EP2171730B1 - Bobine électrique - Google Patents

Bobine électrique Download PDF

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Publication number
EP2171730B1
EP2171730B1 EP08775091.5A EP08775091A EP2171730B1 EP 2171730 B1 EP2171730 B1 EP 2171730B1 EP 08775091 A EP08775091 A EP 08775091A EP 2171730 B1 EP2171730 B1 EP 2171730B1
Authority
EP
European Patent Office
Prior art keywords
winding
coil
contact
wire
electrical supply
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
EP08775091.5A
Other languages
German (de)
English (en)
Other versions
EP2171730A1 (fr
Inventor
Clemens Scherer
Yvan Pillet
Guido KÄUFER
Daniel Maeder
Friedrich Durand
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Publication of EP2171730A1 publication Critical patent/EP2171730A1/fr
Application granted granted Critical
Publication of EP2171730B1 publication Critical patent/EP2171730B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
    • 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
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an electrical coil according to the preamble of patent claim 1 and a method for contacting a coil and an arrangement of a coil and two contacts of an electrical supply line.
  • Object of the present invention is to design a generic coil so that the manufacturing process is simplified and the error rate of the finished product is reduced.
  • the coil should be contacted as easily as possible. This has hitherto been particularly difficult when wires having a diameter of 50 ⁇ m or less are used, because such thin wires are difficult to contact with conventional methods due to their lack of rigidity. Both the production of the coils and their Incidentally, contacting should also be easy, quick and, above all, error-free, even in the case of production of large series.
  • At least the main winding is wound directly on the spool core.
  • the bobbin can in principle have any cross-section, in question are in particular a rectangular or a circular cross-section.
  • the bobbin has been preferably processed (trowalformat) using a vibratory finishing process, so that its surface is free of burrs and bumps.
  • the coil core is provided, at least in the region of the main winding, with an insulation layer preferably applied to the coil core, and if at least the main winding, preferably also the start winding, is wound onto the insulation layer.
  • This insulating layer increases the reliability of the coil assembly by reducing the risk that the insulation surrounding the winding wire will chafe on the coil core. It takes the applied directly on the spool core Insulation layer, in contrast to a provided in the prior art additional bobbin a only insignificant additional radial space.
  • the insulating layer may consist of a wound around the bobbin suitable insulating tape.
  • a polymer layer which is applied to the coil core by means of a suitable coating method.
  • a parylene coating that has been produced by chemical vapor deposition is particularly well suited. This type of coating is characterized, inter alia, by its good electrical insulation properties even with very thin layers.
  • the end winding surrounds a portion of the main winding.
  • the position of the end winding on the main winding can be freely selected, so that any, only determined by the requirements of the intended application of the coil position of the end winding can be selected.
  • this arrangement allows a comparatively compact design.
  • both the end and the start winding lie on the outside of the central main winding. This arrangement results in an overall flatter coil, which depending on the available space can be beneficial.
  • Another particularly advantageous embodiment of the invention is characterized in that the respective number of turns of the coil wire of the start winding and the end winding is dimensioned such that the respective electrical effectiveness of the start winding and the end winding after contacting with respective electrical leads within predetermined tolerances , In this way, the electrical efficiency of the entire coil can be precisely determined during manufacture and kept within a predetermined tolerance range so that the manufacturing quality is significantly improved over conventional manufacturing methods.
  • the coil wire is coated as usual with a lacquer, preferably with a so-called baked enamel, that is with a glue coat whose adhesive effect is activated by heat.
  • the present invention is particularly suitable for very small coils using very thin wire according to the invention having a diameter in the range of less than 50 ⁇ m.
  • a first contact of an electrical lead to be connected to the start winding is electrically conductively connected to at least one outer turn of the start winding, and a second contact to be connected to the end winding an electrical lead is electrically connected to at least one outer turn of the end winding.
  • connection between the contacts of the electrical supply line and the starting or the end winding is produced according to the invention by welding or soldering, wherein in each case a plurality of turns of the starting or the end winding can be electrically connected to the respective contacts of the electrical supply line ,
  • a suitable laser is used for welding or soldering.
