EP2395517B1 - Induktives Bauteil mit magnetischem Kern - Google Patents

Induktives Bauteil mit magnetischem Kern Download PDF

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Publication number
EP2395517B1
EP2395517B1 EP10005932.8A EP10005932A EP2395517B1 EP 2395517 B1 EP2395517 B1 EP 2395517B1 EP 10005932 A EP10005932 A EP 10005932A EP 2395517 B1 EP2395517 B1 EP 2395517B1
Authority
EP
European Patent Office
Prior art keywords
core
housing
casting
yokes
inductive component
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.)
Active
Application number
EP10005932.8A
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German (de)
English (en)
French (fr)
Other versions
EP2395517A1 (de
Inventor
Christof Gulden
Wihlelm Krämer
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.)
Sts Spezial-Transformatoren-Stockach & Co GmbH
Original Assignee
Sts Spezial-Transformatoren-Stockach & Co 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
Application filed by Sts Spezial-Transformatoren-Stockach & Co GmbH filed Critical Sts Spezial-Transformatoren-Stockach & Co GmbH
Priority to ES10005932T priority Critical patent/ES2434719T3/es
Priority to DK10005932.8T priority patent/DK2395517T3/da
Priority to EP10005932.8A priority patent/EP2395517B1/de
Priority to PL10005932T priority patent/PL2395517T3/pl
Publication of EP2395517A1 publication Critical patent/EP2395517A1/de
Application granted granted Critical
Publication of EP2395517B1 publication Critical patent/EP2395517B1/de
Active legal-status Critical Current
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
    • 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
    • H01F17/04—Fixed inductances of the signal type with magnetic core

