Filter arrangement, power electronics device having a filter arrangement
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-08-13
Smart Images
Figure DE2026100097_13082026_PF_FP_ABST
Abstract
Description
[0001] 202400723
[0002] 1
[0003] Description
[0004] Filter arrangement, power electronics device with a filter arrangement
[0005] The present invention relates to a filter arrangement for reducing conducted electromagnetic interference and a power electronics device, such as a power inverter, a charging device (onboard charger) or a voltage converter, e.g.
[0006] DC-DC converter, specifically for an electric drive of a vehicle, with a filter arrangement as described.
[0007] Filter assemblies (EMC filters) are used in many electrical systems, especially in electrically powered vehicles, to reduce conducted electromagnetic interference in the systems, particularly at power connections, to permissible levels. These filter assemblies are typically positioned at the high-voltage connections of these systems.
[0008] As is common with technical systems, there is also a general requirement for such filter arrangements to make them more efficient and compact.
[0009] The object of the present invention is therefore to make a filter arrangement more efficient and compact.
[0010] This problem is solved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.
[0011] According to a first aspect of the invention, a filter arrangement is provided.
[0012] The filter arrangement includes at least one heat sink for cooling the filter arrangement, which extends (essentially) along a longitudinal direction.
[0013] The filter arrangement further comprises at least two conductors for conveying currents that extend at least partially in the longitudinal direction of the at least one heat sink.
[0014] The filter arrangement also has at least one magnetic core, in particular a ferrite core or a nanocrystalline core or a core with a comparable magnetic property, which is thermally contacted with the at least one heat sink, and202400723
[0015] 2
[0016] comprising a main section encompassing at least one heat sink and at least two conductors transversely to the longitudinal direction, and at least two leg sections, wherein the at least two leg sections extend transversely to the longitudinal direction in the direction of the at least one heat sink, and in particular towards the center of a space enclosed by the main section.
[0017] The main section of the at least one magnetic core forms a common-mode filter of the filter arrangement. Furthermore, each of the at least two leg sections of the at least one magnetic core, together with a portion of the main section, forms a differential-mode filter of the filter arrangement.
[0018] The above design of the magnetic core with the main section encompassing the current conductors and the leg sections extending towards the center of the space enclosed by the main section makes it possible to create a filter arrangement with both a differential mode filter and a common mode filter using one and the same magnetic core.
[0019] The surrounding design of the magnetic core around the heat sink and the conductors allows for a high degree of integration of these components, resulting in a compact filter assembly. Furthermore, the heat sink, whose primary function is to cool the filter assembly, is assigned a secondary function: supporting and holding together the components of the filter assembly, namely the conductors and the magnetic core. This eliminates the need for a separate support structure solely for supporting and holding the filter assembly components. This, in turn, enables a compact filter assembly design.
[0020] The surrounding arrangement of the magnetic core around the heat sink and the conductors facilitates heat transfer from the magnetic core and conductors to the heat sink, thus enabling efficient cooling of the filter assembly. Critical heat input from the filter assembly's heat sources into adjacent heat-sensitive components is avoided, thereby simplifying or even eliminating the need for cooling these components.
[0021] This creates a way to design a filter assembly and an electrical device with a filter assembly more efficiently and compactly. 202400723
[0022] 3
[0023] The at least two leg sections can be formed in such a way that they each extend at least partially between the at least one cooling sink on the one hand and each of the at least two electrical conductors on the other.
[0024] In particular, the at least two leg sections can be formed in such a way that each of the at least two leg sections, together with the respective corresponding part of the main section, at least partially, in particular completely, surrounds the respective corresponding conductor.
[0025] For example, the at least two conductors comprise three or more conductors arranged around the at least one heat sink, in particular spaced equally apart from one another, and extending at least partially in the longitudinal direction. In this case, the at least one magnetic core surrounds the three or more conductors transversely to the longitudinal direction. Furthermore, the at least one magnetic core can have three or more leg sections extending transversely to the longitudinal direction and each extending at least partially between the at least one heat sink and one of the three or more conductors. Each of the three or more conductors, together with a portion of the main section, forms one of three or more differential mode filters of the filter arrangement.
