EP0642142A2 - Drosselspule - Google Patents

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Publication number
EP0642142A2
EP0642142A2 EP94202487A EP94202487A EP0642142A2 EP 0642142 A2 EP0642142 A2 EP 0642142A2 EP 94202487 A EP94202487 A EP 94202487A EP 94202487 A EP94202487 A EP 94202487A EP 0642142 A2 EP0642142 A2 EP 0642142A2
Authority
EP
European Patent Office
Prior art keywords
self
inductance coil
ferrite
coil according
millimeters
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
EP94202487A
Other languages
English (en)
French (fr)
Other versions
EP0642142B1 (de
EP0642142A3 (de
Inventor
Pascal Société Civile S.P.I.D Rouet
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.)
Koninklijke Philips NV
Original Assignee
Philips Electronique Gran Public
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Philips Electronique Gran Public, Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Philips Electronique Gran Public
Publication of EP0642142A2 publication Critical patent/EP0642142A2/de
Publication of EP0642142A3 publication Critical patent/EP0642142A3/de
Application granted granted Critical
Publication of EP0642142B1 publication Critical patent/EP0642142B1/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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • 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

Definitions

  • the present invention relates to a self-inductance coil comprising a winding wound on a rectilinear magnetic core having at least one air gap. It also relates to a method for the manufacture of such a self-inductance coil.
  • a self-inductance coil is used to inject a low frequency current, for example of the order of ten amperes with a frequency of 50 Hz or 60 Hz, into a cable of a distribution network of television, to power various devices.
  • a coil comprising a winding wound on a rectilinear magnetic core having air gaps is known from French patent N ° 951,963.
  • This patent describes a coil intended for a low frequency application (discharge lamps), for which it is desired to be able to adjust the saturation threshold, and which for this purpose has one or more recesses inside a rectilinear core.
  • the document does not discuss the behavior of the coil with respect to blocking of high frequency currents.
  • a coil for the above-mentioned application must have sufficient impedance to block high-frequency television signals, and to pass low-frequency alternating current. It must also have few spurious resonances so as not to disturb the bandwidth of the distribution network between 5 MHz and more than 1 GHz.
  • the high frequency signals are modulated parasitically at the frequency of the supply current (humming modulation), because of non-linearities due to phenomena of hysteresis and saturation in the material. of the coil core.
  • the object of the invention is to considerably attenuate the humming modulation by maintaining a sufficient impedance for the high frequency signals, and without excessively increasing the volume of the coil.
  • the invention takes advantage of the saturation characteristics of open nuclei as a function of their geometry and of the dispersion property. magnetic fields in an open core as a function of frequency.
  • a coil according to the invention is remarkable in that said magnetic core consists of a plurality of ferrite cylinders placed in the extension of one another with a space between each of them.
  • saturation depends mainly on the geometric shape of the nucleus and in particular on its length.
  • the shorter an open core the less it saturates.
  • By associating several open cores separated by spaces the whole saturates less and the inductance decreases at low frequencies but that does not matter.
  • the ferrite cylinders are trapped in a cylinder made of molded plastic.
  • the molded plastic cylinder has on its cylindrical outer surface a helical groove. This groove guides the wire during winding and keeps it in place afterwards. In addition, not only saturation but also possible vibrations generate parasitic modulation.
  • a subsidiary advantage of both the overmolding of the cores and the presence of the groove is therefore that the parasitic modulation due to this cause is also greatly reduced, since the wire as well as the cores are mechanically well immobilized.
  • the core is preferably made of three cylinders of ferrite in ferroxcube 4B1 material whose diameter is between 7 and 13 millimeters, each having a length between 8 and 16 millimeters and separated by spaces each between 1 and 3 millimeters, and the winding comprises a number of turns between 20 and 40, wound with a wire whose diameter is between 8 and 16 tenths of a millimeter.
  • a method for manufacturing a self-inductance coil according to the invention is remarkable in that the molding is a hot injection molding of thermoplastic material and the ferrite cores are held in position during injection by means of spikes.
  • the pins leave well-shaped imprints in the plastic, but this has no drawbacks.
  • the magnetic core according to the invention shown in Figure 2, consists of three ferrite cylinders 4, 5, 6 placed end to end with a space between each of them. These ferrite cylinders are overmolded in a cylinder 3 made of plastic. This molded plastic cylinder 3 comprises on its cylindrical outer surface a helical groove 7.
  • the core is made of three ferrite cylinders made of ferroxcube 4B1 material whose diameter is 10 millimeters, each having a length of 12 millimeters and separated by spaces of 2 millimeters each.
  • the winding includes 24 turns wound with a 10/10 th of a millimeter wire
  • thermoplastic material for the manufacture of a self-inductance coil according to the invention, a hot injection molding of thermoplastic material was used and the ferrite cores were kept in position during the injection by means of pins.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP94202487A 1993-09-01 1994-08-31 Drosselspule Expired - Lifetime EP0642142B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9310427 1993-09-01
FR9310427 1993-09-01