Definitions

  • the invention relates to an inductive component with a magnetic core, in particular chokes, transformers, transformers, transducers, and similar inductive components.
  • the bobbins of these inductive components are usually thin-walled cylinders, they carry one or more windings of a choke, a transformer or a transformer.
  • the bobbin or insulating cylinder are produced for example by injection molding or extrusion, wherein the bobbin is usually formed as a hollow cylinder, in which, for example, magnetic cores are used.
  • the wound coil body which are formed into insulating cylinders.
  • magnetic cores for chokes are, for example, formed in a columnar shape and consist of one or more core parts and core disks glued together, which are separated by so-called "air gaps", e.g. B. in the form of spacers made of insulating material, are separated from each other.
  • air gaps e.g. B. in the form of spacers made of insulating material.
  • air gap spaces also serve to mechanically interconnect individual core parts or disks, in particular to bridge the so-called air gaps with adhesive coated disks.
  • the EP 0 848 391 A1 a housing for the construction of separate by air gaps magnetic core columns for inductive components, which has an inner space bounding inner lateral surfaces on which a plurality of radially projecting into the interior ribs or fin projections are arranged.
  • the interior is subdivided by the ribs or rib projections into several juxtaposed chambers for receiving core disks or core parts of the magnetic core column.
  • the core disks or core parts are loose in the chambers and are not mechanically interconnected. This leads to non-optimal physical properties of the inductive components, such as greater electrical losses, greater electrical capacity to earth, leakage current problems and poorer heat dissipation.
  • the invention was based on the problem of designing an inductive component with magnetic cores in such a way that this component or inductor can be produced much more simply and cost-effectively, despite the multiple-part core division, than previous methods made possible.
  • the object is achieved by an inductive component having the features of claim 1 and by a method for producing such a component having the features of claim 8.
  • the central configuration for the construction of the inductive component is a housing with so-called grid half shells, or a grid bar, or grid grooves and a Rasterverguss.
  • the housing forms chambers for receiving core disks or core parts, which together form the magnetic core.
  • the chambers are either formed by the formed on the inner circumferential surfaces of the half-shells, radially projecting into the interior ribs or ribs approaches or nubs, or through in the inner wall of the half-shells trained grooves with intermediate layers.
  • the ribs or rib projections or nubs or the intermediate layers at least partially define the required air gaps between the core disks or core parts.
  • Clearlymilamilackerguss offers in many ways ways to break away from previously common coil inserts or partial-Einguss- method, with manufacturing advantages, including better physical properties of the chokes. Better properties such as, lower electrical losses, reduced electrical capacitance to earth, no leakage current issues, better heat dissipation from the windings. In addition, material and weight is saved.
  • the essence of innovation & a. is that the aforementioned minimum interior volumes are designed contiguous, are sealed to the outside, but are opened in the region of the entry of the potting compound to the atmosphere and designed with small-volume refill depots at the opening location.
  • the core columns and adhesive interstices between the outer casings and yokes are filled with potting adhesive resin, wherein the windings with their interconnections and beginnings, ends are previously pushed onto the housing.
  • the Aufglallaki between the core discs or core parts are given taking into account the tolerances of the discs / split cores by the shape of the half shells and the outer shell.
  • core disks and yokes are fixed and secured well.
  • the previously complex bonding of the core parts and yokes with each other, is eliminated.
  • the inductance value can be adjusted with adjusting screws on the outer or tub housings.
  • the inner-structure potting can also be done in two operations by core pillars are first potted or molded and subsequently outer housing with yokes in a composite inner structure compound with resin or Auf spallmassen be attached.
  • the outflow of waste heat from the windings applied to the halves of the grid is versatile and effective.
  • the air that absorbs the heat loss is usually connected to the internal air of the associated inverter or other electrical equipment. Most internal air circulations of inverters or electrical equipment absorb the low heat loss of the inductive component and transport it away.
  • the thicknesses of the ribs or rib projections or grid grooves in the grid half shells, grid bars or the grid shells are smaller than the thickness of the computed air gaps between the core disks or core parts. Therefore, the core disks or core parts lie on all sides with little play in the chambers of the half-shells. All tolerances of the discs or core parts and the half-shells are equalized before filling with low-viscosity resins without vacuum but also with higher viscosity casting compounds with vacuum with the constructive adjustment available.
  • the thickness of the ribs may be different in this type halftone shells, grid bars or Rastervergadoren, depending on the design of the component.
  • ribs or ribs projections or grooves are present, which separate the middle to outer chambers from each other, with some subsequent to the outside corrugated fins or bendable knobs for adjusting the core columns.
