EP3824486A1 - Ensemble formant noyau à propriétés magnétiques pour dispositif électrique et bobine de choc pourvu d'un tel ensemble de noyau - Google Patents

Ensemble formant noyau à propriétés magnétiques pour dispositif électrique et bobine de choc pourvu d'un tel ensemble de noyau

Info

Publication number
EP3824486A1
EP3824486A1 EP19734357.7A EP19734357A EP3824486A1 EP 3824486 A1 EP3824486 A1 EP 3824486A1 EP 19734357 A EP19734357 A EP 19734357A EP 3824486 A1 EP3824486 A1 EP 3824486A1
Authority
EP
European Patent Office
Prior art keywords
ferrite
core arrangement
stack
disks
magnetic
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Withdrawn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
EP19734357.7A
Other languages
German (de)
English (en)
Inventor
Marcin Kacki
Marek Rylko
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.)
SMA Solar Technology AG
Original Assignee
SMA Solar Technology AG
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 SMA Solar Technology AG filed Critical SMA Solar Technology AG
Publication of EP3824486A1 publication Critical patent/EP3824486A1/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Withdrawn legal-status Critical Current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
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F17/062—Toroidal core with turns of coil around it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder
    • 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
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • 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

Definitions

  • the invention relates to a core arrangement with magnetic properties for an electrical device, the core arrangement comprising ferrite material and being designed and set up to conduct a magnetic flux during operation of the electrical device.
  • the invention also relates to a choke with such a core arrangement and at least one electrically conductive coil, the at least one electrically conductive coil wrapping the core arrangement at least in sections.
  • the invention further relates to an electrical device with such a device
  • Core arrangements are for example as part of chokes in electronic
  • the chokes can be, for example, chokes for smoothing a sinusoidal
  • EMC filter chokes are used for filtering
  • Interference signals that can spread in the electrical device and should not get into the environment.
  • the lowest possible losses and the highest possible magnetic conductivity A of the magnetic material are aimed for guiding the magnetic flux.
  • the simplified relationship L is for a closed circumferential core arrangement with a constant cross section A and a length l given, where m 0 is the magnetic field constant and m G is a relative permeability of the material.
  • Iron as the core material is inexpensive and has advantageously high values for m G , but also has high losses due to eddy currents due to its good electrical conductivity.
  • Ferrite as the core material also has high values for m G , but is a poor conductor compared to iron. Ferrite is a ferrimagnetic material. If core assemblies are to conduct rapidly changing magnetic fields, soft magnetic materials are used, for example, which have a narrower hysteresis curve compared to hard magnetic materials and therefore lower ones
  • Core assemblies with a correspondingly large cross-section can be designed to conduct high magnetic fluxes. This increases both the material costs and the weight of such components.
  • Inverters are chokes with a core arrangement after the
  • Inverter bridges are known, which are arranged in the power path of the systems and exposed to high magnetic fluxes. These chokes can hold a weight in
  • the invention has for its object to provide a core arrangement of the type mentioned and a choke of the type mentioned and to provide an electrical device of the type mentioned, with which a particularly low-loss conduction of a magnetic flux is made possible in at least one frequency range.
  • the object is achieved according to the invention in a core arrangement of the type mentioned at the outset in that the core arrangement comprises at least one stack with at least two ferrite disks made of ferrite material,
  • the ferrite discs each have a front and a back as sides and
  • the core arrangement being designed and set up to conduct a magnetic flux in at least one operating state of the electrical device which is parallel or essentially parallel to the ones in the region of the stack Pages runs.
  • Ferrite material can be saved in the core assembly, thereby reducing the weight of the core assembly.
  • significant results could be achieved in this way
  • Weight reductions compared to conventional EMC filter chokes with a one-piece ferrite core can be achieved. These lossy effects are not taken into account in the manufacturer's information for ferrite cores, since they are generally either not known or are generally regarded as negligible. Surprisingly, suppression or reduction of these lossy effects in ferrite material, which are either considered negligible or generally little known, leads to a significant improvement in the performance of ferrite cores by means of the inventive core arrangement.
  • Dimension of a one-piece ferrite core is greater than half the wavelength of an electromagnetic wave crossing the ferrite core. Since ferrite has a high dielectric constant and a high permeability, the
  • Wave propagation velocity in the material is lower than, for example, in air or in empty space, so that the difference in wavelength leads to a phase difference of the wave on the surface of the magnetic material.
