EP2977996A1 - Choke coil of a power converter - Google Patents
Choke coil of a power converter Download PDFInfo
- Publication number
- EP2977996A1 EP2977996A1 EP14177832.4A EP14177832A EP2977996A1 EP 2977996 A1 EP2977996 A1 EP 2977996A1 EP 14177832 A EP14177832 A EP 14177832A EP 2977996 A1 EP2977996 A1 EP 2977996A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling plate
- coil
- coil winding
- cooling
- core
- 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- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
Definitions
- the invention relates to a choke coil of a power converter with a coil winding.
- inductors By means of inductors, the proportion of comparatively high frequencies is reduced within electrical currents. Such high-frequency currents occur, for example, in converters, wherein the operation of a semiconductor switch leads to comparatively high-frequency harmonics within the switched current. Therefore, such a reactor is incorporated in the high-frequency current-carrying conductors.
- Reactive coils usually have a low-resistance coil winding with a defined inductance. As a result, the resistance of the choke coil is frequency-dependent, wherein in the absence of a harmonic of the ohmic resistance is comparatively low.
- the thermal power dissipation generated by the choke coil is not negligible.
- the invention has for its object to provide a particularly suitable inductor, which can be operated in particular relatively safe and / or by means of a comparatively chemically aggressive cooling medium, and which is preferably suitable for maritime applications.
- the choke coil is part of a power converter, by means of which preferably a DC voltage is created.
- the choke coil is located on the DC side of such a converter.
- the power converter itself is, for example, part of a ship and serves to operate an accessory or an electric motor, by means of which the ship is moved.
- the electric motor is part of a bow thruster.
- the choke coil is for example provided and set up to be operated safely at an electrical voltage of more than 500 V, 600 V and up to 1000 V or 2000 V.
- the current carrying capacity of the choke coil is greater than 100 A, 120 A, 200 A, 300 A, 500 A, 1000 A or 1500 A.
- the current carrying capacity is less than 180 A, 200 A, 500 A, 1000 A or 2000 A. ,
- the choke coil has a hollow cylindrical coil winding, which is made for example of an insulated enameled wire.
- the winding is made of a conductor strip whose width is, for example, less than 10cm, 15cm, 25cm, 35cm, 40cm, 50cm and especially less than 60cm.
- the width is greater than 1cm, 2cm, 5cm, 10cm, 15cm, 25cm, 30cm, 35cm or 40cm.
- width is equal to 19 cm.
- the width here denotes the extension of the strip parallel to the axis of the hollow cylindrical coil winding.
- the thickness of the band is matched to the corresponding current carrying capacity.
- the material of the conductor ie in particular the band or the wire, made of a copper or an aluminum, thus containing copper or aluminum.
- the conductor is either pure copper or aluminum or an alloy containing these elements.
- the conductor is made of a solid material.
- the coil winding is wound from an anodized aluminum strip.
- the coil winding is shaped in the manner of a hollow cylinder, thus consequently extends along an axis and thus has two cover surfaces, also referred to as base surfaces, which are perpendicular to the axis and form the boundary of the coil winding along the axis.
- the cross section of the coil winding is designed to be annular or in the manner of a rectangle perpendicular to the axis, wherein the corners are preferably rounded, which leads to a reduced material load.
- the coil winding is formed by means of a single layer of the conductor used for formation, or a plurality of windings are stacked in layers, wherein the individual layers are in particular in direct mechanical contact, resulting in increased stability and reduced size.
- the choke coil further has a cooling plate, which is thermally connected to one of the top surfaces of the coil winding.
- the cooling plate is attached to the coil winding.
- the cooling plate forms a heat sink opposite the coil winding.
- the cooling plate is arranged perpendicular to the axis of the coil winding and preferably in mechanical contact with the coil winding, which takes place, for example, over the entire surface along the top surface.
- the cooling plate in turn, for example on the side facing away from the coil winding cooling fins or the like, in order to derive the heat absorbed by the coil winding to an environment.
- the cooling plate operation of the inductor is possible even at relatively high outside temperatures.
- it is possible to optimize the coil winding to a comparatively high current carrying capacity whereas an optimization of the cooling plate can be carried out on a comparatively efficient heat dissipation.
- the cooling plate is made resistant to seawater, so that the Cooling plate can be cooled by means of relatively aggressive seawater, which would otherwise damage the coil winding.
- the choke coil has a core disposed within the coil winding.
- the core consists for example of a soft magnetic material and in particular of iron.
- the core runs along the axis of the hollow-cylindrical coil winding and / or is arranged centrally within the coil winding.
- spacers are arranged between the core and the coil winding, by means of which a direct mechanical contact between the core and the winding is avoided.
- the core for example, lies substantially completely against the inner wall of the coil winding, wherein an electrically insulating layer is expediently located between these.
- the core is also thermally contacted with the cooling plate so that, in use, heat is also transferred from the core to the cooling plate. Due to the use of a core, it is possible to increase the inductance of the choke coil, so that a filtering effect by means of the choke coil is improved.
- the core has a cuboid shape.
- the cross section of the core is perpendicular to the axis of the coil winding, wherein the cross section of the coil winding is annular.
- a material stress of the coil winding in the region of any edges of the core is excluded, which could lead to material fatigue or otherwise damage.
- the coil winding has a number of layers, air inclusion between individual layers is excluded.
- the core comprises a cooling tube, through which a fluid is expediently conducted during operation of the choke coil.
- a cooling liquid is used, which facilitates the heat dissipation.
- the cooling tube preferably has suitable connections for such a cooling circuit.
- the cooling tube is made of a stainless steel or CuNiFe.
- steel of steel grades 4 or upwards is used.
- the cooling tube is preferably made of austenitic steel 1.4529 or 1.4562 or of super duplex steel 1.4410. In this way, comparatively aggressive cooling liquids, such as seawater, can be used.
