Inductive arrangement

Abstract

Inductive arrangement (1), with at least a first and a second winding (2, 3) and a heat dissipation device, characterized in that the heat dissipation device has a first wall part (5) and a second wall part (6), wherein the first wall part (5) is arranged at least partially orthogonal to the second wall part (6), wherein the first winding (2) has a thermal coupling to the first wall part (5) and the second winding (3) has a thermal coupling to the second wall part (6) and / or to the first wall part (5).

Description

The invention relates to an inductive arrangement according to the features of claim 1.In inductive arrangements, in particular in chokes and transformers, power loss arises during operation on the one hand due to the resistance of the winding on the other hand due to losses in the core material, such as hysteresis losses, eddy current losses and excess losses. In order to keep the inductive arrangement within its operating limits with respect to the maximum operating temperature and thus not to impair its service life, this power loss must be dissipated. At the same time, inductive components or arrangements such as chokes and transformers are to become increasingly compact with the same power to be transmitted or greater, which reduces the available cooling surface and thus makes heat dissipation more difficult.German patent application DE 10 2017 126599 A1 discloses a cooling device which makes efficient cooling possible with little installation space by means of air flow generators and guide devices. The inductors are arranged next to each other, wherein the inductors have a horizontal or vertical orientation. The problem of this arrangement is the large space requirement in one spatial direction due to the arrangement of the inductances in series.This problem is solved by an inductive arrangement having the features of claim 1.Advantageous embodiments and developments of the invention are specified in the dependent claims.According to the invention, an inductive arrangement is accordingly provided, having at least a first and a second winding and a heat extraction device, wherein the heat extraction device has a first wall part and a second wall part, wherein the first wall part is arranged at least partially orthogonally to the second wall part, wherein the first winding has a thermal coupling to the first wall part and the second winding has a thermal coupling to the second wall part and / or to the first wall part.The wall parts of the inductive arrangement are components of a cooling device. In addition to the wall parts, the cooling device preferably has cooling bodies which are arranged on the side surfaces of the wall parts. Particularly preferably, the end face of the second wall part is arranged centrally with respect to a side face of the second wall part. The cooling device thus has a T-shaped plan. It is advantageous on a T-shaped plan view that the cooling device is constructed symmetrically. This ensures uniform heat distribution throughout the inductive assembly. In particular, hot spots can thereby be avoided.Advantageously, the first winding has a thermal coupling to the first wall part and the second wall part, and the second winding has a thermal coupling to the first wall part and the second wall part. The first winding can also have only one thermal coupling to the first wall part and the second winding can have a thermal coupling to the first wall part or the second wall part. The thermal coupling can be achieved, for example, by the wall parts lying flat against one another at least in sections. The thermal coupling of a winding on both wall parts is advantageous in particular when the cooling capacity of a wall part is too weak. As a result, one wall part can be made smaller and more cost-effective, since the other wall part is intentionally also involved in the cooling process.The more wall parts are in thermal coupling with a winding, the more power loss can be dissipated. The larger the area of the wall parts which are in thermal coupling with the winding, the more power loss can be dissipated.In an advantageous embodiment of the invention, a first winding axis of the first winding is arranged parallel to the first wall part and a second winding axis of the second winding is arranged parallel to the second wall part or parallel to the first wall part. The winding axes do not have to extend parallel to a wall part but can also have different orientation angles to one another. This is advantageous in particular when at least one wall part has a trapezoidal or parallelogram-shaped outline.In a preferred development of the invention, a first winding axis of the first winding is arranged orthogonally to the first wall part and a second winding axis of the second winding is arranged orthogonally to the second wall part.In a further advantageous embodiment of the invention, the first winding axis of the first winding is arranged parallel to the first wall part and a second winding axis of the second winding is arranged orthogonally to the second wall part or vice versa.In a particularly advantageous development of the invention, the inductive component has a third winding, wherein the third winding has a thermal coupling to the first wall part