EP4109476A1 - Dispositif de filtrage des interférences de mode commun et de mode différentiel - Google Patents

Dispositif de filtrage des interférences de mode commun et de mode différentiel Download PDF

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Publication number
EP4109476A1
EP4109476A1 EP22179204.7A EP22179204A EP4109476A1 EP 4109476 A1 EP4109476 A1 EP 4109476A1 EP 22179204 A EP22179204 A EP 22179204A EP 4109476 A1 EP4109476 A1 EP 4109476A1
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EP
European Patent Office
Prior art keywords
cores
core
electrical conductors
sections
section
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Pending
Application number
EP22179204.7A
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German (de)
English (en)
Inventor
Florian Geling
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Individual
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Individual
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Publication of EP4109476A1 publication Critical patent/EP4109476A1/fr
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    • 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
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • 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
    • 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
    • H01F2003/106—Magnetic circuits using combinations of different magnetic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6585—Shielding material individually surrounding or interposed between mutually spaced contacts
    • H01R13/6588—Shielding material individually surrounding or interposed between mutually spaced contacts with through openings for individual contacts

Definitions

  • the invention relates to a device for filtering common mode interference and differential mode interference.
  • electrical interference signals occur during operation.
  • the electrical interference signals can be divided into common mode interference and differential mode interference.
  • common-mode interference the English term common-mode interference is also used, and for differential-mode interference, the English term differential-mode interference is used.
  • common-mode interference and differential-mode interference are filtered using wound toroidal cores.
  • wound toroidal cores Particularly in the case of higher currents, two or more toroidal cores connected in series are provided.
  • One toroidal core is supposed to handle common-mode interference and the other toroidal core should Filter differential mode interference.
  • wound toroidal cores are complex to manufacture.
  • German patent application DE 10 2010 050 828 A1 proposes a current-compensated choke comprising a core with two windings for filtering common-mode noise and differential-mode noise.
  • the core has a complicated shape. A comparatively large amount of space remains.
  • the object of the present invention is to eliminate the disadvantages of the prior art.
  • a compact device for filtering common mode interference and differential mode interference on electrical conductors is to be specified.
  • this object is achieved by a device according to the subject matter of claim 1 and by a motor vehicle according to the subject matter of claim 15.
  • Advantageous refinements of the invention are specified in the dependent claims.
  • the device for filtering common mode interference and differential mode interference for a plurality of electrical conductors are each individually surrounded in one section by a first core.
  • the first cores are preferably designed as first ring cores.
  • the features described below for the first cores can therefore also apply to first toroidal cores.
  • the first cores are preferably closed. In this case, the first cores preferably completely surround the electrical conductors.
  • the electrical conductors and the first cores are jointly surrounded by a second core, preferably by exactly one second core.
  • the second core is preferably second Ring core designed. The features described below for the second core can therefore also apply to the second toroidal core.
  • the second core is preferably closed.
  • the second core preferably completely surrounds the electrical conductors and the first cores in this section.
  • the first cores each have a first magnetic permeability.
  • the first magnetic permeabilities of the respective first cores are preferably the same, alternatively they can differ at least in part.
  • the second core has a second magnetic permeability. The second magnetic permeability is greater than each of the first magnetic permeabilities.
  • permeabilities is used in the plural, contrary to common usage. This is intended to make it clear that each first core has a first magnetic permeability and the “first magnetic permeabilities” can differ. “First magnetic permeabilities” can therefore be understood to mean “values of the respective first magnetic permeability” or more precisely “values of the first magnetic permeability of the respective first cores”. These expressions seem too cumbersome here. Therefore, in favor of a simpler language, the term "permeabilities” is used in the plural instead.
  • Differing first magnetic permeabilities are preferably provided for asymmetrically occurring currents.
  • a first core with a lower first magnetic permeability and thus a higher saturation strength is provided where higher currents occur due to a load.
  • both common-mode interference and differential-mode interference can be filtered with the device according to the invention.
  • the first cores and the second core are arranged on the electrical conductors in a common plane.
  • the first cores and the second cores are preferably arranged in a plane transverse to the electrical conductors, in particular in alignment with one another.
  • the first cores and the second core are advantageously arranged one above the other, one could also say arranged essentially concentrically to one another. This represents a departure from the prior art, in which multiple cores are often arranged in series to filter common-mode interference and differential-mode interference.