  • the outer housing are preferably equipped with undercut Nutklemmungen and are thus fixed non-positively with the core disks or sub-cores filled half-shells.
  • the outer housings - as mentioned - adjustment provided to be able to exert axial forces on the arranged in the grid shells core disks so that the spaces between the outer core disks or core parts compressed, or can be reset, so that the adjusted sum of the air gaps between the core disks or core parts leads precisely to the nominal inductances.
  • the hollow body has a cylindrical shape, but also cuboid or cube-shaped, the hollow body then, for example, outside cylindrical and inside rectangular d. H. may have a substantially rectangular shape.
  • the hollow body does not consist of half-shells, grid bars, but from an encapsulation housing.
  • the casting material is poured or injected in a mold around the discs or partial cores, which are fixed at predetermined intervals with pins or holding nubs were.
  • the potting compound forms in this way the housing and fills the air gaps between the core disks or core parts.
  • the outer housing are arranged separately on one piece sprayed grid columns.
  • the outer housings can be clamped on the axially divided grid shell columns.
  • the housing of the inductive component comprises so-called grid half shells, grid rails, grid casings which have at least one elongate hollow body, on the inner lateral surfaces of which a plurality of ribs, knobs or other configurations radially projecting into the interior are produced.
  • Grooves are arranged, wherein the part-inner spaces are divided by ribs, corrugated surfaces, also axially bendable knobs, or rigid and flexible intermediate layers, quasi into several to many axially juxtaposed chambers for receiving core disks and core parts.
  • the hollow body of the housing consists of two axially divided grid half-shells, each core part or core disc being characterized by at least one circularly arranged rib or knob arrangement or other configurations, e.g. Grooves, is separated from an adjacent core disk or a core part.
  • the half-shells are constructed symmetrically, d. H.
  • semicylindrical, rectangular or other shaped cavities are formed in the interior of the two halves of the half-frame in which core disks or partial cores are accommodated in the manner necessary for the respective type of inductive component.
  • An attached hollow body of z. B. two half-shells forms several or many partial grid spaces, for example, cylindrical chambers but also other geometric, z.
  • the disks or core parts are inserted into the chambers of the first half-raster half-shell and closed by the second half-raster shell. This eliminates stacking, at which, for example, core disks, disk by disk core parts, piece by piece, had to be glued on each other.
  • the hollows can be filled with low-viscosity adhesive resin.
  • standard resins are usable, if the mecanical styrene resin is evacuated.
  • a one-piece tub housing has been developed, the analogous as usual, z. B. receives two cores with windings and yokes and is completely or partially shed.
  • the tub housing preferably made of plastic, but differs from previous tub housings in that it is not made of metal, but of thin-walled plastic configurations and cavities are closely formed on the windings and yokes.
  • such housings also allow the incorporation of heat conductive metal or ceramic interfaces of a portion of the circumference of the windings to coolers or cooling surfaces of inverters.
  • FIG. 1 and 1 a, 1 b show a plan view and a section through a housing 1 with so-called grid halves 1 a, 1 b.
  • Each screen half shell 1 a, 1 b is formed in the form of a thin-walled half-cylinder and has, inter alia, a continuous axially-flat recess or channel 2, see. also FIG. 18 , Left and right of the recess / channel 2 are z.
  • the individual chambers 76 are in the longitudinal direction of the half-shells Fig. 1a, 1st b arranged one behind the other.
  • circumferential grooves 5 or segment grooves are respectively provided at the end of the half-shells 1a, 1b, the u. a. for fixing the outer housings 10, as described below:
  • FIGS. 2 to 2c show cross sections through half-shells 1a, 1b and the joining examples show Fig. 2b and 2c
  • FIG. 2 is the side view of the outside of a half-raster shell 1a, 1b mirrored.
  • the ribs / lugs 3, 3a are preferably independent of their radial height as rigid ribs or rib projections 3a Fig. 5b , or grooves Fig. 19b formed, which are connected to the inner wall of the screen half-shell 1a, b.
  • FIG. 2a shows a section through the screen half-shell 1a in the region of the rigid ribs 3.
  • the ribs 3, 4 are separated from each other by the recess or the channel 2 and preferably formed in pairs.
  • the FIG. 5c shows an isometric view of a grid half-shell with rigid ribs 3 and until shearing bendable ribs 4 or nubs 4a in Fig. 5c ,
  • the axially slightly bendable ribs or nubs 4, 4a are preferably arranged in the respective outer parts of the half-shells 1 a, 1 b.
  • the FIGS. 19b, 19d 5g and 5g show alternative embodiments of half-shells with grooves on the inner surfaces.
  • the overall lengths of the half-shells 1a and 1b are smaller than the lengths of the sequentially arranged core disks 9 plus the sum of the air gaps. Ie. the frontal, outer core disks or core parts 9 protrude slightly up to a few millimeters projection 38, 39 from the closed half-shells 1a, 1b ( FIGS. 5d, 5e ). This is required to generate a force 53, 54 Fig. 5d, 5e ) to be able to exert on the outer core disks 9 or core parts, so that the core disk distance plus / minus adjusted and thus the length of the core column can be adjusted, but on the other hand, so that on the surfaces of the outermost core disks or core parts and the yokes 17 and 40 ( Fig.
