EP1023736B1 - Drossel zur funkentstörung - Google Patents

Drossel zur funkentstörung Download PDF

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Publication number
EP1023736B1
EP1023736B1 EP98958180A EP98958180A EP1023736B1 EP 1023736 B1 EP1023736 B1 EP 1023736B1 EP 98958180 A EP98958180 A EP 98958180A EP 98958180 A EP98958180 A EP 98958180A EP 1023736 B1 EP1023736 B1 EP 1023736B1
Authority
EP
European Patent Office
Prior art keywords
connecting wire
choke
alloy
strip
magnetic 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.)
Expired - Lifetime
Application number
EP98958180A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1023736A1 (de
Inventor
Markus Brunner
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.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
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 Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of EP1023736A1 publication Critical patent/EP1023736A1/de
Application granted granted Critical
Publication of EP1023736B1 publication Critical patent/EP1023736B1/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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • the invention relates to a choke for radio interference suppression and a process for its manufacture.
  • conductor chokes are chokes for radio interference suppression, which are ring-shaped, on a wire or a pin of a circuit component attachable magnetic tape cores are formed.
  • Chokes for radio interference suppression are from the data book Toshiba Corporation, Material & Components, Technical Data, "Amorphous Noise Suppressor, AMOBEAD TM, Serial No. E-63001, January 30, 1988.
  • Single-line chokes assign to other components Interference suppression, such as an RC low pass, the advantage of large inductances even with large choke currents as well as a broadband interference suppression in the range of 10 kHz to 30 MHz. Furthermore, they have a special high insertion loss even in the lower frequency range. After all, they have low overall losses and small component sizes on.
  • Interference suppression such as an RC low pass
  • single-line chokes in the form of small wound magnetic tape cores made of amorphous alloys, specified in particular on a cobalt basis.
  • the wobbled Magnetic tape cores become conductors that conduct electricity of the component causing the fault is postponed or attached. There they act as saturable chokes, with their Help high-frequency interference during a switching operation can be effectively combated. Following the Switching takes place through the saturation of the magnetic material of the magnetic tape core, however, no influence on the one to be protected Circuit more.
  • amorphous alloys usually do this entangling band on a winding shaft made of tool steel in usually fixed by spot welding. After welding the magnetic tape core with the desired geometric Data wrapped. Finally the tape ends again by spot welding on the outer circumference of the magnetic tape core attached. After completing the welding process, the Magnetic tape core sheared off the winding shaft. The resulting one annular magnetic tape core can then be known Be processed further. In particular, the Magnetic tape core subjected to a heat treatment and then covered with a passivation layer.
  • EP A 0655754 describes an inductive component where a magnetic film is tight around a lead wire to one Magnetic tape core is wound. This document discloses a choke for radio interference suppression according to the preamble of claims 1 and 2.
  • the object of the present invention is therefore a throttle to specify radio interference suppression, with as much as possible low assembly effort can be produced and for removal the heat loss from the magnetic tape core is very good has thermal contact of the magnetic tape core to the circuit.
  • the choke for radio interference suppression Manufacture of magnetic tape cores using a lead wire which serves as a winding shaft for the magnetic tape core.
  • the material The connecting wire is made of an alloy that is both spot weldable for welding the magnetic tape to be entangled, as well as solderable for later assembly of the Component.
  • the used as the winding shaft of the magnetic tape core The lead wire remains after the core winding in the magnetic tape core and then serves as the electrical conductor of the Component.
  • the magnetic tape cores are removed if necessary a heat treatment to adjust the magnetic properties subjected. Then a wrapping is offered of the magnetic tape core, for example through a common varnish or a shrink tube. Then as a varnish Epoxy powder paint can be used. However, it would also be conceivable the magnetic tape core with a thermoplastic or thermosetting To encase molding compound.
  • the component then present is a conventional one on the outside Resistance comparable and can be taken for granted as such by appropriate placement machines such as they are common in printed circuit board manufacturing become. It is particularly advantageous if the chokes according to the invention for radio interference suppression as SMD components are executed.
  • 1 denotes a connecting wire.
  • the connecting wire 1 can be a circular, rectangular, or have a similar cross-section. It would also be conceivable that the connecting wire 1 is band-shaped.
  • Around the connecting wire 1 around a magnetic tape core 2 is arranged.
  • the Magnetic tape core 2 typically consists of a thin one Tape or a thin film, the coil-like around the connecting wire 1 is wrapped around.
  • a protective coating to protect the magnetic tape core 2 3 is provided in the area of the magnetic tape core 2 his.
  • the connecting wire 1, the magnetic tape core 2 and the protective coating 3 then form a single-line choke 4.