[0026] The at least one magnetic core can consist of several magnetic bodies that together surround the at least one heat sink and the at least two conductors. In this case, each of the several magnetic bodies of the at least one magnetic core is adjacent to the at least one heat sink and the at least two conductors. In particular, the magnetic bodies are formed as ferrite bodies, nanocrystalline bodies, or bodies made of a comparable magnetic material.
[0027] The at least one magnetic core can comprise two magnetic bodies, each in the shape of an "E" with two central crossbars instead of a single central crossbar, wherein the magnetic bodies are arranged symmetrically to each other along an axis, the axis extending perpendicular to the longitudinal direction and through the at least one heat sink, and in particular also through the at least two current conductors. In other words, the two magnetic bodies essentially have the shape of a "€".
[0028] Alternatively, the at least one magnetic core can have two magnetic bodies, each in the shape of an "F", with the magnetic bodies aligned with each other at a point of symmetry.
[0029] 4
[0030] are arranged in a mirrored (point-symmetric) manner, with the point of symmetry located in the area of the at least one heat sink.
[0031] The at least one leg section can have (at least) one interruption (or an air gap in the magnetic circuit of the magnetic core) that extends from the at least one heat sink to the at least one current conductor and in particular cuts through the at least one leg section.
[0032] The at least one cooling element may have a cooling channel for conveying a coolant, which extends at least partially in the longitudinal direction.
[0033] The at least one heat sink can have a curved shape in its longitudinal direction.
[0034] The filter arrangement can also have several conductors, such as three, for carrying multiple currents, e.g., three phase currents. These conductors are arranged around the heat sink, and in particular, are spaced equally apart from one another. Together with the heat sink, they are enclosed by the magnetic core transversely to the longitudinal direction of the heat sink. In this case, the magnetic core can have several inner leg sections, each extending transversely to the longitudinal direction of the heat sink between the heat sink and each of the conductors.
[0035] The filter arrangement can further comprise at least one sheathing made of an electrically insulating and simultaneously thermally conductive material, which encases the at least one conductor and connects the at least one conductor to the at least one magnetic core in a thermally conductive and electrically insulating manner. The sheathing is directly adjacent to the magnetic core and serves as a heat conductor between the conductor and the magnetic core.
[0036] The at least one casing and at least one part of the at least one heat sink can be formed in one piece. In particular, the at least one casing and the at least one part of the at least one heat sink can be made of the same electrically insulating and simultaneously thermally conductive material.
[0037] The at least one casing and the at least one heat sink can be integrally connected to each other by means of at least one connecting web section. 202400723
[0038] 5
[0039] be, which extends from the at least one sheathing (at least partially) through the at least one interruption to the at least one heat sink and integrally connects the at least one sheathing to the at least one heat sink.
[0040] The heat sink, together with the connecting bridge section and the casing, forms a carrier that supports and holds together the magnetic core and the current conductor.
[0041] In the case that the arrangement has two conductors, the two conductors are preferably arranged distributed on two sides of the at least one cooling channel facing away from each other, viewed in the longitudinal direction.
[0042] In the case that the arrangement has three or more conductors, the conductors are preferably arranged at equal intervals around the at least one cooling channel when viewed in the longitudinal direction.
[0043] The electrical conductors can be formed, for example, by stamping and bending a metal sheet, especially a copper sheet.
[0044] The at least one heat sink can have a cooling channel for conveying a coolant, which extends at least partially in the longitudinal direction. The cooling channel can be formed as a cavity within the heat sink, extending in the longitudinal direction of the heat sink. Alternatively, the heat sink can have a cooling tube for conveying the coolant, which is embedded within the heat sink and extends in the longitudinal direction of the heat sink.
[0045] The at least one heat sink can be formed from a molding compound, a potting compound or an injection molding compound (in one piece), which is molded, cast or overmolded around the at least one electrical conductor and the at least one cooling channel.
