EP1732089A1 - Drosselspule mit gewickeltem Draht - Google Patents

Drosselspule mit gewickeltem Draht Download PDF

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Publication number
EP1732089A1
EP1732089A1 EP05012257A EP05012257A EP1732089A1 EP 1732089 A1 EP1732089 A1 EP 1732089A1 EP 05012257 A EP05012257 A EP 05012257A EP 05012257 A EP05012257 A EP 05012257A EP 1732089 A1 EP1732089 A1 EP 1732089A1
Authority
EP
European Patent Office
Prior art keywords
coil
core
choke coil
conductor
cores
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
EP05012257A
Other languages
English (en)
French (fr)
Other versions
EP1732089B1 (de
Inventor
Hsin-Chen Chen
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.)
UWB TECHNOLOGY Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE602005010677T priority Critical patent/DE602005010677D1/de
Priority to AT05012257T priority patent/ATE412967T1/de
Priority to EP05012257A priority patent/EP1732089B1/de
Publication of EP1732089A1 publication Critical patent/EP1732089A1/de
Application granted granted Critical
Publication of EP1732089B1 publication Critical patent/EP1732089B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F27/292—Surface mounted devices
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • the present invention relates to a wire wound choke coil, and more particularly, to a wire wound choke coil capable of shortening the fabrication process so as to save production cost thereby facilitating mass production.
  • the terminals of a conventional wire wound choke coil or air core coil are usually constructed straightly parallel with each other or flexed in a straight angle so as to connect with the electrical circuit board by soldering in the form of Dip type or SMD(Surface Mount Device) type.
  • the overall structure of a choke coil is made of winding an insulated conductor directly around a core and then fixed with a binder.
  • a choke coil or an air core coil constructed as such is no more able to meet with the requirement today's calling for compactness is size by reason unabling to shorten its fabrication process by automation, therefore, lowering the production cost by mass production is quite impossible.
  • Fig. l(a) shows a conventional wire wound choke coil 7.
  • an insulated conductor 71 can be directly wound on a core 72 and then stuck to it with a binder that can avoid parting of the coil 71.
  • the two terminals 711 (electrodes) of the coil can only be formed into Dip type.
  • the choke coil 7 is small sized as 0805, 0603, 0402(EIA) which being too small to wind the insulated conductor 71 around the core 72, the Dip type is practically difficult.
  • Fig. 2(a), (b) and Fig. 3(a), (b) show existing compact SMD air core coils 8, 9, the sizes are made as small as 0805, 0603, 0402 (EIA), when inserting the core into a coil 8, 9 for assembling a choke coil, two terminals (electrodes) for surface mount will be distorted thereby unabling to keep in parallel to the electrical circuit board for soldering. If the core has an outer diameter smaller than the inner diameter of the coils 8, 9, due to too small in size the work will be so hard that the binder applied after insertion of the core might diffuse and leak so as to decrease the conductance of the terminals which being contaminated by the binder.
  • EIA 0805, 0603, 0402
  • the inventor has plunged in this matter for years to studying and improving these defects and come up with a novel wire wound choke coil as provided in this invention to eliminate the defects mentioned above.
  • Main object of the present invention is to provide a wire wound choke coil capable of shortening fabrication process so as to save production cost thereby benefiting the mass production.
  • Another object of the present invention is to use an insulated conductor, whose conductor being pre-plated with a layer of metal, to form a choke coil so that its two terminals can be directly connected to an electrical circuit board without soldering or plating after stripping off the insulation film.
  • a metallic conductor is used to form a coil.
  • the surface of the conductor is pre-plated with metallic material such as gold, silver, nickel, or tin before covered with an insulation layer on it so as to form a plated conductor enclosed with an insulated film.
  • metallic material such as gold, silver, nickel, or tin
  • the coil leads at two terminals (electrodes) are left with a length slightly less than one turn to save the time for stripping longer insulation film.
  • the wire wound choke coil 1 of the present invention comprises a coil 11 and a core 12.
  • the coil 11 is made of an insulated conductor spirally wound closely or loosely with a predetermined number of turns and diameter, and extending both terminals 111 (electrodes) with a length slightly less than one turn (see Fig. 4(b)).
  • the conductor used for the coil 11 is pre-plated with a layer of metals selected one from the group gold, silver, tin, nickel or others before covering with an insulation film, so as to form two solderable terminals 111 directly and quickly connect to an electrical circuit board after stripping off the insulation film without any other treatment.
  • the size of the conductor is selective according to the requirement.
  • the coil 11 can be wound of a twisted insulated conductors (Litz wire), or if required, formed into a multi-layer coil by repeatedly winding back and forth with an insulated conductor, or with different kind and sized insulated conductors.
  • the core 12 with two chamfered or filleted end surfaces 121 at both ends, and with an outer diameter slightly larger than the inner diameter of the coil 11, is easily inserted longitudinally into the inner hollow cavity of the coil 11 and forcibly embraced by the coil 11 by its resiliency without worry of parting.
  • the two end surfaces of the core 12 can be provided with a plated layer 122.
  • the core 12 is formed of ferrite, ceramic, glass or others.
  • both terminals 111 electrodes
  • the plated layer 122 on both end surfaces of the core 12 are provided with solder plating to form a united terminal electrode so as to facilitate an electrical connection with the circuit board.
  • the length of the core 12 is not necessarily be equal to that of the coil 11, if the former is slightly longer than the latter, and emerges out of the latter, the emerged part can be provided with the plated layer 122 so as to facilitate soldering the core 12 firmly on the circuit board.
  • a pre-plated square hollow metal conductor 2 can be employed to shackle the emerged part of the core 12 so as to perform soldering work stably.
  • the choke coil of the present invention configurates its transverse cross sections of coil 11 and core 12 into an ellipse (see Figs. 7(a), (b)), a square (see Figs. 8(a), (b)) or others.
  • the fabrication of the wire wound choke coil of the present invention comprises the following steps:
  • two units of choke coil 1 are combined to one unit of common mode choke coil using two square magnetic plates 10.
  • the core 12 is slightly longer than coil 11 with its two ends emerged out of the coil 11.
  • the square magnetic plate 10, which being made of the same material as core 12, is provided with a first hole 101 and a second hole 102 for engaging the protruded portions of the core 12 at both ends.
  • the two cores 12 shown in Figs. 12(a), (b) can be replaced by two approximately U shaped magnetic elements 20 each having two magnetic cores 201. After inserting each magnetic core 201 into the corresponding coil 11 from both ends, the whole structure is enclosed with a resin 4 thereby finishing the fabrication of a common mode choke coil.
  • the two cores 12 shown in Figs. 12(a), (b) may be replaced by one approximately U shaped magnetic element 30 provided with two magnetic cores 301.
  • the U shaped magnetic element 30 is assembled with the two coils 11 by inserting each of its two magnetic cores 301 into the corresponding coil 11 until both tips of the magnetic cores 301 are emerged out of the opposite side of the coils 11. After the protruded tips of the two magnetic cores 301 are engaged to a square magnetic plate 10 of same material, the whole structure is enclosed with the resin 4 thereby completing the fabrication of a common mode choke coil.
  • the choke coil provided by the present invention can be accompanied with a capacitor in one package so as to form a SMD filter applicable to various frequency band-width and rated voltage, rated current.
  • the land pattern on the circuit board is designed in the version that it can be applicable to both packaged or a separated type by only changing solder mask.
  • the packaged filter can be used for better appearance and more convenience.
  • the choke coil of the invention and other accompanied components can be used for a lower cost.
  • the choke coil 1 and a capacitor 51 are packed together to form a L type filter 5, its land pattern on the circuit board is shown in Fig. 16(a).
  • the choke coil 1 and the capacitor 51 can be mounted on the same circuit board so as to cut down extra cost for packaging, which provides the users not only better appearance and convenience (packaged filter), but also decrease the cost (separated type).
  • This principle is not only applicable to a L type filter, but also to those ⁇ type and T type filters composed of a plurality of components.
  • the wire wound choke coil according to the present invention has several noteworthy advantages compared to that provided by the prior art:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Windings For Motors And Generators (AREA)
EP05012257A 2005-06-07 2005-06-07 Drosselspule mit gewickeltem Draht Not-in-force EP1732089B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602005010677T DE602005010677D1 (de) 2005-06-07 2005-06-07 Drosselspule mit gewickeltem Draht
AT05012257T ATE412967T1 (de) 2005-06-07 2005-06-07 Drosselspule mit gewickeltem draht
EP05012257A EP1732089B1 (de) 2005-06-07 2005-06-07 Drosselspule mit gewickeltem Draht

