EP1647999A1 - Zusammenbau für Induktoren und Verfahren zur Herstellung - Google Patents

Zusammenbau für Induktoren und Verfahren zur Herstellung Download PDF

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Publication number
EP1647999A1
EP1647999A1 EP04425772A EP04425772A EP1647999A1 EP 1647999 A1 EP1647999 A1 EP 1647999A1 EP 04425772 A EP04425772 A EP 04425772A EP 04425772 A EP04425772 A EP 04425772A EP 1647999 A1 EP1647999 A1 EP 1647999A1
Authority
EP
European Patent Office
Prior art keywords
wire
assembly
winding
electrically insulating
pin
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
EP04425772A
Other languages
English (en)
French (fr)
Other versions
EP1647999B1 (de
Inventor
Lorenzo Baldo
Moreno Marton
Roberto Perin
Franco Zanatta
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.)
Osram GmbH
Osram SpA
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Osram SpA
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH, Osram SpA filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to EP04425772A priority Critical patent/EP1647999B1/de
Priority to AT04425772T priority patent/ATE389942T1/de
Priority to DE602004012566T priority patent/DE602004012566T2/de
Priority to CN2005101135789A priority patent/CN1760999B/zh
Publication of EP1647999A1 publication Critical patent/EP1647999A1/de
Application granted granted Critical
Publication of EP1647999B1 publication Critical patent/EP1647999B1/de
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
    • 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
    • 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
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H01F2005/043—Arrangements of electric connections to coils, e.g. leads having multiple pin terminals, e.g. arranged in two parallel lines at both sides of 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path

Definitions

  • the present invention relates to mounting assemblies for inductors.
  • Inductors are frequently used as components in a wide variety of electronic/electrical circuits. Exemplary applications of inductors are e.g. so-called “chokes” currently used for interference suppression e.g. in motors of house appliances in order to prevent RF interference on radio, TV equipment and the like or in electronic ballasts of fluorescent lamps.
  • Typical inductor mounting assemblies are typically comprised of an inductor body (sheath or bobbin) of an electrically insulating material and a conductive wire winding around the bobbin.
  • a core such as a ferrite core may be inserted in the bobbin to increase the inductance value of the inductor.
  • PCB printed circuit board
  • the ends of the inductor winding are connected (soldered) to metal pins.
  • a current arrangement provides for the inductor body or bobbin being produced of a plastics material via a moulding process such as injection moulding. After moulding, the metal pins are inserted into the body after moulding at the desired locations, and the ends of the inductor winding are soldered to the metal pins to provide the necessary electrical connection. The pins protrude from the inductor body to permit insertion into receiving holes provided in the PCB onto which the inductor is mounted.
  • the inductor winding is usually comprised of an electrically conductive (e.g. copper) wire covered by an insulating coating such as e.g. an enamel.
  • an insulating coating such as e.g. an enamel.
  • the enamel In order to provide good electrical connection to the pins, the enamel must be locally removed (e.g. broken), which typically occurs via the application of heat.
  • potting boxes are known for possible use with PCBs, specifically for use as components adapted for SMD mounting onto a PCB. These are plastic boxes having no metal terminals. When resorting to that arrangement, wires are connected to integrated plastic feet. Depending on the wire thickness, the binding-on points of the wires are fixed in v-shaped slots of the plastic feet for wrapping and provide the eventual connection to the PCB. These soldering points should be brushed blank before positioning onto the PCB. These boxes for PCBs are indicated as suitable for filter chokes or ISDN components.
  • the object of the present invention is to provide a choke that satisfies those still outstanding needs.
  • reference 1 indicates as a whole an inductor.
  • the inductor in question may be e.g. a so-called choke for use in interference suppression in motors of house appliances in order to prevent RF interference on radio, TV equipment and the like.
  • An alternative exemplary field of use may be electronic ballasts of fluorescent lamps.
  • the inductor considered herein may be any type of inductor for use in an electrical/electronic circuit and adapted to be mounted on a printed circuit board (PCB) together with other circuit components (not shown).
  • PCB printed circuit board
  • the inductor mounting assembly 1 considered herein includes an inductor body (sheath or bobbin) 2 of an electrically insulating material.
  • an insulating material is a plastics material (such as e.g. polybutyleneterephtalate PBTP, or others as polyamide PA, polycarbonate PC, polyethyleneterephtalate PETP, liquid crystal polymer LCP, polyphenylsulfid PPS).
  • plastics materials such as PBT have generally low softening temperatures in the range of 220 - 240 °C.
  • the body 2 generally exhibits a tubular shape with an axial orifice 2a possibly adapted to receive a core such as a ferrite core (not shown) inserted in the body to increase the inductance value of the inductor.
  • the tubular body 2 is provided at its opposite ends 20a and 20b with flange formations whose purpose will be better explained in the following.
  • Integrally formed with the body 2 (and thus comprised of the same electrically insulating material e.g. PBT of the body 2) are one or more pins 200.
  • the pins 20 protrude from at least one of the end faces (here, the end face 20b) of the moulded inductor body (or bobbin).
  • the pins 200 are thus adapted to be inserted into corresponding receiving holes provided in a PCB (not shown) onto which the inductor 1 is mounted.
  • Reference 3 denotes as a whole a winding of electrically conductive (e.g. copper) wire wound around the inductor body 2 in the region between the flange formations provided at the ends 20a and 20b.
  • electrically conductive e.g. copper
  • Such flange formations thus constitute lateral (i.e. axial) containment formations for the wire winding 3.
  • the electrically conductive wire of the winding 3 is usually covered by an insulating coating e.g. an enamel.
  • an insulating coating e.g. an enamel.
  • the coating In order to expose the winding wire at its ends, the coating must be locally removed (e.g. broken), which typically occurs via the application of heat.
  • a typical enamel used for that purpose is a polyurethane enamel which, in order to be broken, must be brought to a temperature of at least 300 °C. It will be appreciated that such a temperature is in excess of the softening temperature (220 - 240°C) of the plastics material comprising the body 2, including the pins 200 integrally formed therewith.
  • the wire winding 3 around the body 2 has at least one end 30 (and preferably both ends) wound around a respective one of the integrally moulded pins 200 protruding from the end face 20b of the body 2.
  • soldering material 4 secures the end 30 of the winding 3 around the respective pin 200 integrally moulded with the body.
  • the soldering material typically a Sn-Pb soldering mass having a melting temperature of about 180°C or the new lead free alloys which melting temperature may vary depending on the elements included but generally below 250°C) provides electrical contact to the end 30 of the wire.
  • This arrangement gives rise to a pin structure including a "core” integrally formed of the same insulating (plastics) material of the body 2.
  • This structure also includes outer, electrically conductive "cladding” comprised of the end 30 of the wire 3 wound around the pin 200 and the mass of soldering material 4 that secures the end 30 around the pin 200.
  • the manufacturing process schematically represented by the flow chart of Figure 3 includes as a first step 100 the moulding of the body 2 - and the pin(s) 200 integrally formed therewith. This typically occurs via conventional technologies such as injection moulding, so that the said body 2 and each pin 200 integrally moulded therewith comprise a (single) injection-moulded piece.
  • a step 102 the wire 3 is wound around the body 2.
  • automated winding techniques that are conventional in the art of inductor manufacture.
  • Such automated techniques usually provide for the body 2 to be rotated around a main axis, while the wire is metered out of dispensing head that moves relatively axially of the body 2.
  • Such a winding technique can be easily extended in a step 103, to winding the wire end(s) 30 around the respective pin or pins 200 as shown in Figure 2.
  • the wire end 30 wound around the pin 200 is subject to heating (typically in excess of 300°C, such as e.g. heating at 400°C for 1/10 of a second) in order to "break" the insulating enamel and thus locally remove the insulating coating to expose the conductive core of the wire end.
  • heating typically in excess of 300°C, such as e.g. heating at 400°C for 1/10 of a second
  • step 105 the soldering mass 4 is applied around the pin 200 and the wire end 30 wound thereon to complete the arrangement shown in Figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP04425772A 2004-10-13 2004-10-13 Zusammenbau für Induktoren und Verfahren zur Herstellung Expired - Lifetime EP1647999B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04425772A EP1647999B1 (de) 2004-10-13 2004-10-13 Zusammenbau für Induktoren und Verfahren zur Herstellung
AT04425772T ATE389942T1 (de) 2004-10-13 2004-10-13 Zusammenbau für induktoren und verfahren zur herstellung
DE602004012566T DE602004012566T2 (de) 2004-10-13 2004-10-13 Zusammenbau für Induktoren und Verfahren zur Herstellung
CN2005101135789A CN1760999B (zh) 2004-10-13 2005-10-13 感应器安装组件及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425772A EP1647999B1 (de) 2004-10-13 2004-10-13 Zusammenbau für Induktoren und Verfahren zur Herstellung

