EP0608127A1 - Système d'isolation pour enroulements magnétiques avec des conducteurs plats empilés - Google Patents

Système d'isolation pour enroulements magnétiques avec des conducteurs plats empilés Download PDF

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Publication number
EP0608127A1
EP0608127A1 EP94300412A EP94300412A EP0608127A1 EP 0608127 A1 EP0608127 A1 EP 0608127A1 EP 94300412 A EP94300412 A EP 94300412A EP 94300412 A EP94300412 A EP 94300412A EP 0608127 A1 EP0608127 A1 EP 0608127A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
annular
windings
substrate
insulation system
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Withdrawn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
EP94300412A
Other languages
German (de)
English (en)
Inventor
Jon Elliott Cronk
Matthew Anthony Wilkowski
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Publication of EP0608127A1 publication Critical patent/EP0608127A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F2017/006—Printed inductances flexible printed inductors
    • 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
    • H01F27/2804—Printed windings
    • H01F2027/2819—Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit

Definitions

  • This invention relates to magnetic components having windings of planar sheet conductors or having planar conductive paths etched printed or deposited on a planar substrate, and in particular to an insulation system for these windings of the magnetic component.
  • the performance of electrical systems and components is largely dependent on the performance of the electrical insulation of those components and systems. This is particularly true in instances of magnetic components utilizing electrical windings. Factors such as creepage and clearance distances may enhance safety while detracting from the electrical performance of the component. It is therefore desirable to find forms of insulation that provide needed safety performance while also providing optimal electrical performance.
  • a magnetic component having an insulation system embodying the principles of the invention, includes windings formed as defined in claim 1.
  • FIGS. 1-3 and 6 are substantially the same as the drawings disclosing a magnetic component structure in the U.S. patent 5,179,365.
  • a winding assembly for a magnetic component as assembled on a bobbin structure is shown in the FIG. 1.
  • a plurality of copper sheet conductors 101 are shown arranged to fit on a supporting bobbin structure 110.
  • the individual copper sheet windings 101 are interconnected with each other by conducting pins 115 included in the bobbin structure.
  • Each copper sheet conductor 101 comprises one turn of a winding and by means of the pins 115 are interconnected with other copper sheet conductors to form a complete winding supported by the bobbin structure 110.
  • the individual copper sheet conductors 101 are stamped from sheet copper in the form of an annular ring.
  • the sheet conductor includes end terminals 111 and 112 in which holes are included to fit over the conducting pins 115 so that the various conductors may be electrically interconnected to each other to form the windings.
  • FIG. 6 An alternative structure for the individual conductive turns of the winding is shown in the FIG. 6.
  • a copper conductor 607 is either etched, printed or deposited on both sides of a flexible substrate 602.
  • the conductor on each side is extended to a terminal end 615 to permit contact with the pin holes 603 and 604 which are connected to pins 115 of the bobbin structure of FIG. 1 to interconnect the turns into a winding.
  • the top and bottom conductors affixed to the sbustrate are connected in series with each other by vias 621 and 622
  • a magnetic component 201 adapted for use with the flex or sheet conductors is shown in both a plan and an elevation view in FIGS. 2 and 3, as being mounted on a circuit substrate 305.
  • This component includes the bobbin 110 and the windings as shown in the FIG. 1.
  • the bobbin 110 includes support members 111 resting on the substrate 305 which supports the component.
  • the magnetic core 220 is made of a ferrite material and comprises a base structure 218 and a cover structure 219.
  • the core windows 231 and 232 through which the windings pass define a annular or circular path which conform to circular segments of the annular conductors.
  • the windows and conductors are dimensioned so that the stacked winding efficiently fills the window space.
  • the insulation system is constructed of a first and second polymeric insulating film members 401,402 composed of a polymeric material such as a polyimide film which is deposited on opposing sides of a flexible substrate 405 supporting the conductor paths 406 and 407 etched, printed or deposited on both sides of the flexible substrate 405 such as is disclosed in the schematic of FIG. 6.
  • the polyimide insulating films 401 and 402 have a shape conforming to the edges of the substrate and a peripheral extent substantially equaling the peripheral extent of the substrate 405 supporting the conductive material. This insulating film when joined adhesively to forms an insulating coverlay.
  • An adhesive such as an acrylic adhesive, is applied between the substrate and the polymeric film. Heat and pressure is applied to the assembly by two hot flexible plates that compress the polymeric films against the substrate.
  • the film members under pressure conform to the affixed conductor paths and to the inner and outer edges of the substrate material. These polymerfilm members are positioned so as to cover the annular portion of the flexible substrate and its conductive material forming the current paths.
  • a terminal end 425 extends beyond the insulated portion to facilitate interconnection to the bobbin pins and hence to other conductors.
  • coverlay portions of the polymeric insulating film of each flexible substrate are bonded to the base substrate 405 by the acrylic adhesive to seal the current paths which pass through the annular windows defined by the magnetic core shown in the FIGS. 2 and 3.
  • the substrate and its associated conductor is also insulated from adjacent flexible substrates and their included current paths.
  • the insulation system as applied to a rigid sheet conductor is shown in the FIGS. 7 and 8.
  • a first and second polymeric organic insulating film 712 and 713 such as a polyimide is deposited on opposing sides of the rigid self supporting conductor 721. It is dimensioned to have a peripheral extent exceeding the peripheral extent of the sheet conductor and overlay the conductors.
  • Adhesive under heat and pressure is applied to the assembly to secure the polymer films to both sides of the sheet conductor and to each other in the overlay region.
  • the film members coverlay the sheet conductor and both the inner and outer peripheral edges of the sheet conductors. The coverlay covers the sheet conductor so that the conductor passing through the annular windows of the magnetics component core is completely insulated from the core and from adjacent sheet conductors.
  • each rigid self supporting conductor is bonded with an acrylic adhesive under heat and pressure to the conductor and to the opposite insulating film.
  • This forms the insulative coverlay and seals the current paths passing through the annular windows of the magnetic core and from adjacent rigid self supporting sheet conductors containing current paths.
  • Two terminal ends 726 and 727 extend beyond the insulation coverlay to facilitate connection to the bobbin pins and to other conductors.
  • the dimension of the polyimide insulating films 401 and 402 in the illustrative embodiment of FIGS. 4 and 5 have a shape and dimension conforming to the edges of the substrate and a peripheral extent substantially equaling the peripheral extent of the substrate 405 supporting the conductive material, it is to be understood that the insulating coverlay may have a peripheral extent exceeding the extent of the substrate 405. This and many other variations may suggest themselves to those skilled in the art within the scope of the invention disclosed herein.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
EP94300412A 1993-01-22 1994-01-19 Système d'isolation pour enroulements magnétiques avec des conducteurs plats empilés Withdrawn EP0608127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US720193A 1993-01-22 1993-01-22
US7201 1993-01-22

