EP1301931A1 - Inducteur de type i comme microinducteur haute frequence - Google Patents

Inducteur de type i comme microinducteur haute frequence

Info

Publication number
EP1301931A1
EP1301931A1 EP01969335A EP01969335A EP1301931A1 EP 1301931 A1 EP1301931 A1 EP 1301931A1 EP 01969335 A EP01969335 A EP 01969335A EP 01969335 A EP01969335 A EP 01969335A EP 1301931 A1 EP1301931 A1 EP 1301931A1
Authority
EP
European Patent Office
Prior art keywords
cores
bodies
winding
inductor
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Withdrawn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
EP01969335A
Other languages
German (de)
English (en)
Inventor
Axel Von Der Weth
Klaus Seemann
Immanuel Fergen
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.)
Karlsruher Institut fuer Technologie KIT
Original Assignee
Forschungszentrum Karlsruhe GmbH
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
Priority claimed from DE10104648A external-priority patent/DE10104648B4/de
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of EP1301931A1 publication Critical patent/EP1301931A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01F17/045—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/0006—Printed inductances
    • H01F17/0033—Printed inductances with the coil helically wound around a magnetic core

Definitions

  • I-inductor as a high-frequency micro-inductor
  • the invention relates to an I-inductor, which is a passive magnetic component, a choke.
  • the shape of the magnetically flowing parts results in a reduction in the fields emerging from the component, which greatly reduces the formation of shielding currents in carrier devices for the component or electromagnetic interference in neighboring assemblies.
  • the arrangement of an I-inductor is comparatively compact, so that parasitic capacitances can be kept small. By skillfully conditioning and utilizing the surface, resistance-reducing conductor arrangements can be used, which enable the quality to be increased.
  • Toroidal choke or toroidal microinductors are similar in their structure and mode of action. However, it can only be constructed with isotropic materials. Magnetic materials with uniaxial anisotropy, which is uniaxial in technical usage, cannot be used. According to the current state of material development, isotropic magnetic materials are no longer suitable for the frequency range above 1 GHz [I].
  • the assembly also includes solenoids or solenoids. Different versions are known:
  • the solenoid is already used as a planar coil - the coil axis is perpendicular to the substrate. These are only suitable for high frequencies to a limited extent, since shielding currents in the substrate, which reduce the inductance, are excited. These components are of low quality when used in high-frequency technology.
  • the arrangement is not very efficient, especially when using high frequencies, the size of the component increases, which results in an increase in parasitic capacitances.
  • the inductance can be increased by using additional magnetic layers on the end faces of the planar coil, but the cutoff frequency of the coil then drops.
  • An increase in quality by using wider conductor elements in a planar coil is only possible in a small area due to the increase in the area then required [II]. Above 0.1 GHz, this setup is uninteresting due to excessive capacity and eddy current problems and only works with magnetically isotropic materials.
  • Strip lines are also used as inductors. Their achievable quality is in the frequency range mentioned because of the wrestle inductance too low for technical application. To increase the quality, the conductor can be surrounded with a magnetic material. This solution is already used as a macroscopic component with isotropic magnetic materials and discussed in the literature as a microinductor application [IV]. Since, for example, the shape anisotropy of thin layers is not taken into account here and the conditions used are greatly simplified, the application in microsystem technology is rather questionable. The arrangement leads to a considerable excitation of shielding currents in the substrate, which complicates the industrial high-frequency application. Since considerable stray fields can be expected, this must also be taken into account when designing the surrounding electromagnetic assemblies.
  • Toroidal chokes made of materials with magnetically uniaxial anisotropy are ineffective. Magnetic isotropic materials cannot be used for the intended frequency range.
  • Solenoids are not suitable because of the stray fields that cause shielding currents and thus disturbances in neighboring assemblies.
  • Strip lines have too little inductance or too high parasitic capacitance.
  • the I-inductor consists of at least two band-shaped bodies / cores made of magnetically permeable material which are of equal length and which are necessary for the intended magnetic flux through them in a rectangular delimiting plane with a gap formation, band-shaped, parallel to one another with their respective longitudinal axis.