  • the device according to the invention is particularly compact and thus enables considerable space savings. Furthermore, the device according to the invention is comparatively simple to manufacture.
  • Common-mode interference is understood to mean electromagnetic interference signals that propagate in the same direction on connecting lines. So, for example, propagate on the outgoing line and on the return line, each with the same phase position and/or current direction.
  • Push-pull interference or differential mode interference is understood to mean electromagnetic interference signals which propagate in opposite directions on connecting lines, ie propagate with different phase angles and/or current directions.
  • the electrical conductors which are designed as busbars, for example, can advantageously be led out parallel to one another, for example horizontally, out of the device or out of a component having the device. As a result, the electrical conductors can be contacted particularly easily.
  • the The device can be installed in a device in a particularly simple and particularly space-saving manner.
  • the device comprises two, three or four electrical conductors.
  • the electrical conductors preferably form a power supply line.
  • the power supply line is preferably a single-phase or three-phase power supply line.
  • two electrical conductors are provided, preferably one electrical conductor for the phase and one neutral conductor.
  • three electrical conductors can be provided, preferably one electrical conductor for each of the three phases.
  • four electrical conductors can be provided in a three-phase power supply line, preferably one electrical conductor for each of the three phases and an additional neutral conductor.
  • a single-phase and/or a three-phase power supply line should preferably be operated with alternating current.
  • the device according to the invention can also be provided for direct current.
  • the device preferably comprises two electrical conductors, that is to say preferably an electrical conductor for the current flowing in and an electrical conductor for the current flowing out.
  • the electrical conductors are busbars or current-carrying bolts.
  • the electrical conductors may each be tape, each braid, each cable, or each wire.
  • the electrical conductors can also be any combination of busbars, current-carrying bolts, straps, braiding, cables and/or wires.
  • a total of three electrical conductors can be designed as two electrical conductors as busbars and one electrical conductor as a cable.
  • the electrical conductors are preferably formed from copper and/or aluminum.
  • the electrical conductors preferably have a cross-sectional area of 10 to 1000 mm 2 , particularly preferably a cross-sectional area of 50 to 200 mm 2 .
  • the electrical conductors can be, for example, two copper rails each with a cross section of 15 mm*3 mm.
  • the electrical conductors can be two strands with a cross-sectional area of 500 mm 2 .
  • the first cores and the second core preferably surround the electrical conductors over a length of 5 to 100 mm, for example over a length of 20 mm.
  • the electrical conductors preferably run parallel or essentially parallel to one another.
  • the electrical conductors run parallel to one another at least in the section in which the first cores and the second core are arranged.
  • the electrical conductors within the device are not connected to each other.
  • the electrical conductors within the device are galvanically isolated from one another.
  • the electrical conductors are designed as busbars, preferably as copper busbars, a press-in nut can be inserted into each busbar. As a result, the busbars are particularly easy to contact.
  • the electrical conductors are designed for currents of 50 A, preferably for currents of 100 A, particularly preferably for currents in a range from 300 A to 5,000 A.
  • an electrical conductor is also suitable in particular for lower current intensities than those mentioned and can therefore be operated at lower current intensities.
  • the electrical conductor designed for currents of 50 A is also particularly suitable for currents below 50 A and can also be operated at currents below 50 A.
  • the first cores are each made from a soft magnetic material, preferably from a powder composite material.
  • the powder composite material can be an NiFe powder, iron powder, carbonyl iron powder, ferrite powder and/or FeAl powder. The latter is also known as Sendust.
  • the first cores may each be made of ferrite (e.g. manganese zinc ferrite (MnZn) or nickel zinc ferrite (NiZn)) and each have at least one air gap.
  • the first cores can each be made from nanocrystalline or amorphous core material, with the first cores preferably each having at least one air gap.
  • the second core is made of a soft-magnetic material such as ferrite (eg manganese-zinc ferrite (MnZn) or nickel-zinc ferrite (NiZn)), NiFe, SiFe, nanocrystalline or amorphous core material.
  • ferrite eg manganese-zinc ferrite (MnZn) or nickel-zinc ferrite (NiZn)
  • NiFe NiFe
  • SiFe nanocrystalline or amorphous core material
  • nanocrystalline or amorphous core material e.g., the second core can be made of powder composite material.