and / or second wall part. By arranging a third winding, all three side surfaces of the cooling device are occupied by one winding, which increases the utilization of the installation space. In addition, the additional arrangement of a third winding allows more application possibilities. For example, all three windings can be connected in series, all in parallel or only two windings in series. The windings may be part of a transformer.The transformer can be designed as a single-phase, two-phase, three-phase or higher-phase transformer by the individual windings being connected accordingly.In a three-phase arrangement, in particular in the range of two-digit frequencies, the transformer can be connected in a star connection, delta connection or another type of connection. The winding or the windings can be part of a choke or can be a plurality of chokes as individual components.Advantageously, a third winding axis of the third winding is arranged orthogonally or parallel to the first wall part.In an advantageous embodiment of the invention, a third wall part is arranged orthogonally to the second wall part and parallel to the first wall part, wherein the third wall part is thermally coupled to the first and second wall parts. The third wall part is preferably arranged relative to the other wall parts in such a way that the cooling device has an H-shaped plan. The third wall part can also be arranged in such a way that the cooling device has a cross-shaped plan view.In a preferred development of the invention, a fourth winding axis of a fourth winding is arranged parallel or orthogonal to the third wall part. By arranging a third wall part, a further side surface is available on which one or more windings can be arranged.In a particularly advantageous development of the invention, a cooling duct is guided through at least one wall part, preferably through all wall parts. The cooling device can form only a single cooling channel which wraps through all wall parts. A single cooling channel can be formed in a wall part or a plurality of cooling channels can be formed in a wall part. A separate cooling channel can be formed in each wall part. This can extend, for example, in the wall part in the form of a meander. Each cooling channel has its own connection, wherein one connection has one or more inputs and one or more outputs. More than one cooling channel can also run within a wall part. In particular if a cooling channel is guided through all wall parts, it is advantageous if the cooling device is formed from a monolithic unit. As a result, no or fewer leaks occur.A wall part can also be formed from two halves, which in particular represent two fin coolers. Thus, the windings may be mounted on the planar sides of the fin coolers. The fins are thus opposite each other and form a type of internal cooling channel. This can then typically be flushed with air.As working medium through the cooling channel, for example, air, water, water mixtures, liquids with high thermal conductivity, refrigerants (R134a), nitrogens or other gases can be used. In the case of air or other gases, it is expedient to circulate the air or the other gases through the cooling duct by means of a fan. In the case of water or other liquids, it is appropriate for a pump to circulate the liquid through the cooling duct.In a particularly preferred embodiment of the invention, at least two windings are arranged on a side surface of a wall part in a heat-conducting manner. For example, three, four or five windings may be formed on a side surface of the wall part. The windings can be connected in parallel or in series depending on the application. The windings can be arranged one above the other, next to each other and one behind the other.In an advantageous embodiment of the invention, cooling bodies are thermally coupled to the winding and / or core and / or wall parts. The cooling bodies are arranged on one side surface or preferably on all side surfaces of the cooling device. The cooling bodies are mechanically connected to the side surfaces. The wall part and the cooling body can be formed in one piece. The heat sink preferably has lamellae on its side surfaces, which increase the surface of the heat sink and thus increase the heat dissipation. An insulation material, in particular heat-conducting foils, can be applied to the cooling body.Advantageously, the first and / or optionally the third wall part abut at least partially contacting the second wall part. As a result, the thermal coupling between the wall parts is greater or is at all provided. Hotspots between the wall parts can thus be compensated better.In a particularly advantageous development of the invention, the first, second and optionally third wall parts are formed in one piece. Elements formed in one piece have the advantage that the stability and rigidity are higher. This is especially important when structural integrity and performance of the inductive assembly is to be ensured. In addition, the production and the assembly are simplified. Fewer assembly steps have to be carried out and fewer tools and tool changes are required. This also reduces the susceptibility to errors. The components can also be screwed, glued, caulked, clipped or similar to one another.In a particularly