- the cooling tube is straight and shaped in the manner of a hollow cylinder and has, for example, an annular cross-section.
- the cooling tube is aligned parallel to the axis of the coil winding, which facilitates assembly.
- the core comprises a core body within which the cooling tube is located.
- the core body is conveniently made of iron.
- the core body and the cooling tube are pressed together.
- the cooling tube is expediently positioned in the center of the core body and in particular point-symmetrically with respect to the axis of the coil winding. In this way, a formation of different temperature levels within the core and / or the coil winding is substantially excluded.
- the outer contour of the cooling plate corresponds to the outer contour of the coil winding.
- the cooling plate is aligned with the coil winding, so that the choke coil is comparatively compact.
- the cross section of the cooling plate is larger than the cross section of the coil winding.
- the cooling plate is at least on one side of the coil winding. Consequently, the cooling plate has a comparatively large volume, which improves the heat transfer.
- the cooling plate is recessed to form a recess.
- the recess is shaped in the manner of a pot and has a bottom. In other words, the cooling plate is at least not fully opened in the region of the depression. Inside the recess the coil winding is at least partially arranged. In this way, the coil winding is stabilized with respect to the cooling plate and the inductor comparatively robust.
- the cooling plate is electrically isolated from the coil winding.
- an electrically insulating layer is used for this purpose.
- a heat-conducting foil which is expediently made from an aromatic polyimide is used as the electrically insulating layer.
- the die-conducting film consists of an aramid, in particular of an aramid paper.
- heat-conducting foil is made of NOMEX®.
- a thermal grease or the like e.g., electrically insulating thermal interface material
- the heat-conducting foil is formed from a silicone. Consequently, it is possible to make the cooling plate of an electrically conductive material having comparatively good heat conduction properties, excluding an electric short circuit.
- the cooling plate is made of aluminum, which leads to a reduced weight of the inductor.
- the cooling plate is made of copper or a copper alloy, which increases the heat conduction properties of the cooling plate.
- the cooling plate is made of a stainless steel or CuNiFe.
- steel of steel grades 4 or upwards is used.
- the cooling plate is preferably made of austenitic steel 1.4529 or 1.4562 or of super duplex steel 1.4410. In this way, a cooling of the cooling plate by means of relatively aggressive media, such as seawater, allows.
- the cooling plate preferably has a cooling tube, in particular a number of cooling tubes.
- a cooling tube in particular a number of cooling tubes.
- the cooling tube is disposed within a body of the cooling plate and preferably compressed within the body, which on the one hand leads to a comparatively efficient thermal connection and on the other hand to a robust mechanical connection between them.
- the cooling tube is made of stainless steel or CuNiFe, which increases the chemical robustness of the cooling plate. For example, steel of steel grades 4 or upwards is used.
- the cooling tube is preferably made of austenitic steel 1.4529 or 1.4562 or of super duplex steel 1.4410.
- seawater is passed as fluid through the cooling tube, if the choke coil is used on a ship or near the coast.
- the cooling tube is designed straight so that the manufacturing costs of the cooling plate are reduced.
- the cooling plate is cast with the coil winding.
- the cooling plate is connected to the coil winding by means of a potting compound, which increases the robustness of the choke coil.
- the cooling plate is connected by means of a thermally conductive adhesive to the coil winding. During manufacture, pressure is exerted on the cooling plate in the direction of the coil winding until the adhesive or potting compound hardens, which improves the thermal connection.
- the cooling plate is connected by means of a so-called.
- Thermal interface material to the coil winding which has a high thermal conductivity, as well as a flexibility, and is made for example of a silicone.
- the choke coil has a further plate, wherein the coil winding is arranged between this plate and the cooling plate.
- the two plates are in mechanical contact with the coil winding, either directly or for example via an electrically insulating Layer.
- the plate is designed as a cooling plate, so that the choke coil has two cooling plates.
- one of the cooling plates is assigned to exactly one of the two top surfaces of the coil winding. In other words, each of the top surfaces of the coil winding is thermally connected to each one of the cooling plates. As a result, heat dissipation from the coil winding is improved.
- the two cooling plates are configured identically, thus therefore have the same developments, if they are available.
- one of the cooling plate is further developed according to one of the training, whereas the other is not developed or designed according to another variant.
- the choke coil has a second hollow-cylindrical coil winding, which is, for example, similar to the already existing coil winding.
- the two coil windings are electrically contacted with each other and suitably connected in series.
- the second cooling plate is arranged, wherein the two coil windings are suitably connected thermally to the second cooling plate. Consequently, the second cooling plate serves to cool the two coil windings.
- the two coil windings are also mechanically in contact with the second cooling plate and suitably attached thereto. The contact is made, for example, directly or by means of an electrically insulating, but thermally conductive layer.
- the choke coil comprises the second hollow-cylindrical coil winding, wherein the cooling plate is thermally connected to one of its cover surfaces.
- the two coil windings are located on the same side of the cooling plate.
- the two cover surfaces of the respective coil windings are in one plane.
- the two coil windings run parallel to one another.
- the two coil windings are of similar construction, and therefore have the same structure and in particular the same dimensions, which reduces storage in the production of the inductance coil.
- three such coil windings are part of the choke coil, wherein each of the choke coils is associated with a phase of a three-phase current. In this way it is possible to operate by means of the choke coil an electrically commutating electric motor.
- the coil windings are enclosed by plastic, which leads to reduced costs in the production.
- the plastic is salt water resistant.
- the choke coil comprises a distributor for the cooling plates, in particular of a Plastic is made.
- the individual cooling tubes are supplied with a cooling medium.
- the distributor is made of a seawater-resistant alloy.
