EP1030319A1 - Noyau annulaire - Google Patents

Noyau annulaire Download PDF

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Publication number
EP1030319A1
EP1030319A1 EP99123475A EP99123475A EP1030319A1 EP 1030319 A1 EP1030319 A1 EP 1030319A1 EP 99123475 A EP99123475 A EP 99123475A EP 99123475 A EP99123475 A EP 99123475A EP 1030319 A1 EP1030319 A1 EP 1030319A1
Authority
EP
European Patent Office
Prior art keywords
layer
toroidal core
conductive material
air gap
magnetic
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
EP99123475A
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German (de)
English (en)
Other versions
EP1030319B1 (fr
Inventor
Aloys Wobben
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Individual
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Individual
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Publication date
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Publication of EP1030319A1 publication Critical patent/EP1030319A1/fr
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Classifications

    • 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

Definitions

  • Toroidal cores are used in electrical engineering, especially in coils to increase inductance, widely used.
  • An example is a choke coil, whose ohmic resistance is low compared to the inductive reactance.
  • a toroidal core for example a laminated iron core
  • the inductance of such a choke coil is significantly increased (iron chokes). If the iron path is closed, it often receives air gaps in order to influence the Reduce iron saturation (restrict air gap).
  • the magnetization characteristics of coils or Set inductors to a desired value. Such inductors will increasingly used in modern power electronics in the higher power range.
  • An application area such as e.g. the smoothing of pulsating DC, filtering DC, decoupling systems or for Voltage regulator (step-down converter, step-up converter) mentioned.
  • Other areas of application for inductors with a toroid are short-circuit chokes at one Inverter branch or filter chokes.
  • different magnetization characteristics as exemplified in Figure 1 are shown, adjust. These magnetization characteristics are then also called hysteresis loops.
  • the toroid In the case of the hysteresis characteristic in FIG. 1 of type a, the toroid has no air gap on. In the case of the hysteresis magnetization characteristic of type b, the toroid has a relatively small air gap on and at the hysteresis magnetization characteristic of type c, the toroid has a very large air gap.
  • the air gap of a toroidal core can be concentrated at one point, so that the Can see and also measure the gap (macroscopic air gap). But it can also divided several small air gaps over the magnetic circuit or the toroid his. Then one speaks of a so-called "microscopic air gap". For this is achieved in iron powder cores by adding non-magnetic substances effective air gap distributed over the entire circumference. Embodiments for one FIG. 2 shows the macroscopic and microscopic air gap.
  • a ring core is known from EP 0 401 805, in which very thin-layer materials can be processed into a toroid in the range of a few ⁇ m. Indeed the production of these toroids is very complicated, complex and the toroids are not very suitable for use in power electronics.
  • a toroidal core with a macroscopic air gap is produced in usually as follows. First you wind a dynamo sheet on a core, which is removed after the winding process. Then you cut one Air gap in the ring using a saw, laser or similar tool. Very small gaps can be difficult and difficult with this method awkward to manufacture because the air gap width is always directly from the tool width depends.
  • the object of the invention is to provide a toroidal core, which the above Does not have disadvantages and is easier and cheaper to manufacture leaves. This has other advantages such as a precise definition of the course the magnetization characteristic and very low stray fields.
  • the invention is based on the approach of making the toroid from at least two wound on one another Produce layers of material / layers, the first layer is made of a magnetically and electrically conductive material and the second layer consists of a non-magnetic and non-electrically conductive material.
  • first laminated layer for example a dynamo sheet can be used, while paper or film can be used for the second layer.
  • the desired magnetization characteristics are set. For example, receives when using very thin layer material, such as very thin paper, a very slightly sheared characteristic, which is very, very small Corresponds to air gap. If the shear of the characteristic curve is to be larger, this can be done accordingly thicker, non-conductive layer material can be used.