preferred development of the invention, the first wall part and / or optionally third wall part is arranged displaceably with respect to the second wall part. The first and optionally third wall parts preferably have elongated holes for this purpose. In connection with screws, bolts or pins, the wall parts can thereby be aligned as necessary. Elongated holes also have the advantage that play between the composite elements is possible under thermal load, so that stresses are reduced. In addition, rail or guide elements can be embedded in the wall parts. In one wall part, a rail element is inserted into the other wall part to be connected, a guide element is attached. Further possibilities for the displaceable fastening of two wall parts are joints or hinges. As a result, a relative movement between the wall parts is possible. Depending on the type of joint, this can be a rotational or sliding movement. A further possible attachment is rollers or ball bearings. In addition, telescopic guides may be used. Telescopic guides have portions which can be extended and contracted.Advantageously, a heat pipe runs through at least one wall part, preferably through all wall parts. One or more heat pipes can also run through each wall part. A heat pipe is a heat transfer element used to efficiently transfer heat from one location to another. A heat pipe has a closed pipe or a cavity within an arrangement in which a working medium, generally a refrigerant, but also water, is contained. The working medium evaporates at the high temperature location and condenses at another low temperature location. Gravity or capillary forces drive the condensate back to the hot spot and the cycle begins anew. In electronic components, a heat pipe is used in conjunction with cooling plates as a heat-conducting pipe. Heat pipes are distinguished by their extremely good heat dissipation at short or medium distances. Heat pipes are advantageous in particular in applications in which only a small installation space is present.In an advantageous embodiment of the invention, the first wall part and / or optionally the third wall part has a hydraulic connection to the second wall part. The wall parts are arranged in contact with one another, whereby there is a high thermal coupling between the wall parts. In addition, a hydraulic connection has a clearance. The wall parts can easily shift relative to each other without the stability being permanently influenced. In addition, hydraulic connections are distinguished by their compact construction and isolation from vibrations and shocks.The inductive arrangement may comprise one or more chokes or one or more transformers. The transformer or choke preferably has a core that has a higher permeability than air. Due to the higher permeability of the core, the magnetic effect of the choke or the transformer can drastically increase. In particular, materials of ferrites, iron powder, amorphous alloys, nanocrystalline alloys, silicon steel or permalloy are preferably used for the core in a choke or in a transformer. The winding is preferably formed from copper or aluminum. Depending on the design, the winding has more or fewer turns. An insulation material can be arranged around the windings.Exemplary embodiments of the invention are explained below with reference to figures. The following are shown: FIG. 1 is a top view of the cooling device, which has a first and second wall part, FIG. 2 shows the cooling device from FIG. 1 with cooling bodies arranged, FIG. 3A is a schematic illustration of the invention, with a first and second wall part and three windings, the winding axes of which run parallel to a wall part, FIG. 3B is a schematic illustration, with a first and second wall part and two windings, FIG. 3C is a schematic illustration, with a first and second wall part and two windings, FIG. 4A is a schematic illustration of the invention with three wall portions and four windings, FIG. 4B shows a schematic illustration of the invention with two wall parts, wherein two windings are arranged on a side face of a wall part, FIG. 5 is a schematic illustration of the invention with two wall parts and three windings, FIG. 6 shows a schematic illustration of the cooling device with two wall parts displaced with respect to one another, and FIG. 7 shows a schematic illustration of the cooling device with three wall parts.In the following figures, like reference numerals designate like parts having like meanings.In FIG. 1, a cooling device 11 is depicted, which has a first wall part 5 and a second wall part 6. The first wall part 5 and the second wall part 6 are rectangular. The first wall part 5 and / or the second wall part 6 can, however, also be formed trapezoidal or parallelogram-shaped.The second wall part 6 is arranged orthogonally to the first wall part 5. However, the first and second wall parts 5, 6 can also have an angle with respect to one another which does not represent a right angle. The second wall part 6 is arranged centrally to a side surface 9 of the first wall part 5. The second wall part 6 can also not be arranged centrally with respect to a side surface 9 of the first wall part 5.The first wall part 5 and the second wall part 6 contact each other. Preferably, the first and second wall parts 5, 6 are