  • the dimension effect affects the impedance of the ferrite core, which changes from inductive at low frequencies to resistive at high frequencies when the resonance is present.
  • the resonance dimension D R is a function of frequency and others
  • s r is a relative permittivity of the ferrite material, / a frequency of an electromagnetic wave, w is a product of 2p times the frequency /, m G is a relative permeability (permeability number) of the ferrite material and p is a specific electrical resistance of the ferrite material.
  • the resonance dimension D R for manganese-zinc ferrite (MnZn ferrite) and nickel-zinc ferrite (NiZn ferrite) as a function of frequency / is shown in FIG.
  • the smallest spatial dimension of the ferrite core or the ferrite disks must be less than or equal to half of D R at this frequency.
  • each one-piece ferrite core which is cut into at least two ferrite disks in the intended direction of the magnetic flux to reduce the dimensional resonance, has lower losses than the one-piece ferrite core, even if the dimensions of the ferrite disks are transverse magnetic flux are substantially greater than half of D R in the frequency range under consideration.
  • the sides of the ferrite disks of the stack which correspond to the cut surfaces in the example, lie against one another or can be arranged at a distance from one another.
  • magnetic material is defined by a permeability number greater than 1, non-magnetic material by a permeability number of 1, and diamagnetic material by a permeability number less than 1.
  • air is referred to as diamagnetic in the context of this invention, even if it is referred to as paramagnetic in the literature to some extent becomes.
  • the filling material can be used to cushion these mechanical forces.
  • an elastic filling material can be arranged between at least two of the ferrite disks of the core arrangement.
  • the second lossy effect in ferrite cores is a core skin effect (core skin effect), which is also referred to as a magnetic skin effect (flux skin effect).
  • core skin effect also referred to as a magnetic skin effect (flux skin effect).
  • the core size and frequency range of the range of application of the core arrangement have a strong influence on the distribution of the magnetic flux in the core. Due to the core skin effect, there is an uneven distribution of the magnetic flux in the core, although losses due to circulating currents in ferrite material are considered negligible.
  • the magnetic skin depth d [m] is a function of the frequency / [Hz] and depends on the specific conductivity s [S / m] of the material, the absolute permeability m 0
  • the losses caused by the magnetic skin effect in the ferrite core can be reduced by cutting the ferrite core into at least two ferrite disks in the intended direction of the magnetic flux, so that a
  • optionally existing inner area of the ferrite disks is reduced with weakened magnetic flux and circulating currents and displacement currents in the interior of the ferrite material are reduced.
  • the ferrite cores according to the invention can also be produced in another way, for example by producing the ferrite disks separately and then assembling them.
  • the core arrangement comprises at least one stack with at least two disks made of ferrite material.
  • the core arrangement can also comprise further stacks with at least two disks made of ferrite material.
  • the stack can comprise, for example, at least three or at least four disks made of ferrite material.
  • the ferrite disks can consist of different ferrite material or of the same ferrite material.
  • the same ferrite material can include different types of ferrite material.
  • Ferrite material can be soft magnetic ferrite material.
  • Advantageous embodiments of the invention are specified in the following description and the subclaims, the features of which can be used individually and in any combination with one another.
  • the stack comprises at least two ferrite disks made of the same or essentially the same ferrite material.
  • This embodiment of the invention is intended to make it clear once again that the idea according to the invention lies in the division of a ferrite core into ferrite disks. Since ferrite is a poor conductor, laminated cores can only be found in the prior art for conductive magnetic materials.
  • the at least two ferrite disks made of the same ferrite material can, for example, consist of one type of ferrite material or, for example, comprise areas with different types of ferrite material.
  • Ferrite disks of the stack are arranged spaced apart from one another, the at least one intermediate space between directly adjacent ferrite disks of the stack being filled or essentially filled
  • the at least one space between directly adjacent ferrite disks of the stack can prevent mutual damage to the two directly adjacent ferrite disks when the core arrangement is subjected to a mechanical load, for example during a winding process of electrically conductive coils around the core arrangement.
  • the choice of words "directly adjacent ferrite disks" refers to the fact that the two ferrite disks are the next successive ferrite disk in the stack.
  • at least one further disk made of a non-magnetic or diamagnetic material can be arranged between the two directly adjacent ferrite disks.
  • non-magnetic or diamagnetic material is arranged in the intermediate space.
  • the non-magnetic or diamagnetic material can fill the entire space.
