EP3769323A1 - Induktives bauelement und hochfrequenz-filtervorrichtung - Google Patents
Induktives bauelement und hochfrequenz-filtervorrichtungInfo
- Publication number
- EP3769323A1 EP3769323A1 EP19708835.4A EP19708835A EP3769323A1 EP 3769323 A1 EP3769323 A1 EP 3769323A1 EP 19708835 A EP19708835 A EP 19708835A EP 3769323 A1 EP3769323 A1 EP 3769323A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- planar
- inductive component
- track structure
- conductor
- ferromagnetic 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.)
- Granted
Links
- 230000001939 inductive effect Effects 0.000 title claims abstract description 40
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims description 129
- 239000000758 substrate Substances 0.000 claims description 20
- 230000005291 magnetic effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000002500 effect on skin Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01F17/0006—Printed inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- 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
- H01F2017/0066—Printed inductances with a magnetic layer
Definitions
- the present invention relates to an inductive component. Furthermore, the present invention relates to a high-frequency filter device with such an inductive component.
- inductors which are designed for high currents and high frequencies, often realized as discrete components and then soldered to a circuit board.
- WO 2004/030001 A1 discloses a high-frequency choke for printed circuit boards with an inductance and a parallel-connected ohmic resistance.
- the inductance can be realized from a meander-like conductor track.
- An inductive component with a planar track structure and a ferromagnetic core.
- the planar conductor track structure has an upper side and a lower side opposite the upper side.
- Ferromagnetic core is around the planar interconnect structure around
- the ferromagnetic core comprises at least one gap in the region of the top side and / or the underside of the planar conductor track structure.
- the planar conductor track structure has a longitudinal extent, which in the direction of a desired current flow through the planar
- Track structure is aligned.
- Conductor structure has a transverse extent, which is aligned perpendicular to the direction of the desired current flow through the planar conductor track structure.
- a diagonal of the cross section of the ferromagnetic core is oriented perpendicular to the direction of the desired current flow.
- the ferromagnetic core which is preferably configured tubular or annular, at least partially disposed along the longitudinal extent of the planar conductor track structure around the planar conductor track structure around.
- tubular or annular includes in this description preferably in addition to rectangular or polygonal cross-sections also round or oval cross-sections with a.
- a high-frequency filter device with an inductive component according to the invention.
- the present invention is based on the finding that by magnetic cores with an air gap, due to the inhomogeneous distribution of a magnetic field due to the air gap, also a partial current displacement within an electrical conductor can be caused.
- the present invention is therefore based on the idea to take this finding into account and to provide an arrangement for an inductive component, which also for high-frequency electrical currents a high
- planar conductor track structure can initially be any kind of
- Track structure to be understood, which has a cross-sectional area perpendicular to the intended current flow direction in which the expansion in one direction is significantly greater than the extension in a direction perpendicular thereto extending further direction.
- the difference between the two dimensions may be at least one order of magnitude or more.
- Track structures are understood on a printed circuit substrate.
- planar planar structures are also any other planar ones
- planar must Conductor structures are not applied to a full-surface carrier substrate.
- planar conductor track structures it is also possible for the planar conductor track structures to be supported only partially, for example at support points.
- the planar printed conductor structure can consist, for example, of a linearly extending planar electrically conductive element.
- the planar wiring pattern may also be formed by a coil-like wiring pattern having any number of two or more turns. The individual turns can in this case, as will be described in more detail below, for example, side by side or one above the other. A combination of these is possible.
- Conductor structure is arranged opposite the underside of the conductor track structure.
- the upper side and the lower side of the conductor track structure can be connected to one another in each case by means of two side surfaces in the case of a, for example, rectangular cross-section of the conductor track structure.
- the planar printed conductor structure is surrounded along a predetermined section with the ferromagnetic core.
- the ferromagnetic core can at least approximately completely enclose the planar conductor track structure.
- the ferromagnetic core has one or more gaps in its circulation. This gap or these gaps are arranged in particular in the region of the upper side and / or the lower side of the planar conductor track structure.
- the term "in the region" of the upper side or the lower side is to be understood as meaning that a virtual line, which can run perpendicular to the upper side or the lower side, also runs through such a gap.
- a ferromagnetic core of an inductive component according to the present invention comprises preferably no such lateral column in the region of the side surfaces of the planar conductor track structure.
- the ferromagnetic core may be formed of any ferromagnetic material. Such ferromagnetic materials are known and are therefore not explained here.