  • Toroidal cores with a microscopic air gap can be used Use standard materials available on the market to produce toroidal cores, depending on the Choice of materials and in particular the material thicknesses a desired magnetization characteristic exhibit.
  • toroidal cores with a very lightly sheared characteristic is easy to implement by using only very thin, non-conductive material is used. This has the consequence that an inductance with such a toroid with a very slightly sheared characteristic, even very little Has stray fields, so that in very powerful applications in the Power electronics no stray fields occur.
  • Such a toroid also experiences no deformation at high currents / magnetic fields and is therefore also suitable for Power electronics preferred.
  • Figure 1 shows three different types of characteristics.
  • the characteristic of type a shows one Hysteresis loop of an inductance with a toroid without an air gap.
  • the Type b characteristic is slightly sheared and the toroid has one relatively small air gap.
  • the characteristic curve of type c is very wide sheared and the toroid has a very large air gap.
  • Figure 2 shows the basic structure of a toroid with a macroscopic air gap - type 1 - and a toroid with a microscopic air gap - type 2.
  • the toroid Type 1 consists for example of a magnetically and electrically conductive Material like dynamo sheet.
  • the type 2 toroid also consists of a magnetic and electrically conductive material, but not magnetic substances are added.
  • FIG. 3 shows a wound ring core consisting of two layers.
  • the The first layer or layer - solid line - consists of a dynamo sheet and the second layer / layer - dashed line - consists of a magnetic and electrically non-conductive material, such as paper or one Foil.
  • the desired magnetization characteristic can be wound in such a way Ring core through the number of windings and through the choice of material and layer thickness determine. If you choose a relative for the non-conductive material small thickness compared to the dynamo sheet, you get a light in the result sheared characteristic, with which an inductance in a toroid with a very small Air gap can be reached.
  • the shear of the characteristic curve is to increase, instead of very thin non-conductive material it becomes correspondingly thicker non-conductive Material used.
  • the magnetization characteristic also set by the appropriate choice for the thickness of the conductive material, it always depends on the relation of the layer thicknesses of conductive and not conductive material arrives.
  • the dynamo sheet can be used for low frequency applications e.g. 50 Hertz, have a thickness of about 0.05 to 0.6 mm. For applications with higher Operating frequencies can be used in sheet thicknesses of 0.1 to 0.3 mm. In a special application of the toroid in a short-circuit choke or in a step-up converter could be a thickness of 0.23 mm for the material layer thickness of the dynamo sheet can be found to be very suitable. For the fat of the magnetically non-conductive material, layer thicknesses of about 0.01 to 0.5 mm in question. This material thickness gives the height of the maximum when used Current of the throttle again. For short-circuit chokes there is a layer thickness of 0.1 mm very well suited for the non-conductive material layer.
  • Figure 5 shows one such a known arrangement in which, in addition to the main river, the stray flow is applied.
  • Magnetic field lines always try to take the easiest route to take. You should the legs and the in the drawn geometry ( Figure 5) flow through both yokes.
  • the magnetic field lines must have 4 air gaps overcome (magnetically non-conductive routes). With this geometry stray fields are easy to form because they are an alternative to the desired route represent.
  • FIG. 4 shows an annular core according to the invention and the associated main flow or Stray flux distribution. Since the effective air gap in that shown in Figure 4 The ring core is evenly distributed over the entire circumference, is the magnetic one Conductivity homogeneous over the entire magnetic length. There is none pronounced barriers, such as a concentrated air gap, in that shown in Figure 5 Arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Soft Magnetic Materials (AREA)
EP99123475A 1999-02-20 1999-11-25 Noyau annulaire Expired - Lifetime EP1030319B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19907320 1999-02-20
DE19907320A DE19907320C2 (de) 1999-02-20 1999-02-20 Ringkern und dessen Verwendung

Publications (2)

Publication Number Publication Date
EP1030319A1 true EP1030319A1 (fr) 2000-08-23
EP1030319B1 EP1030319B1 (fr) 2004-04-28

Family

ID=7898272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123475A Expired - Lifetime EP1030319B1 (fr) 1999-02-20 1999-11-25 Noyau annulaire

Country Status (9)

