EP0185149A1 - Accumulating inductor - Google Patents

Accumulating inductor Download PDF

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Publication number
EP0185149A1
EP0185149A1 EP85111867A EP85111867A EP0185149A1 EP 0185149 A1 EP0185149 A1 EP 0185149A1 EP 85111867 A EP85111867 A EP 85111867A EP 85111867 A EP85111867 A EP 85111867A EP 0185149 A1 EP0185149 A1 EP 0185149A1
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EP
European Patent Office
Prior art keywords
core
air gap
end faces
adjacent end
areas
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.)
Withdrawn
Application number
EP85111867A
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German (de)
French (fr)
Inventor
Paul Dr. Neusser
Werner Rössler
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Siemens AG
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Siemens AG
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    • 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
    • H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
    • H01F38/023—Adaptations of transformers or inductances for specific applications or functions for non-linear operation of inductances

Definitions

  • the invention relates to a storage inductor, in particular for flux converters and buck converters, with a magnetizable core, in particular shell core, E core, RM core and U core, with an air gap formed between adjacent end faces of core parts
  • Storage chokes intended for flux converters and buck converters must have a non-linear DC bias characteristic.
  • the inductance should be as high as possible, eg 1 50 pH and at nominal load; ie around 1 to 10 A much lower, namely 30 ⁇ H for example. This requirement cannot be met with ferrite cores with a constant air gap, ie with a constant air gap height.
  • the present invention has for its object to provide a storage inductor of the type mentioned, which meets the requirements shown with regard to the non-linear DC bias characteristics despite little effort.
  • the invention provides for a storage choke according to the preamble of the claim that the adjacent end faces e.g. the central slug of shell core, RM core and E core, are aligned in some areas without an air gap and in some areas with an air gap of changing air gap height.
  • 1, 2 has a ferrite RM core with core halves 1, 2, which are formed with central slugs 5, 6. With 3 a coil body pushed onto the middle slugs 5, 6 is designated, which carries a winding 4 in its winding space.
  • the central slug 5 On its front-side part facing the central slug 6, the central slug 5 is shaped like a truncated cone. With its surface 7, this truncated cone lies on the end face of the central slug 6 without an air gap.
  • the angle of the truncated cone can be between 5 and 60 °, the angle ⁇ and the “contact surface” 7 being chosen depending on the desired DC bias characteristic.
  • 1, 2 shows, for example, the curve c in FIG. 3.
  • the inductance lies in the desired range of approx. 150 pH and remains at a value of approx. 30 over a large current range pH.
  • the mutually facing end parts for example the central slug of the cores, can also be shaped like a roof.
  • FIG. 4 shows an embodiment for this, in which 8 denotes the "flat" end face, which, so to speak, bears without air gap against the end face of the adjacent central panel facing it.
  • the "roof pitch” and the "x" width of the airless area are again selected depending on the desired DC bias characteristics. Examples of DC bias characteristics such as those at an angle of 15 ° and widths x of 1; 1.5; 3 or 4 mm are obtained, FIG. 5 shows

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Speicherdrossel für Flußwandler und Tiefsetzsteller, mit nichtlinearer Gleichstromvormagnetisierungscharakteristik und mit einem Ferritkern, insbesondere Schalenkern, E-Kern, RM-Kern und U-Kern, mit einem zwischen benachbarten Stirnflächen von Kernteilen gebildeten Luftspalt, wobei die benachbarten Stirnflächen bereichsweise luftspaltlos und bereichsweise mit einem Luftspalt wechselnder Luftspalthöhe zueinander ausgerichtet sind.Storage choke for flux converters and step-down converters, with non-linear DC bias characteristics and with a ferrite core, in particular shell core, E core, RM core and U core, with an air gap formed between adjacent end faces of core parts, the adjacent end faces having an air gap in some areas and an air gap in some areas changing air gap height are aligned with each other.