[0046] Alternatively, the at least one heat sink can be formed from one or more preformed body elements, in particular from one or more preformed milling body elements, which are mounted around the at least one electrical conductor and the at least one cooling channel and together form the at least one heat sink.
[0047] The filter arrangement can also have an inlet for letting the coolant into the cooling channel of the cooling element and an outlet for letting the coolant out of the 202400723
[0048] 6
[0049] The heat sink must have a cooling channel. The inlet and / or outlet may be at least partially embedded in the heat sink.
[0050] The filter assembly may further include a cooling pipe for conveying the coolant, which is at least partially embedded in the cooling element and thus extends at least partially in the longitudinal direction. In this case, the aforementioned cooling channel is formed within the cooling pipe.
[0051] The cooling element can be formed from a molding compound or a potting compound that is molded or cast around the cooling channel or cooling pipe and, if necessary, also around the inlet and outlet.
[0052] According to a second aspect of the invention, a power electronics device, in particular a (power) inverter, a (vehicle-side) charging device, a (vehicle-side) power distributor, a battery device or a voltage converter, specifically a DC-DC converter, is provided.
[0053] The power electronics device comprises at least one filter arrangement as previously described and at least one power electronics module with at least two power connections, wherein the at least one filter arrangement is electrically connected to the at least two power connections of the at least one power electronics module via the at least two current conductors.
[0054] If the power electronics device is an inverter, it can have a filter arrangement with three or more conductors, which, as described above, are all arranged around the heat sink and, in particular, spaced equally apart from one another. In this case, the three or more conductors form three or more phase output conductors of the inverter, with the filter arrangement, including the three or more conductors, being connected to the phase output of the inverter to an electrical machine, e.g., a separately excited or permanent magnet machine, and electrically connecting the inverter to the electrical machine on the phase output side.
[0055] If the filter assembly has two conductors, it can be connected to a DC terminal of an inverter, DC-DC converter, power distributor, or battery device, with each conductor forming an H+ and an H- terminal of the respective device.
[0056] 7
[0057] Brief description of the drawings:
[0058] Exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawings. These show:
[0059] Figure 1 shows a schematic perspective view of a section of a filter arrangement according to a first embodiment of the invention;
[0060] Figure 2 shows a schematic side view of a section of the filter arrangement shown in Figure 1;
[0061] Figure 3 shows a schematic cross-sectional view of a magnetic core of the filter arrangement shown in Figure 1;
[0062] Figure 4 shows a second schematic cross-sectional view of a further magnetic core according to a second embodiment of the invention;
[0063] Figure 5 shows a third schematic cross-sectional view of a further magnetic core according to a third embodiment of the invention;
[0064] Figure 6 shows a fourth schematic cross-sectional view of a further magnetic core according to a fourth embodiment of the invention; and
[0065] Figure 7 shows a fifth schematic cross-sectional view of a further magnetic core according to a fifth embodiment of the invention.
[0066] Detailed description of the drawings:
[0067] Figures 1 and 2 each show, in a schematic perspective view and a schematic side view view respectively, a section of a filter arrangement FA according to an embodiment of the invention.
[0068] The filter assembly FA includes a heat sink KK for cooling the filter assembly FA, which extends in a longitudinal direction LR. The filter assembly FA also includes a cooling pipe KR with a cooling channel KN for conveying a coolant, which is embedded in the heat sink KK and extends along the longitudinal direction LR of the heat sink KK. 202400723
[0069] 8
[0070] The filter arrangement FA also has an inlet EL for letting the coolant into the cooling channel KN and an outlet AL for letting the coolant out of the cooling channel KN, each of which is located at one of two opposite ends of the cooling tube KR and is partially embedded in the cooling body KK.
[0071] As an alternative to the aforementioned cooling tube KR, which is formed as a separate component and embedded in the cooling sink KK, the cooling sink KK itself can be shaped such that it has an elongated cavity extending along the longitudinal direction LR, forming a cooling channel for the flow of coolant. In this case, the cooling sink KK also forms the channel wall of the cooling channel. Similarly, the cooling sink KK can have sections formed at both ends of the cooling channel within the cooling sink KK, each forming the inlet and outlet of the cooling channel.