- the gap in the ferromagnetic core may be an air gap or a gap at least partially filled with a dielectric material.
- the ferromagnetic core may in this case have gaps both in the region of the upper side and in the region of the lower side of the planar printed conductor structure.
- the arrangement of one or more gaps in the region of the upper side of the planar printed conductor structure and in the region of the underside of the printed conductor structure can be identical or at least approximately equal.
- fundamentally different designs with one or more gaps in the region of the upper side or the lower side of the planar printed conductor structure are also possible.
- the ferromagnetic core comprises a plurality of gaps.
- a plurality of gaps can be provided both in the region of the upper side and in the region of the lower side.
- the individual gaps can each have an identical gap width.
- the gap width of individual column can also be varied depending on further requirements.
- the planar conductor track structure may comprise a plurality of parallel conductor tracks.
- Each of these individual parallel conductor tracks can also have a planar structure, wherein the cross section of such a track structure in a spatial direction is significantly greater than the cross section in a perpendicular thereto Spatial direction.
- an increased inductance of the inductive component can be achieved by using a plurality of strip conductors.
- the planar conductor track structure comprises a plurality of conductor tracks arranged one above the other.
- the term "one above the other" is to be understood as meaning that in each case the underside of a conductor track and the upper side of an adjacent conductor track are located opposite one another.
- the individual conductor tracks can be spaced apart, for example, by means of an electrically insulating substrate. In this way, a multi-turn coil arrangement can be realized.
- the planar conductor track structure may comprise a plurality of coplanar conductor tracks. In such a coplanar arrangement several, in particular a plurality of parallel conductor tracks are arranged in a common plane. For example, the individual
- Conductor tracks may be arranged on a common carrier substrate. It is understood that the arrangement of several komplanar arranged
- all the gaps of the ferromagnetic core may be filled with the same filler material. But also different filling materials for each column are possible.
- the magnetic flux can be influenced and thereby the current distribution within the planar conductor track structure can be controlled.
- the magnetic core are mechanically stabilized.
- the ferromagnetic core comprises rounded edges in the transition to the gap.
- the magnetic core in the region of the top side and / or the underside of the planar printed conductor structure comprises a material with ferromagnetic powder particles.
- the partial use of such ferromagnetic powder particles can also influence the magnetic flux.
- magnetic cores having such ferromagnetic particles are also known as powder cores or cores having a so-called distributed air gap.
- the inductive component comprises a
- planar printed conductor structure can be connected to the underside and / or the upper side with a dielectric carrier substrate.
- a dielectric carrier substrate For example, it may be in the dielectric
- Carrier substrate to act around a printed circuit board substrate As a result, for example, a planar can be particularly simple
- Track structure can be realized.
- multi-layered structures with a plurality of carrier substrates and / or a plurality of planar
- Figure 1 a schematic representation of a cross section through a
- Figure 2 is a schematic representation of a cross section through a
- Figure 3 a schematic representation of a cross section through a
- Figure 4 a schematic representation of a cross section through a
- Figure 6 a schematic representation of a cross section through a
- Figure 6 shows a cross section through an arrangement for an inductive
- Printed wiring pattern 110 On a carrier substrate 130 is an electrically conductive Printed wiring pattern 110 applied.
- it may be a printed conductor on a printed circuit board substrate.
- the height h of the conductor track structure 110 is significantly less than the width b of the
- the conductive pattern 110 is surrounded by two half-shells 120 which are to form a magnetic core. Due to the continuous carrier substrate 130, the core formed by the two half shells 120 is interrupted at the positions 121. Therefore, the
- magnetic core at the positions 121 each have a gap, which increases the magnetic field strength in this area.
- the electrical conductor 110 is traversed by a high-frequency electrical current, the current flow also shifts into the edge regions of the electrical conductor 110. In this way, the maximum current carrying capacity is significantly reduced.
- FIG. 1 shows a schematic illustration of a cross section through an inductive component 1 according to an embodiment.
- the inductive is a schematic illustration of a cross section through an inductive component 1 according to an embodiment.
- Component 1 comprises a planar conductor track structure 10 and a
- the cross section of the planar conductor track structure 10 has a height h which is significantly smaller than the width b of the planar conductor track structure.
- the width b points in the direction of
- the width b may be greater than the height h by more than an order of magnitude, that is to say the factor 10.