Description

Die Erfindung betrifft eine Speicherdrossel, insbesondere für Flußwandler und Tiefsetzsteller, mit einem magnetisierbaren Kem, insbesondere Schalenkem, E-Kem, RM-Kem und U-Kem, mit einem zwischen benachbarten Stirnflächen von Kemteilen gebildeten LuftspaltThe invention relates to a storage inductor, in particular for flux converters and buck converters, with a magnetizable core, in particular shell core, E core, RM core and U core, with an air gap formed between adjacent end faces of core parts

Für Flußwandler und Tiefsetzsteller bestimmte Speicherdrosseln müssen eine nichtlineare Gleichstromvormagnetisierungscharakteristik aufweisen. Bei geringer Gleichstromvormagnetisierung soll dabei die Induktivität möglichst hoch, z.B. 150 pH und bei Nennlast; d.h. etwa bei 1 bis 10 A wesentlich geringer, nämlich z.B. 30 µH sein. Mit Ferritkernen mit konstantem Luftspalt, d.h. mit konstanter Luftspafthöhe ist diese Forderung nicht erfüllbar.Storage chokes intended for flux converters and buck converters must have a non-linear DC bias characteristic. With low DC bias, the inductance should be as high as possible, eg 1 50 pH and at nominal load; ie around 1 to 10 A much lower, namely 30 µH for example. This requirement cannot be met with ferrite cores with a constant air gap, ie with a constant air gap height.

Beispiele für die dieser Art erhältlichen Gleichstromvormagnetisierungscharakteristiken zeigen in Fig. 3 die Kurve a und b für einen Luftspalt mit geringer bzw. großer Spalthöhe. Bei kleinem Luftspalt ist bei geringer Gleichstromvormagnetisierung zwar die Induktivität hoch, sie sinkt jedoch sehr rasch auf Werte kleiner 30 mH ab. Bei großer Luftspalthöhe werden, wie die Kurve b zeigt, bei geringer Gleichstrom-Vormagnetisierung nur Induktivitäten von ca. 60 µH erreichtExamples of the DC bias characteristics available in this way are shown in FIG. 3 by curves a and b for an air gap with a small or large gap height. With a small air gap and low DC bias, the inductance is high, but it drops very quickly to values below 30 mH. At high air gap heights, as curve b shows, with low DC bias only inductivities of approx. 60 µH are achieved

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Speicherdrossel der eingangs genannten Art zu schaffen, welche trotz geringem Aufwand die aufgezeigten Forderungen hinsichtlich der nichtlinearen Gleichstromvormagnetisierungscharakteristik erfüllt.The present invention has for its object to provide a storage inductor of the type mentioned, which meets the requirements shown with regard to the non-linear DC bias characteristics despite little effort.

Die Erfindung sieht zu diesem Zweck bei einer Speicherdrossel gemäß Oberbegriff des Patentanspruches vor, daß die benachbarten Stimflächen z.B. der Mittelbutzen von Schalenkemen, RM-Kemen und E-Kemen, bereichsweise luftspaltlos und bereichsweise mit einem Luftspalt wechselnder Luftspafthöhe zueinander ausgerichtet sind.For this purpose, the invention provides for a storage choke according to the preamble of the claim that the adjacent end faces e.g. the central slug of shell core, RM core and E core, are aligned in some areas without an air gap and in some areas with an air gap of changing air gap height.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert.The invention is explained in more detail below on the basis of exemplary embodiments.

Es zeigt:

  • Fig. 1 ein Ausführungsbeispiel einer Speicherdrossel nach der Neuerung in schematischer und teils geschnittener Ansicht,
  • Fig. 2 eine Draufsicht auf die neuerungsgemäß gestaltete Stirnfläche 7 nach Fig. 1,
  • Fig. 3 - Kurve c die Gleichstromvormagnetisierungscharakteristik einer Speicherdrossel nach Fig. 1,2,
  • Fig. 4 in Draufsicht ein zweites Ausführungsbeispiel einer neuerungsgemäß gestalteten Stimansicht eines Mittelbutzens der Speicherdrossel nach Fig. 1,
  • Fig. 5 die Gleichstromvormagnetisierungscharakteristik einer Speicherdrossel mit einem gemäß Fig. 4 gestalteten Luftspalt für verschiedene luftspaltlose Bereiche.
It shows:
  • 1 shows an embodiment of a storage inductor according to the innovation in a schematic and partly sectional view,
  • 2 shows a top view of the end face 7 designed according to the innovation according to FIG. 1,
  • 3 - curve c the DC bias characteristic of a storage inductor according to FIG. 1,2,
  • 4 shows a top view of a second exemplary embodiment of a stimulated view of a central slug of the storage choke according to FIG. 1 designed according to the innovation,
  • 5 shows the DC bias characteristic of a storage inductor with an air gap designed according to FIG. 4 for different air gap-free areas.