  • the contacts of the electrical lead in each case in a mounting area a recess, wherein the first connection area is placed on the winding to be contacted when making the connection, that this depression contacts the winding, and then a laser beam in Area of the recess is directed to the mounting area.
  • This depression is preferably channel-shaped, with a V-shaped or U-shaped cross-section having proved to be particularly advantageous.
  • the attachment region of the contact can be formed from a simple metal sheet, for example a copper sheet which is provided with the V-shaped or a U-shaped profile to form the preferably groove-shaped recess.
  • the connection is then a welded connection, since the copper sheet is directly connected to one or more coil wires.
  • a laser with a correspondingly high energy density must be used.
  • the attachment area in the region of its recess can also be on its outside, i. be coated on the side facing in the direction of the coil with a solder, so that with the help of the laser, a solder joint is produced.
  • a brazing alloy such as the silver-phosphor mixture sold under the trade name Silfos
  • a soft solder such as, for example, tin
  • the possibly coated with a solder sheet heats up, so that the paint or baked enamel layer, with which the wires are coated, becomes plastic.
  • the sheet sinks with the preferably groove-shaped recess in front between the turns of the winding to be contacted and displaces the plasticized baked enamel. The result is a welded or soldered connection between the provided with a groove attachment region of the contact and the wires of the uppermost turns of the winding to be contacted, via which the desired electrical connection is made.
  • the quality of the weld or solder connection between the wires of the coil and the contacts is determined primarily by the coupling of the laser beam into the material. Uneven surface structures result in an uneven and hardly predictable coupling. Due to the recess formed in the mounting area a significant improvement is achieved here.
  • the laser beam directed into the depression becomes on its lateral walls reflected, so that the energy evenly distributed in a well-defined area. A particularly good contact is achieved with a groove-shaped depression. This can basically have any cross section. To be particularly advantageous, a substantially V-shaped profile has been found, a U-shaped cross-section is also conceivable.
  • the number of electrically conductively connected to the respective contact turns is selected so that the electrical properties of the entire coil are within predetermined tolerances.
  • an electrical quantity, such as the resistance, of the coil can be measured. If one reaches the desired value, the laser beam is interrupted, so that the joining process is interrupted. In this way, the coil can be assembled so that the start winding and the end winding are negligible with respect to the overall electrical properties of the coil. The electrical properties of the coil are thus determined almost exclusively by the main winding.
  • the first contact of the electrical supply line to be connected to the start winding is electrically conductively connected to at least one winding located below the outer windings of the starting winding.
  • the second contact of the electrical supply line to be connected to the end winding is electrically conductively connected to at least one winding located below the outer windings of the end winding.
  • the present invention also relates to an arrangement of a coil of the type described and two contacts of an electrical lead, wherein a first contact with the start winding of the coil is electrically connected, and a second contact with the end winding of the coil is electrically connected: both contacts each have a preferably groove-shaped recess in a mounting area, and this depression is located in each case between the outer turns of the start or end winding.
  • the coil 1 has a coil core 10, which preferably consists of a silicon-iron alloy (SiFe) or a nickel-iron alloy (NiFe).
  • the surface of the bobbin is tumbled (trowelled) so that no burrs or bumps remain.
  • the bobbin 10 is provided along the coil axis A with a central coil portion 11.
  • the central coil portion 11 is provided at its periphery with an insulating layer 12 which is formed by an electrically insulating adhesive tape which is adhered to the periphery of the central coil portion 11.
  • the insulating layer 12 may also be otherwise applied, for example by coating or painting the central coil section 11, e.g. with a parylene coating, as already mentioned above.
  • a spool core 10 is shown with a rectangular cross-section. However, a circular or oval cross-section is also conceivable. Incidentally, the insulating layer 12 may be omitted.
  • a start winding 14 which comprises a plurality of turns of an electrically conductive coil wire, is wound coaxially around the coil axis A on the insulation layer 12.
  • the first dashed line in the figure The other end of the start winding 14 is guided out laterally from the start winding 14 in the axial direction and forms a first connecting wire 15 between the start winding 14 and a main winding 16 spaced therefrom in the axial direction of the same.
  • the main winding 16 consists of a plurality of axially juxtaposed and radially superposed turns of the coil wire, which is the same winding wire, as the coil wire of the start winding 14.