  • These bodies / cores are provided with at least one winding in such a way that when the winding is loaded, the magnetic field generated by the winding in the associated body / core is strengthened and not weakened by the magnetic field generated in the associated winding of the winding in the immediately adjacent body / core.
  • the magnetic flux runs completely or virtually completely in the magnetic material and passes into the adjacent body at the winding-free gaps in the end region.
  • Claim 2 describes the material of the body / core as magnetically isotropic. Different in claim 3, where it is specified as unidirectional or uniaxial magnetic anisotropic.
  • the geometric relation of the two outer bodies / cores of the arrangement to the ones in between is expressed in claim 4.
  • the two outer ones are of equal width and the ones in between are at least as wide.
  • the respective winding of one solenoid per body / core is in claim 5.
  • the turns of a winding or windings with the bodies / cores form a woven structure.
  • a turn or the turns can also consist of a strip conductor at both ends forms a connection lug for "the external connection (claim 7).
  • the windings of the winding consist of band-shaped square elements, namely in the case of:
  • a rectangular element of the turn is lined up with its equally long side and makes electrical contact.
  • the turns with the bodies / cores are in a tissue-like manner while maintaining the minimum necessary insulation spacing and there is a connection tab for the external connection at each end of a winding.
  • the I-Inductor is therefore suitable for high cut-off frequencies up to 10 GHz with sufficient quality Q ⁇ 500.
  • the RF permeability expediently lies in the direction of the magnetic field axis in the cores.
  • the shielding currents are significantly reduced by the arrangement of the conductor elements and the body or layers of magnetic material. Since the design can be kept very compact, the parasitic capacitance is low.
  • FIG. 1 shows the basic sketch of the I inductor
  • FIG. 2 the tape winding for the I inductor
  • 3a shows the construction of double trapezoidal elements with two cores
  • 3b shows the structure of double trapezoidal and rectangular elements with more than two cores
  • FIG. 4 the I-inductor with secondary windings as an HF transmitter
  • FIG. 5 the I inductor in the gap of a C magnet
  • FIG. 6 shows the inductance curve of the I inductor according to FIG. 3a.
  • the I-inductor which is now described in more detail is an HF microinductor with typical dimensions as indicated in FIG. 3a. It is a component for microsystem technology in planar technology and is used in facilities for high frequencies at 1 - 10 GHz. It is made using thin-film technology.
  • the length of the I-inductor is limited so that the physics necessary for the application, i.e. the planned microwave technical property, is emphasized, namely the upper limit for the overall length in the x direction (see coordinate system in Figures 1 and 5)
  • ⁇ is a pure number factor; 0.1 was found to be optimal for technical application, c is the speed of light, f is the frequency and ⁇ rx is the relative magnetic permeability constant in the x-direction.
  • the I-inductor consists of two parallel, expediently rectangular bodies - also in magnetic terms: cores - made of a magnetically permeable material.
  • a solenoid is wound on each iron core.
  • Both solenoids can be electrically connected differently, once each connected separately, the other in series or in parallel, but in any case in such a way that the magnetic field in one core has the opposite direction to that in the other.
  • both solenoids when both solenoids are energized, there is a magnetic circuit, namely through the two cores and over the two gaps at the two end regions of the arrangement, the magnetic flux thus closes over the two gaps.
  • the gap can be filled with the same magnetic material.
  • the gap should be as small as possible, or at least so small that there is still sufficient electrical insulation resistance for operation.
  • the size of the entire arrangement is also limited by parsitary capacities.
  • the two solenoids are wound in Figure 2 from a winding and thus not separately.
  • the sketched winding technique shows that one turn of the upper solenoid is always connected in series to one of the lower and vice versa until the entire winding is finished.
  • the respective winding direction is such that the two magnetic fields generated add up in a circle and do not subtract or cancel. So there are not two separate solenoids in a row.
  • This structure can be easily created with planar technology or layering technology by successively building up the layers.
  • the respective conductor connections must be retrofitted in the gap and on the outer longitudinal edges.
  • the construction according to FIG. 3a is favorable in terms of production technology - also in terms of its high-frequency properties.
  • the winding in principle as in Figure 2, is constructed from double trapezoidal conductor elements made of copper or aluminum by stringing them together. One half of the double trapezoidal structure lies on the back of one body, the other half is pulled through the gap and placed on the other body. This is followed by the next double trapezoidal conductor element in the same manner until the double winding on the two bodies or cores is finished.