[0072] The filter arrangement FA also features a first SL1 and a second SL2 busbar for conducting currents, e.g., a positive and a negative current, which extend essentially (or except for their respective end sections) in the longitudinal direction LR of the heat sink KK and thus parallel to each other and to the heat sink KK. The two busbars SL1 and SL2, or rather their respective sections extending parallel to each other and to the heat sink KK, are distributed along the longitudinal direction LR on both opposite sides of the heat sink KK, as illustrated in Figure 2. The two busbars SL1 and SL2 are, for example, formed from a copper sheet as stamped and bent parts.
[0073] The filter arrangement FA further comprises a first FK1 and a second FK2 magnetic core, which are made of ferrite materials or nanocrystalline materials and are arranged one behind the other in the longitudinal direction LR.
[0074] The two magnetic cores FK1 and FK2 each have two magnetic bodies (e.g.
[0075] Ferrite bodies or nanocrystalline bodies) DE (see also Figure 3), each essentially in the shape of a “€” or an “E” with two middle crossbars instead of a single middle crossbar. The two magnetic bodies DE are mounted mirror images of each other around an axis around the heat sink KK and the two conductors SL1, SL2, with the axis extending perpendicular to the longitudinal direction LR and through the heat sink KK and the two conductors SL1, SL2. In other words, the two magnetic bodies DE of the respective 202400723
[0076] 9
[0077] Magnetic cores FK1 and FK2 are mounted horizontally mirrored around the heat sink KK and the two conductors SL1 and SL2. Accordingly, the two magnetic bodies DE of the respective magnetic cores FK1 and FK2 encircle the heat sink KK and the two conductors SL1 and SL2 perpendicular to the longitudinal direction LR of the heat sink KK.
[0078] The two magnetic cores FK1, FK2 each have two inner leg sections SA1, SA2, or two inner webs, which extend transversely to the longitudinal direction LR and, respectively, between the heat sink KK and the first conductor SL1 and between the heat sink KK and the second conductor SL2. The two inner leg sections SA1, SA2 correspond to the two middle crossbars of the previously mentioned "€" shape of the two magnetic cores DE. Analogous to the two conductors SL1, SL2, the two leg sections SA1, SA2 are distributed along the longitudinal direction LR on the two opposite sides of the heat sink KK, as illustrated in Figure 2.
[0079] As illustrated in Figures 2 and 3, a main section HA of the respective magnetic core FK1 or FK2, comprising two outer leg sections or two outer webs corresponding to the two outer crossbars of the previously mentioned "€" shape of the two magnetic bodies DE, as well as a connecting section linking all these leg sections of the respective magnetic bodies DE of the respective magnetic core FK1, FK2, together completely encloses the heat sink KK and the two current conductors SL1, SL2. This main section HA of the respective magnetic core FK1, FK2 forms the common-mode filter CM of the filter arrangement FA, while the two inner, usually somewhat shorter leg sections SA1, SA2, each together with the respective corresponding outer leg section and the respective corresponding subsections of the respective connecting sections, each form one of two differential-mode filters DM1, DM2.The common-mode filter CM and the two differential-mode filters DM1, DM2 are illustrated in Figure 3 with one long dashed line and one of two short dashed lines, respectively.
[0080] The heat sink KK extends through a space between the two inner leg sections SA1, SA2, while each of the two current conductors SL1, SL2 extends through a space formed between one of the two inner leg sections SA1, SA2 and one of the two corresponding outer leg sections.
[0081] The two magnetic cores FK1 and FK2 are thermally connected to the heat sink KK and the two electrical conductors SL1 and SL2. 202400723
[0082] 10
[0083] The two inner leg sections SA1, SA2 of the respective magnetic cores FK1, FK2 each have an interruption in the form of an air gap SP1, SP2 (or air gap in the magnetic circuit of the respective magnetic cores FK1, FK2) to reduce, avoid or delay core saturation in the magnetic cores FK1, FK2, which extend from the heat sink KK to the first or second current conductor SL1, SL2.