Country Link
EP (1) EP1030319B1 (fr)
JP (1) JP3648425B2 (fr)
AR (1) AR022629A1 (fr)
AT (1) ATE265736T1 (fr)
BR (1) BR0000298B1 (fr)
DE (2) DE19907320C2 (fr)
DK (1) DK1030319T3 (fr)
ES (1) ES2217676T3 (fr)
PT (1) PT1030319E (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314265A1 (de) * 2003-03-29 2004-10-07 J. Pröpster GmbH Blitzschutzmaterial Metallwarenfabrik Entkopplungselement zur Entkopplung mindestens zweier Überspannungs-Schutzeinrichtungen einer baulichen Anlage
ES2343930B1 (es) * 2008-05-22 2011-06-28 Universidad Carlos Iii De Madrid Inductancia para corriente continua.
JP5555725B2 (ja) 2012-01-13 2014-07-23 本田技研工業株式会社 電気負荷制御装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2106374A1 (fr) * 1970-09-08 1972-05-05 Siemens Ag
FR2502834A1 (fr) * 1981-03-25 1982-10-01 Magnetic Metals Gmbh Noyau de transformateur differentiel pour courants pulsatoires et interrupteur de protection contre des courants de fuite utilisant un tel noyau
US4441940A (en) * 1980-08-19 1984-04-10 Vacuumschmelze Gmbh Method for producing toroidal tape cores for fault current safety switches and use of such cores
GB2133932A (en) * 1982-12-31 1984-08-01 Int Research & Dev Co Ltd Improvements to strip wound magnetic cores
US4558297A (en) * 1982-10-05 1985-12-10 Tdk Corporation Saturable core consisting of a thin strip of amorphous magnetic alloy and a method for manufacturing the same
EP0401805A2 (fr) * 1989-06-08 1990-12-12 Kabushiki Kaisha Toshiba Noyau magnétique
WO1991018404A1 (fr) * 1990-05-18 1991-11-28 Allied-Signal Inc. Noyaux magnetiques fabriques avec des rubans de verre metallique et un isolant interlaminaire en papier de mica
JPH07201549A (ja) * 1994-01-11 1995-08-04 Nippon Steel Corp インダクタ素子

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495167A (en) * 1945-05-19 1950-01-17 Westinghouse Electric Corp Wound core
GB1115507A (en) * 1964-09-10 1968-05-29 Mini Of The Ministerul Ind Con Manufacturing processes of magnetic cores of stratified strips and sheets
DE2913741A1 (de) * 1979-04-05 1980-10-09 Philips Patentverwaltung Verfahren zum herstellen von ringbandkernen fuer transformatoren und nach dem verfahren hergestellter ringbandkern
GB2105522A (en) * 1981-09-05 1983-03-23 Gen Motors Ltd Laminated core structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2106374A1 (fr) * 1970-09-08 1972-05-05 Siemens Ag
US4441940A (en) * 1980-08-19 1984-04-10 Vacuumschmelze Gmbh Method for producing toroidal tape cores for fault current safety switches and use of such cores
FR2502834A1 (fr) * 1981-03-25 1982-10-01 Magnetic Metals Gmbh Noyau de transformateur differentiel pour courants pulsatoires et interrupteur de protection contre des courants de fuite utilisant un tel noyau
US4558297A (en) * 1982-10-05 1985-12-10 Tdk Corporation Saturable core consisting of a thin strip of amorphous magnetic alloy and a method for manufacturing the same
GB2133932A (en) * 1982-12-31 1984-08-01 Int Research & Dev Co Ltd Improvements to strip wound magnetic cores
EP0401805A2 (fr) * 1989-06-08 1990-12-12 Kabushiki Kaisha Toshiba Noyau magnétique
WO1991018404A1 (fr) * 1990-05-18 1991-11-28 Allied-Signal Inc. Noyaux magnetiques fabriques avec des rubans de verre metallique et un isolant interlaminaire en papier de mica
JPH07201549A (ja) * 1994-01-11 1995-08-04 Nippon Steel Corp インダクタ素子

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) *

Also Published As

Publication number Publication date
PT1030319E (pt) 2004-09-30
DK1030319T3 (da) 2004-08-09
BR0000298B1 (pt) 2013-05-14
DE59909327D1 (de) 2004-06-03
DE19907320C2 (de) 2001-03-08
DE19907320A1 (de) 2000-08-31
BR0000298A (pt) 2000-09-12
EP1030319B1 (fr) 2004-04-28
AR022629A1 (es) 2002-09-04
JP3648425B2 (ja) 2005-05-18
JP2000243616A (ja) 2000-09-08
ES2217676T3 (es) 2004-11-01
ATE265736T1 (de) 2004-05-15

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