- Distributor is understood in particular a node of the individual cooling tubes, which serves, for example, the allocation of a coolant flow to the individual cooling tubes or a collection of coolant, which was passed through the individual cooling tubes.
- each of the coil windings has a core which is in particular magnetically short-circuited by means of a yoke, which is preferably parallel to the cooling plate.
- the yoke is expediently located on one of the sides of the cooling plate, whereas the coil windings are located on the opposite side.
- the cooling plate corresponding recesses through which the cores of the core-yoke composite are guided.
- the cooling plate is free of any recesses and shaped, for example, in the manner of a rectangle.
- one of the edges of the cooling plate faces the two cores and is suitably in mechanical contact therewith.
- the cooling plate is thermally connected to the two cores, so that heat is also conducted from the two cores to the cooling plate.
- the composite of the two cores and the yoke is in one piece, which increases the stability and improves the electrical properties.
- the composite is preferably U-shaped or, if further coils are present, M-shaped or comb-shaped.
- each of the coil windings is associated with a cooling plate, wherein the cooling plates are in particular in a plane which is located between the yoke and the coil windings.
- the cross section of each of the cooling plates is equal to that of the respectively associated coil winding. In this way it is possible to manufacture the composite coil winding and cooling plate before assembly of Kernjochverbunds.
- each of the cooling plates is configured substantially rectangular, with each of the rectangular shapes is parallel to the respective top surface of the associated coil winding.
- the cooling plates are suitably arranged perpendicular to the yoke, which stabilizes them.
- a frictional connection between the yoke and each of the coil windings on the respective cooling plates is created.
- each of the coil windings associated with two cooling plates which are separated from each other by means of the respective core.
- a further embodiment of the choke coils of the power converter has a hollow-cylindrical coil winding, which is expediently created from an insulated conductor.
- the insulated conductor is in particular an enameled wire or a ribbon-shaped conductor, which in particular has a width between 10 cm and 60 cm, and e.g. of 19 cm.
- the width of the conductor is parallel to the axis of the coil winding.
- the material of the electrical conductor is, for example, aluminum or copper, and the conductor is wound to the coil winding.
- the coil winding has one or more layers. Within the coil winding a cuboid core is arranged, which is made in particular of a soft magnetic material and, for example, iron. Suitably, the coil winding is wound from an anodized aluminum strip.
- the edges of the core located within the coil winding are provided at least in sections by means of L-shaped spacers.
- each of the edges is at least partially surrounded by one of the spacers.
- the spacers are made of a plastic, and each of the spacers is preferably in mechanical contact with the coil winding, which in particular has a rectangular cross-section. Due to the spacers, the core is spaced from the coil winding, which on the one hand prevents electrical short circuit and on the other hand prevents damage to the coil winding due to the relatively sharp edges of the core.
- the choke coil further includes a cooling plate disposed between mutually adjacent spacers.
- the cooling plate is made substantially rectangular in shape, wherein the cooling plate is thermally contacted with the core and / or the coil winding.
- the cooling plate is connected to the respective component in direct mechanical contact or by means of an electrically insulating, but thermally conductive layer.
- the cooling plate is parallel to the core.
- the cooling plate itself has a cooling tube made of stainless steel or CuNiFe or a CuNiFe alloy.
- the cooling tube or tubes preferably run parallel to the axis of the coil winding, which facilitates mounting and connection of the cooling tubes, and suitably straight, which reduces the manufacturing cost of the cooling plate.
- the cooling tubes are pressed in particular within a copper or aluminum body. During operation of the choke coil, a cooling fluid is passed through the cooling tubes and in this way removes heat from the cooling plate. This is due to the choice of materials also allows operation with seawater.
- FIG. 1 is a sectional view along the axis of a coil winding 2, a choke coil 4 is shown.
- the coil winding 2 has an annular cross-section perpendicular to its axis and is wound from an electrically insulated copper or aluminum strip, wherein for the preparation of the band is stacked in several layers. Consequently, the coil winding 2 has the form of a roller with a central recess 6.
- a cylindrical core 8 is arranged with a round base, which is in mechanical contact with the coil winding 2 via an electrical insulating layer 10.
- the core 8 with respect to the recess 6 via.
- the core 8 projects out of the recess 6.
- the core 8 itself has a core body 12 made of soft magnetic iron, which has an annular cross-section.
- a cooling tube 14 made of CuNiFe is positively positioned.
- the choke coil 4 further comprises a made of a copper or an aluminum cooling plate 16, whose cross-section perpendicular to the axis of the coil winding 2 is greater than that of the coil winding 2 itself.
- the cooling plate 16 is cup-shaped and thus has a recess 18 with a bottom 20.
- a recess 22 is centrally inserted, whose cross section corresponds to the cross section of the core 8, which is arranged therein.
- the recess 6 of the coil winding 2 and the recess 22 of the cooling plate 16 are aligned, and the core 8 is thermally bonded to the cooling plate 16.
- the radius of the round recess 18 corresponds to the radius of the coil winding 2, which is arranged in a form-fitting manner within the recess 18.
- one of the top surfaces 24 of the coil winding 2 is thermally connected to the cooling plate 16, wherein no direct mechanical contact between the cooling plate 16 and the coil winding 2 is present.
- the recess 18 is namely lined by means of an electrically insulating heat-conducting film 26, so that a short circuit between the coil winding 2 and the cooling plate 16 is excluded even with a defective or incomplete insulation of the conductor of the coil winding 2.
- the choke coil 4 is part of a power converter, which is in use on a ship.
- high-frequency components are suppressed within an electric current.
- the electrical current to be filtered flows through the coil winding 2, the high-frequency components leading to an increase in the electrical resistance due to the resulting magnetic field. This effect is enhanced by means of the core 8.