[0084] The filter assembly FA further comprises a sheath UM1, UM2 for the first and second conductors SL1, SL2, respectively. These sheaths are made of an electrically insulating and thermally conductive material and enclose the respective conductors SL1, SL2. The sheaths UM1, UM2 abut the magnetic cores FK1, FK2, specifically their respective leg sections SA1, SA2, and are thus thermally connected to the magnetic cores FK1, FK2. Therefore, in addition to electrical insulation, the sheaths UM1, UM2 also serve to transfer heat between the respective conductors SL1, SL2 on the one hand and the magnetic cores FK1, FK2 on the other.
[0085] Preferably, the casings UM1 and UM2 are made of the same material as the heat sink KK and are formed integrally with each other and with the heat sink KK. In particular, the casings UM1 and UM2 each have connecting web sections ST1 and ST2 that extend from the respective casings UM1 and UM2 through the respective air gaps SP1 and SP2 of the respective leg sections SA1 and SA2 of the respective magnetic cores FK1 and FK2 to the heat sink KK and are integrally connected to it.
[0086] For example, the sheaths UM1, UM2 together with the connecting web sections ST1, ST2 and the heat sink KK are formed in one piece from the same electrically insulating and at the same time thermally conductive injection molding compound by overmolding around the two conductors SL1, SL2 and around the cooling tube KR, which are positioned relative to each other beforehand.
[0087] After hardening, the injection molding compound forms a one-piece composite consisting of the cooling element KK and the casings UM1, UM2 together with the connecting web sections ST 1 , ST2, which serves not only to cool the filter arrangement FA but also as a support for the filter arrangement FA.
[0088] The filter arrangement FA forms, for example, part of a power electronics device, in particular a power inverter or a DC-DC converter or a power distributor or a battery device, and is connected to a DC input or a DC output of the power electronics device, wherein the two current conductors SL1, SL2202400723
[0089] 11
[0090] The filter arrangement FA establishes the electrical connection of the device and filters electromagnetic interference in the current flowing through this connection. The filter arrangement FA may further comprise a capacitor arrangement, in particular Cx and Cy capacitors, which are electrically connected to the two current conductors SL1 and SL2 of the filter arrangement FA via their current terminals.
[0091] Figure 4 shows a second schematic cross-sectional view of a further magnetic core according to a second embodiment of the invention.
[0092] The magnetic core FK1 or FK2 shown in Figure 4 differs from the previously described magnetic core from Figures 1 to 3 in that it consists of two "F"-shaped magnetic bodies GF instead of two "€"-shaped magnetic bodies. The two magnetic bodies GF are arranged as mirror images of each other at a point of symmetry, which is located at the axial center of the heat sink KK. The respective outer transverse line of the two magnetic bodies GF and the respective perpendicular line of the two magnetic bodies GF together form the main section HA of the magnetic core FK1 / FK2, which surrounds the heat sink KK including the cooling channel KN and the two current conductors SL1, SL2, and also forms the common-mode filter CM of the filter arrangement FA.The shorter middle crossbar of each of the two magnetic bodies GF forms one of two leg segments SA1, SA2, which, together with the corresponding outer crossbar and the corresponding sub-segment of the vertical line of each magnetic body GF, form one of two differential mode filters DM1, DM2. The common-mode filter CM and the two differential mode filters DM1, DM2 are illustrated in Figure 4 by a long dashed line and one of two short dashed lines, respectively.
[0093] Figure 5 shows a third schematic cross-sectional view of a further magnetic core according to a third embodiment of the invention.