  • the ends of the connecting wire 1 can serve as a connector. Typically, however, the ends of the lead wire 1 soldered into the circuit of an integrated circuit.
  • FIG. 2 shows a further single-line choke 4, which here as so-called SMD component (surface mounted device component) is executed.
  • SMD component surface mounted device component
  • the inductor 4 in Figure 2 differs from that in Figure 1 essentially by the housing design.
  • This one SMD component shown is for surface mounting on a Circuit board suitable.
  • the connecting wire 1 is not in here from the magnetic tape core 2 covered area L-shaped. It would also be conceivable, as shown in the example in FIG. 2, that the areas not covered by the magnetic tape core 2 of the connecting wire 1 angled several times L-shaped are.
  • a circuit board is designated by 5 in FIG.
  • the single-line throttle 4 is developed on the L-shaped Ends of the connecting wire 1 with a solder connection 6 the circuit board 5 connected.
  • a wire is cut to a predetermined length, which then forms the connecting wire 1.
  • the magnetic tape core 2 first becomes an amorphous thin ribbon or a thin magnetic sheet at one end on the lead wire 1 welded. Then this thin tape becomes spool-like wound around the lead wire 1 to a magnetic tape core 2. The second end of the tape is then also by spot welding on the outer circumference of the wound Coil attached. This is typically how you get an annular magnetic tape core (2). Particularly advantageous it is when the annular magnetic tape core (2) is closed Ring is formed.
  • a heat treatment step then typically closes on.
  • the heat treatment is typically carried out in the Run.
  • the throughput speed is chosen so that the thin band for a heat treatment time 0.5sec ⁇ t ⁇ 120sec to a temperature of 450 ° C ⁇ T ⁇ 550 ° C.
  • This heat treatment step serves, among other things, the mechanical one Relaxation treatment of the magnetic tape core 2. Die Permeability and thus the correlated insertion loss can be optimized in the desired way become.
  • the magnetic tape core 2 in one Magnetic field treated to set the desired hysteresis.
  • the protective coating 3 serves in particular the mechanical Protection of the magnetic tape core 2.
  • the material of the connecting wire 1 is both weldable and solderable. Furthermore, it is essential that the material used for the connecting wire 1 a sufficiently high electrical conductivity as well as a has high thermal conductivity. It's also imperative required that the material of the connecting wire 1 itself is non-ferromagnetic. Otherwise it could be in use the single-conductor chokes 4 through eddy current effects to one extreme heating of the connecting wire 1 come.
  • connection wire 1 will be ideally met by copper-based alloys.
  • resistance increasing Elements such as nickel, beryllium, Chromium, zircon, manganese or similar elements have been added.
  • the most common are commercially available resistance alloys such as copper-nickel alloys or copper-manganese alloys.
  • a sufficiently good spot weldability of the lead wire 1 with the ferromagnetic materials of the magnetic tape core 2 is achieved with an alloy for the lead wire, which is composed of the formula CU 100- (a + b) Ni a Mn b .
  • a and b are given in% by weight and meet the following conditions: 6 ⁇ a ⁇ 80 and 0 ⁇ b ⁇ 12.
  • the best results are achieved with a relatively low alloyed nickel content of approx. 6% by weight or manganese content of approx. 3% by weight.
  • the upper limit of the nickel content of these alloys is on the one hand due to the decrease in the electrical conductivity with increasing nickel content and on the other hand due to the achievement of ferromagnetic compositions.
  • the preferred composition is in the range of approx. 6 to 50% by weight of nickel with additions of 0 to 6% by weight of manganese.
  • the commercial alloy CuMn 3 from the copper manganese system can be used.
  • Another alloy for the connecting wire 1 with good spot weldability is achieved with an alloy which is composed of the formula Cu 100- (a + b) Nn a Ge b .
  • a and b are also given in% by weight and meet the following conditions: 3 ⁇ a ⁇ 6 and 0 ⁇ b ⁇ 6.
  • the material of the magnetic tape core 2 is essential for the function of the choke for radio interference suppression necessary that the material of the magnetic tape core 2 from an amorphous or nanocrystalline, highly permeable, ferromagnetic Alloy. It is particularly advantageous if this alloy is made of soft magnetic material.
  • an amorphous cobalt-based alloy or a nanocrystalline iron-based alloy is used as the material here.
  • These alloys typically have a saturation magnetostriction
  • the simplest form of the protective coating 3 the single-conductor chokes 4 provide the sheathing. It is in Area of the magnetic tape core 2 the component by means of a powder coating coated. In this way you get conventional on the outside Resistances of comparable designs during assembly applied in a donated form on the circuit board 5 and to be soldered.
  • alternating field permeabilities With magnetic tape cores 2 without heat treatment, alternating field permeabilities become reached at 1 kHz of approx. 3000. At higher Measuring frequencies in the range of 1 MHz reduce the alternating field permeability to values around 1700. However, they will Magnetic tape cores 2 subjected to a heat treatment so improve the magnetic properties become clear. The alternating field permeabilities increase to values of approx. 250,000 (1st kHz) or 7000 (1 MHz).
  • FIG. 3 shows a temperature-time diagram that shows the heating of the components of a single-line choke (b) according to the invention in comparison to a single-line choke according to the prior art (a).
  • a a single-line choke according to the prior art