  • the coil wire is coated with a so-called baked enamel or adhesive coating.
  • the main winding 16 extends to the vicinity of the second end of the central coil portion 11 and is also wound on the insulating layer 12 surrounding the central coil portion 11.
  • the end of the main winding 16 lies on the radially outer circumference of the main winding 16 and is guided there as a second connecting wire 17 to a structurally predetermined location on the outer circumference of the main winding 16, where the coil wire forms a consisting of a plurality of windings end winding 18, the Main winding 16 surrounds.
  • the second free end 19 of the three coil wires and the two connecting wires forming winding wire is thus located on the radially outer periphery of the end winding 18.
  • the end winding may also be arranged symmetrically to the start winding. In this case, it does not surround the main winding, but is located in the region of the second axial end of the central coil section and thus axially adjacent to the main winding.
  • the basic principle is the same in both variants, since only one wire is used in this variant as well. Which arrangement of start, main and end winding you choose depends in particular on the existing installation space and possible specifications of the position of the contacts.
  • start winding 14 and the end winding 18 are each with in Fig. 2 shown contacts 20, 20 'a electrical supply by welding or soldering electrically connected.
  • the other end of the contacts 20, 20 ' is connected to electrical leads, not shown here.
  • the tongues 22, 22 ' that are used to make contact with the coil according to the invention that are important to the present invention.
  • These tongues 22, 22 ' are in a mounting area, which in Fig. 3 enlarged and shown in section, provided with a groove-shaped recess 24 which has a substantially V-shaped cross-section.
  • This V-shaped groove extends in relation to the tongue 22 or 22 'in the longitudinal direction, and thus parallel to the turns of the start or development 14, 18 (see. FIGS. 2 and 3 ).
  • the groove-like recess 24 in the attachment region of the contacts although a V-shaped cross section, a U-shaped cross-section, any other channel shapes or a simple crater-like depression are also conceivable.
  • the possibly pre-heated mounting portion of the tongue 22 of the contact 20 is pressed radially onto the end winding 18, wherein the groove-shaped recess 24 comes to rest with its lowest point on the outer turns of the end winding 18.
  • the radial contact pressure is in FIG. 3 indicated by arrows F.
  • a laser beam 40 is directed into the V-shaped recess.
  • the thin copper sheet of the tongue 22 is heated in the region of the recess 24. Due to the "bundling" of the laser beam through the side walls of the channel-shaped Deepening results in a uniform heating and a uniform and predictable coupling of the laser beam 40.
  • the baked-enamel shell softens around the wires of those turns 27 which lie directly below the fastening region of the contact 20.
  • the attachment area thus penetrates between the turns by the action of contact pressure and laser beam 40 with the V-shaped tip in front, displacing the plasticized baked enamel. An uncontrolled caking of the wires together is avoided, and obtained by the plasticized and displaced enamel shell the desired stripping of the contacted wire.
  • solder joint can be prepared, in which case the pointing in the direction of the coil outside of the tongue 22 is coated in advance with a solder.
  • This solder is softened by the heat generated by the laser beam 40 and in principle also bonds with the wires of the winding to be contacted, as described above for the uncoated tongue 22.
  • turns 27 are electrically contacted.
  • the above factors can be set to contact as many turns as required to maintain the electrical properties of the coil (e.g., impedance or total electrical resistance) within predetermined tolerances. For example, during the contacting process, one can electronically monitor the resistance or other electrical size of the coil, giving a signal to complete the welding or soldering process when a desired value is reached.
  • Both the position of the start winding 13 along the axis A on the central coil section 11, as well as the position of the end winding 18 in the axial direction on the main winding 16 is arbitrary, so that this situation after the constructive boundary conditions of the later Application of the coil can judge, for example, the position of the electrical leads at the later mounting location of the coil is decisive.
  • the number of turns of the start winding 14 and the end winding 18 is calculated so that the electrical effectiveness of both the start winding 14, and the end winding 18 is only within predetermined tolerances, so that the start winding 14 and the end winding 18 with respect to the entire electrical properties of the coil are insignificant.
  • the electrical properties of the coil are thus determined almost exclusively by the main winding 16.
  • the device according to the invention may also assume other than the above-described embodiments.
  • the device may in particular have features that represent a combination of the respective individual features of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Manufacture Of Motors, Generators (AREA)