- Due to the flowing electric current the temperature of the coil winding 2 increases. This heat is released on the one hand via the heat-conducting foil 26 to the cooling plate 16 and on the other hand, to a reduced extent, via the electrical insulating layer 10 to the core.
- Seawater is passed through the cooling tube 14, the temperature of which is lower than that of the core 8.
- the heat of the core 8 is discharged to the seawater, and thus the reactor 4 cooled efficiently. Consequently, it is possible to conduct comparatively large electric currents by means of the choke coil 4 without damaging the coil winding 2.
- FIG. 2 is a further embodiment of the choke coil 4 shown in the above illustration.
- the coil winding 2 is made of a made of aluminum, insulated conductor.
- the core 8 does not have the cooling tube 14.
- the core body 12 is made of a solid material and forms the Core 8.
- the connection of the coil winding 2 to the heat sink 16 is again via the heat-conducting film 26, wherein a thermally conductive adhesive is used for fastening.
- the shape of the cooling plate 16 substantially corresponds to the previous embodiment, but the cooling plate 16 includes a cooling plate body 28 into which a cooling tube 30 is pressed.
- the straight running cooling tube 30 is made of a stainless steel.
- FIG. 3 a third embodiment of the choke coil 4 is shown, wherein the core 8 of the second embodiment and the cooling plate 16 of the first embodiment of the choke coil 4 corresponds.
- the coil winding 2, the electrical insulating layer and the heat conducting film 26 are not changed.
- the cooling plate 16 itself is made of CuNiFe.
- the choke coil 4 comprises a further cooling plate 32 whose shape corresponds to the first cooling plate 16.
- the second cooling plate 32, the recess 18 which is lined with the heat-conducting foil 26.
- the recess 18 points in the direction of the first cooling plate 16.
- the coil winding 2 is arranged in a form-fitting manner between the two cooling plates 16, 32 and connected thereto by means of a casting compound (not shown) or by means of an adhesive or a thermal interface material. Also, the material of the second cooling plate 32 corresponds to the first cooling plate 16, and the core 8 protrudes through the second cooling plate 32. Accordingly, during operation of the choke coil 4, both cover surfaces 24 of the hollow cylindrical coil winding 2 are cooled by means of one of the cooling plates 16, 32. Due to the choice of material for the cooling plates 16, 32, they can be flushed or flowed through by seawater without the components of the choke coil 4 being impaired or destroyed.
- FIG. 4 is a further education of in FIG. 3 shown choke coil 4 having a second coil winding 34, which is electrically connected in series with the first coil windings 2.
- the two coil windings 2, 34 are identical in this case, ie they do not differ, and correspond in each case to the one in FIG FIG. 3 shown variant.
- the first cooling plate 16 is not changed.
- the second cooling plate 32 is modified and now has two recesses 18, which are located on opposite sides and facing away from each other. The shape of each of the recesses 18 corresponds to the recess 18 of the first cooling plate 16.
- each of the recesses 18 of the second cooling plate 32 which is made of a stainless steel, one of the two coil windings is arranged 2,34, wherein the electrical insulation by means of the heat-conducting 26 between the first coil windings 2 and the second cooling plate 32 is omitted.
- the remaining top surface of the second coil winding 34 is thermally connected to a third cooling plate 36, which corresponds to the embodiment of the second cooling plate 32, which in FIG. 3 is shown.
- the arrangement of the second coil winding 34 with respect to the third cooling plate 36 corresponds to the in FIG. 3
- the core 8 is extended by substantially twice and protrudes through the two coil windings 2,34 and all three cooling plates 16,32,36.
- the two coil windings 2, 34 and the cooling plates 16, 32, 36 are potted together, which leads to a comparatively stable choke coil 4.
- FIG. 5 is according to the above illustrations and in FIG. 6 in a plan view, another embodiment of the choke coil 4 is shown.
- the choke coil 4 comprises the coil winding 2 and the cooling plate 16, whose cross section is modified in each case to a rectangular shape.
- the connection between the coil winding 2 and the cooling plate 16 is carried out according to the in FIG. 1 shown variant.
- the choke coil 4 includes the second coil winding 34 and the second cooling plate 32.
- the second coil winding 34 is similar to the first coil winding 2 and the second cooling plate 32 is made similar to the first cooling plate 16.
- the connection between the two as well as their respective core 8 do not differ.
- the two cooling plates 16, 32 lie in one plane, wherein the respective associated coil windings 2, 34 are located on the same side with respect to this plane.
- the two cooling plates 16, 32 are spaced from each other.
- the two cooling plates 16,32 and the coil windings 2, 34 do not touch.
- the two cores 8 are connected by means of a cuboid yoke 38, which rests on the two cores 8 and is made of a soft magnetic iron.
- the yoke 38 is aligned with the respective edges of the cores arranged perpendicular thereto 8. By means of the yoke 38, a magnetic inference between the two cores 8 is created, which improves the electrical properties of the choke coil 4.
- FIGS. 7 and 8 is another embodiment of the choke coil 4 according to FIG. 5 or 6 shown.
- the coil windings 2, 34, the cores 8 and the yoke 38 are left unchanged.
- the two cooling plates 16, 32 are modified.
- the first cooling plate 16 is now not square, but designed rectangular, the course is substantially parallel to the yoke 38. In this direction, the cooling plate 16 is extended, so that the cooling plate 16, the two coil windings 2, 34 spans.
- the cooling plate 16 has two recesses 18, within which one of the coil windings 2, 34 rests and is connected to a thermally conductive adhesive, between each of which the heat-conducting film 26 is arranged.
- the cooling plate 16 Perpendicular to the yoke 38 and to the cores 8 is the extent of the Cooling plate 16 reduced.
- the cooling plate 16 is located in this direction only on one side of the two cores 8 and the recess 22 is not present.
