EP2171732B1 - Stromkompensierte drossel und schaltungsanordnung mit einer stromkompensierten drossel - Google Patents

Stromkompensierte drossel und schaltungsanordnung mit einer stromkompensierten drossel Download PDF

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Publication number
EP2171732B1
EP2171732B1 EP08774383.7A EP08774383A EP2171732B1 EP 2171732 B1 EP2171732 B1 EP 2171732B1 EP 08774383 A EP08774383 A EP 08774383A EP 2171732 B1 EP2171732 B1 EP 2171732B1
Authority
EP
European Patent Office
Prior art keywords
current
windings
core
compensated inductor
compensated
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.)
Active
Application number
EP08774383.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2171732A1 (de
Inventor
Manfred Karasek
Markus Straub
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Publication of EP2171732A1 publication Critical patent/EP2171732A1/de
Application granted granted Critical
Publication of EP2171732B1 publication Critical patent/EP2171732B1/de
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
    • H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
    • 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
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F2017/0093—Common mode choke coil
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • It describes a current-compensated choke with at least two arranged on a common core windings, which can be traversed by the current so that cancel their magnetic fields.
  • An object to be solved is to specify a throttle in which the most complete possible cancellation of magnetic fields and the smallest possible resistance is achieved.
  • a current-compensated choke which has a plurality of current paths, each of these current paths having a plurality of parallel-connected windings.
  • the windings are wound on a common core.
  • the current paths are provided for opposite current directions.
  • the use of the throttle is also possible if the current paths have current directions in the same direction.
  • the windings are preferably chosen so that the magnetic fields generated by the current paths cancel each other out.
  • the individual windings preferably each form a complete layer around the core, the layer covering the core as completely as possible in the longitudinal direction.
  • the individual layers of windings form an array of multiple layers disposed about the core.
  • the windings belonging to different current paths are preferably arranged alternately one above the other on the core.
  • Windings belonging to a common current path are preferably not wound directly over one another on the core. For example, located over a first winding of a first current path, a first winding of a second current path, followed by the second winding of the first current path and in turn followed by the second winding of the second current path.
  • This arrangement corresponds approximately to a bifilar winding arrangement, which supports an almost complete cancellation of the magnetic fields of the windings belonging to the current paths. As a result, both a reduction in the leakage inductance of the throttle and an improvement in the quality of the throttle is achieved.
  • the windings are arranged so that windings which belong to the same current path are preferably not wound directly above or below one another on the core.
  • the core is preferably a rod-shaped core. This contains according to an embodiment ferromagnetic material.
  • the windings on the core are preferably arranged such that the magnetic fields generated by the current paths at least largely compensate each other. With opposite current paths, all windings preferably have the same winding sense. As a result, the magnetic fields generated by the current flowing in the opposite direction cancel each other out. In the case of corotating current paths, the windings belonging to the respective current paths have a different winding sense.
  • the arrangement of the windings belonging to the current paths are preferably arranged in such a way that the magnetic fields generated by the current paths cancel each other out.
  • the windings on the core are largely surrounded by a cap. This leads to a further reduction of the leakage inductance.
  • only one cover plate can be provided, which rests on the windings.
  • a cap or a plate causes an improvement of the magnetic closure of the field lines.
  • the leakage inductance is reduced.
  • the number of turns can be reduced with the same inductance by the improved conclusion, so that in addition the ohmic resistance can be reduced.
  • using a cap or Cover plate creates a small air gap, the structure comes closer to an ideal toroidal core choke.
  • the throttle has a plurality of external contacts, wherein in each case two external contacts for contacting the reactor are provided for each current path and the current paths are electrically conductively connected to the external contacts.
  • the current-compensated choke is preferably used in a circuit arrangement in which the current-compensated choke is inserted in the data lines of a data bus.
  • the first current path of the inductor is connected to a first conductor of the data line
  • the second current path of the inductor is connected in series with a second conductor of the data line.
  • the ends of a first current path of the choke are connected to a first conductor of a data line and the ends of a second current path are connected to a second conductor of a data line.
  • the electrical conductors of the data line are exposed to an electromagnetic interference source, so that the current flowing through the electrical conductors of the data line does not have the same current intensity in different directions.
  • the throttle is preferably connected to data conductors or to a bus system.
  • the data conductors may be part of a control or communication network in a motor vehicle. These are preferably CAN bus systems or FlexRay bus systems in which the circuit arrangement can be used.
  • the choke is suitable for other data transfer bus systems in which narrow limits in leakage inductance and DC resistance play a role.
  • FIG. 1 a current-compensated choke is shown in which a plurality of windings 1a, 1b, 2a, 2b are wound around a common core 3.
  • the core 3 is preferably rod-shaped and has ferromagnetic material.
  • the throttle has at its two end faces a plurality of external contacts 6a, 6b, 6c, 6d, at each of which two of the windings 1a, 1b, 2a, 2b, which are connected in parallel to a common current path 1, 2, are electrically contacted.
  • windings 1a, 1b, 2a, 2b are preferably wound up alternately on the core 3, so that directly superimposed windings 1a, 1b, 2a, 2b do not belong to one and the same current path 1, 2.
  • the individual layers of the windings 1a, 1b, 2a, 2b are arranged laterally offset from each other.
  • each winding 1a, 1b, 2a, 2b of each layer could come to lie in the intermediate space between two windings 1a, 1b, 2a, 2b of an adjacent layer and at least partially fill this intermediate space.
  • a space-saving design is offered, in which the leakage inductance can be reduced.
  • the windings 1a, 1b, 2a, 2b are arranged so that windings 1a, 1b, 2a, 2b, which are assigned to a common current path 1, 2, preferably do not lie directly above one another.
  • one possible embodiment of the choke is shown having a cap 4 which at least for the most part surrounds the wrapped core 3.
  • a cover plate may be provided on the wrapped core.
  • FIG. 3 shows a schematic representation of the windings 1a, 1b, 2a, 2b around the core 3.
  • the windings 1a, 1b, 2a, 2b are shown as layers. It should thus be shown the order of the windings 1a, 1b, 2a, 2b.
  • the arrangement of the individual windings described above makes it possible to achieve a leakage inductance which meets the required specifications, for example for bus systems in motor vehicles.
  • the optimization is done here only in terms of leakage inductance.
  • a combination of the first winding with the fourth winding and a combination of the second winding with the third winding would be best, but the effect of the low leakage inductance would be lost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Power Conversion In General (AREA)
EP08774383.7A 2007-08-01 2008-06-26 Stromkompensierte drossel und schaltungsanordnung mit einer stromkompensierten drossel Active EP2171732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007036052A DE102007036052A1 (de) 2007-08-01 2007-08-01 Stromkompensierte Drossel und Schaltungsanordnung mit einer stromkompensierten Drossel
PCT/EP2008/058209 WO2009015955A1 (de) 2007-08-01 2008-06-26 Stromkompensierte drossel und schaltungsanordnung mit einer stromkompensierten drossel