  • the non-magnetic or diamagnetic material can, for example, be arranged as a disk-shaped grid between the two ferrite disks, the openings in the grid being filled with air or oil, for example.
  • the non-magnetic or diamagnetic material has the advantage that it is not Magnetic flux losses in the core assembly causes.
  • the magnetic flux is conducted in the area of the stack in the ferrite disks.
  • the non-magnetic or diamagnetic material can be, for example, cardboard, plastic, copper, polyurethane, plastic film, rubber, rubber-PET film, silicone rubber or natural rubber.
  • the space can also include combinations of these materials, for example.
  • At least two, in particular all, ferrite disks of the stack are arranged at a distance from one another, at least one of the at least one intermediate space between directly adjacent ferrite disks of the stack being subdivided into at least one central auxiliary region and on both sides
  • the magnetic material can be, for example, ferromagnetic or paramagnetic material, for example magnetic amorphous metallic alloys or magnetic nanocrystalline material or magnetic iron-nickel alloys.
  • the at least one disk made of magnetic material arranged in the auxiliary region can have a reduced thickness and, in the case of an auxiliary stack, corresponding filler material can be arranged between the disks, which has a loss-reducing effect in accordance with the properties of the magnetic material.
  • elastic material in particular polyurethane, in particular foamed polyurethane or polyurethane elastomer, is arranged.
  • This embodiment of the invention reduces the mechanical stress acting on the ferrite disks, which arises in a winding process of an electrically conductive coil around the core arrangement.
  • the mechanical stress can be reduced
  • the elastic material can be, for example, polyurethane, foamed polyurethane, polyurethane elastomer, rubber-PET film,
  • the elastic material can fill the entire space, for example.
  • exactly one spacer, in particular a disk-shaped spacer, can be formed between the at least two, in particular all, directly adjacent ferrite disks of the stack
  • the elastic material can be loosely joined to the ferrite disks and the stack by means of a casing
  • At least two, in particular all, directly adjacent ferrite disks of the stack are arranged at a distance from one another.
  • At least one spacer can be included in the core arrangement.
  • the at least one spacer can be connected to the edges of at least two ferrite disks arranged directly adjacent to one another and in particular be elastic.
  • the space between the two directly adjacent ferrite disks can be filled with a non-magnetic gaseous or liquid substance.
  • this construction cannot completely rule out contact with the ferrite disks when subjected to mechanical pressure and is less stable, it is preferable for the at least one spacer between the two ferrite disks to keep the two directly adjacent ferrite disks at a distance is arranged.
  • a further advantageous embodiment of the invention can provide that between directly adjacent ferrite disks of the stack at least one spacer is arranged which keeps the two ferrite disks at a distance and which consists of or essentially of a non-magnetic or of a diamagnetic material and in particular is elastic. It can also be considered advantageous that exactly one spacer is arranged between directly adjacent ferrite disks of the stack, the spacer in particular being disc-shaped.
  • the spacer can, for example, have a layered structure made of several materials or be made of a single material.
  • the spacer can be disc-shaped and have the same or substantially the same diameter as the ferrite disks of the stack.
  • the thickness of the spacer can be, for example, in the millimeter range and can be, for example, 0.5 mm to 4 mm.
  • the spacer can consist of an elastic material. If the ferrite disks are annular, the spacer can likewise have an annular shape, so that at least one electrically conductive coil can be wound around the stack at least in sections without being impeded by the spacers. If the stack comprises at least one intermediate space between directly adjacent ferrite disks, which has an auxiliary area with magnetic material, exactly one spacer can be arranged on both sides of the auxiliary area, which can be designed in accordance with the above statements regarding this embodiment of the invention.
  • An advantageous embodiment of the invention can provide that the ferrite disks and the spacers of the stack are arranged loosely against one another.
  • the configuration of the invention enables a subsequent insertion of further ferrite disks or spacers.
  • a fastening device is included which holds the stack together, the fastening device in particular comprising or consisting of at least one non-magnetic or diamagnetic material, the fastening device in particular encasing the
  • the core arrangement is, in particular an elastic sheathing of the core arrangement, in particular a sheathing made of polyurethane.
  • the stack comprises exactly 2 to 15 ferrite disks, in particular exactly 4 to 7 ferrite disks.
  • the core arrangement according to the invention does not require a large number of ferrite disks as in the case of laminated laminated cores. In tests, very good results in the weight reduction of the ferrite material in the core arrangement could already be achieved with 4 ferrite disks of the stack. It can also be considered advantageous that the ferrite material is ceramic ferrite material and in particular comprises manganese-zinc ferrite (Mn-Zn ferrite) and / or nickel-zinc ferrite (Ni-Zn ferrite).