  • the powder composite material can be an NiFe powder, iron powder, carbonyl iron powder, ferrite powder and/or FeAl powder.
  • the first magnetic permeabilities are each in a range from 5 to 500, preferably each in a range from 10 to 100.
  • the second magnetic permeability is in a range from 500 to 150,000 , preferably in a range from 1,000 to 100,000, particularly preferably in a range from 4,000 to 50,000.
  • first magnetic permeability and the second magnetic permeability There can be a factor of 5 to 20,000 between the first magnetic permeability and the second magnetic permeability.
  • combinations of low values of the respective first magnetic permeability with high values of the second magnetic permeability or of low values of the second magnetic permeability with high values of the respective first magnetic permeability are also possible.
  • the first cores can be configured as first toroidal cores and/or the second core can be configured as a second toroidal core.
  • the cross section of the first cores each form an oval, round or rectangular area, in particular an annular area, or combinations thereof in sections.
  • the cross section of the second core forms an oval, round or rectangular area, in particular an annular area, or a combination thereof in sections.
  • the first cores are each formed in one piece or in several pieces.
  • the second core is designed in one piece or in several pieces.
  • the first cores and/or the second core are preferably pressed as a tube.
  • the first cores and/or the second core can be pushed from the front onto the electrical conductors, which are preferably designed as busbars or bolts. In this case, in particular, the entirety of the first cores and the second core can be pushed onto electrical conductors.
  • the first cores and/or the second core are preferably each slipped on around the electrical conductors, which are preferably in the form of busbars or bolts.
  • the first cores are preferably each attached individually around one of the electrical conductors.
  • the second core is then preferably fitted around the first cores surrounding the respective electrical conductors.
  • the first cores and/or the second core are preferably each formed as two U-cores, as two E-cores and/or as a combination of a U-core or E-core with an I-core.
  • the two U-cores or the combination of the U-core with the I-core are put together in such a way that an axial hole is formed in which an electrical conductor or the first cores surrounding the respective electrical conductors can be accommodated.
  • Two E-cores or the combination of an E-core with an I-core have two axial holes.
  • the formation of a first core as two E-cores or as a combination of an E-core with an I-core therefore enables two electrical conductors to be accommodated, with one electrical conductor running through each of the two holes.
  • the number of first cores can be reduced by one.
  • first core configured as two E cores or as a combination of an E core and an I core can surround the two electrical conductors.
  • first cores can be formed integrally, for example in one piece in the form of an 8 or in several pieces in the form of two E-cores.
  • the electrical conductors are each individually surrounded by a first core in this configuration as well.
  • first cores and/or the second core can be made in several pieces in the axial direction.
  • first cores and/or the second core can, for example, each be composed of a plurality of pieces pressed as tubes.
  • first cores, which each surround the electrical conductors over a length of 30 mm can be composed of three pieces each 10 mm long.
  • a second core surrounding the electrical conductors over a length of 30 mm can be composed of three pieces each 10 mm long. These pieces can be pushed from the front onto the electrical conductors, which are preferably designed as busbars or bolts.
  • first cores and/or the second core can be formed, for example, from a plurality of pairs of U cores, from a plurality of pairs of E cores, from a plurality of U-I cores and/or from a plurality of E-I cores.
  • the pairs can be fitted around the electrical conductors and/or around the first cores surrounding the respective electrical conductors.
  • the second core is configured as two U-cores, as two E-cores, as a combination of a U-core with an I-core and/or as a combination of an E- Core formed with an I core.
  • the first cores form a receptacle for the second core.
  • the receptacle can be formed by one or more indentations provided in the lateral surfaces of the first cores be.
  • the receptacle can be formed by one or more elevations provided in the lateral surfaces of the first cores. The indentation, the indentations, the elevation and/or the elevations can run in the circumferential direction of the lateral surfaces of the first cores.
  • the second core is applied to the first cores in a form-fitting manner.
  • the second core is preferably attached to the first cores in a form-fitting manner.
  • the second core is pushed onto the first cores in the axial direction.
  • the axial direction preferably runs parallel to the electrical conductors.
  • the device contains an insulating material between the first cores and the second core.
  • the first cores and/or the second core have an insulating material on a surface.
  • the insulating material preferably forms an insulating layer with a thickness of 0.1 to 2 mm, particularly preferably a thickness of 0.7 to 1.0 mm, for example 0.8 mm.