Publications (3)

Publication Number Publication Date
EP0642142A2 true EP0642142A2 (de) 1995-03-08
EP0642142A3 EP0642142A3 (de) 1995-05-10
EP0642142B1 EP0642142B1 (de) 2002-01-30

Family

ID=9450486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94202487A Expired - Lifetime EP0642142B1 (de) 1993-09-01 1994-08-31 Drosselspule

Country Status (5)

Country Link
US (1) US5767759A (de)
EP (1) EP0642142B1 (de)
JP (1) JPH07122432A (de)
DE (1) DE69429752T2 (de)
TW (1) TW252206B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732708A2 (de) * 1995-03-15 1996-09-18 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Magnetischer und/oder magnetissierbarer Wickelträger
FR2775824A1 (fr) * 1998-03-03 1999-09-03 Philips Electronics Nv Composant a self inductance
EP1168383A1 (de) * 2000-06-29 2002-01-02 Memscap Mikrokomponent wie Mikroinduktanz oder Mikrotransformator

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3399366B2 (ja) 1998-06-05 2003-04-21 株式会社村田製作所 インダクタの製造方法
US6339364B1 (en) * 1998-11-18 2002-01-15 National Electronic Devices Ltd. RF choke with windings separated by a distance equal to the smaller core diameter
JP2002313630A (ja) * 2001-04-10 2002-10-25 Uro Electronics Co Ltd チョークコイル
US6510970B2 (en) * 2001-05-31 2003-01-28 Ultradent Products, Inc. Coupling adaptor for use with an air/water syringe tip of a fluid dispensing device
DE10129163C2 (de) * 2001-06-16 2003-08-28 Bohnert Gmbh Spule mit Kern und Verfahren zu deren Herstellung
US6741153B1 (en) * 2002-12-30 2004-05-25 Industrial Technology Research Institute Flat high-voltage impulse transformer
WO2005021539A1 (en) * 2003-09-03 2005-03-10 Pfizer Japan, Inc. Benzimidazolone compounds having 5-ht4 receptor agonistic activity
US20090251257A1 (en) * 2008-04-03 2009-10-08 Gerald Stelzer Wiring Assembly And Method of Forming A Channel In A Wiring Assembly For Receiving Conductor and Providing Separate Regions of Conductor Contact With The Channel
WO2010035264A1 (en) * 2008-09-26 2010-04-01 Xtend Networks Ltd. Chockless power coupler
JP2010288244A (ja) * 2009-06-12 2010-12-24 Pixela Corp Ｌｎｂインターフェース回路
EP2678551A1 (de) 2011-02-22 2014-01-01 Federal-Mogul Ignition Company Koronazünder mit verbesserter energieeffizienz
KR101919052B1 (ko) * 2012-06-04 2018-11-16 삼성전자주식회사 좌표 표시 장치 및 좌표 표시 장치의 입력 좌표를 측정하는 좌표 측정 장치
JP7085497B2 (ja) * 2019-01-11 2022-06-16 京セラ株式会社 コア部品、その製造方法、およびインダクタ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH240899A (de) * 1942-09-05 1946-01-31 Philips Nv Hochfrequenzspule.
US2776413A (en) * 1951-05-04 1957-01-01 Quality Components Inc Core for choke coil or resistor
DE1259976B (de) * 1962-09-12 1968-02-01 Siemens Ag Hochfrequenzspule fuer Frequenzen groesser 1 MHz
JPS6012712A (ja) * 1983-07-01 1985-01-23 Nippon Ferrite Ltd 線輪およびその製造方法
JPH0513213A (ja) * 1991-06-28 1993-01-22 Murata Mfg Co Ltd 高周波用磁性材料の製造方法
DE4139440A1 (de) * 1991-11-29 1993-06-03 Siemens Ag Elektrisches bauelement und verfahren zu seiner herstellung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123787A (en) * 1964-03-03 Toroidal transformer having a high turns ratio
FR951963A (fr) * 1944-03-11 1949-11-07 Lampes Sa Perfectionnements aux bobines de self à noyau magnétique central rectiligne
US3173080A (en) * 1959-05-25 1965-03-09 Maeda Hisao Electric circuit having distributed constants
US3491300A (en) * 1967-03-16 1970-01-20 Motorola Inc Frequency modulation discriminator with means to select the recovery characteristic
US3662306A (en) * 1971-03-24 1972-05-09 Gen Instrument Corp Adjustably coupled radio frequency transformer
US4638282A (en) * 1985-07-18 1987-01-20 United Technologies Automotive, Inc. Wire cross-over arrangement for coil assembly
JPH0463613U (de) * 1990-10-09 1992-05-29
JP2514836Y2 (ja) * 1991-05-29 1996-10-23 松下電器産業株式会社 コイル部品