- the second cooling plate 32 is arranged in mirror image to the cooling plate 16, which is configured in the same manner as the first cooling plate 16. Consequently, the two coil windings 2, 34 with the two cooling plates 16, 32 in mechanical contact and thermally connected to each of these.
- FIG. 9 is another variation of in FIG. 5,6 Shown reactor 4 shown in a plan view.
- both the first cooling plate 16 and the second cooling plate 32 is changed.
- the cooling plate 16 is now divided into two parallel legs 16 a, 16 b, which are oriented perpendicular to the cores 8 and the yoke 38.
- the two legs 16a, 16b are in contact with the associated core 8 and the coil winding 2.
- the second coil winding 34 facing leg 16b is aligned here in the edge region with the associated coil winding 2, whereas the remaining leg 16a protrudes.
- the second cooling plate 32 is made in mirror image to the further cooling plate 16. In other words, the second cooling plate 32 has two legs 32a, 32b.
- FIG. 10 is a plan view of a last embodiment of the choke coil 4 is shown.
- the choke coil 4 comprises the hollow cylindrical coil winding 2 whose base is square. Within the central recess 6 of the cuboid shaped core 8 is arranged centrally, wherein the core 8 is spaced from the coil winding 2.
- the mechanical contact between the core 8 and the coil winding 2 is created by means of four spacers 40 whose cross section is perpendicular to the axis of the coil winding 2 each L-shaped.
- Each of the spacers 40 made of a plastic is arranged in the region of one of the edges 42 of the core 8, which run parallel to the axis of the coil winding 2.
- each of these edges 42 is replaced by a the four spacers 40 encompassed so that damage to the coil winding 2 due to the relatively sharp edges 42 of the core 8 is excluded.
- a first cooling plate 16 is arranged in each case, which is cuboid-shaped and oriented parallel to the axis of the coil winding 2.
- the first cooling plates 16 made of copper are electrically insulated from the coil winding 2 in direct mechanical contact with the core 8 and by means of a thermally conductive layer, not shown here.
- Each of the first cooling plate 16 has two stainless steel cooling tubes 30 and a body of copper, with the cooling tubes 30 disposed within and compressed with the respective body.
- seawater is also pumped through the cooling pipes 30, which are likewise running parallel to the axis of the coil winding 2, and in this way heat is removed from the choke coil 4.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Die Erfindung betrifft eine Drosselspule (4) eines Stromrichters, mit einer hohlzylindrischen Spulenwicklung (2), an deren Deckfläche (24) eine Kühlplatte (16) thermisch angebunden ist.The invention relates to a choke coil (4) of a power converter, with a hollow cylindrical coil winding (2), on whose top surface (24) a cooling plate (16) is thermally connected.
Description
Die Erfindung betrifft eine Drosselspule eines Stromrichters mit einer Spulenwicklung.The invention relates to a choke coil of a power converter with a coil winding.
Mittels Drosselspulen wird der Anteil von vergleichsweise hohen Frequenzen innerhalb von elektrischen Strömen reduziert. Derartige hochfrequente Ströme treten beispielsweise bei Stromrichtern auf, wobei die Betätigung eines Halbleiterschalters zu vergleichsweise hochfrequenten Oberschwingungen innerhalb des geschaltenen Stroms führt. Daher wird eine derartige Drosselspule in den den hochfrequenten Strom führenden Leitern eingebracht. Drosselspulen weisen üblicherweise eine niederohmigen Spulenwicklung mit einer definierten Induktivität auf. Infolgedessen ist der Widerstand der Drosselspule frequenzabhängig, wobei bei der Abwesenheit einer Oberschwingung der ohmsche Widerstand vergleichsweise gering ist.By means of inductors, the proportion of comparatively high frequencies is reduced within electrical currents. Such high-frequency currents occur, for example, in converters, wherein the operation of a semiconductor switch leads to comparatively high-frequency harmonics within the switched current. Therefore, such a reactor is incorporated in the high-frequency current-carrying conductors. Reactive coils usually have a low-resistance coil winding with a defined inductance. As a result, the resistance of the choke coil is frequency-dependent, wherein in the absence of a harmonic of the ohmic resistance is comparatively low.
