EP0393599A2 - Bobine électrique montable en surface - Google Patents

Bobine électrique montable en surface Download PDF

Info

Publication number
EP0393599A2
EP0393599A2 EP90107283A EP90107283A EP0393599A2 EP 0393599 A2 EP0393599 A2 EP 0393599A2 EP 90107283 A EP90107283 A EP 90107283A EP 90107283 A EP90107283 A EP 90107283A EP 0393599 A2 EP0393599 A2 EP 0393599A2
Authority
EP
European Patent Office
Prior art keywords
coil
plastic
electrical
magnetic material
coil according
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
EP90107283A
Other languages
German (de)
English (en)
Other versions
EP0393599B1 (fr
EP0393599A3 (fr
Inventor
Gerhard Dipl.-Ing. Meindl
Ernst Dipl.-Ing. Schmotz
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
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT90107283T priority Critical patent/ATE91038T1/de
Publication of EP0393599A2 publication Critical patent/EP0393599A2/fr
Publication of EP0393599A3 publication Critical patent/EP0393599A3/fr
Application granted granted Critical
Publication of EP0393599B1 publication Critical patent/EP0393599B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F2017/048—Fixed inductances of the signal type  with magnetic core with encapsulating core, e.g. made of resin and magnetic powder

Definitions

  • the invention relates to a surface-mountable, plastic-encased electrical coil with a hollow cylindrical coil body as a winding support and with a coil body flange that can be placed on a printed circuit board and preferably with electrical connections led out laterally.
  • SMD technology is becoming increasingly important, i.e. that increasingly unwired components are applied to the conductor track side of a circuit board and are usually mounted on it by wave soldering.
  • Novel circuit concepts, corresponding placement machines and a wide range of types of unwired components enable the transition to this new assembly technology.
  • SMD coils surface-mountable coils
  • SMD coils have a ferrite core in the hollow cylindrical part of the coil body and the entire coil, with the exception of its electrical connections, is coated with plastic.
  • This requires the manufacture and use of ferrite cores and, in addition, the work step of the cladding, which, taken together, requires a considerable amount of production technology.
  • the present invention is based on the object of providing an electrical coil of the type mentioned at the outset, which can be produced with considerably less manufacturing outlay than the known coil and is nevertheless distinguished by high quality.
  • the invention provides for a coil according to the preamble of claim 1 that the hollow cylindrical interior of the coil body and the coil are coated on all sides - with the exception of the electrical connections - with plastic, and that the plastic contains powdery magnetic material in high concentration.
  • a coil sheathing made of thermosetting or thermoplastic material and enriched in high concentration with ferrite powder or carbonyl iron replaces the previously required ferrite cores, particularly in the case of high-frequency coils.
  • the coil covered in this way is largely immersion-resistant and can be soldered onto a printed circuit board by means of wave soldering. This is of great advantage especially for surface-mountable electrical coils.
  • this coil is also characterized by considerable electrical and mechanical advantages. For example, components encased in this way can be positioned much easier and more precisely on PCBs with automatic assembly machines.
  • the known coil according to FIG. 1 has a coil former 1 with an annular and rectangular flange 2 or 3.
  • the flange 3 carries electrical connections 4 which are led out to the side and whose free ends can be soldered onto conductor tracks of a circuit board (not shown in the drawing).
  • a hatched ferrite core 7 is inserted into the hollow cylindrical interior of the coil body.
  • the wound coil is finally on all sides with a dashed envelope 5 made of plastic, e.g. overmoulded from thermosetting or thermoplastic material.
  • the ferrite core 7 according to FIG. 1 is omitted in the case of the electrical coil according to FIG. 2.
  • a sheathing 6 made of plastic which contains powdery, magnetic materials, e.g. Contains ferrite or carbonyl iron in high concentration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Magnetic Treatment Devices (AREA)
  • Closures For Containers (AREA)
  • Insulated Conductors (AREA)
EP90107283A 1989-04-19 1990-04-17 Bobine électrique montable en surface Expired - Lifetime EP0393599B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90107283T ATE91038T1 (de) 1989-04-19 1990-04-17 Oberflaechenmontierbare elektrische spule.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3912890 1989-04-19
DE3912890 1989-04-19

Publications (3)

Publication Number Publication Date
EP0393599A2 true EP0393599A2 (fr) 1990-10-24
EP0393599A3 EP0393599A3 (fr) 1991-01-09
EP0393599B1 EP0393599B1 (fr) 1993-06-23

Family

ID=6379004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107283A Expired - Lifetime EP0393599B1 (fr) 1989-04-19 1990-04-17 Bobine électrique montable en surface

Country Status (4)

Country Link
EP (1) EP0393599B1 (fr)
AT (1) ATE91038T1 (fr)
DE (1) DE59001832D1 (fr)
ES (1) ES2044294T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933425A1 (de) * 1989-10-06 1991-04-11 Staiger Mohilo & Co Gmbh Verfahren zum herstellen von hohlzylindrischen spulentraegern aus einem eisen-giesharz-gemisch
US6696638B2 (en) 1998-07-10 2004-02-24 Epcos Ag Application and production of a magnetic product
DE102015211734A1 (de) * 2015-06-24 2016-12-29 SUMIDA Components & Modules GmbH SMD-Bauelement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108769A (en) * 1981-09-04 1983-05-18 Toko Inc Arrangement of terminals on a chip type inductor
DE3510638C1 (de) * 1985-03-23 1986-10-16 Neosid Pemetzrieder Gmbh & Co Kg, 5884 Halver Induktives Miniatur-Bauelement, insbesondere Miniatur-Spule sowie Verfahren zur Herstellung eines solchen Bauelements
US4890085A (en) * 1987-10-21 1989-12-26 Tdk Electronic Co., Ltd. Terminal fitted bobbin
DE3820976A1 (de) * 1988-06-22 1989-12-28 Vogt Electronic Ag Smd-drossel bzw. -uebertrager

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108769A (en) * 1981-09-04 1983-05-18 Toko Inc Arrangement of terminals on a chip type inductor
DE3510638C1 (de) * 1985-03-23 1986-10-16 Neosid Pemetzrieder Gmbh & Co Kg, 5884 Halver Induktives Miniatur-Bauelement, insbesondere Miniatur-Spule sowie Verfahren zur Herstellung eines solchen Bauelements
US4890085A (en) * 1987-10-21 1989-12-26 Tdk Electronic Co., Ltd. Terminal fitted bobbin
DE3820976A1 (de) * 1988-06-22 1989-12-28 Vogt Electronic Ag Smd-drossel bzw. -uebertrager

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933425A1 (de) * 1989-10-06 1991-04-11 Staiger Mohilo & Co Gmbh Verfahren zum herstellen von hohlzylindrischen spulentraegern aus einem eisen-giesharz-gemisch
US6696638B2 (en) 1998-07-10 2004-02-24 Epcos Ag Application and production of a magnetic product
US7011764B2 (en) 1998-07-10 2006-03-14 Epcos Ag Method for producing a magnetic device
DE102015211734A1 (de) * 2015-06-24 2016-12-29 SUMIDA Components & Modules GmbH SMD-Bauelement

Also Published As

Publication number Publication date
DE59001832D1 (de) 1993-07-29
EP0393599B1 (fr) 1993-06-23
ES2044294T3 (es) 1994-01-01
EP0393599A3 (fr) 1991-01-09
ATE91038T1 (de) 1993-07-15

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