- the planar printed conductor structure 10 is surrounded by a ferromagnetic core 20.
- the ferromagnetic core 20 may be formed of any ferromagnetic material.
- the planar conductor track structure 10 has, in particular, an upper side 11 and an underside 12 opposite the upper side 11.
- the top 11 and the Bottom 12 are formed by those sides which have the larger dimensions, in this case consequently the width b, which is significantly greater than the height h.
- the conductor track structure 10 can be formed, for example, from any electrically conductive material, such as copper.
- planar wiring pattern 10 may be realized as a wiring pattern of a printed circuit.
- any other planar interconnect structures are possible.
- the one or more gaps 21 are arranged in a region A of the upper side 11 and / or the lower side 12.
- a virtual imaginary line V which is perpendicular to the upper side 11 or the lower side 12, passes through the corresponding gap 21.
- such a virtual line is shown as a dashed line V.
- the inductive component 1 expressly has no gap in the region B of the side surfaces, that is to say in the region of the surfaces which connect the top side 11 and the underside 12 to one another.
- the gap 21 of the ferromagnetic core 20 may be filled with a dielectric filling material 22.
- a dielectric filling material 22 can also influence the course of the magnetic field lines and thus the current distribution within the planar conductor track structure 10. If there are a plurality of gaps 21 in the ferromagnetic core 20, the individual gaps 21 can either be filled with the same filling material 22 or, if appropriate, different dielectric filling materials 22 can also be used for the individual gaps 21.
- edges of the ferromagnetic core 20 in the region of the transition to the columns 21 may be rounded.
- Figure 2 shows a schematic representation of a cross section through an inductive component 1 according to another embodiment.
- the embodiment shown in Figure 2 differs from the embodiment described above in particular in that instead of a single gap 21 in the region A of the top 11 and the bottom 12 of the planar
- Track structure 10 now several columns 21 are provided. However, the number of four columns shown here is just one example.
- any other number of columns 21 on the top and / or the bottom of the planar conductor track structure 10 is possible.
- column 21, as shown here, both in the region of the top 11 and in the region of the bottom 12 can be attached. In principle, however, it is also possible to provide the column 21 only in the region of the upper side 11 or alternatively only in the region of the lower side 12.
- Figure 3 shows a schematic representation of a cross section through an inductive component 1 according to yet another embodiment. The embodiment shown here differs from the previously
- planar Conductor structure 10 is disposed on an electrically insulating carrier substrate 30.
- one side of the planar conductor track structure 10, here in particular the underside 12 of the planar conductor track structure 10, is connected to one side of the carrier substrate 30.
- planar printed conductor structure 10 In addition to the embodiment of a planar printed conductor structure 10 shown here, arrangements with a plurality of printed conductors are also possible. For example, planar conductor tracks may be arranged on two opposite sides of the carrier substrate 30. In addition, it is
- a layer structure with a plurality of carrier substrates 30 and optionally a plurality of planar conductor tracks possible. It is also possible, if appropriate, to arrange a plurality of conductor tracks as a planar printed conductor structure 10 next to one another on the carrier substrate 30.
- Figure 4 shows a schematic representation of a part of an inductive
- Track structure 10 comprise a plurality of individual tracks 10-i. These individual conductor tracks 10-i can be arranged one above the other, for example. On top of each other in this context, for example, that in each case the underside of a conductor track 10-1 to an upper side of a
- the individual conductor tracks 10-i of the conductor track structure 10 may also have different dimensions.
- the upper two conductor tracks 10-1 and 10-2 have a smaller width than the conductor tracks 10-3 and 10-4 arranged underneath.
- the width d 1, d 2 of the column 21 can vary.
- the width d 1, d 2 of the column 21 can be adapted as a function of the respective interconnect structure 10.
- a larger gap width d 1 can be selected, while for a smaller number of Conductor tracks 10-i or a lower expected current density a smaller gap width d2 can be adjusted.
- the number of gaps 21 may be varied across the width according to the configuration of the wiring pattern 10. In this way, depending on the characteristics of the planar printed conductor structure 10, the density of the gaps 21 in the ferromagnetic core 20 can be varied.
- FIGS. 5a and 5b show a perspective view of an inductive component 1 according to an embodiment.
- the planar conductor track structure 10 is shown.
- the planar conductor track structure 10 in this case has several turns.