Die Speicherdrossel nach Fig. 1, 2 besitzt einen Ferrit-RM-Kem mit Kemhälften 1, 2, die mit Mittelbutzen 5, 6 ausgebildet sind. Mit 3 ist ein auf die Mittelbutzen 5, 6 aufgeschobener Spulenkörper bezeichnet, der in seinem Wickelraum eine Wicklung 4 trägt.1, 2 has a ferrite RM core with core halves 1, 2, which are formed with central slugs 5, 6. With 3 a coil body pushed onto the middle slugs 5, 6 is designated, which carries a winding 4 in its winding space.

An seinem zum Mittelbutzen 6 gekehrten stimseitigen Teil ist der Mittelbutzen 5 kegelstumpfförmig geformt Mit seiner Fläche 7 liegt dieser Kegelstumpf luftspaltlos auf er Stimfläche des Mittelbutzens 6 auf. Der Winkel des Kegelstumpfes kann dabei zwischen 5 bis 60° betragen, wobei der Winkel α und die "Kontaktfläche" 7 je nach gewünschter Gleichstromvormagnetisierungscharakteristik gewählt werden.On its front-side part facing the central slug 6, the central slug 5 is shaped like a truncated cone. With its surface 7, this truncated cone lies on the end face of the central slug 6 without an air gap. The angle of the truncated cone can be between 5 and 60 °, the angle α and the “contact surface” 7 being chosen depending on the desired DC bias characteristic.

Eine durch eine Speicherdrossel gemäß Fig. 1, 2 erzielbare Gleichstromvormagnetisierungscharakteristik zeigt beispielsweise die Kurve c in Fig. 3. Bei geringer Gleichstromvormagnetisierung liegt die Induktivität in dem gewünschten Bereich von ca. 150 pH und verharrt über einen großen Strombereich bei einem Betrag von ca. 30 pH.1, 2 shows, for example, the curve c in FIG. 3. With a low DC bias, the inductance lies in the desired range of approx. 150 pH and remains at a value of approx. 30 over a large current range pH.

Die zueinander gekehrten stirnseitigen Teile, z.B. der Mittelbutzen der Kerne können auch dachartig geformt sein. Fig. 4 zeigt hierfür ein Ausführungsbeispiel, bei dem mit 8 die "ebene" Stimfläche bezeichnet ist, die sozusagen luftspaltlos gegen die zu ihr gekehrte Stimfläche des benachbarten Mittelbutzens anliegt. Die "Dachneigung" und die mit "x" bezeichnete Breite des luftspahtlosen Bereichs sind dabei wiederum in Abhängigkeit von der gewünschten Gleichstromvormagnetisierungscharakteristik gewählt Beispiele für Gleichstromvormagnetisierungscharakteristiken, wie sie bei einem Winkel von 15° und Breiten x von 1; 1,5; 3 bzw. 4 mm erhalten werden, zeigt die Fig. 5.The mutually facing end parts, for example the central slug of the cores, can also be shaped like a roof. FIG. 4 shows an embodiment for this, in which 8 denotes the "flat" end face, which, so to speak, bears without air gap against the end face of the adjacent central panel facing it. The "roof pitch" and the "x" width of the airless area are again selected depending on the desired DC bias characteristics. Examples of DC bias characteristics such as those at an angle of 15 ° and widths x of 1; 1.5; 3 or 4 mm are obtained, FIG. 5 shows

Claims (4)