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Soft Magnetic Materials (AREA)
EP98958180A 1997-10-14 1998-09-30 Drossel zur funkentstörung Expired - Lifetime EP1023736B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19745390 1997-10-14
DE19745390 1997-10-14
PCT/DE1998/002914 WO1999019889A1 (de) 1997-10-14 1998-09-30 Drossel zur funkentstörung

Publications (2)

Publication Number Publication Date
EP1023736A1 EP1023736A1 (de) 2000-08-02
EP1023736B1 true EP1023736B1 (de) 2002-05-29

Family

ID=7845527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98958180A Expired - Lifetime EP1023736B1 (de) 1997-10-14 1998-09-30 Drossel zur funkentstörung

Country Status (5)

Country Link
US (1) US6310534B1 (ja)
EP (1) EP1023736B1 (ja)
JP (2) JP4308426B2 (ja)
DE (1) DE59804260D1 (ja)
WO (1) WO1999019889A1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949298A1 (de) * 1999-10-13 2001-04-19 Meto International Gmbh Von einer Pulverlackschicht ummantelte Sicherungselemente für die Warensicherung sowie Guss- oder Spritzteile, die zur Diebstahlsicherung solche Teile enthalten
US20020036085A1 (en) * 2000-01-24 2002-03-28 Bass Ronald Marshall Toroidal choke inductor for wireless communication and control
CN1214410C (zh) * 2001-03-30 2005-08-10 日本贵弥功株式会社 电感元件和壳体
US7023313B2 (en) * 2003-07-16 2006-04-04 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7307502B2 (en) * 2003-07-16 2007-12-11 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7489219B2 (en) * 2003-07-16 2009-02-10 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7760525B2 (en) * 2003-08-21 2010-07-20 Marvell World Trade Ltd. Voltage regulator
US7872454B2 (en) * 2003-08-21 2011-01-18 Marvell World Trade Ltd. Digital low dropout regulator
US8324872B2 (en) 2004-03-26 2012-12-04 Marvell World Trade, Ltd. Voltage regulator with coupled inductors having high coefficient of coupling
US7190152B2 (en) * 2004-07-13 2007-03-13 Marvell World Trade Ltd. Closed-loop digital control system for a DC/DC converter
JP4877455B2 (ja) * 2005-03-28 2012-02-15 ミツミ電機株式会社 二次電池保護モジュールおよびリード実装方法
US8018310B2 (en) * 2006-09-27 2011-09-13 Vishay Dale Electronics, Inc. Inductor with thermally stable resistance
CN101877440A (zh) * 2009-04-29 2010-11-03 深圳富泰宏精密工业有限公司 防辐射连接线
CN104995698A (zh) 2013-02-13 2015-10-21 株式会社村田制作所 电子部件
KR101400458B1 (ko) * 2013-08-02 2014-05-27 금오공과대학교 산학협력단 초크코일 생산장치
JP6326615B2 (ja) * 2013-12-24 2018-05-23 北川工業株式会社 ノイズフィルタ端子
JP6610388B2 (ja) * 2016-04-01 2019-11-27 日立金属株式会社 配電部材及び磁性体コアの固定構造

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2637114B2 (ja) * 1987-09-22 1997-08-06 株式会社東芝 インダクタンス素子
US4958134A (en) * 1987-09-04 1990-09-18 Kabushiki Kaisha Toshiba Noise suppression device comprising a toroid winding
JPH02292805A (ja) * 1989-05-02 1990-12-04 Toshiba Corp 磁性部品
JP2850640B2 (ja) * 1992-04-28 1999-01-27 株式会社デンソー 混成集積回路装置
JPH07201610A (ja) * 1993-11-25 1995-08-04 Mitsui Petrochem Ind Ltd インダクタンス素子およびこれを用いた集合素子
JPH08172019A (ja) * 1994-12-19 1996-07-02 Toshiba Corp インダクタンス素子

Also Published As

Publication number Publication date
EP1023736A1 (de) 2000-08-02
JP2008263213A (ja) 2008-10-30
JP4308426B2 (ja) 2009-08-05
DE59804260D1 (de) 2002-07-04
JP2001524746A (ja) 2001-12-04
US6310534B1 (en) 2001-10-30
WO1999019889A1 (de) 1999-04-22
JP4452808B2 (ja) 2010-04-21

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