  • each half raster 1a has in its axial sides each half raster 1a a continuous frame 6 in Fig. 2b and a continuous groove 7, with which it can be connected to another cylindrical half-shell 1b constructed identically to a cylindrical housing 1.
  • FIG. 5g shows alternatively to the knob adjustment also elastic intermediate layers Fig. 5g , Pos. 78, 79, 80, in the form of a compressible but also retractable thin plate, which could be used instead of possibly in addition to bendable ribs 4 or nubs 4a, if much large adjustment strokes are to be realized, but this is not required for standard throttles is.
  • FIGS. 3 and 3a show view or a section through a half-raster shell 1 a with inserted core disks 9 as a magnetic core column.
  • the screen half-shell 1a comprises ribs 3, 4 or rib projections, nubs 4a, cf. Fig. 5 ff.
  • nubs 4a cf. Fig. 5 ff.
  • z. B in the form of core disks 9, inserted, wherein the plus-tolerance diameter of the core disks 9 are smaller than the inner diameter of two grid halves 1 a, 1 b or hinge closed half shells Fig.
  • the "thicknesses" or “heights” of the core disks 9 are slightly smaller than the minimum diameter and axial dimensions of the chambers 76, ie the distance between the ribs 3, rib projections 3a and nubs 4.
  • the effort for merging the core parts 9 is reduced to simple and short-term insertion operations of the core parts 9 into the chambers ( Fig. 3a , 3b 4, 4a ) of the half-raster shell 1a and the adhesive bonding of the second half-raster shell 1 b, and Fig. 5d, 5e considerably.
  • the chambers ( Fig. 3a , 3b 4, 4a ) of the half-raster shell 1a and the adhesive bonding of the second half-raster shell 1 b, and Fig. 5d, 5e considerably.
  • no further manual or automated operations for assembling the grid shells with core parts are necessary.
  • FIG. 4 shows z. B. the attached configuration 1 a, 1 b consisting of half-shells 1 a and 1 b.
  • the FIG. 4a shows set core column 1 with inserted core parts. 9
  • FIG. 5a to 5g show in detail cross sections of the assembly of half-shells 1 a and 1 b ( Fig. 19 et seq.).
  • Each grid half shell 1 a, 1 b comprises ribs 3 distributed on the inner circumference (FIG. Fig. 5a ) or rib projections 3a (FIG. Fig. 5b ), as well as bendable ribs 4 ( Fig. 5 ) or nubs 4a ( Fig. 5c ), which form the intermediate spaces, ie chambers 3b, for receiving the core parts 9.
  • hinge half shells Fig. 5h to Fig. 5k manufacture are connected to one of their longitudinal sides with a bending hinge 52 and can be folded together by means of this bending hinge 52.
  • a bending hinge 52 is connected to one of their longitudinal sides with a bending hinge 52 and can be folded together by means of this bending hinge 52.
  • FIGS. 6 to 6b and 27 and exploded view Fig. 28 For example, show outer housing 10, 43, which can be connected to grid half-shell core columns. These outer housing 10, 43 consist z. B. from a two-hole base plate, mounting bars and version Fig. 27 in addition from a Umrandungskragen, which for specially shaped yokes and the admission of casting resin Fig. 28 is designed.
  • the base plate of the outer housing Fig. 6 a, b , P10 includes holes 11 with undercuts 12 so that the core columns can be locked non-positively and shear-resistant on the outer housing 10, 43.
  • the openings 11 with the undercuts 12 are reduced with clamping screws 13 in their diameters by the clamping screw 13 is tightened.
  • the undercuts 12 of the holes 11 of the outer housing in Fig. 25 . 28 engage in the grooves 5 of the core columns 1 and are clamped by clamping screws 13 in the grooves 5.
  • the remaining gap Fig. 6a . 14 can with seals Fig. 6 . 15 be sealed so that the connections between the housing 1, the outer housings 10 and held on / in the outer housing yokes 17 is closed and interfere with the pouring of the cavities no leaks the potting process.
  • FIG. 9 shows a single winding 16, as it is applied to the housing 1.
  • FIG. 9a shows a plan view of a single winding. It forms between the housings 1 with core columns via the interface outer housing 10, a compound that z. B. by the automatic bonding with the structural cast, can be made even more stable.
  • the equipped with yokes 17 outer housings 10 and associated housing 1 with core columns are filled after assembly with low-viscosity filling and / or adhesive resin. This is the difference volume Fig. 29a between the interior of the half-shells 1a, b minus the sum of the volumes of the core parts 9 plus Jochklebung filled.
  • the casting compound flows through the axially sealed half shells Fig. 29a and fills from the inner yoke 40, outer housing 10 via the individual core disks 9 to the filling space between the "upper" outer housing 43 and yoke 40, where no seal is placed on.
  • the air displaced by the resin escapes from the cavities of the housings 1 with windings 16 and the adhesive and casting spaces between the outer housings 10 and yokes 17.
  • the casting compound thin-bodied casting, polyester or PU resin etc. is generally used. but also standard resins.
  • FIGS. 4, 4a 4b show how core disks 9 or core parts of a core column are inserted into the halftone half shell 1a.
  • the core disks or core parts 9 usually have a slight axial play in their respective chambers, because the ribs 3 or ribs 4 are made thinner than the intended and calculated air gap between the disks or core parts 9.
  • the second half-raster 1 b is closed via the filled with core parts 9 housing half 1 a.
  • Previously may - alternatively but not adhesive must be introduced into the groove 7 or the frame 6 of the half-shells.
  • core column strips Fig. 22-24 possible. That is, the core disks 9 or parts with, for example, three or four grid strips 69 before insertion into an injection mold Fig. 21, 23 fixed by the brackets 70 and adjusted according to the described method, also encapsulated or cast around.
  • FIG. 24
  • a choke is shown, which is designed for high volumes.
  • commercially available cuboid yokes are no longer used.