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05012257A EP1732089B1 (de) 2005-06-07 2005-06-07 Drosselspule mit gewickeltem Draht

Publications (2)

Publication Number Publication Date
EP1732089A1 true EP1732089A1 (de) 2006-12-13
EP1732089B1 EP1732089B1 (de) 2008-10-29

Family

ID=35033531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05012257A Not-in-force EP1732089B1 (de) 2005-06-07 2005-06-07 Drosselspule mit gewickeltem Draht

Country Status (3)

Country Link
EP (1) EP1732089B1 (de)
AT (1) ATE412967T1 (de)
DE (1) DE602005010677D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110718386A (zh) * 2019-10-21 2020-01-21 通友智能装备(江苏)有限公司 一种一体成型电感器的制作工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238485A (en) * 1963-08-23 1966-03-01 Automatic Elect Lab Bobbin and core assembly
DE4241604A1 (de) * 1992-12-10 1994-06-16 Kaschke Kg Gmbh & Co Stabkerndrossel für Entstörzwecke
JP2000306734A (ja) * 1999-04-21 2000-11-02 Tamura Seisakusho Co Ltd コモンモードコイル
EP1403887A1 (de) * 2001-06-06 2004-03-31 Kunifumi Komiya Spulenfilter und verfahren zu seiner herstellung
JP2004214334A (ja) * 2002-12-27 2004-07-29 Murata Mfg Co Ltd チョークコイルを用いた回路およびチョークコイル

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238485A (en) * 1963-08-23 1966-03-01 Automatic Elect Lab Bobbin and core assembly
DE4241604A1 (de) * 1992-12-10 1994-06-16 Kaschke Kg Gmbh & Co Stabkerndrossel für Entstörzwecke
JP2000306734A (ja) * 1999-04-21 2000-11-02 Tamura Seisakusho Co Ltd コモンモードコイル
EP1403887A1 (de) * 2001-06-06 2004-03-31 Kunifumi Komiya Spulenfilter und verfahren zu seiner herstellung
JP2004214334A (ja) * 2002-12-27 2004-07-29 Murata Mfg Co Ltd チョークコイルを用いた回路およびチョークコイル

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 14 5 March 2001 (2001-03-05) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110718386A (zh) * 2019-10-21 2020-01-21 通友智能装备(江苏)有限公司 一种一体成型电感器的制作工艺

Also Published As

Publication number Publication date
ATE412967T1 (de) 2008-11-15
DE602005010677D1 (de) 2008-12-11
EP1732089B1 (de) 2008-10-29

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