Claims (13)

  1. Bobine électrique comprenant :
    - un noyau de bobine (10) ;
    - un enroulement principal (16) présentant un fil de bobine électriquement conducteur entourant le noyau de bobine (10) ;
    - un enroulement de départ (14) présentant un fil de bobine électriquement conducteur entourant le noyau de bobine (10), agencé pour être relié à un premier contact ; et
    - un enroulement terminal (18) présentant un fil de bobine électriquement conducteur entourant le noyau de bobine (10) agencé pour être relié à un deuxième contact ;
    caractérisé en ce que :
    le fil de bobine de l'enroulement principal (16), le fil de bobine de l'enroulement de départ (14) et le fil de bobine de l'enroulement terminal (18) sont formés d'un fil d'enroulement continu, et en ce qu'au moins l'enroulement principal (16), de préférence également l'enroulement de départ (14), est enroulé directement sur le noyau de bobine (10), le fil de bobine présentant un diamètre d'au plus 50 µm.
  2. Bobine électrique selon la revendication 1, caractérisée en ce que le noyau de bobine (10) est muni, au moins dans la région de l'enroulement principal (16), d'une couche d'isolation (12) rapportée de préférence sur le noyau de bobine (10), et en ce qu'au moins l'enroulement principal (16), de préférence aussi l'enroulement de départ (14), est enroulé sur la couche d'isolation (12).
  3. Bobine électrique selon la revendication 2, caractérisée en ce que la couche d'isolation (12) est une couche réalisée en un matériau de
  4. Bobine électrique selon l'une des revendications précédentes, caractérisée en ce que l'enroulement terminal (18) entoure une section de l'enroulement principal (16).
  5. Bobine électrique selon l'une des revendications précédentes, caractérisée en ce que le nombre respectif d'enroulements du fil de bobine de l'enroulement de départ (14) et l'enroulement terminal (18) est dimensionné de manière que l'efficacité électrique respective de l'enroulement de départ (14) et de l'enroulement terminal (18) se trouvent dans des tolérances prédéterminées après la réalisation d'un contact avec les alimentations électriques respectives.
  6. Procédé pour contacter une bobine selon l'une des revendications précédentes, dans lequel un premier contact (20') d'une alimentation électrique, destinée à être reliée à l'enroulement de départ (14), est reliée électriquement à au moins un enroulement extérieur de l'enroulement de départ (14), et
    dans lequel un deuxième contact (20) d'une alimentation électrique destinée à être reliée à un enroulement terminal (18) est reliée électriquement à au moins un enroulement extérieur (27) de l'enroulement terminal (18),
    caractérisé en ce que la liaison est réalisée par soudage ou brasage, de préférence avec utilisation d'un rayon laser (40), dans lequel plusieurs enroulements (27) de l'enroulement de départ ou de l'enroulement terminal sont respectivement reliés électriquement aux contacts respectifs (20,20') de l'alimentation électrique.
  7. Procédé pour contacter une bobine selon la revendication 6, caractérisé en ce que les contacts (20, 20') de l'alimentation électrique présentent un évidement (24) dans une région de fixation (22, 22') respective, dans lequel, pendant la réalisation de la connexion, la région de fixation est tout d'abord placée sur l'enroulement (14, 18) à contacter de manière que l'évidement (24) touche l'enroulement (14, 18), et ensuite un faisceau laser (40) est dirigé sur la région de fixation (22, 22') dans la région de l'évidement (24).
  8. Procédé pour contacter une bobine selon la revendication 7, caractérisé en ce que l'évidement (24) présente la forme d'une rainure et présente de préférence un profil essentiellement en V ou en U.
  9. Procédé pour contacter une bobine selon la revendication 7 ou 8, caractérisé en ce que la région de fixation (22, 22') est recouverte d'une soudure dans sa région de l'évidement (24) sur son côté extérieur dirigé vers la bobine d'une charge.
  10. Procédé selon l'une des revendications 6 à 9, caractérisé en ce que le premier contact (20') de l'alimentation électrique destiné à être relié avec l'enroulement de départ (14) est relié électriquement avec au moins un enroulement situé sous les enroulements extérieurs de l'enroulement de départ (18).
  11. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que le deuxième contact (20) de l'alimentation électrique destiné à être relié avec l'enroulement terminal (18) est relié électriquement avec au moins un enroulement situé sous les enroulements externes de l'enroulement terminal (18).
  12. Procédé pour contacter une bobine selon l'une des revendications 6 à 11, caractérisé en ce que le nombre d'enroulements reliés électriquement au contact (20, 20') respectif est choisi de manière que les propriétés électriques de l'ensemble de la bobine se trouvent dans des tolérances prédéterminées.
  13. Arrangement comprenant une bobine selon l'une des revendications 1 à 5 et deux contacts (20, 20') d'une alimentation électrique, dans lequel un premier contact (20') est relié électriquement à l'enroulement de départ (14) de la bobine et dans lequel une deuxième contact (20) est relié électriquement à l'enroulement terminal (18) de la bobine, les deux contacts (20, 20') présentant chacun un évidement (24) de préférence en forme de rainure dans une zone de fixation (22, 22') respective, dont le point le plus bas vu en coupe se trouve entre les enroulements externes de l'enroulement de départ respectivement de l'enroulement terminal.
EP08775091.5A 2007-07-18 2008-07-15 Bobine électrique Active EP2171730B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01167/07A CH697212A5 (de) 2007-07-18 2007-07-18 Elektrische Spule.
PCT/EP2008/059232 WO2009010508A1 (fr) 2007-07-18 2008-07-15 Bobine électrique