  • flow-specific shaped yokes were used " Fig. 26 designed, based different magnetic fluxes over the Jochbone.
  • z. B. is the largest dimensioned cross section in the middle of a yoke 40, because only place is the full magnetic flux.
  • All cross sections outside the center of the yoke can be reduced to half-left / right of the center or less large cross-sections. Ie. all cross sections going from the central area to the outside Fig. 26 ,
  • Numerals 65, 64, 63 are approximated to the actual magnetic fluxes. This creates space for the accommodation of terminals, contact fittings, winding bridges, and integrated foot structures of the chokes Fig. 27 . 28 ,
  • Fig. 26 receives.
  • the plane surface of the yoke for the passage of the magnetic flux is advantageously made only a little "wider" than the diameter of the core disks.
  • Fig. 26 can connect bridges Fig. 31 , Stranded leads 84 can be accommodated, which advantageously allows for minimized overall volume and molded internal insulation to the yoke.
  • up to 30% material is saved at the Jochen - at the same time better flow cross-sectional performance
  • the exploded drawing Fig. 28 shows this.
  • the drawing in the compilation Fig. 29 also shows how the volume and weight reduction of a throttle is achieved.
  • FIG. 25 shows an alternative to the previous embodiments, a complete manufacturing form, consisting of a lower part 25 and a top 26.
  • 26 can be made completely one or more parts injection-molded or cast or pressure-gelled core columns.
  • two or more retaining pins 27 are arranged in the lower part 25 of the manufacturing mold per core part.
  • the core parts 9 can thereby be fixed in the bottom part 25 exactly with a defined distance (air gap).
  • the upper part 26 of the manufacturing form has per core disk or core part 9 a fixing pin 28.
  • Three fixing pins 27, 28 for each core part 9 are sufficient to fix the entire arrangement of the core part 9 before the casting process exactly in the production form.
  • the pin assemblies can be dispensed with in a mold or mold when, for example, halftone shells 72 are used with a thin, apertured sheath.
  • the hole pattern in the shell of the half-raster shell 72 allow the unhindered entry of the spray or casting compound into the gaps between the core disks or core parts inserted in the half-rake shell, as well as the closure of the insulating cylinder part around the core disks or parts.
  • core disks or core parts 9 manufacturing forms according to the Fig. 21-24 be like the Figures 12 or 13 filled with spray or potting compound. After solidification of the spray or potting compound to obtain a thin coated core column.
  • the core disks 9 are separated from each other by tufts or disks and air gaps filled with injection molding compound. Provided at the ends, embossed mounting grooves are used for attachment to an outer housing 10th
  • FIGS. 14 to 17 Shown in housings 1, consisting of upper part and lower part, not round core parts 30, 31 are added.
  • clamping bolts 32, Fig. 14 in the claddings of the core columns Fig. 14, 15th are introduced, which can serve for the attachment of outer housings, yokes or bearing plates or flanges.
  • FIG. 16 shows configurations of such a molded or cast housing 1 in which rectangular core parts 30, 31 are arranged.
  • the core parts have different dimensions and thicknesses to best fill the cross sections of the core columns.
  • FIG. 16 a cross section of a core column, it can be seen that the total cross section of a square core member 30 and distributed on the sides, four rectangular side core parts 31 join.
  • FIG. 17 shows a staggered core configuration.
  • core parts 30, 31 are arranged, the differentiated in their dimensions -Folienumble- different and thus use the round cross-section of the housing 1 and fill.
  • the core columns of core parts 30, 31 are separated from each other by corresponding intermediate layers or rib projections, which then form the air gaps.
  • FIGS. 19c and 19d show half-shells 1 b in different views and the composite housing 1 according to FIGS. 19c and 19d ,
  • recesses / channels 2 are arranged on the inner wall as in half-shells 1a, 1b.
  • outer housing Fig. 28 can also be used as "integrated molded plastic tub casing Fig. 30 be connected to previous throttle body - made of metal - but have more production or electrical functions as previous housing.
  • the plastic tub housing Fig. 30-32 consist of quasi rectangular housing parts in the yoke area. The rectangular shapes go outside the yokes in semicircular-parallel tubs Fig. 32 e above.
  • the adaptation of the plastic housing parts to the configuration of the throttle saves potting compound and causes more mechanical stability.
  • the core columns Fig. 31 can in the core shots Fig. 32a 67, with the yokes each "behind the recordings" Fig. 32e 76 are laid. Behind or in front of the brackets are insulating and spacer bars Fig. 32a placed, which distance the Verschaltungs viten the windings on the one hand to the winding, on the other hand to the yokes, without otherwise usual insulation measures.
  • the chokes can be adjusted with the adjusting screws before casting.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
EP10005932.8A 2010-06-09 2010-06-09 Induktives Bauteil mit magnetischem Kern Active EP2395517B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES10005932T ES2434719T3 (es) 2010-06-09 2010-06-09 Componente inductivo con núcleo magnético
DK10005932.8T DK2395517T3 (da) 2010-06-09 2010-06-09 Induktiv komponent med magnetisk kerne
EP10005932.8A EP2395517B1 (de) 2010-06-09 2010-06-09 Induktives Bauteil mit magnetischem Kern
PL10005932T PL2395517T3 (pl) 2010-06-09 2010-06-09 Element indukcyjny z rdzeniem magnetycznym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10005932.8A EP2395517B1 (de) 2010-06-09 2010-06-09 Induktives Bauteil mit magnetischem Kern

