EP0351861A1 - Induktives Bauelement, insbesondere Übertrager - Google Patents

Induktives Bauelement, insbesondere Übertrager Download PDF

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Publication number
EP0351861A1
EP0351861A1 EP89113372A EP89113372A EP0351861A1 EP 0351861 A1 EP0351861 A1 EP 0351861A1 EP 89113372 A EP89113372 A EP 89113372A EP 89113372 A EP89113372 A EP 89113372A EP 0351861 A1 EP0351861 A1 EP 0351861A1
Authority
EP
European Patent Office
Prior art keywords
winding
connecting elements
core
component according
toroidal core
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Withdrawn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
EP89113372A
Other languages
German (de)
English (en)
French (fr)
Inventor
Horst Ing. Scheffler (Grad.)
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.)
Siemens 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
Publication of EP0351861A1 publication Critical patent/EP0351861A1/de
Withdrawn legal-status Critical Current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
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F17/062—Toroidal core with turns of coil around it
    • 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
    • H01F2005/046—Details of formers and pin terminals related to mounting on printed circuits

Definitions

  • the invention relates to an inductive component, in particular a choke coil or a transformer, for. B. pulse, power, broadband transformer u.
  • an inductive component in particular a choke coil or a transformer, for. B. pulse, power, broadband transformer u.
  • a toroidal core made of ferromagnetic material, depending on the application, at least one winding applied to the toroidal core and connecting elements for connecting the winding ends.
  • ring cores made of ferromagnetic material, usually. H. so-called ferrite ring cores are used.
  • the advantages mentioned with regard to their magnetic values were bought through a complex winding technique due to the toroidal core.
  • the winding ends were wound onto the preferably pin-shaped connection elements of the connection carriers and the winding of toroidal cores of smaller diameter was carried out by hand.
  • the winding devices for toroidal cores which have become known in recent times and which automatically fix the winding ends to the connection elements, now offer the possibility of automatic loading and winding of the toroidal cores or their connection elements.
  • a holder for the wound toroidal cores there is a one-piece toroidal core holder equipped with the connecting elements, which can be used both for conventional assembly, e.g. B. circuit boards, as well as for the so-called. Surface mounting of the components.
  • Transmitter z. B. intended for use at higher voltages, require electrical insulation between the toroid and the winding.
  • a known embodiment of such components therefore provides toroidal cores that can be painted or Vertebral sintering with a z. B. 0.4 mm thick plastic layer are insulated from the winding.
  • connection carriers The ring cores treated and wound in this way are usually applied to a separate connection carrier and their winding ends are soldered to the connection pins of this connection carrier.
  • the design of these connection carriers and the sequence of the individual manufacturing and assembly steps do not allow automatic loading and unwinding.
  • FIG. 1 in plan view or in FIG. 2 in a section along line 2, 2 according to FIG. 1, a ferrite toroidal core 1 is inserted into an annular holding pot 2 made of insulating material. In the area of its open end face, this holding pot is closed by means of a cover 3 made of insulating material. Eyes 4, 5, 8, 9 are injection-molded in one piece onto the opposite end face of the mounting pot, into which connection pins 6, 7, 12 and 13 are injected. The winding ends of the windings wound on the holder pot 2 are, as z. B. for the winding end 11 of the winding 10 shown in Figure 1, wound on the corresponding pins and soldered to them.
  • this embodiment can be wound automatically, it has the disadvantage that the completely tight pressing of the cover into the holder pot is generally not possible, so that inadmissibly short creepage distances occur between the windings and the toroidal core, which are only used by means of a greater wall thickness Plastic parts can be extended to a permissible level.
  • this wound version is immersed in the wave pool, there is also the risk that the lid will be pressed outwards by the increased pressure that occurs in the interior of the holder pot.
  • the present invention has for its object to provide an inductive component or a holder for this component, which avoids the aforementioned disadvantages, i. H. in particular the fully automatic production of these preferably surface-mountable components.
  • the invention provides in a component according to the preamble of claim 1 that the toroid is directly overmolded with high-temperature-resistant plastic and that in its adjacent areas to at least one of the end faces of the ring core, z. B. pins are injected.
  • the layer or wall thickness of the plastic covering can also be chosen to be so thin that, if the holding function is maintained, any VDE regulations can still be observed. By means of relatively thin wall thicknesses, a correspondingly enlarged changing space can finally be created.
  • extruded toroidal cores which are easier to manufacture and extruded can also be used instead of extruded toroidal cores.
  • partitions can be molded onto the plastic layer, through which z. B. for winding insulation or for layered winding in multi-layer windings, the holder can be divided into individual mutually insulated chambers without great effort.
  • the z. B. pin-shaped connections can be replaced by L-shaped, which are led out in the area of the end face of the ring core transversely to the longitudinal central axis of the ring core.
  • the surface-mountable component can be soldered onto the circuit board by means of IR soldering, vapor phase soldering or wave soldering, without causing damage to the plastic casing of the toroid fear. This provides an SMD component that is suitable for mixed assembly and also for double-sided SMD assembly.
  • 4 is a z. B. extruded ring core 20 with a high-temperature resistant plastic layer 21. Eyes 22, 24, 26, 28, into which connection pins 23, 25, 27, 29 are embedded, are injection molded onto the lower end face of the plastic layer 21, viewed in the plane of the drawing.
  • One-piece partitions 30 to 33 are preferably injection molded onto the plastic layer 21, through which the peripheral surface of the components is in each case in separate chambers for the individual windings - for. B. for the winding 40 - is divided.
  • the transformer designed in this way ensures perfect winding insulation and creates the prerequisites for a position-oriented and automated winding and winding of the winding ends 41 onto the connecting pins.
  • the SMD-compliant transformer version according to FIG. 5 shows a ferrite ring core 50 with an encapsulated plastic layer 51 and molded partitions 56, 57 and 58.
  • L-shaped connecting elements e.g. B. terminal lugs 52 to 54, injected, which lead out transversely to the longitudinal central axis of the ring core 50 and are curved in their free ends so that a SMD - suitable assembly of the components is possible. If one also observes a certain height of the partition walls 56 to 58 in the area of the connection elements 52 to 54, then a minimum distance from the surface of the circuit board required for the components and the windings is also ensured in the case of SMD assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
EP89113372A 1988-07-21 1989-07-20 Induktives Bauelement, insbesondere Übertrager Withdrawn EP0351861A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824833 1988-07-21
DE3824833 1988-07-21