Bei hohen elektrischen Strömen ist die mittels der Drosselspule erzeugte thermische Verlustleistung nicht zu vernachlässigen. Um ein Versagen der Drosselspule oder auch eine Zunahme des Widerstands aufgrund der thermischen Belastung zu vermeiden, ist es erforderlich, die Drosselspule zu kühlen. So ist es aus der
Der Erfindung liegt die Aufgabe zugrunde, eine besonders geeignete Drosselspule anzugeben, die insbesondere vergleichsweise sicher und/oder mittels eines vergleichsweise chemisch aggressiven Kühlmediums betrieben werden kann, und die vorzugsweise für maritime Anwendungen geeignet ist.The invention has for its object to provide a particularly suitable inductor, which can be operated in particular relatively safe and / or by means of a comparatively chemically aggressive cooling medium, and which is preferably suitable for maritime applications.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 und unabhängig hiervon durch die Merkmale des Anspruchs 10 gelöst. Vorteilhafte Weiterbildungen und Ausgestaltungen sind Gegenstand der jeweiligen Unteransprüche.This object is achieved by the features of claim 1 and independently thereof by the features of
Die Drosselspule ist Bestandteil eines Stromrichters, mittels dessen bevorzugt eine Gleichspannung erstellt wird. Vorzugsweise befindet sich hierbei die Drosselspule auf der Gleichstromseite eines derartigen Stromrichters. Der Stromrichter selbst ist beispielsweise Bestandteil eines Schiffs und dient dem Betrieb eines Nebenaggregats oder eines Elektromotors, mittels dessen das Schiff bewegt wird. Beispielsweise ist der Elektromotor Bestandteil eines Bugstrahlruders. Die Drosselspule ist zum Beispiel vorgesehen und eingerichtet bei einer elektrischen Spannung über 500 V, 600 V und bis zu 1000 V oder 2000 V sicher betrieben werden zu können. Beispielsweise ist die Stromtragfähigkeit der Drosselspule größer als 100 A, 120 A, 200 A, 300 A, 500 A, 1000 A oder 1500 A. Zum Beispiel ist die Stromtragfähigkeit kleiner als 180 A, 200 A, 500 A, 1000 A oder 2000 A.The choke coil is part of a power converter, by means of which preferably a DC voltage is created. Preferably, in this case, the choke coil is located on the DC side of such a converter. The power converter itself is, for example, part of a ship and serves to operate an accessory or an electric motor, by means of which the ship is moved. For example, the electric motor is part of a bow thruster. The choke coil is for example provided and set up to be operated safely at an electrical voltage of more than 500 V, 600 V and up to 1000 V or 2000 V. For example, the current carrying capacity of the choke coil is greater than 100 A, 120 A, 200 A, 300 A, 500 A, 1000 A or 1500 A. For example, the current carrying capacity is less than 180 A, 200 A, 500 A, 1000 A or 2000 A. ,
Die Drosselspule weist eine hohlzylindrische Spulenwicklung auf, die beispielsweise aus einem isolierten Lackdraht erstellt ist. Alternativ hierzu ist die Wicklung aus einem Leiterband erstellt, dessen Breite beispielsweise kleiner als 10cm, 15cm, 25cm, 35cm, 40cm, 50cm und insbesondere kleiner als 60cm ist. Geeigneterweise ist die Breite größer als 1cm, 2cm, 5cm, 10cm, 15cm, 25cm, 30cm, 35cm oder40 cm. Zweckmäßigerweise ist Breite gleich 19 cm. Die Breite bezeichnet hierbei die Ausdehnung des Bandes parallel zur Achse der hohlzylindrischen Spulenwicklung. Die Dicke des Bandes ist hierbei auf die entsprechende Stromtragfähigkeit abgestimmt. Beispielsweise ist das Material des Leiters, also insbesondere des Bandes oder des Drahtes, aus einem Kupfer oder einem Aluminium erstellt, enthält also folglich Kupfer oder Aluminium. Mit anderen Worten handelt es sich entweder um reines Kupfer bzw. Aluminium oder eine diese Elemente enthaltenden Legierung. Vorzugsweise ist der Leiter aus einem Vollmaterial erstellt. Geeigneterweise ist die Spulenwicklung aus einem eloxierten Aluminiumband gewickelt.The choke coil has a hollow cylindrical coil winding, which is made for example of an insulated enameled wire. Alternatively, the winding is made of a conductor strip whose width is, for example, less than 10cm, 15cm, 25cm, 35cm, 40cm, 50cm and especially less than 60cm. Suitably the width is greater than 1cm, 2cm, 5cm, 10cm, 15cm, 25cm, 30cm, 35cm or 40cm. Conveniently, width is equal to 19 cm. The width here denotes the extension of the strip parallel to the axis of the hollow cylindrical coil winding. The thickness of the band is matched to the corresponding current carrying capacity. For example, the material of the conductor, ie in particular the band or the wire, made of a copper or an aluminum, thus containing copper or aluminum. In other words, it is either pure copper or aluminum or an alloy containing these elements. Preferably, the conductor is made of a solid material. Suitably, the coil winding is wound from an anodized aluminum strip.
Die Spulenwicklung ist nach Art eines Hohlzylinders geformt, erstreckt sich also folglich entlang einer Achse und weist somit zwei Deckflächen auf, auch als Grundflächen bezeichnet, die senkrecht zur Achse sind und die Begrenzung der Spulenwicklung entlang der Achse bilden. Beispielsweise ist der Querschnitt der Spulenwicklung senkrecht zur Achse ringförmig oder nach Art eines Rechtecks gestaltet, wobei die Ecken vorzugsweise abgerundet sind, was zu einer verringerten Materialbelastung führt. Beispielsweise ist die Spulenwicklung mittels einer einzigen Lage des zur Bildung herangezogenen Leiters gebildet, oder mehrere Wicklungen sind lagenartig übereinander gestapelt, wobei die einzelnen Lagen insbesondere in direktem mechanischen Kontakt sind, was zu einer erhöhten Stabilität und zu einer verringerten Größe führt.The coil winding is shaped in the manner of a hollow cylinder, thus consequently extends along an axis and thus has two cover surfaces, also referred to as base surfaces, which are perpendicular to the axis and form the boundary of the coil winding along the axis. For example, the cross section of the coil winding is designed to be annular or in the manner of a rectangle perpendicular to the axis, wherein the corners are preferably rounded, which leads to a reduced material load. For example, the coil winding is formed by means of a single layer of the conductor used for formation, or a plurality of windings are stacked in layers, wherein the individual layers are in particular in direct mechanical contact, resulting in increased stability and reduced size.
Die Drosselspule weist ferner eine Kühlplatte auf, die an einer der Deckflächen der Spulenwicklung thermisch angebunden ist. Zweckmäßigerweise ist die Kühlplatte an der Spulenwicklung befestigt. Bei Betrieb bildet die Kühlplatte eine Wärmesenke gegenüber der Spulenwicklung. Insbesondere ist die Kühlplatte senkrecht zur Achse der Spulenwicklung angeordnet und vorzugsweise im mechanischen Kontakt mit der Spulenwicklung, wobei dies zum Beispiel vollflächig entlang der Deckfläche erfolgt. Die Kühlplatte weist ihrerseits beispielsweise auf der der Spulenwicklung abgewandten Seite Kühlrippen oder dergleichen auf, um die von der Spulenwicklung aufgenommene Wärme an eine Umgebung abzuleiten.The choke coil further has a cooling plate, which is thermally connected to one of the top surfaces of the coil winding. Conveniently, the cooling plate is attached to the coil winding. In operation, the cooling plate forms a heat sink opposite the coil winding. In particular, the cooling plate is arranged perpendicular to the axis of the coil winding and preferably in mechanical contact with the coil winding, which takes place, for example, over the entire surface along the top surface. The cooling plate, in turn, for example on the side facing away from the coil winding cooling fins or the like, in order to derive the heat absorbed by the coil winding to an environment.