Publications (1)

Publication Number Publication Date
EP0608127A1 true EP0608127A1 (fr) 1994-07-27

Family

ID=21724792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94300412A Withdrawn EP0608127A1 (fr) 1993-01-22 1994-01-19 Système d'isolation pour enroulements magnétiques avec des conducteurs plats empilés

Country Status (2)

Country Link
EP (1) EP0608127A1 (fr)
JP (1) JPH06244029A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715322A1 (fr) 1994-12-02 1996-06-05 The Mtl Instruments Group Plc Transformateurs
EP0741395A1 (fr) * 1995-05-04 1996-11-06 AT&T IPM Corp. Dispositif magnétique planaire montable sur les terminaux et sa méthode de fabrication
EP0741396A1 (fr) * 1995-05-04 1996-11-06 AT&T IPM Corp. Dispositif à puissance magnétique utilisant une connexion sans fils à une carte de circuit imprimé et sa méthode de fabrication
EP0919062A1 (fr) * 1996-08-05 1999-06-02 International Power Devices, Inc. Transformateur planaire
GB2369251A (en) * 2000-05-22 2002-05-22 Payton Ltd Method of insulating a planar coil circuit
EP1293995A2 (fr) * 2001-09-14 2003-03-19 STS, Spezial-Transformatoren-Stockach GmbH & Co. Composant inductif électronique de type plat, en particulier transformateur planaire ou inducteur planaire
US6774757B2 (en) 2002-05-27 2004-08-10 Sansha Electric Manufacturing Company, Limited Coil
GB2408389A (en) * 2003-11-24 2005-05-25 Sansha Electric Mfg Co Ltd Insulation arrangement for a planar section of a coil
DE19945013C5 (de) * 1999-09-20 2005-10-13 Epcos Ag Planartransformator

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT314646B (de) * 1972-05-29 1974-03-15 Siemens Ag Supraleitfaehige schaltstrecke fuer starkstrom
US3868766A (en) * 1973-08-31 1975-03-04 Ford Motor Co Method of forming an insulated coil for a dynamoelectric machine
FR2262857A1 (en) * 1974-03-01 1975-09-26 Siemens Ag Shell core transformer with central core piece - has specified core piece configuration corresponding to shell slots
JPS6088411A (ja) * 1983-10-21 1985-05-18 Fuji Jikou Kk 電磁コイルおよびその製造法
JPS62132307A (ja) * 1985-12-05 1987-06-15 Toshiba Corp 箔巻変圧器
EP0310396A1 (fr) * 1987-09-29 1989-04-05 Kabushiki Kaisha Toshiba Inducteur planaire
WO1991015861A1 (fr) * 1990-03-30 1991-10-17 Multisource Technology Corporation Transformateur plan de profil bas utilise dans des alimentations electriques a decoupage autonomes
EP0522475A1 (fr) * 1991-07-10 1993-01-13 ABBPATENT GmbH Elément inductif et son procédé de fabrication