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH240899A (de) * 1942-09-05 1946-01-31 Philips Nv Hochfrequenzspule.
US2776413A (en) * 1951-05-04 1957-01-01 Quality Components Inc Core for choke coil or resistor
DE1259976B (de) * 1962-09-12 1968-02-01 Siemens Ag Hochfrequenzspule fuer Frequenzen groesser 1 MHz
JPS6012712A (ja) * 1983-07-01 1985-01-23 Nippon Ferrite Ltd 線輪およびその製造方法
JPH0513213A (ja) * 1991-06-28 1993-01-22 Murata Mfg Co Ltd 高周波用磁性材料の製造方法
DE4139440A1 (de) * 1991-11-29 1993-06-03 Siemens Ag Elektrisches bauelement und verfahren zu seiner herstellung

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ENCYCLOPOEDIA UNIVERSALIS, 1980, volume 6, pages 1039-1042, "FERRITES" *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 272 (E-1371) 26 Mai 1993 & JP-A-05 013 213 (MURATA MFG) 22 Janvier 1993 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 126 (E-318) (1849) 31 Mai 1985 & JP-A-60 012 712 (NIHON FERRITE) 23 Janvier 1985 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732708A2 (de) * 1995-03-15 1996-09-18 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Magnetischer und/oder magnetissierbarer Wickelträger
EP0732708A3 (de) * 1995-03-15 1996-09-25 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Magnetischer und/oder magnetissierbarer Wickelträger
FR2775824A1 (fr) * 1998-03-03 1999-09-03 Philips Electronics Nv Composant a self inductance
EP0940827A1 (de) * 1998-03-03 1999-09-08 Koninklijke Philips Electronics N.V. Selbstinduktives Bauelement
EP1168383A1 (de) * 2000-06-29 2002-01-02 Memscap Mikrokomponent wie Mikroinduktanz oder Mikrotransformator
FR2811135A1 (fr) * 2000-06-29 2002-01-04 Memscap Microcomposant du type micro-inductance ou microtransformateur
US6529110B2 (en) 2000-06-29 2003-03-04 Memscap, S.A. Microcomponent of the microinductor or microtransformer type

Also Published As

Publication number Publication date
TW252206B (de) 1995-07-21
DE69429752T2 (de) 2002-09-12
EP0642142B1 (de) 2002-01-30
EP0642142A3 (de) 1995-05-10
US5767759A (en) 1998-06-16
JPH07122432A (ja) 1995-05-12
DE69429752D1 (de) 2002-03-14

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