Aufgrund der Kühlplatte ist ein Betrieb der Drosselspule auch bei vergleichsweise hohen Außentemperaturen möglich. Hierbei ist es möglich, die Spulenwicklung auf eine vergleichsweise hohe Stromtragfähigkeit hin zu optimieren, wohingegen eine Optimierung der Kühlplatte auf eine vergleichsweise effiziente Wärmeabfuhr erfolgen kann. Beispielsweise ist die Kühlplatte resistent gegen Meerwasser ausgebildet, so dass die Kühlplatte mittels vergleichsweise aggressivem Meerwasser gekühlt werden kann, das anderweitig die Spulenwicklung beschädigen würde.Due to the cooling plate operation of the inductor is possible even at relatively high outside temperatures. In this case, it is possible to optimize the coil winding to a comparatively high current carrying capacity, whereas an optimization of the cooling plate can be carried out on a comparatively efficient heat dissipation. For example, the cooling plate is made resistant to seawater, so that the Cooling plate can be cooled by means of relatively aggressive seawater, which would otherwise damage the coil winding.
Geeigneterweise weist die Drosselspule einen Kern auf, der innerhalb der Spulenwicklung angeordnet ist. Der Kern besteht beispielsweise aus einem weichmagnetischen Material und insbesondere aus Eisen. Zweckmäßigerweise verläuft der Kern entlang der Achse der hohlzylindrischen Spulenwicklung und/oder ist mittig innerhalb der Spulenwicklung angeordnet. Beispielsweise sind Abstandshalter zwischen dem Kern und der Spulenwicklung angeordnet, mittels derer ein direkter mechanischer Kontakt zwischen dem Kern und der Wicklung vermieden wird. Alternativ hierzu liegt der Kern beispielsweise im Wesentlichen vollständig an der Innenwand der Spulenwicklung an, wobei sich zweckmäßigerweise zwischen diesen eine elektrisch isolierende Schicht befindet. Geeigneterweise ist auch der Kern thermisch mit der Kühlplatte kontaktiert, sodass bei Betrieb auch Wärme von dem Kern auf die Kühlplatte übertragen wird. Aufgrund der Verwendung eines Kerns ist es ermöglicht, die Induktivität der Drosselspule zu erhöhen, so dass eine Filterwirkung mittels der Drosselspule verbessert ist.Suitably, the choke coil has a core disposed within the coil winding. The core consists for example of a soft magnetic material and in particular of iron. Expediently, the core runs along the axis of the hollow-cylindrical coil winding and / or is arranged centrally within the coil winding. For example, spacers are arranged between the core and the coil winding, by means of which a direct mechanical contact between the core and the winding is avoided. Alternatively, the core, for example, lies substantially completely against the inner wall of the coil winding, wherein an electrically insulating layer is expediently located between these. Suitably, the core is also thermally contacted with the cooling plate so that, in use, heat is also transferred from the core to the cooling plate. Due to the use of a core, it is possible to increase the inductance of the choke coil, so that a filtering effect by means of the choke coil is improved.
Beispielsweise weist der Kern eine Quaderform auf. Vorzugsweise jedoch ist der Querschnitt des Kerns senkrecht zur Achse der Spulenwicklung rund, wobei der Querschnitt der Spulenwicklung ringförmig ist. Auf diese Weise ist eine Materialbeanspruchung der Spulenwicklung im Bereich etwaiger Kanten des Kerns ausgeschlossen, die zu einer Materialermüdung oder anderweitigen Beschädigung führen könnten. Zudem ist, sofern die Spulenwicklung eine Anzahl von Lagen aufweist, ein Lufteinschluss zwischen einzelnen Lagen ausgeschlossen.For example, the core has a cuboid shape. Preferably, however, the cross section of the core is perpendicular to the axis of the coil winding, wherein the cross section of the coil winding is annular. In this way, a material stress of the coil winding in the region of any edges of the core is excluded, which could lead to material fatigue or otherwise damage. In addition, if the coil winding has a number of layers, air inclusion between individual layers is excluded.