  • the two windings consist of six double trapezoidal elements made of aluminum.
  • a connecting lug is then attached to both ends for the electrical connection.
  • the structure using parallelogram elements goes accordingly.
  • Both cores are made of an iron alloy, in which the magnetic anisotropy can be adjusted by the manufacturing process.
  • the representation on the three-core arrangement according to FIG. 3b is sufficient.
  • the dimensions in it are exemplary.
  • the trapezoidal conductor elements lie behind as before on the two outer bodies / cores, the body / core lying in between has the rectangular conductor strips which are as wide on both sides as ' the smaller of the two parallel trapezoidal sides and also connect along there.
  • the assignment with this technique is only for the intermediate body / core and thus for the intermediate body / core up to half the case.
  • the rectangular conductor elements are lined up alternately behind and in front on an intermediate body / core along the same. In order to have the greatest possible coverage of the same by the conductor of the winding in the case of more than two bodies / cores across the winding width, each body / core must be wound with a conductor on its own and not simultaneously with one or the other.
  • FIG. 6 shows the course of the inductance of the I inductor in nH as a function of the permeability ⁇ rx present in the x direction, the windings of which are constructed from double trapezoidal elements according to FIG. 3a.
  • the core or iron layers here have a contour of 320 x 40 x 2 ( ⁇ m) 3 .
  • the principle of antiparallel magnetic excitation is used to build a high-frequency transmitter and thus the electrical isolation of circuits is achieved, or it is used to build a microtransformer ( Figure 4).
  • the frequency range is increased by applying an anisotropy.
  • this is achieved by an external, static and perpendicular magnetic field to the I inductor, which is generated, for example, by a planar H or C magnet (FIG. 4).
  • the core of the planar H or C magnet is also made of the same material with uniaxial anisotropy for simplifying manufacturing reasons.
  • the cut-off frequency of the component is increased with increasing magnetic flux density, or the inductance is reduced.
  • the C-magnet should be the preferred component, less the H-magnet.
  • FIG. 5 shows a top view of the I inductor installed in the air gap of the C magnet.
  • the implementation is carried out using planar technology. The dimensions given give an impression of the miniaturization potential.
  • the I-inductor itself is constructed and wound according to Figure 2. It is only 60 - 70 ⁇ m wide and has a gap between the cores and the respective poles of around 4 ⁇ m.
  • the free space in the C interior is approximately (250 ⁇ m) 2 , corresponding to the outer contour of approximately 800 ⁇ m or 0.8 mm in length.
  • the static field generation B stat in the C magnet is extremely efficient, since magnetically uniaxial anisotropic materials have a permeability »1 in the y direction in the static case.
  • the magnetic anisotropy in the C material expresses the permeability of ⁇ s tat ⁇ 350 and ⁇ s taty «1000, for the I-inductor itself the relationships are as follows: ⁇ HF ⁇ ⁇ 350 and
  • the five winding packages on the C-yoke have direct current flowing through them and therefore generate a constant or static magnetic field that penetrates the HF field in the cores of the I-inductor vertically and thus increases the magnetic anisotropy and thus the cutoff frequency. Isotropic magnetic materials cannot be used for this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un inducteur de type I destiné à la technologie haute fréquence ou micro-onde, qui comprend deux noyaux similaires, parallèles l'un à l'autre selon leur axe longitudinal en formant un entrefer. Sur chaque noyau se trouve un enroulement à bobines solénoïdal de sorte que, lors du passage de courant haute fréquence, un circuit magnétique est réalisé à travers les deux noyaux par-dessus l'entrefer au niveau de la zone d'extrémité de l'ensemble. Les enroulements formant le champ magnétique sont similaires. En principe, il est possible d'utiliser comme matériau du noyau un matériau magnétiquement isotrope, mais l'effet pour la technologie micro-onde ne peut être produit, pour une utilisation techniquement valable, qu'avec un matériau magnétiquement anisotrope. L'orientation magnétique préférée va dans le sens de l'axe longitudinal de chaque noyau.
EP01969335A 2000-07-14 2001-07-04 Inducteur de type i comme microinducteur haute frequence Withdrawn EP1301931A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10034413 2000-07-14
DE10034413 2000-07-14
DE10104648A DE10104648B4 (de) 2000-07-14 2001-02-02 Hochfrequenz-Mikroinduktivität
DE10104648 2001-02-02
PCT/EP2001/007616 WO2002007172A1 (fr) 2000-07-14 2001-07-04 Inducteur de type i comme microinducteur haute frequence