  • the first cores and/or the second core can be completely or partially covered with insulating material.
  • the first cores can each be surrounded by a shrink tube or an insulating tube, for example.
  • the shrink tubing can be formed from radiation-crosslinking polyolefin, for example.
  • the insulating tube can, for example, a Glass fabric tubing, silicone tubing, PVC tubing, or Teflon tubing.
  • the second core can be embedded in plastic, in particular in epoxy resin, polyurethane resin, acrylic resin and/or silicone.
  • the second core can be coated with one or more of these materials.
  • the second core is preferably encased in a fluidized bed layer made of plastic, in particular epoxy resin, polyurethane resin, acrylic resin and/or silicone.
  • the second core can be accommodated in a cup, preferably in a plastic cup.
  • the plastic cup can be made of PA6.6 or PVC, for example, and/or can be made by means of plastic injection moulding.
  • the second core can be placed on a pipe or hose.
  • the tube can be formed from plastic or from glass fibers impregnated with plastic, in particular with epoxy resin.
  • the tube may be made of FR4.
  • the tube can be a fabric tube, preferably a glass fabric tube.
  • the glass fabric tube can be impregnated, for example, with acrylic resin, polyurethane resin, epoxy resin, silicone and/or Teflon.
  • the insulating material may also include resin-impregnated paper (e.g. Nomex), resin-impregnated cardboard, glass and/or tar.
  • the first cores can remain without additional insulating material if there is a sufficient distance from one another.
  • the first cores and the second core can be cast and/or encapsulated together with an insulating material.
  • the first cores and the second core can be cast together, for example with silicone, PUR or epoxy resin, and/or overmoulded with plastic, for example PVC.
  • These are the first cores and the second core is preferably fixed to one another during casting, overmolding and/or curing.
  • the encapsulation is carried out, for example, by means of mold encapsulation.
  • a groove can be introduced into the insulating material surrounding the second core, preferably into the plastic cup accommodating the second core, with which a circuit board can be fixed in a defined manner.
  • the circuit board preferably houses a capacitor assembly.
  • the connection between the printed circuit board and the electrical conductors, preferably the busbars, particularly preferably the copper bars, can be made with low inductance by means of additional bolts, additional copper bars, additional copper strips or additional copper braids. This enables a defined, precisely positioned and reproducible assembly. This is particularly advantageous in the case of interference frequencies in the MHz range.
  • the electrical conductors are each individually surrounded by a first core in a further section or in a plurality of further sections.
  • the first cores are preferably designed as first ring cores. The features described below for the first cores can therefore also apply to first toroidal cores.
  • the first cores are preferably closed. In this case, the first cores preferably completely surround the electrical conductors.
  • the electrical conductors and the first cores are surrounded in one further section by a second core, preferably by exactly one second core, or in each of the several further sections by a second core, preferably by exactly one second core. surround.
  • the second core and/or the second cores are preferably each configured as a second toroidal core.
  • the features described below for the second core and/or the second cores can therefore also apply to the second toroidal core and/or the second toroidal cores.
  • the second core and/or the second cores are preferably each closed.
  • the electrical conductors and the first cores are preferably completely surrounded in one further section by a second core, preferably by exactly one second core, or in each of the several further sections are preferably completely surrounded by a second core each, preferably by exactly one each second core, surrounded.
  • the first cores also each have a first magnetic permeability in the further section or in the plurality of further sections.
  • the first magnetic permeabilities of the respective first cores in the respective sections are preferably the same, but can alternatively differ at least in part.
  • the second core and/or the second cores each have a second magnetic permeability.
  • the second magnetic permeability in each section is preferably greater than each of the first magnetic permeabilities in the same section.
  • each of the second magnetic permeabilities of the entire device is greater than each of the first magnetic permeabilities.
  • the device can therefore be configured in one or more stages.
  • the device is preferably configured in one stage, in two stages, in three stages or in multiple stages.
  • first cores and a second core are provided in only one section.
  • first cores and a second core are provided in two sections.
  • first cores and a second core are provided in three sections.
  • three-stage Configuration are each provided first cores and a second core in three sections.
  • the two or three or more sections on the electrical conductors are arranged one behind the other or in series with one another.
  • a capacitor assembly for example, can be provided between two such sections.
  • a capacitor assembly is provided between two consecutive sections.