Publications (2)

Publication Number Publication Date
EP2171730A1 EP2171730A1 (fr) 2010-04-07
EP2171730B1 true EP2171730B1 (fr) 2017-04-05

Family

ID=39105721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08775091.5A Active EP2171730B1 (fr) 2007-07-18 2008-07-15 Bobine électrique

Country Status (8)

Country Link
US (1) US8269591B2 (fr)
EP (1) EP2171730B1 (fr)
JP (1) JP2011515013A (fr)
CN (1) CN101861631B (fr)
CH (1) CH697212A5 (fr)
DE (1) DE202007015507U1 (fr)
HK (1) HK1149628A1 (fr)
WO (1) WO2009010508A1 (fr)

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Publication number Priority date Publication date Assignee Title
JPS5718685Y2 (fr) * 1977-07-13 1982-04-19
US4759120A (en) * 1986-05-30 1988-07-26 Bel Fuse Inc. Method for surface mounting a coil
US4728916A (en) * 1986-06-05 1988-03-01 Lectron Products, Inc. Solenoid operated fluid control valve
JP3467502B2 (ja) * 2000-03-21 2003-11-17 スミダコーポレーション株式会社 微小アンテナコイル
JP5004040B2 (ja) 2000-12-20 2012-08-22 邦文 小宮 チョークコイルの設計方法
JP3590010B2 (ja) * 2001-10-10 2004-11-17 第一高周波工業株式会社 管内周面加熱用誘導子
JP3973027B2 (ja) * 2002-10-25 2007-09-05 Ｔｄｋ株式会社 表面実装型コモンモードノイズフィルタ
JP3973028B2 (ja) * 2002-10-25 2007-09-05 Ｔｄｋ株式会社 表面実装型コモンモードノイズフィルタ
JP2004241587A (ja) * 2003-02-05 2004-08-26 Murata Mfg Co Ltd 巻線型コイル部品
US7209090B2 (en) 2003-06-16 2007-04-24 Sensormatic Electronics Corporation High efficiency core antenna and construction method
US7551053B2 (en) * 2003-11-05 2009-06-23 Tdk Corporation Coil device
JP4630620B2 (ja) * 2004-09-30 2011-02-09 中紀精機株式会社 ノイズ除去デバイス
JP4924893B2 (ja) * 2007-06-27 2012-04-25 Ｔｄｋ株式会社 コイル部品の製造方法及びコイル部品の製造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2171730A1 (fr) 2010-04-07
US8269591B2 (en) 2012-09-18
JP2011515013A (ja) 2011-05-12
HK1149628A1 (en) 2011-10-07
CN101861631B (zh) 2013-04-03
WO2009010508A1 (fr) 2009-01-22
DE202007015507U1 (de) 2008-02-21
CH697212A5 (de) 2008-06-25
CN101861631A (zh) 2010-10-13
US20100265021A1 (en) 2010-10-21

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