EP0642142B1 - Drosselspule - Google Patents

Drosselspule Download PDF

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Publication number
EP0642142B1
EP0642142B1 EP94202487A EP94202487A EP0642142B1 EP 0642142 B1 EP0642142 B1 EP 0642142B1 EP 94202487 A EP94202487 A EP 94202487A EP 94202487 A EP94202487 A EP 94202487A EP 0642142 B1 EP0642142 B1 EP 0642142B1
Authority
EP
European Patent Office
Prior art keywords
self
inductance coil
coil
cylinder
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.)
Expired - Lifetime
Application number
EP94202487A
Other languages
English (en)
French (fr)
Other versions
EP0642142A2 (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
Koninklijke 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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
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
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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, intended for inject a low frequency current into a cable of a distribution network television, coil having a winding wound on a cylinder made of molded plastic material containing a rectilinear magnetic core.
  • Such a self-inductance coil is used to inject a current at low frequency, for example of the order of ten amps with a frequency 50 Hz or 60 Hz, in a cable of a television distribution network, to power various devices.
  • a coil comprising a winding wound on a magnetic core straight with gaps is known from French patent N ° 951.963.
  • This patent describes a coil intended for low application frequency (discharge lamps), which one wishes to be able to adjust the threshold of saturation, and which for this purpose has one or more recesses inside of a rectilinear nucleus. The document does not deal with the behavior of the coil regarding blocking of high frequency currents.
  • a coil for the application mentioned above must have a sufficient impedance to block high frequency television signals, and let the low frequency alternating current pass. She must also present few spurious resonances so as not to disturb the band distribution network bandwidth between 5 MHz and more than 1 GHz. Also in such a distribution network the high frequency signals are modulated from parasitic at the frequency of the supply current (modulation of snoring), because of non-linearities due to hysteresis phenomena and of saturation in the material of the coil core.
  • the invention aims to significantly reduce the modulation of snoring by maintaining sufficient impedance for high frequency signals, and without excessively increasing the volume of the coil.
  • the invention takes advantage of the saturation characteristics of open nuclei in according to their geometry and the property of dispersion of the fields magnetic in an open core as a function of frequency.
  • a coil according to the invention is remarkable in that the core magnetic consists of a plurality of trapped ferrite cylinders in the plastic cylinder, placed in the extension one of each other and held in place by their molding in the plastic of the cylinder, with a space between each of them.
  • 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 thereafter.
  • not only the saturation but also possible vibrations generate parasitic modulation.
  • a subsidiary advantage to the times of the molding 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 ferrite in ferroxcube 4B1 material with a diameter 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 includes a number of turns between 20 and 40, wound with a thread of which the diameter is between 8 and 16 tenths of a millimeter.
  • Figure 1 is a diagram of the use of a coil according to the invention.
  • Figure 2 is an axial sectional view of a cylindrical core for a coil according to the invention.
  • the current in question is usually between eight and twelve amps.
  • the magnetic core according to the invention shown in Figure 2, consists three ferrite cylinders 4, 5, 6 placed end to end with a space between each of them.
  • This ferrite cylinders are overmolded in a cylinder 3 made of material 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 comprises 24 turns wound with a 10/10 th of a millimeter wire.
  • thermoplastic material used for the manufacture of a self-inductance coil according to the invention.
  • thermoplastic material used for the manufacture of a self-inductance coil according to the invention.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Claims (4)

  1. Drosselspule zum Injizieren eines Niederfrequenzstroms in ein Kabelfernsehnetzwerk, wobei die Spule aus Windungen besteht, die auf einen Formzylinder aus Kunststoffmaterial aufgewickelten sind, der einen geradförmigen Magnetkern enthält, dadurch gekennzeichnet, daß der Magnetkern aus einer Vielzahl Ferritzylinder (4, 5, 6) gebildet wird, in den Zylinder aus Kunststoffmaterial (3) eingeschlossen, jeweils aneinanderschließend angeordnet und von der Kunststofform im Zylinder gehalten, mit einem jeweiligen Freiraum dazwischen.
  2. Drosselspule nach Anspruch 1, dadurch gekennzeichnet, daß sie drei Ferritzylinder aufweist.
  3. Drosselspule nach Anspruch 1, dadurch gekennzeichnet, daß der Formzylinder aus Kunststoffmaterial auf seiner Außenfläche eine gewindeförmige Rille (7) aufweist.
  4. Drosselspule nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, daß die Spule zum Sperren von Signalen mit einer Frequenz zwischen 5 Megahertz und über 1 Gigahertz unter Gewährleistung dessen bestimmt ist, Ströme von ca. zehn Ampere und 50 Hz durchzulassen, der Kern aus drei Ferritzylindern aus "Ferroxcube 4B1" mit einem Durchmesser zwischen 7 und 13 Millimetern, mit einer jeweiligen Länge zwischen 8 und 16 Millimetern und durch Freiräume zwischen 1 und 3 Millimetern voneinander getrennt, und die Spule enthält zwischen 20 und 40 Wicklungen aus einem Draht, dessen Durchmesser zwischen 8 und 16 zehntel Millimetern liegt.
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 EP0642142A2 (de) 1995-03-08
EP0642142A3 EP0642142A3 (de) 1995-05-10
EP0642142B1 true 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)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509264A1 (de) * 1995-03-15 1996-09-19 Siemens Matsushita Components Magnetischer und/oder magnetisierbarer Wickelträger
FR2775824A1 (fr) * 1998-03-03 1999-09-03 Philips Electronics Nv Composant a self inductance
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
FR2811135B1 (fr) * 2000-06-29 2002-11-22 Memscap Microcomposant du type micro-inductance ou microtransformateur
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
ES2377484T3 (es) * 2003-09-03 2012-03-28 Pfizer, Inc. Compuestos de bencimidazolona que tiene actividad agonista del receptor 5-HT
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
CN103392066B (zh) 2011-02-22 2016-06-22 费德罗-莫格尔点火公司 具有改进能效的电晕点火器
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

Family Cites Families (14)

* 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
CH240899A (de) * 1942-09-05 1946-01-31 Philips Nv Hochfrequenzspule.
FR951963A (fr) * 1944-03-11 1949-11-07 Lampes Sa Perfectionnements aux bobines de self à noyau magnétique central rectiligne
US2776413A (en) * 1951-05-04 1957-01-01 Quality Components Inc Core for choke coil or resistor
US3173080A (en) * 1959-05-25 1965-03-09 Maeda Hisao Electric circuit having distributed constants
DE1259976B (de) * 1962-09-12 1968-02-01 Siemens Ag Hochfrequenzspule fuer Frequenzen groesser 1 MHz
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
JPS6012712A (ja) * 1983-07-01 1985-01-23 Nippon Ferrite Ltd 線輪およびその製造方法
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
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 (1)

* Cited by examiner, † Cited by third party
Title
ENCYCLOPOEDIA UNIVERSALIS, 1980, volume 6, pages 1039-1042, "FERRITES" *

Also Published As

Publication number Publication date
EP0642142A2 (de) 1995-03-08
DE69429752D1 (de) 2002-03-14
EP0642142A3 (de) 1995-05-10
JPH07122432A (ja) 1995-05-12
TW252206B (de) 1995-07-21
US5767759A (en) 1998-06-16
DE69429752T2 (de) 2002-09-12

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