- the partial image 5b shows how the planar printed conductor structure 10 can be enclosed by a ferromagnetic core 20. This ferromagnetic core 20 can be
- the course of the planar conductor track structure 10 have one or more column 21.
- the course of the current flow within the planar conductor track structure 10 can be influenced in a targeted manner.
- the gap 21 of the ferromagnetic core 20 is also designed annular.
- the inductive component 1 described above can be used, for example, as an inductive filter element for a high-frequency filter device.
- Resistor and / or a capacitive component can be combined.
- the present invention relates to an inductive component with a planar conductor track structure.
- the planar track structure is along a given section with a ferromagnetic core
- gaps are provided in the ferromagnetic core in a targeted manner.
- the gaps in the ferromagnetic core are arranged in regions above and / or below the planar conductor track structure.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Composite Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018204366.3A DE102018204366A1 (de) | 2018-03-22 | 2018-03-22 | Induktives Bauelement und Hochfrequenz-Filtervorrichtung |
PCT/EP2019/055145 WO2019179749A1 (de) | 2018-03-22 | 2019-03-01 | Induktives bauelement und hochfrequenz-filtervorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3769323A1 true EP3769323A1 (de) | 2021-01-27 |
EP3769323B1 EP3769323B1 (de) | 2023-08-30 |
Family
ID=65657467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19708835.4A Active EP3769323B1 (de) | 2018-03-22 | 2019-03-01 | Induktives bauelement und hochfrequenz-filtervorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US11817243B2 (de) |
EP (1) | EP3769323B1 (de) |
CN (1) | CN111886661B (de) |
DE (1) | DE102018204366A1 (de) |
WO (1) | WO2019179749A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024167847A1 (en) * | 2023-02-06 | 2024-08-15 | Tesla, Inc. | Flux shaping inductor structures for reduced high-frequency losses |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2750769B1 (fr) * | 1996-07-05 | 1998-11-13 | Thomson Csf | Capteur de champ magnetique en couche mince |
DE19854234C1 (de) | 1998-11-24 | 2000-06-21 | Bosch Gmbh Robert | Induktives Bauelement mit planarer Leitungsstruktur und Verfahren zur Herstellung desselben |
AU2003271534A1 (en) | 2002-09-19 | 2004-04-19 | Ilfa Industrieelektronik Und Leiterplattenfertigu Ng Aller Art Gmbh | Hf-reactor |
DE102006022785A1 (de) | 2006-05-16 | 2007-11-22 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Induktives Bauelement und Verfahren zum Herstellen eines induktiven Bau-elements |
US7612553B2 (en) * | 2007-07-26 | 2009-11-03 | Honeywell International Inc. | Current sensor having sandwiched magnetic permeability layer |
US8149080B2 (en) * | 2007-09-25 | 2012-04-03 | Infineon Technologies Ag | Integrated circuit including inductive device and ferromagnetic material |
US9947450B1 (en) * | 2012-07-19 | 2018-04-17 | The Boeing Company | Magnetic core signal modulation |
US20140159499A1 (en) * | 2012-12-06 | 2014-06-12 | Analogic Corporation | Shielded power coupling device |
JP2016207966A (ja) * | 2015-04-28 | 2016-12-08 | 北川工業株式会社 | 磁性体コア |
JP2019520714A (ja) * | 2016-05-16 | 2019-07-18 | ボリーメディア ホールディングス カンパニー リミテッドBolymedia Holdings Co. Ltd. | 電磁誘導装置及びその製造方法 |
US20190219458A1 (en) * | 2016-08-30 | 2019-07-18 | Torque And More Gmbh | Force Measurement Device |
-
2018
- 2018-03-22 DE DE102018204366.3A patent/DE102018204366A1/de active Pending
-
2019
- 2019-03-01 WO PCT/EP2019/055145 patent/WO2019179749A1/de active Application Filing
- 2019-03-01 CN CN201980020606.2A patent/CN111886661B/zh active Active
- 2019-03-01 US US16/981,731 patent/US11817243B2/en active Active
- 2019-03-01 EP EP19708835.4A patent/EP3769323B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
US20200411222A1 (en) | 2020-12-31 |
CN111886661A (zh) | 2020-11-03 |
US11817243B2 (en) | 2023-11-14 |
WO2019179749A1 (de) | 2019-09-26 |
EP3769323B1 (de) | 2023-08-30 |
CN111886661B (zh) | 2022-10-21 |
DE102018204366A1 (de) | 2019-09-26 |
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