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5161825A (en) * 1974-11-26 1976-05-28 Nippon Kogaku Kk Kenbikyo niokeru shashinsatsueisochi
US5179365A (en) * 1989-12-29 1993-01-12 At&T Bell Laboratories Multiple turn low profile magnetic component using sheet windings

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT314646B (de) * 1972-05-29 1974-03-15 Siemens Ag Supraleitfaehige schaltstrecke fuer starkstrom
US3868766A (en) * 1973-08-31 1975-03-04 Ford Motor Co Method of forming an insulated coil for a dynamoelectric machine
FR2262857A1 (en) * 1974-03-01 1975-09-26 Siemens Ag Shell core transformer with central core piece - has specified core piece configuration corresponding to shell slots
JPS6088411A (ja) * 1983-10-21 1985-05-18 Fuji Jikou Kk 電磁コイルおよびその製造法
JPS62132307A (ja) * 1985-12-05 1987-06-15 Toshiba Corp 箔巻変圧器
EP0310396A1 (fr) * 1987-09-29 1989-04-05 Kabushiki Kaisha Toshiba Inducteur planaire
WO1991015861A1 (fr) * 1990-03-30 1991-10-17 Multisource Technology Corporation Transformateur plan de profil bas utilise dans des alimentations electriques a decoupage autonomes
EP0522475A1 (fr) * 1991-07-10 1993-01-13 ABBPATENT GmbH Elément inductif et son procédé de fabrication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 355 (E - 558)<2802> 19 November 1987 (1987-11-19) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 234 (E - 344)<1957> 20 September 1985 (1985-09-20) *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715322A1 (fr) 1994-12-02 1996-06-05 The Mtl Instruments Group Plc Transformateurs
US6239683B1 (en) 1995-05-04 2001-05-29 Tyco Electronics Logistics A.G. Post-mountable planar magnetic device and method of manufacture thereof
EP0741395A1 (fr) * 1995-05-04 1996-11-06 AT&T IPM Corp. Dispositif magnétique planaire montable sur les terminaux et sa méthode de fabrication
EP0741396A1 (fr) * 1995-05-04 1996-11-06 AT&T IPM Corp. Dispositif à puissance magnétique utilisant une connexion sans fils à une carte de circuit imprimé et sa méthode de fabrication
US5724016A (en) * 1995-05-04 1998-03-03 Lucent Technologies Inc. Power magnetic device employing a compression-mounted lead to a printed circuit board
US6262649B1 (en) 1995-05-04 2001-07-17 Tyco Electronics Logistics Ag Power magnetic device employing a leadless connection to a printed circuit board and method of manufacture thereof
US6128817A (en) * 1995-05-04 2000-10-10 Lucent Technologies Inc. Method of manufacturing a power magnetic device mounted on a printed circuit board
EP0919062A1 (fr) * 1996-08-05 1999-06-02 International Power Devices, Inc. Transformateur planaire
EP0919062A4 (fr) * 1996-08-05 2000-03-15 Int Power Devices Inc Transformateur planaire
DE19945013C5 (de) * 1999-09-20 2005-10-13 Epcos Ag Planartransformator
GB2369251A (en) * 2000-05-22 2002-05-22 Payton Ltd Method of insulating a planar coil circuit
GB2369251B (en) * 2000-05-22 2004-03-24 Payton Ltd Planar coil circuit
US6882260B2 (en) 2000-05-22 2005-04-19 Payton Ltd. Method and apparatus for insulating a planar transformer printed circuit and lead frame windings forms
EP1293995A2 (fr) * 2001-09-14 2003-03-19 STS, Spezial-Transformatoren-Stockach GmbH & Co. Composant inductif électronique de type plat, en particulier transformateur planaire ou inducteur planaire
EP1293995A3 (fr) * 2001-09-14 2003-04-16 STS, Spezial-Transformatoren-Stockach GmbH & Co. Composant inductif électronique de type plat, en particulier transformateur planaire ou inducteur planaire
US6774757B2 (en) 2002-05-27 2004-08-10 Sansha Electric Manufacturing Company, Limited Coil
GB2408389A (en) * 2003-11-24 2005-05-25 Sansha Electric Mfg Co Ltd Insulation arrangement for a planar section of a coil
GB2408389B (en) * 2003-11-24 2006-11-15 Sansha Electric Mfg Co Ltd Coil

Also Published As

Publication number Publication date
JPH06244029A (ja) 1994-09-02

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