  • a capacitor assembly can be provided between successive sections.
  • the capacitor assembly expands the device into a so-called passive L/C filter.
  • the filter effect of the device can be further improved via the capacitor assembly; the edge steepness of the interference signals can preferably be improved by the filter.
  • the capacitor assembly preferably comprises one capacitor to ten capacitors, particularly preferably two or three capacitors.
  • the capacitors can be arranged as X-capacitors between two electrical conductors, preferably between two phases.
  • the capacitors can be connected with a first side to the respective electrical conductor, preferably to the respective phase, and be interconnected with a second side to form a star point.
  • several capacitors can be connected in parallel.
  • the capacitor assembly is preferably accommodated on a printed circuit board.
  • the printed circuit board is preferably fixed in a defined manner on the second cores provided in two consecutive sections.
  • the two second cores involved preferably each have a receptacle.
  • the circuit board shows preferably two holding devices, one holding device corresponding to one receptacle.
  • the receptacle is preferably provided in each case in the insulating material surrounding the second core, particularly preferably in each case in the plastic cup accommodating the second core.
  • the receptacle is preferably designed as a groove.
  • the holding device can in each case be designed as a spring which engages in the groove.
  • connection between the printed circuit board and the electrical conductors, preferably the busbars, particularly preferably the copper bars, can be made with low inductance by means of additional bolts, additional copper bars, additional copper strips or additional copper braids. This enables a defined, precisely positioned and reproducible assembly. This is particularly advantageous in the case of interference frequencies in the MHz range.
  • the device can include such a printed circuit board with a capacitor assembly or a plurality of such printed circuit boards, each with a capacitor assembly.
  • a printed circuit board with a capacitor assembly can be provided between each pair of consecutive sections.
  • the second cores preferably each have two receptacles in order to be able to accommodate both a circuit board connecting to the preceding section and a circuit board connecting to the following section.
  • first and/or second cores in the further section or in the plurality of further sections preferably each have one or more of the features discussed generally above. Individual first cores may differ or be the same in these features. The respective second cores can differ in these features or be the same.
  • the first magnetic permeabilities of first cores assigned to one of the electrical conductors in different sections are the same or they differ.
  • the second magnetic permeabilities of second cores provided in different sections are the same or different.
  • At least one of the first cores assigned to one of the electrical conductors in different sections can have a different first magnetic permeability, while the first magnetic permeabilities of the remaining first cores assigned to one of the electrical conductors in different sections correspond in each case.
  • at least one of the second cores provided in different sections can have a different second magnetic permeability, while the second magnetic permeabilities of the remaining second cores correspond to each other.
  • a motor vehicle which includes an electric traction motor and a traction battery as well as a power converter or inverter and a device according to the invention.
  • the traction battery can be rechargeable.
  • the electrical conductors connect the traction motor to the power converter or inverter and this in turn to the traction battery.
  • the motor vehicle is preferably a passenger car, in particular an electric car, a truck, a bus, a ship, a submarine, a diesel-electric locomotive or a construction machine, in particular an excavator.
  • a ship's propulsion system or a plurality of ship's propulsion systems can comprise the device according to the invention.
  • the device comprises two electrical conductors 1.
  • the electrical conductors 1 are designed as copper busbars. More precisely, a section of the two electrical conductors 1 is shown. In this section, each of the two electrical conductors 1 is connected to a first one core 2 surrounded.
  • the two electrical conductors 1 and the two first cores 2 are surrounded by a second core 3 in this section.
  • the two first cores 2 are the same in this exemplary embodiment and each have an identical first magnetic permeability.
  • the first magnetic permeability is 50, for example.
  • the second core 3 has a second magnetic permeability.
  • the second magnetic permeability is 20,000, for example. According to the invention, the second magnetic permeability is therefore greater than the first magnetic permeability.
  • the second core 3 is accommodated in a plastic cup 4 .
  • the plastic cup 4 is produced from PA6.6 by means of plastic injection molding.
  • the plastic cup 4 forms an insulating layer with a thickness of 1.0 mm as insulating material.
  • the second core 3 is electrically insulated from the first cores 2 and the electrical conductors 1 by the plastic cup 4 .
  • the second cores 2 are at a sufficiently large distance from one another. An additional insulating material was therefore dispensed with in the first cores 2 in this exemplary embodiment.