  • Ceramic ferrite material is made of iron oxide (Fe 2 0 3) combined with oxides or
  • the starting material is pressed and then sintered at temperatures of 1000 - 1500 ° C. Due to the manufacturing process, ferrite cores are in a wide variety
  • the ferrite material is inexpensive compared to magnetic nanocrystalline material. Usually ferrite material is ceramic ferrite material. Ferrite material is ferrimagnetic material.
  • a further advantageous embodiment of the invention can provide that the stack comprises at least two ferrite disks made of different ferrite material.
  • the stack can comprise at least three ferrite disks made of three different ferrite materials.
  • Mn-Zn ferrite and Ni-Zn ferrite are available in different compositions, the magnetic properties of which differ among others. differ in terms of relative permeability as a function of frequency and temperature. Trade names for different ferrite materials are, for example, Mn-Zn ferrite 3E10, Mn-Zn ferrite R15K, Ni-Zn ferrite 4560.
  • the configuration of the core arrangement according to the invention enables the magnetic properties of the core arrangement to be specifically matched to the intended area of application.
  • the ferrite disks of the stack are designed and set up so that the windings of at least one electrically conductive coil can be wrapped together at least in sections.
  • the geometric shape of the ferrite disks of the stack can be, for example, rectangular, U-shaped or ring-shaped, so that the individual windings of the electrically conductive coil each lead around the stack and through
  • Applying an alternating voltage to the electrically conductive coil causes magnetic flux in the area of the stack within the ferrite disks and runs parallel or essentially parallel to the sides of the ferrite disks.
  • the shape of any spacers that may be present between the ferrite disks is such that wrapping of the stack at least in sections is made possible.
  • the core arrangement is an annular core arrangement with an axis of rotation
  • the ferrite disks of the stack are annular, with the front sides and the rear sides of the ferrite discs in the direction of the Have axis of rotation and the thicknesses of the ferrite disks extend parallel to the axis of rotation or the front and rear sides of the ferrite disks are coaxial to the axis of rotation and the thicknesses of the ferrite disks are normal to the axis of rotation.
  • the stacking of the ferrite disks in the direction of the axis of rotation also has the advantage that all components and, if appropriate, spacers can have the same geometric shape, and such a core arrangement is thus easier to manufacture.
  • the core arrangement can also comprise a plurality of stacks, so that both alternative embodiments of the invention are implemented jointly, in that stacks according to the second alternative are arranged in a stack sequence according to the first alternative.
  • the core arrangement is designed and set up to be able to be wrapped around at least in sections by at least one electrically conductive coil.
  • the core arrangement can have a sheathing over which the at least one electrically conductive coil is wound at least in sections.
  • Another object of the invention is to provide a choke of the type mentioned at the outset, with which a particularly low-loss conduction of a magnetic flux is made possible in at least one frequency range.
  • the object of the invention is achieved in a choke with a core arrangement with magnetic properties and at least one electrically conductive coil, the at least one electrically conductive coil wrapping the core arrangement at least in sections, in that the core arrangement is designed according to one of claims 1 to 16.
  • An advantageous embodiment of the choke according to the invention can provide that the choke is an EMC filter choke for an electrical device.
  • EMC filter chokes are used to suppress or reduce interference signals that spread during operation of electrical devices and can radiate to the environment.
  • Another object of the invention is to provide an electrical device of the type mentioned at the outset with which a particularly low-loss conduction of a magnetic flux is made possible in at least one frequency range.
  • the object of the invention is achieved in an electrical device with a
  • the electrical device can be an inverter with one or more
  • FIG. 1 schematically shows a choke with core arrangement and coil according to the prior art in a perspective view
  • FIG. 2 schematically shows a core arrangement according to a first exemplary embodiment of the invention in an exploded view
  • FIG. 3 schematically shows a core arrangement according to a second exemplary embodiment of the invention in a cross-sectional view
  • Fig. 4 is a diagram of the frequency response of the resonance dimension for different ferrite materials.
  • Fig. 5 is a diagram of the frequency response of the impedance of a known
  • FIG. 1 schematically shows a choke 2 designed as an EMC filter choke 1 with a core arrangement 3 and three electrically conductive coils 4, 5, 6 according to the prior art in a perspective view.
  • the core arrangement 3 consists of a one-piece, ring-shaped core 7 made of ferrite material, which is partially wound by the windings of the electrically conductive coils 4, 5, 6.
  • the EMC filter choke 1 is used for filtering high frequency components in the electrical currents flowing through the coils 4, 5, 6.