[0094] The magnetic core FK1 or FK2 shown in Figure 5 differs from the previously described magnetic core from Figures 1 to 3 in that, instead of two "€"-shaped magnetic bodies, it consists of four "F"-shaped (small) magnetic bodies KF (one of the magnetic bodies KF is illustrated with a dotted line in the figure). The four magnetic bodies KF are arranged in such a way that they are mirror images of each other, forming the same shape as the magnetic core shown in Figures 1 to 3. The outermost transverse line and the vertical line of each of the four magnetic bodies KF together form the main section HA of the magnetic core FK1 / FK2, which surrounds the heat sink KK, the cooling channel KN, and the two conductors SL1 and SL2.
[0095] 12
[0096] This also forms the common-mode filter CM of the filter arrangement FA. The respective shorter transverse lines of each of the four magnetic bodies KF each form one of two leg sections SA1, SA2 of the magnetic core FK1 or FK2, which, together with the respective corresponding outer transverse lines and the respective corresponding subsections of the respective vertical lines of the respective magnetic bodies KF, each form one of two differential-mode filters DM1, DM2. The common-mode filter CM and the two differential-mode filters DM1, DM2 are illustrated in Figure 5 by a long dashed line and one of two short dashed lines, respectively.
[0097] Figure 6 shows a fourth schematic cross-sectional view of a further magnetic core according to a fourth embodiment of the invention.
[0098] The magnetic core FK1 or FK2 shown in Figure 6 differs from the previously described magnetic core from Figures 1 to 3 in that, instead of two €-shaped magnetic bodies, it consists of one €-shaped magnetic body DE and one L-shaped magnetic body IF. The two magnetic bodies DE and IF are arranged relative to each other such that they form a main section HA of the magnetic core FK1 / FK2, which surrounds the heat sink KK, including the cooling channel KN and the two current conductors SL1 and SL2, and also forms the common-mode filter CM of the filter arrangement FA. The main section HA comprises the two outer transverse lines and the vertical line of the €-shaped magnetic body DE and the entire L-shaped magnetic body IF.The two shorter middle crossbars of the "€"-shaped magnetic body DE, together with their respective corresponding outer crossbars, the corresponding segment of the vertical line of the "€"-shaped magnetic body DE, and the corresponding segment of the "l"-shaped magnetic body IF, each form one of two differential mode filters DM1, DM2. The common-mode filter CM and the two differential mode filters DM1, DM2 are illustrated in Figure 6 by a long dashed line and one of two short dashed lines, respectively.
[0099] Figure 7 shows a fifth schematic cross-sectional view of a further magnetic core according to a fifth embodiment of the invention.
[0100] In this fifth embodiment, the magnetic core FK1 or FK2 is, for example, formed in one piece and has an annular main section HA and three leg sections SA1, SA2, SA3, wherein the three leg sections SA1, SA2, SA3 are formed on the main section HA at equal intervals and extend from the main section HA into the center of a space enclosed by the main section HA, in which the heat sink KK of the filter arrangement is located. 202400723
[0101] 13
[0102] Main section HA forms the common-mode filter CM of the filter arrangement FA, as illustrated by a long-dashed circle in Figure 7. Each pair of adjacent leg sections SA1 and SA2, SA2 and SA3, or SA3 and SA1, together with the respective subsection of main section HA located between these two leg sections SA1 and SA2, SA2 and SA3, or SA3 and SA1, forms one of three differential-mode filters DM1, DM2, DM3 of the filter arrangement FA, as illustrated by a long-dashed ellipse in Figure 7.
[0103] In this embodiment, the filter arrangement has three conductors SL1, SL2, SL3, each extending between two adjacent leg sections SA1, SA2, SA3 essentially parallel to each other and to the heat sink KK.
[0104] The magnetic core FK1 or FK2 forms a filter arrangement, which is, for example, part of a power inverter, where the three conductors SL1, SL2, SL3 form the three phase output conductors of the power inverter. In this case, the filter arrangement, including the conductors SL1, SL2, SL3, can be arranged at the phase current connection of the inverter to an electric machine, thus electrically connecting the inverter to the electric machine on the phase current output side.