  • the first cores 2 are therefore each at potential with the respective electrical conductor 1.
  • the device comprises three electrical conductors 1.
  • the electrical conductors 1 are designed as copper busbars. More precisely, a section of the three electrical conductors 1 is shown.
  • Each of the three electrical conductors 1 is surrounded by a first core 2 in this section.
  • the three electrical conductors 1 and the three first cores 2 are surrounded by a second core 3 in this section.
  • the first cores 2 are each the same in this exemplary embodiment and each have an identical first core magnetic permeability.
  • the first magnetic permeability is 50, for example.
  • the second core 3 has a second magnetic permeability.
  • the second magnetic permeability is 20,000, for example. According to the invention, the second magnetic permeability is therefore greater than the first magnetic permeability.
  • the second core 3 is encased in a fluidized-bed sinter layer 5 made of epoxy resin.
  • the fluidized bed layer 5 forms an insulating layer with a thickness in a range from 0.8 mm to 1.2 mm.
  • the second core 3 is electrically insulated from the first cores 2 and the electrical conductors 1 by the fluidized bed sinter layer 5 .
  • the second cores 2 are at a sufficiently large distance from one another. An additional insulating material was therefore dispensed with in the first cores 2 .
  • the first cores 2 are therefore each at potential with the respective electrical conductor 1.
  • the first cores 2 and the second core 3 are advantageously arranged essentially concentrically with one another.
  • the device according to the invention is therefore particularly compact. This enables considerable space savings. Furthermore, the device according to the invention is comparatively simple to manufacture.
  • the third device according to the invention comprises three electrical conductors 1.
  • the electrical conductors 1 are designed as copper busbars.
  • the third device according to the invention comprises a first section 6 and a second Section 7. In each of the two sections 6, 7, each of the three electrical conductors 1 is surrounded by a first core 2, respectively.
  • the three electrical conductors 1 and the three first cores 2 are surrounded by a second core 3 in each of the two sections.
  • the first cores 2 are each the same and each have an identical first magnetic permeability.
  • the first magnetic permeability is 50, for example.
  • the two second cores 3 are also identical in this exemplary embodiment and each have an identical second magnetic permeability.
  • the second magnetic permeability is 20,000, for example. According to the invention, the second magnetic permeability is therefore greater than the first magnetic permeability.
  • the second cores 3 are each accommodated in a plastic cup 4 .
  • the plastic cup 4 is produced from PA6.6 by means of plastic injection molding and, as the insulating material, forms an insulating layer with a thickness of 1.0 mm.
  • a groove (not shown) is made in each of the plastic cups 4 .
  • a printed circuit board 8 is fixed in a defined manner between the first section 6 and the second section 7 with the aid of the respective groove.
  • the printed circuit board 8 has a tongue (not shown) that engages in the corresponding groove.
  • the circuit board 8 preferably accommodates a capacitor assembly with three capacitors 9 . In this case, for example, a capacitor 9 is connected between each two of the three electrical conductors 1 .
  • connection between the printed circuit board 8 and the electrical conductors 1 is made with low inductance by means of three bolts 10.
  • Each of the three electrical conductors 1 is connected to the printed circuit board 8 by a bolt 10 each.
  • the third device according to the invention advantageously provides a defined, precisely positioned and reproducible assembly of the capacitors 9 . This is particularly advantageous in the case of interference frequencies in the MHz range.

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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)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
EP22179204.7A 2021-06-18 2022-06-15 Dispositif de filtrage des interférences de mode commun et de mode différentiel Pending EP4109476A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021115895.8A DE102021115895A1 (de) 2021-06-18 2021-06-18 Vorrichtung zum Filtern von Gleichtaktstörungen und von Gegentaktstörungen

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Publication Number Publication Date
EP4109476A1 true EP4109476A1 (fr) 2022-12-28

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EP (1) EP4109476A1 (fr)
DE (1) DE102021115895A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116936236A (zh) * 2023-06-29 2023-10-24 上海正泰电源系统有限公司 一种改善直流电弧检测精度的检测互感器及方法
WO2024052222A1 (fr) * 2022-09-05 2024-03-14 Magnetec Gmbh Ensemble sensible au champ magnétique, composant inductif, carte de circuit imprimé comprenant un composant inductif et utilisation d'un ensemble sensible au champ magnétique

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