  • the coils 4, 5, 6 consist of a copper wire that is insulated.
  • the inductive resistance of the EMC filter choke 1 is frequency dependent and can be simplified as a product of
  • the EMC filter choke 1 attenuates the high frequency components of the current flowing through the coils 4, 5, 6 more strongly and acts as a filter for the lower frequency components.
  • the core 7 increases the inductance L of the choke 2 and conducts in its interior a magnetic flux 8 generated by the coils 4, 5, 6 and amplified by the core 7 in accordance with the respective current direction in the direction indicated by the double arrow.
  • FIG. 2 schematically shows a core arrangement 10 according to a first
  • the core arrangement 10 comprises a stack 11 of five ring-shaped ferrite disks 12 to 16, which are all made of the same ferrite material.
  • the ferrite disks each have a front side 18 and a rear side 19 and an edge 20 connecting the front side 18 with the rear side 19 and a thickness 21 and are arranged with mutually facing sides.
  • the ferrite disks 12 to 16 are with the
  • Spacers 22 lie loosely against one another in the stacking sequence shown
  • the core arrangement 10 is in the assembled state Can be wrapped at least in sections by an electrically conductive coil (not shown), so that when an electrical voltage is applied to the electrically conductive coil (not shown), a magnetic flux 26 is generated inside the ferrite disks 12 to 16, which is parallel to the Pages runs. Due to the construction of the core arrangement 10 according to the invention, it has low losses and a high inductance with low weight.
  • FIG. 3 schematically shows a core arrangement 30 according to a second one
  • the core assembly 30 includes a stack 32 with four annular ferrite disks 34, 35, 36, 37 made of the same ferrite material, the gaps 40, 41 between the directly adjacent ferrite disks 34 and 35 or 36 and 37 with exactly one annular spacer 42 made of polyurethane are filled out.
  • the space between the directly adjacent ferrite disks 35 and 36 is divided into an auxiliary area 43a and two sub-spaces 43b and 43c.
  • the auxiliary area 43a is filled with an annular auxiliary stack 44 which comprises annular disks 46 made of ferromagnetic material which are insulated from one another.
  • the two subspaces 43b and 43c are also filled with an annular spacer 42 made of polyurethane.
  • the ferrite disks 34 to 37, the auxiliary stack 44 and the spacers 42 are loosely placed against one another and are held together by a fastening device 48, which is a casing 50 made of polyurethane. Due to the division of the ferrite core into four ferrite disks, the core arrangement 30 has low losses, by means of the insertion of the disks 46 into the stack 32, combining the magnetic properties of the ferrite material with the ferromagnetic properties of the material of the disks 46, the savings being made by the Splitting of the ferrite core cannot be compensated by the losses in the auxiliary stack 44, since the disks 46, which are thin relative to the ferrite disks 34 to 37, are insulated from one another.
  • FIG. 5 shows a diagram which shows the measured course of the impedance in [W] for five different core arrangements over a high-frequency range from 0.01 MHz to 11 MHz.
  • the legend at the top of the diagram assigns the corresponding line characteristics in the figure to the different core arrangements.
  • the experiment compared the course of a core arrangement with a one-piece ferrite core of dimensions 80/45/30 according to the prior art, the course of core arrangements according to the invention with the same dimensions and a respective division of the core into 2, 5 or 6 ferrite disks of the same ferrite material and the course in a core arrangement according to the invention with ferrite disks made of partially different ferrite material.
  • the core arrangements according to the invention show improved performance due to the reduced losses. LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un ensemble formant noyau (10, 30) à des propriétés magnétiques destiné à un dispositif électrique. L'ensemble formant noyau de l'invention permet une conduction particulièrement à faible perte d'un flux magnétique dans au moins une gamme de fréquences. Pour cela, l'ensemble formant noyau (10, 30) comprend au moins un empilement (11, 32) pourvu d'au moins deux disques de ferrite (12 à 16, 34 à 37) en matériau ferrite. Les disques de ferrite (12 à 16, 34 à 37) comportent chacun un côté avant (18) et un côté arrière (19) comme côtés et au moins un bord (20) reliant le côté avant (18) et le côté arrière (19) et sont disposés avec des côtés dirigés l'un avec l'autre. L'ensemble formant noyau (10, 30) est conçu et adapté pour conduire, dans au moins un état de fonctionnement du dispositif électrique, un flux magnétique (8, 26) qui est parallèle ou sensiblement parallèle aux côtés dans la région de l'empilement (11, 32).
EP19734357.7A 2018-07-17 2019-06-26 Ensemble formant noyau à propriétés magnétiques pour dispositif électrique et bobine de choc pourvu d'un tel ensemble de noyau Withdrawn EP3824486A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117211.7A DE102018117211A1 (de) 2018-07-17 2018-07-17 Kernanordnung mit magnetischen Eigenschaften für eine elektrische Vorrichtung und Drossel mit einer derartigen Kernanordnung
PCT/EP2019/066946 WO2020015962A1 (fr) 2018-07-17 2019-06-26 Ensemble formant noyau à propriétés magnétiques pour dispositif électrique et bobine de choc pourvu d'un tel ensemble de noyau