screwed together. The first and second wall parts 6 can also be glued, caulked, clipped or nailed to one another. The first and second wall parts 5, 6 can also be arranged in such a way that they do not touch directly. The first and second wall parts 5, 6 are then connected to one another via an auxiliary device. The first and second wall parts 5, 6 can also be connected to one another by means of a hydraulic connection.A cooling channel 12 is formed by the first and second wall parts 5, 6. Each cooling channel 12 has an inlet 13 and an outlet 14. The cooling channel 12 preferably runs in meandering fashion through the first and second wall parts 5, 6. The shape of the cooling channel 12 and the surface condition are designed to be flow-optimized. A single cooling channel 12 can be guided through the first and second wall parts 5, 6. As a result, only one input 13 and one output 14 are required for the cooling device 11 of the inductive arrangement 1, as a result of which the component outlay and the costs are reduced. It is disadvantageous that the requirements for the mechanics increase. In particular, leaks must not occur in the connection between the wall parts 5, 6. In the case of a cooling channel 12 formed in this way, the first and second wall parts 5, 6 are preferably formed from a monolithic unit.FIG. 2 shows the cooling device 11 from FIG. 1, wherein cooling bodies 10 are arranged on the side surfaces 9 of the wall parts 5, 6 of the cooling device 11. The cooling bodies 10 have a planar rear side 16 and two planar secondary sides 15. The front side 17 of the cooling body 10 has two semicircles 18. The semicircles 18 of a heat sink 10 are each of the same size. The heat sink forms three pillars 19, 20, wherein the pillars 19, 20 project in the direction of the front side 17 of the heat sink 10. The outer pillars 19 are part of the secondary side 15 of the heat sink 10, wherein the outer pillars 19 are larger than the central pillar 20.The outer pillar 19 of a cooling body 10 which abuts the second wall part 6 and is arranged closer to the first wall part 5 is at a distance from the first wall part 5. However, this outer pillar 19 can also bear directly against the first wall part 5 and have a thermal coupling with the first wall part 5, as a result of which the heat dissipation can be increased.The rear side 16 of the cooling body 10 is directly connected to a side surface 9 of a wall part 5, 6 of the cooling device 11. In FIG. 2, a cooling body 10 is arranged on the side surfaces 9 of the first and second wall parts 5, 6. The cooling bodies 10 arranged on the side surfaces 9 of the second wall part 6 are arranged in an axis-symmetrical manner with respect to one another. A cooling channel 12 is guided through each of the first and second wall parts 5, 6 of the cooling device 11. It is also possible for only one continuous cooling duct 12 to extend through both wall parts 5, 6.In the semicircles 18 of the heat sink 10, a winding 21 is arranged in the assembled state. The winding axis W is arranged parallel to the side surface 9 of a wall part 5, 6. The winding 21 has N lines, where N is a natural number. The winding 21 may also have a number of windings 21 different from N. The semicircle 18 ensures that the winding 21 is arranged with the largest possible area as close to the heat sink 10 as possible, in order to dissipate as much heat as possible. The cooling body 10 and the wall parts 5, 6 are preferably formed from a monolithic unit.The windings 21 are preferably wound around cores made of ferrite or iron powder. As a result, the inductance of the inductor or of the transformer increases significantly.FIG. 3A shows a schematic illustration of the inductive arrangement 1. A first wall part 5 and a second wall part 6 can be seen, wherein the first wall part 5 is arranged orthogonally on the second wall part 6. The first wall part 5 and the second wall part 6 together form a cooling device 11.On the side surfaces 9 of the second wall part 6, a second winding 3 and a third winding 4 are arranged. The first winding 2 is disposed on the side surface 9 of the first wall part 5. The first winding axis W 1 of the first winding 2 is arranged parallel to the side surface 9 of the first wall part 5. The first winding axis W 1 of the first winding 2 can also be arranged parallel to the side surface 9 of the first wall part 5. The first winding 2 may be thermally coupled to the first wall part 5 and / or second wall part 6.The second winding 3 and the third winding 4 are arranged on a side surface 9 of the second wall part 6, respectively. The winding axes W 2, W 3 of the second winding 3 and third winding 4 run parallel to the side surface 9 of the second wall part 6, and the winding axis W 2, W 3 of the second or third winding 3, 4 can also run perpendicular to the side surface 9 of the second wall part 10. The second winding 3 and the third winding 4 are preferably thermally coupled to the second and / or first wall part 5, 6.On both side surfaces 9 of the second wall part 6, a second and third winding 3, 4 are arranged. The second and third windings 3, 4 have a second and third winding axis W 2, W 3. The second and third winding axes W 2, W 3 are each arranged parallel to the side surface 9 of the second wall