Publications (2)

Publication Number Publication Date
EP2171732A1 EP2171732A1 (de) 2010-04-07
EP2171732B1 true EP2171732B1 (de) 2017-09-06

Family

ID=39789737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08774383.7A Active EP2171732B1 (de) 2007-08-01 2008-06-26 Stromkompensierte drossel und schaltungsanordnung mit einer stromkompensierten drossel

Country Status (6)

Country Link
US (1) US9305695B2 (enrdf_load_stackoverflow)
EP (1) EP2171732B1 (enrdf_load_stackoverflow)
JP (1) JP5356382B2 (enrdf_load_stackoverflow)
CN (1) CN101772813B (enrdf_load_stackoverflow)
DE (1) DE102007036052A1 (enrdf_load_stackoverflow)
WO (1) WO2009015955A1 (enrdf_load_stackoverflow)

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DE102011082045A1 (de) * 2011-09-02 2013-03-07 Schmidhauser Ag Drossel und zugehöriges Herstellungsverfahren
US20130082814A1 (en) * 2011-09-30 2013-04-04 Piotr Markowski Multi-winding magnetic structures
DE102014103324B4 (de) 2014-03-12 2022-11-24 Tdk Electronics Ag Induktives Bauelement und Verfahren zum Herstellen eines induktiven Bauelements
USD798814S1 (en) 2014-12-02 2017-10-03 Tdk Corporation Coil component
JP2017017062A (ja) * 2015-06-26 2017-01-19 Tdk株式会社 パルストランス
US9899131B2 (en) * 2015-07-20 2018-02-20 Cyntec Co., Ltd. Structure of an electronic component and an inductor
JP6640008B2 (ja) * 2016-03-29 2020-02-05 岡山技研株式会社 多重多相コイル
JP1578928S (enrdf_load_stackoverflow) * 2016-07-14 2017-06-12
JP7021605B2 (ja) * 2018-06-11 2022-02-17 株式会社村田製作所 コイル部品
JP7272789B2 (ja) * 2018-12-28 2023-05-12 太陽誘電株式会社 巻線型のコイル部品及びドラムコア
USD920911S1 (en) 2019-01-23 2021-06-01 Sumida Corporation Coil component
JP7363582B2 (ja) * 2020-03-03 2023-10-18 Tdk株式会社 コイル部品及びその製造方法
JP7456195B2 (ja) * 2020-03-03 2024-03-27 Tdk株式会社 コイル部品
USD1033357S1 (en) 2020-09-09 2024-07-02 Tdk Corporation Coil component

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Also Published As

Publication number Publication date
JP2010534947A (ja) 2010-11-11
WO2009015955A1 (de) 2009-02-05
US20100194517A1 (en) 2010-08-05
EP2171732A1 (de) 2010-04-07
CN101772813A (zh) 2010-07-07
JP5356382B2 (ja) 2013-12-04
DE102007036052A1 (de) 2009-02-05
CN101772813B (zh) 2013-03-13
US9305695B2 (en) 2016-04-05

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