiba Corp 半導体回路用リアクトル
DE3424958A1 (de) * 1983-07-06 1985-01-17 Mitsubishi Denki K.K., Tokio/Tokyo Drahtelektrode fuer eine elektrische entladungsbearbeitung mittels schneidedraht
JPS6029234A (ja) * 1983-07-11 1985-02-14 Mitsubishi Electric Corp ワイヤカツト放電加工用ワイヤ電極
JPS61288048A (ja) * 1985-06-13 1986-12-18 Hitachi Metals Ltd 低損失Ｆｅ基非晶質合金
JPH07117511B2 (ja) * 1987-02-04 1995-12-18 株式会社神戸製鋼所 菌体量の計測方法
US4958134A (en) * 1987-09-04 1990-09-18 Kabushiki Kaisha Toshiba Noise suppression device comprising a toroid winding
DE3733376A1 (de) * 1987-10-02 1989-04-13 Vacuumschmelze Gmbh Verfahren zur herstellung eines koaxial feldgekoppelten uebertragers
JPH061733B2 (ja) * 1989-06-15 1994-01-05 株式会社東芝 スイッチング回路用リアクトル
EP0720277B1 (en) * 1992-09-24 2000-03-15 Kabushiki Kaisha Toshiba Snubber circuit, switching power-supply, and saturable inductor used for them
DE19681738B4 (de) * 1996-12-30 2005-04-21 Seibel, Wilhelm, Dipl.-Ing. Verfahren zum Bündeln der magnetischen Kraftlinien von Dauermagneten und Ausrichten des magnetischen Flusses
US6563411B1 (en) 1998-09-17 2003-05-13 Vacuumschmelze Gmbh Current transformer with direct current tolerance
US6580347B1 (en) 1998-11-13 2003-06-17 Vacuumschmelze Gmbh Magnetic core that is suitable for use in a current transformer, method for the production of a magnetic core and current transformer with a magnetic core
CN101509106B (zh) * 2008-02-20 2010-06-30 吴更生 一种铁基非晶态合金材料及其制备方法
DE102009043539A1 (de) * 2009-09-30 2011-04-21 Vacuumschmelze Gmbh & Co. Kg Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens
CA2962384A1 (en) * 2014-09-26 2016-03-31 Hitachi Metals, Ltd. Method of manufacturing amorphous alloy magnetic core
CN106716569B (zh) 2014-09-26 2019-08-13 日立金属株式会社 非晶合金磁芯和其制造方法

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US4053331A (en) * 1974-09-20 1977-10-11 University Of Pennsylvania Method of making amorphous metallic alloys having enhanced magnetic properties by using tensile stress
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NL176090C (nl) * 1977-02-26 1985-02-18 Vacuumschmelze Gmbh Werkwijze voor het verminderen van de ommagnetisatieverliezen in dunne banden uit week-magnetische amorfe metaallegeringen.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062091C1 (de) * 2000-12-13 2002-07-11 Urs Graubner Induktives Bauelement

Also Published As

Publication number Publication date
DE2824749A1 (de) 1979-12-13
JPS553695A (en) 1980-01-11
EP0005836A3 (en) 1980-01-09
EP0005836A2 (de) 1979-12-12
CA1148229A (en) 1983-06-14
DE2962787D1 (en) 1982-07-01

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