part 6.FIG. 3B shows a schematic illustration of the inductive arrangement 1. The inductive arrangement 1 has the same cooling device 11 as in FIG. 3A.Two windings 2, 3 are thermally coupled to the cooling device 11. On the first wall part 5, the first winding axis W 1 of the first winding 2 runs parallel to the side surface 9 of the first wall part 5. the second winding axis W 2 of the second winding 3 runs parallel to a side surface 9 of the second wall part 6. the winding axis W 1, W 2 of the first winding 2 and / or second winding 3 can / can also run perpendicular to the first wall part 5 or the second wall part 6.In FIG. 3C, a schematic illustration of the inductive arrangement 1 is shown 1. the inductive arrangement 1 has the same cooling device 11 as in FIG. 3A.Two coils 21 are thermally coupled to the cooling device 11. The second winding 3 and the third winding 4 are arranged on the side surfaces 9 of the second wall part 6. No winding 21 is arranged on the side surface 9 of the first wall part 5. The winding axes W 2, W 3 of the second winding 3 and of the third winding 4 run parallel to the side surface 9 of the second wall part 6.FIG. 4A shows a schematic illustration of the inductive arrangement 1. The cooling device 11 has a first, second and third wall part 5, 6, 7, wherein the first wall part 5 and the third wall part 7 are oriented orthogonally to the second wall part 6. The first wall part 5 and the third wall part 7 preferably touch the second wall part 6. the first wall part 5 has a side surface 9, the second wall part 6 has two side surfaces 9 and the third wall part 7 has a side surface 9, on each of which a winding 2, 3, 4, 8 is arranged.On the side surface 9 of the third wall part 7, a fourth winding 8 is arranged. The first winding 2 may be thermally coupled to the first and second wall parts 5, 6. On the side surfaces 9 of the second wall part 6, the second winding 3 and the third winding 4 are arranged. The winding axes W1-W4 of the windings 21 all run parallel to the wall part 5-7 to which they are arranged. The winding axes W 1-W 4 of the windings 21 can also run perpendicular to the wall part 5- 7 to which they are arranged. The first to fourth windings 2, 3, 4, 8 may be in thermal coupling with each wall part 5- 7. A winding 21 does not have to be arranged on all side faces 9.FIG. 4B shows a schematic illustration of the inductive arrangement 1, wherein the same cooling device 11 is depicted as in FIG. 3A.A first winding 2 is arranged on the side surface 9 of the first wall part 5, wherein the winding axis W 1 of the first winding 2 runs parallel to the side surface 9 of the first wall part 5.On one of the side surface 9 of the second wall part 6, two second windings 3 are arranged. The winding axes W 2 of the two second windings 3 run parallel to the side surface 9 of the second wall part 6, but more than two second windings 3 can also be arranged on a side surface 9 of a wall part 5, 6. In particular, three, four or five windings 21 can be arranged on a single side surface 9. The winding axes W 2 of the second windings 3 can differ or be the same with respect to the side surface 9 of the second wall part 6. A different number of second windings 3 can also be arranged on different side surfaces 9. More than one winding 21 can likewise be arranged on each other side face 9.FIG. 5 shows a schematic illustration of the inductive arrangement 1. The inductive arrangement 1 has the same cooling device 11 as in FIG. 3A.A first winding 2 is arranged on the first wall part 5, and a second winding 3 and a third winding 4 are arranged on the second wall part 6. The winding axes W 1-W 3 of the first to third windings 2- 4 are perpendicular to the side surface 9 of the wall part 5, 6 associated with the respective wall part.FIG. 6 shows a schematic illustration of the cooling device 11 of the inductive arrangement 1. the first wall part 5 is orthogonal to the second wall part 6. the first wall part 5 and the second wall part 6 preferably touch one another and are thermally coupled to one another. The end face 22 of the second wall part 6 is arranged offset on a side surface 9 of the first wall part 5. The second wall part 6 can be arranged on the side surface 9 of the first wall part 5 at different positions. The second wall part 6 is displaceable both in height and along the longitudinal axis of the first wall part 5.The displacement can be realized with the aid of an elongated hole or many individual holes. The elongated hole or the individual hole is formed in the first or second wall part 5, 6. The individual wall parts 5, 6 are fixed to one another by means of a screw or the like. Preferably, in such an arrangement, each wall part 5, 6 has its own cooling channel 12. However, only one cooling channel 12 can also be guided through the entire cooling device 11. In addition to a screw connection, rail and guide elements, slide bearings, joints or hinges, telescopic guides or pneumatic or hydraulic cylinders can also fix the first and second wall parts 5, 6 in a displaceable manner with respect to one another.It is also possible for more than two wall parts 5, 6, in particular three wall parts 5, 6, 7, to be connected to one another in a displaceable manner.FIG. 7 shows a schematic illustration