[0105] In further embodiments not shown in the figures, the filter arrangement can have four or more conductors, all of which are arranged around the heat sink and, in particular, at equal intervals from one another, and which, together with the heat sink, are enclosed by the respective magnetic cores of the filter arrangement transversely to the longitudinal direction of the heat sink. In this case, the magnetic cores can each have four or more inner leg sections that extend transversely to the longitudinal direction of the heat sink between the heat sink on one side and each of the conductors on the other.
Claims
202400723 14 Patent claims 1. Filter assembly (FA), comprising: at least one heat sink (KK) for cooling the filter assembly (FA), which extends in a longitudinal direction (LR); at least two conductors (SL1, SL2) for conducting currents that extend at least partially in the longitudinal direction (LR) of the at least one heat sink (KK); at least one magnetic core (FK1) which is thermally contacted with the at least one heat sink (KK) and a main section (HA) encompassing the at least one heat sink (KK) and the at least two conductors (SL1, SL2) transversely to the longitudinal direction (LR) as well as at least two leg sections (SA1, SA2) which extend transversely to the longitudinal direction (LR) in the direction of the at least one heat sink (KK); wherein the main section (HA) forms a common-mode filter (CM) of the filter arrangement (FA), and Each of the at least two leg sections (SA1, SA2) forms a difference mode filter (DM1, DM2) of the filter arrangement (FA) with a part of the main section (HA).
2. Filter arrangement (FA) according to claim 1, wherein the at least two leg sections (SA1 , SA2) each extend at least partially between the at least one heat sink (KK) on the one hand and each of the at least two conductors (SL1, SL2) on the other hand.
3. Filter arrangement (FA) according to any one of the preceding claims, wherein, comprising at least two conductors, three or more conductors (SL1, SL2, SL3) which, viewed in the longitudinal direction (LR), are arranged around the at least one heat sink (KK), in particular spaced at equal intervals from each other, and extend at least partially in the longitudinal direction (LR); wherein the at least one magnetic core (FK1) surrounds the three or more conductors (SL1, SL2, SL3) transversely to the longitudinal direction (LR) and has three or more leg sections (SA1, SA2, SA3) which extend transversely to the longitudinal direction (LR) and each at least partially between the at least one heat sink (KK) on the one hand and each of the three or more conductors (SL1, SL2, SL3);202400723 15 wherein each of the three or more current conductors (SL1 , SL2, SL3) with each part of the main section (HA) forms one of three or more differential mode filters (DM1, DM2, DM3) of the filter arrangement (FA).
4. Filter arrangement (FA) according to one of the preceding claims, wherein the at least one magnetic core (FK1) consists of several magnetic bodies which together encompass the at least one heat sink (KK) and the at least two current conductors (SL1, SL2), wherein each of the several magnetic bodies of the at least one magnetic core (FK1) is adjacent to the at least one heat sink (KK) and the at least two current conductors (SL1, SL2).
5. Filter arrangement (FA) according to one of the preceding claims, wherein the at least one magnetic core (FK1) has two magnetic bodies, each in the shape of a “€” or an “E” having two middle crossbars instead of the single middle crossbar, wherein the magnetic bodies are arranged symmetrically to each other on an axis, the axis extending perpendicular to the longitudinal direction (LR) and through the at least one heat sink (KK).
6. Filter arrangement (FA) according to one of claims 1 to 5, wherein the at least one magnetic core (FK1) has two magnetic bodies, each in the shape of an “F”, wherein the magnetic bodies are arranged mirrored to each other at a point of symmetry, wherein the point of symmetry is located in the area of the at least one heat sink (KK).
7. Filter arrangement (FA) according to one of the preceding claims, wherein the at least one cooling body (KK) has a cooling channel (KN) for conveying a cooling liquid, which extends at least partially in the longitudinal direction (LR).
8. Power electronics device comprising: at least one filter arrangement (FA) according to one of the preceding claims, at least one power electronics module with at least two power connections, wherein the at least one filter arrangement (FA) is electrically connected via the at least two conductors (SL1, SL2) to the at least two power terminals of the at least one power electronics module.