1. Speicherdrossel, insbesondere für Flußwandler und Tiefsetzsteller, mit nichtlinearer Gleichstromvormagnetisierungscharakteristik und mit einem magnetisierbaren Kern, insbesondere Schalenkem, E-Kem, RM-Kem und U-Kem, mit einem zwischen benachbarten Stimflächen von Kemteilen gebildeten Luftspalt, dadurch gekennzeichnet,daß die benachbarten Stimflächen bereichsweise (7, 8) luftspaldos und bereichsweise mit einem Luftspalt wechselnder Luftspalthöhe zueinander ausgerichtet sind.1. Storage choke, in particular for forward converters and buck converters, with non-linear DC bias characteristics and with a magnetizable core, in particular shell core, E-core, RM core and U-core, with an air gap formed between adjacent end faces of core parts, characterized in that the adjacent ones Face areas (7, 8) of air spaldos and areas with an air gap of varying air gap height are aligned with each other. 2. Speicherdrossel nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine der zueinander benachbarten Stirnflächen kegelstumpfförmig ist (siehe Fig. 2).2. Storage throttle according to claim 1, characterized in that at least one of the adjacent end faces is frustoconical (see Fig. 2). 3. Speicherdrossel nach Anspruch 1 und 2, dadurch gekennzeichnet,daß mindestens eine der zueinander benachbarten Stimflächen unter einem Winkel von 5.....60° kegelstumpfförmig geformt ist (siehe Fig. 2).3. Storage choke according to claim 1 and 2, characterized in that at least one of the mutually adjacent end faces is shaped frustoconically at an angle of 5 ..... 60 ° (see Fig. 2). 4. Speicherdrossel nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine der zueinander benachbarten Stimflächen dachförmig geformt ist (siehe Fig. 4).4. Storage choke according to claim 1, characterized in that at least one of the adjacent end faces is roof-shaped (see Fig. 4).
EP85111867A 1984-09-24 1985-09-19 Accumulating inductor Withdrawn EP0185149A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848428108U DE8428108U1 (en) 1984-09-24 1984-09-24 STORAGE THROTTLE
DE8428108U 1984-09-24

Publications (1)

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EP0185149A1 true EP0185149A1 (en) 1986-06-25

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EP85111867A Withdrawn EP0185149A1 (en) 1984-09-24 1985-09-19 Accumulating inductor

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EP (1) EP0185149A1 (en)
DE (1) DE8428108U1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO1993004569A1 (en) * 1991-08-23 1993-03-04 Robert Bosch Gmbh Device for operating a gas-discharge lamp
EP0585650A1 (en) * 1992-08-22 1994-03-09 Robert Bosch Gmbh Transducer and its application

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US4939600A (en) * 1989-01-05 1990-07-03 Micropolis Corporation Efficient head positioner power amplifier
EP0385220B1 (en) * 1989-02-27 1995-05-03 TDK Corporation Coil device
DE19515226A1 (en) * 1995-04-28 1996-11-07 Thomson Brandt Gmbh High voltage transformer for a television receiver
TR199902411A2 (en) 1998-11-02 2000-06-21 Lincoln Global, Inc. Output coil and usage method for direct current welding machine
US8321449B2 (en) * 2007-01-22 2012-11-27 Jook Inc. Media rating
US7889026B2 (en) * 2008-01-08 2011-02-15 Harris Corporation Electronically variable inductor, associated tunable filter and methods
GB2463503A (en) * 2008-09-16 2010-03-17 Cambridge Semiconductor Ltd Crossed ridges in a gap of a ferrite core arrangement
CN102543370A (en) * 2010-12-22 2012-07-04 旭丽电子(广州)有限公司 Iron core and inductor
TWI539473B (en) * 2012-08-21 2016-06-21 乾坤科技股份有限公司 Variable coupled inductor
FR3103624B1 (en) 2019-11-21 2021-12-17 Commissariat Energie Atomique electromagnetic induction device

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DE3008861A1 (en) * 1980-03-07 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Transformer assembly of push pull saturating inverter - has core construction with cross section of centre limb which is locally reduced
DE3123006A1 (en) * 1981-06-10 1983-01-05 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Transformer

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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403114A1 (en) * 1974-01-23 1975-07-24 Licentia Gmbh Choke as non-linear storage element in converter - supplies variable load and has core made from stacked stampings
DE2848119A1 (en) * 1978-11-06 1980-05-14 Siemens Ag Choke for DC=DC pulsed power converter - has air gap slot at one end with faces diverging at angle selected for linear inductance-current relationship
DE3008861A1 (en) * 1980-03-07 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Transformer assembly of push pull saturating inverter - has core construction with cross section of centre limb which is locally reduced
DE3123006A1 (en) * 1981-06-10 1983-01-05 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993004569A1 (en) * 1991-08-23 1993-03-04 Robert Bosch Gmbh Device for operating a gas-discharge lamp
AU662755B2 (en) * 1991-08-23 1995-09-14 Robert Bosch Gmbh Device for operating a gas-discharge lamp
US5506479A (en) * 1991-08-23 1996-04-09 Robert Bosch Gmbh Device for operating a gas-discharge lamp
EP0585650A1 (en) * 1992-08-22 1994-03-09 Robert Bosch Gmbh Transducer and its application

Also Published As

Publication number Publication date
US4728918A (en) 1988-03-01
DE8428108U1 (en) 1985-01-03

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