of the cooling device 11. The cooling device 11 has a first wall part 5, a second wall part 6 and a third wall part 7. The second wall part 6 and the third wall part 7 are oriented orthogonally to the first wall part 5. The first wall part 5 and the second wall part 6 extend parallel to each other. The second wall part 6 and the third wall part 7 are connected to the same side surface 9 of the first wall part 5. The second wall part 6 and the third wall part 7 may be slidably connected to the side surface 9 of the first wall part 5. The second wall part 6 and the third wall part 7 can also be arranged on different side surfaces 9 of the first wall part 5.List of reference characters1 Inductive arrangement 2 First winding 3 Second winding 4 Third winding 5 First wall part 6 Second wall part 7 Third wall part 8 Fourth winding 9 Side surface 10 Heat sink 11 Cooling device 12 Cooling channel 13 Inlet 14 Outlet 15 Secondary side 16 Rear side 17 Front side 18 Semicircle 19 Outer pillar 20 Central pillar 21 Winding 22 End side W 1 First winding axis W 2 Second winding axis W 3 Third winding axis W 4 Fourth winding axis W Winding axisReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2017 126599 A1

[0003]

Claims

Inductive arrangement (1) having at least a first and a second winding (2, 3) and a heat-removing device, characterized in that the heat-removing device has a first wall part (5) and a second wall part (6), wherein the first wall part (5) is arranged at least partially orthogonally to the second wall part (6), wherein the first winding (2) has a thermal coupling to the first wall part (5) and the second winding (3) has a thermal coupling to the second wall part (6) and / or to the first wall part (5).Inductive arrangement (1) according to claim 1, characterised in that the first winding (2) has a thermal coupling to the first wall part (5) and the second wall part (6) and the second winding (3) has a thermal coupling to the first wall part (5) and / or the second wall part (6).Inductive arrangement (1) according to claim 1 or 2, characterised in that a first winding axis (W1) of the first winding (2) is arranged parallel to the first wall part (5) and a second winding axis (W2) of the second winding (3) is arranged parallel to the second wall part (6) or parallel to the first wall part (5).Inductive arrangement (1) according to claim 1 or 2, characterised in that a first winding axis (W1) of the first winding (2) is arranged orthogonally to the first wall part (5) and a second winding axis (W2) of the second winding (3) is arranged orthogonally to the second wall part (6) or orthogonally to the first wall part (5).Inductive arrangement (1) according to one of the preceding claims, characterized in that the inductive component (1) has a third winding (4), wherein the third winding (4) has a thermal coupling to the first wall part (5) and / or second wall part (6).Inductive arrangement (1) according to one of the preceding claims, characterized in that a third winding axis (W3) of the third winding (4) is arranged orthogonally or parallel to the first wall part (5).Inductive arrangement (1) according to one of the preceding claims, characterized in that a third wall part (7) is arranged orthogonally to the second wall part (6) and parallel to the first wall part (5), wherein the third wall part (7) is thermally coupled to the first and second wall part (5, 6).Inductive arrangement (1) according to one of the preceding claims, characterized in that a fourth winding axis (W4) of a fourth winding (8) is arranged parallel or orthogonal to the third wall part (7).Inductive arrangement (1) according to one of the preceding claims, characterized in that a cooling duct (12) is guided through at least one wall part (5, 6, 7), preferably through all wall parts (5, 6, 7).Inductive arrangement (1) according to one of the preceding claims, characterized in that at least two windings (2, 3, 4) are arranged on a side face (9) of a wall part (5, 6, 7) in a heat-conducting manner.Inductive arrangement (1) according to one of the preceding claims, characterized in that the cooling body (10) is thermally coupled to the winding and / or core and / or wall part (5, 6, 7).Inductive arrangement (1) according to one of the preceding claims, characterized in that the first wall part (5) and / or optionally third wall part (7) and second wall part (6) are at least partially in contact with one another.Inductive arrangement (1) according to one of the preceding claims, characterized in that the first, second and optionally third wall parts (5, 6, 7) are formed in one piece.Inductive arrangement (1) according to one of the preceding claims, characterized in that the first wall part (5) and / or optionally third wall part (7) is displaceable with respect to the second wall part (6).Inductive arrangement (1) according to one of the preceding claims, characterized in that a heat pipe runs through at least one wall part (5, 6, 7), preferably through all wall parts (5, 6, 7).Inductive arrangement (1) according to one of the preceding claims, characterized in that the first wall part (5) and / or optionally the third wall part (7) has a hydraulic connection to the second wall part (6).

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