Publications (1)

Publication Number Publication Date
EP1301931A1 true EP1301931A1 (fr) 2003-04-16

Family

ID=26006393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969335A Withdrawn EP1301931A1 (fr) 2000-07-14 2001-07-04 Inducteur de type i comme microinducteur haute frequence

Country Status (3)

Country Link
US (1) US6788183B2 (fr)
EP (1) EP1301931A1 (fr)
WO (1) WO2002007172A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100510638B1 (ko) * 1999-02-04 2005-08-31 엘지전자 주식회사 반도체 인덕터 소자
US7026905B2 (en) * 2000-05-24 2006-04-11 Magtech As Magnetically controlled inductive device
DE10144380A1 (de) * 2001-09-10 2003-03-27 Infineon Technologies Ag Magnetisches Bauelement
US9208505B1 (en) * 2002-10-01 2015-12-08 Tiger T G Zhou Systems and methods for providing compensation, rebate, cashback, and reward for using mobile and wearable payment services
US7948364B2 (en) * 2006-05-17 2011-05-24 Trw Automotive U.S. Llc Method and apparatus for determining identifiable tire position location in a tire pressure monitoring system
FR2907590B1 (fr) * 2006-10-23 2009-01-23 Commissariat Energie Atomique Bobinage solenoide annulaire, bobinage comportant plusieurs branches de bobinage et micro-inductance comportant l'un des bobinages
WO2009082706A1 (fr) * 2007-12-21 2009-07-02 The Trustees Of Columbia University In The City Of New York Réseau de capteur cmos actif pour la détection biomoléculaire électrochimique
DE102009008110A1 (de) 2009-02-09 2010-08-19 Epcos Ag Hochfrequenz-Schwingdrossel
WO2012166877A1 (fr) * 2011-05-31 2012-12-06 The Trustees Of Columbia University In The City Of New York Systèmes et procédés pour des inducteurs de puissance couplés
WO2013032753A2 (fr) * 2011-08-26 2013-03-07 The Trustees Of Columbia University In The City Of New York Systèmes et procédés pour des régulateurs de tension intégrés à inductance commutée
ES2382400B1 (es) * 2011-11-21 2013-01-29 Roberto Gabriel Alvarado Motor-generador auto-dinámico por cupla magnética de corona continua y campos axiales de giros opuestos.

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Publication number Priority date Publication date Assignee Title
AU531499B2 (en) * 1978-09-08 1983-08-25 Orb Electrical Steels Limited An isotropic magnetising system
DE3346659A1 (de) * 1983-12-23 1985-07-04 Standard Elektrik Lorenz Ag, 7000 Stuttgart Induktives bauelement
US4891717A (en) * 1986-09-22 1990-01-02 Magnetic Peripherals Inc. Methods and apparatus for performing high density isotropic/perpendicular digital magnetic recording
US5574420A (en) * 1994-05-27 1996-11-12 Lucent Technologies Inc. Low profile surface mounted magnetic devices and components therefor
US5609946A (en) * 1995-10-03 1997-03-11 General Electric Company High frequency, high density, low profile, magnetic circuit components
US6341414B1 (en) * 1999-09-30 2002-01-29 Industrial Technology Research Institute Method for preparing an inductance element

Non-Patent Citations (1)

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Title
See references of WO0207172A1 *

Also Published As

Publication number Publication date
US6788183B2 (en) 2004-09-07
US20030160675A1 (en) 2003-08-28
WO2002007172A1 (fr) 2002-01-24

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