Publications (1)

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EP3824486A1 true EP3824486A1 (fr) 2021-05-26

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EP19734357.7A Withdrawn EP3824486A1 (fr) 2018-07-17 2019-06-26 Ensemble formant noyau à propriétés magnétiques pour dispositif électrique et bobine de choc pourvu d'un tel ensemble de noyau

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EP (1) EP3824486A1 (fr)
DE (1) DE102018117211A1 (fr)
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EP3961660A1 (fr) * 2020-08-28 2022-03-02 Siemens Aktiengesellschaft Composant inductif pour un onduleur et onduleur

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DE102005003002A1 (de) * 2004-02-10 2005-08-25 Schaffner Emv Ag Magnetischer Ringkern und Verfahren zur Herstellung von magnetischen Ringkernen
JP2006238310A (ja) * 2005-02-28 2006-09-07 Tdk Corp Ｌｃ複合部品及びこれを用いたノイズ抑制回路
KR20100009381A (ko) * 2008-07-18 2010-01-27 주식회사 에이엠오 소음제거구조를 갖는 인덕터
JP2014096538A (ja) * 2012-11-12 2014-05-22 Kitagawa Ind Co Ltd 複合フェライトコア及び雑音電流吸収具
JP2016136592A (ja) * 2015-01-23 2016-07-28 Ｊｆｅケミカル株式会社 チョークコイル用コアおよびチョークコイル
JP2016152257A (ja) * 2015-02-16 2016-08-22 Ｎｅｃトーキン株式会社 インダクタンス素子
CN106887299A (zh) * 2015-12-16 2017-06-23 莱尔德电子材料(深圳)有限公司 包括锰锌铁氧体和镍锌铁氧体的共模扼流圈
JP6759943B2 (ja) * 2016-09-30 2020-09-23 スミダコーポレーション株式会社 リアクトルの製造方法及びリアクトル

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WO2020015962A1 (fr) 2020-01-23

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