Publications (2)

Publication Number Publication Date
EP2395517A1 EP2395517A1 (de) 2011-12-14
EP2395517B1 true EP2395517B1 (de) 2013-08-21

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Application Number Title Priority Date Filing Date
EP10005932.8A Active EP2395517B1 (de) 2010-06-09 2010-06-09 Induktives Bauteil mit magnetischem Kern

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EP (1) EP2395517B1 (pl)
DK (1) DK2395517T3 (pl)
ES (1) ES2434719T3 (pl)
PL (1) PL2395517T3 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2496163B (en) 2011-11-03 2015-11-11 Enecsys Ltd Transformer construction
DE102013221442B4 (de) 2013-10-22 2021-06-24 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Induktives Bauteil mit reduziertem Leerraum
DE102014108929A1 (de) 2014-06-25 2015-12-31 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Stapeleinheit für die Aufnahme von Kernplatten für ein induktives Bauelement

Family Cites Families (4)

* 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.
AU4536197A (en) * 1996-12-12 1998-06-25 J.E. Thomas Specialties Limited RF power coil or choke for separating RF and AC in a CATV or similar system
ATE497627T1 (de) 2003-07-23 2011-02-15 Sts Spezial Transformatoren Stockach Gmbh & Co Ferritkern für ein induktivitätsbauteil
US20090237193A1 (en) * 2008-03-20 2009-09-24 Timothy Craig Wedley Multi-core inductive device and method of manufacturing

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EP2395517A1 (de) 2011-12-14
PL2395517T3 (pl) 2014-01-31
ES2434719T3 (es) 2013-12-17
DK2395517T3 (da) 2013-11-25

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