Publications (2)

Publication Number Publication Date
EP1647999A1 true EP1647999A1 (de) 2006-04-19
EP1647999B1 EP1647999B1 (de) 2008-03-19

Family

ID=34932824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425772A Expired - Lifetime EP1647999B1 (de) 2004-10-13 2004-10-13 Zusammenbau für Induktoren und Verfahren zur Herstellung

Country Status (4)

Country Link
EP (1) EP1647999B1 (de)
CN (1) CN1760999B (de)
AT (1) ATE389942T1 (de)
DE (1) DE602004012566T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120039040A1 (en) * 2010-08-10 2012-02-16 Hon Hai Precision Industry Co., Ltd. Electronic device and inductor thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090776A1 (de) * 2013-12-20 2015-06-25 Endress+Hauser Flowtec Ag Spule
CN110628991B (zh) * 2019-09-18 2021-06-11 中国第一汽车股份有限公司 一种用于商用车半轴感应器柔性制作与组焊的辅助装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4774756A (en) * 1985-10-11 1988-10-04 U.S. Philips Corporation Method of manufacturing a transformer with coaxial coils
US5696477A (en) * 1994-05-30 1997-12-09 Tabuchi Electric Co., Ltd. Transformer
WO2003069640A1 (de) * 2002-02-12 2003-08-21 Siemens Ag Österreich Spulenkörper und spule für leiterplattenmontage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2396490Y (zh) * 1999-11-13 2000-09-13 天正集团有限公司 控制或照明用小型干式变压器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4774756A (en) * 1985-10-11 1988-10-04 U.S. Philips Corporation Method of manufacturing a transformer with coaxial coils
US5696477A (en) * 1994-05-30 1997-12-09 Tabuchi Electric Co., Ltd. Transformer
WO2003069640A1 (de) * 2002-02-12 2003-08-21 Siemens Ag Österreich Spulenkörper und spule für leiterplattenmontage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120039040A1 (en) * 2010-08-10 2012-02-16 Hon Hai Precision Industry Co., Ltd. Electronic device and inductor thereof

Also Published As

Publication number Publication date
CN1760999B (zh) 2011-01-12
EP1647999B1 (de) 2008-03-19
ATE389942T1 (de) 2008-04-15
DE602004012566T2 (de) 2009-04-16
DE602004012566D1 (de) 2008-04-30
CN1760999A (zh) 2006-04-19

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