Publications (1)

Publication Number Publication Date
EP0351861A1 true EP0351861A1 (de) 1990-01-24

Family

ID=6359260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113372A Withdrawn EP0351861A1 (de) 1988-07-21 1989-07-20 Induktives Bauelement, insbesondere Übertrager

Country Status (2)

Country Link
EP (1) EP0351861A1 (fi)
FI (1) FI893511A (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5233318A (en) * 1991-03-29 1993-08-03 Kokusai Electric Co., Ltd. Cm type directional coupler
DE19633983C1 (de) * 1996-08-22 1997-08-28 Vacuumschmelze Gmbh Verfahren zur Herstellung eines Bewicklungsschutzes für Bandkerne
US6849295B2 (en) 1996-08-22 2005-02-01 Vacuumschmelze Gmbh Method for producing a winding protection for tape-wound cores

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307262A1 (de) * 1983-03-02 1984-09-06 Vogt Gmbh & Co Kg, 8391 Erlau Ringkern-entstoerdrossel mit gerichtetem streufeld
AT376518B (de) * 1977-05-14 1984-11-26 Vogt Gmbh & Co Kg Funkentstoerdrossel fuer phasenanschnittgesteuerte halbleiterschalter
EP0175069A1 (de) * 1984-09-20 1986-03-26 Vacuumschmelze GmbH Verfahren zur Herstellung eines induktiven Bauelements mit einem bewickelten Ringbandkern

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT376518B (de) * 1977-05-14 1984-11-26 Vogt Gmbh & Co Kg Funkentstoerdrossel fuer phasenanschnittgesteuerte halbleiterschalter
DE3307262A1 (de) * 1983-03-02 1984-09-06 Vogt Gmbh & Co Kg, 8391 Erlau Ringkern-entstoerdrossel mit gerichtetem streufeld
EP0175069A1 (de) * 1984-09-20 1986-03-26 Vacuumschmelze GmbH Verfahren zur Herstellung eines induktiven Bauelements mit einem bewickelten Ringbandkern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5233318A (en) * 1991-03-29 1993-08-03 Kokusai Electric Co., Ltd. Cm type directional coupler
DE19633983C1 (de) * 1996-08-22 1997-08-28 Vacuumschmelze Gmbh Verfahren zur Herstellung eines Bewicklungsschutzes für Bandkerne
US6849295B2 (en) 1996-08-22 2005-02-01 Vacuumschmelze Gmbh Method for producing a winding protection for tape-wound cores

Also Published As

Publication number Publication date
FI893511A0 (fi) 1989-07-20
FI893511A (fi) 1990-01-22

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