Geeigneterweise umfasst der Kern ein Kühlrohr, durch das bei Betrieb der Drosselspule zweckmäßigerweise ein Fluid geleitet wird. Auf diese Weise ist ein Wärmeabtransport von auf den Kern übertragener Wärme ermöglicht. Zweckmäßigerweise wird eine Kühlflüssigkeit verwendet, was den Wärmeabtransport erleichtert. Vorzugsweise weist das Kühlrohr geeignete Anschlüsse für einen derartigen Kühlkreislauf auf. Geeigneterweise ist das Kühlrohr aus einem Edelstahl oder CuNiFe gefertigt. Beispielsweise wird Stahl der Stahlklassen 4 oder aufwärts verwendet. Vorzugsweise ist das Kühlrohr aus austenitischen Stahl 1.4529 oder 1.4562 oder aus Superduplexstahl 1.4410 gefertigt. Auf diese Weise können auch vergleichsweise aggressive Kühlflüssigkeiten, wie zum Beispiel Meerwasser, verwendet werden. Geeigneterweise ist das Kühlrohr gerade und nach Art eines Hohlzylinders geformt und weist beispielsweise einen ringförmigen Querschnitt auf. Insbesondere ist das Kühlrohr parallel zur Achse der Spulenwicklung ausgerichtet, was eine Montage erleichtert. Vorzugsweise umfasst der Kern einen Kernkörper innerhalb dessen sich das Kühlrohr befindet. Der Kernkörper ist zweckmäßigerweise aus Eisen erstellt. Insbesondere sind der Kernkörper und das Kühlrohr miteinander verpresst. Hierbei ist das Kühlrohr zweckmäßigerweise mittig des Kernkörpers und insbesondere punktsymmetrisch bezüglich der Achse der Spulenwicklung positioniert. Auf diese Weise ist eine Ausbildung von unterschiedlichen Temperaturniveaus innerhalb des Kerns und/oder der Spulenwicklung im Wesentlichen ausgeschlossen.Suitably, the core comprises a cooling tube, through which a fluid is expediently conducted during operation of the choke coil. In this way, a heat transfer of transferred to the core heat is possible. Appropriately, a cooling liquid is used, which facilitates the heat dissipation. The cooling tube preferably has suitable connections for such a cooling circuit. Conveniently, the cooling tube is made of a stainless steel or CuNiFe. For example, steel of
Beispielsweise entspricht die Außenkontur der Kühlplatte der Außenkontur der Spulenwicklung. Zweckmäßigerweise fluchtet die Kühlplatte mit der Spulenwicklung, so dass die Drosselspule vergleichsweise kompakt ist. Alternativ hierzu ist der Querschnitt der Kühlplatte größer als der Querschnitt der Spulenwicklung. Mit anderen Worten steht bei der Projektion der Spulenwicklung und der Kühlplatte auf eine Ebene parallel zur Deckfläche der Spulenwicklung die Kühlplatte zumindest zu einer Seite der Spulenwicklung über. Folglich weist die Kühlplatte ein vergleichsweise großes Volumen auf, was den Wärmetransport verbessert. Insbesondere ist die Kühlplatte zur Bildung einer Vertiefung ausgespart. Die Vertiefung ist hierbei nach Art eines Topfes geformt und weist einen Boden auf. Mit anderen Worten ist die Kühlplatte im Bereich der Vertiefung zumindest nicht vollständig geöffnet. Innerhalb der Vertiefung ist die Spulenwicklung zumindest teilweise angeordnet. Auf diese Weise ist die Spulenwicklung bezüglich der Kühlplatte stabilisiert und die Drosselspule vergleichsweise robust.For example, the outer contour of the cooling plate corresponds to the outer contour of the coil winding. Conveniently, the cooling plate is aligned with the coil winding, so that the choke coil is comparatively compact. Alternatively, the cross section of the cooling plate is larger than the cross section of the coil winding. In other words, in the projection of the coil winding and the cooling plate on a plane parallel to the top surface of the coil winding, the cooling plate is at least on one side of the coil winding. Consequently, the cooling plate has a comparatively large volume, which improves the heat transfer. In particular, the cooling plate is recessed to form a recess. The recess is shaped in the manner of a pot and has a bottom. In other words, the cooling plate is at least not fully opened in the region of the depression. Inside the recess the coil winding is at least partially arranged. In this way, the coil winding is stabilized with respect to the cooling plate and the inductor comparatively robust.
Geeigneterweise ist die Kühlplatte elektrisch gegenüber der Spulenwicklung isoliert. Vorzugsweise wird hierfür eine elektrisch isolierende Schicht herangezogen. Auf diese Weise ist ein Kurzschluss innerhalb der Drosselspule ausgeschlossen. Zweckmäßigerweise wird als elektrisch isolierende Schicht eine Wärmeleitfolie herangezogen, die zweckmäßigerweise aus einem aromatischen Polyimid erstellt ist. Insbesondere besteht die Wärmeleitfolie aus Kapton® oder enthält dieses zumindest. Alternativ besteht die Wärmeleitfolie aus einem Aramid, insbesondere aus einem Aramid-Papier. Beispielsweise besteht Wärmeleitfolie aus NOMEX®. Geeigneterweise wird eine Wärmeleitpaste oder dergleichen (z.B. elektrisch isolierendes Thermal Interface Material) zur Erstellung der Wärmeleitfolie herangezogen. Beispielsweise ist die Wärmeleitfolie aus einem Silikon gebildet. Folglich ist es ermöglicht, die Kühlplatte aus einem elektrisch leitenden Material herzustellen, das vergleichsweise gute Wärmeleiteigenschaften aufweist, wobei ein elektrischer Kurzschluss ausgeschlossen ist.Suitably, the cooling plate is electrically isolated from the coil winding. Preferably, an electrically insulating layer is used for this purpose. In this way, a short circuit within the choke coil is excluded. Conveniently, a heat-conducting foil which is expediently made from an aromatic polyimide is used as the electrically insulating layer. In particular, the Wärmeleitfolie Kapton® or contains this at least. Alternatively, the heat-conducting film consists of an aramid, in particular of an aramid paper. For example, heat-conducting foil is made of NOMEX®. Conveniently, a thermal grease or the like (e.g., electrically insulating thermal interface material) is used to form the thermal pad. For example, the heat-conducting foil is formed from a silicone. Consequently, it is possible to make the cooling plate of an electrically conductive material having comparatively good heat conduction properties, excluding an electric short circuit.
Zweckmäßigerweise ist die Kühlplatte aus Aluminium gefertigt, was zu einem verringerten Gewicht der Drosselspule führt. Alternativ besteht die Kühlplatte aus Kupfer oder einer Kupferlegierung, was die Wärmeleiteigenschaften der Kühlplatte erhöht. Alternativ hierzu ist die Kühlplatte aus einem Edelstahl oder CuNiFe gefertigt. Beispielsweise wird Stahl der Stahlklassen 4 oder aufwärts verwendet. Vorzugsweise ist die Kühlplatte aus austenitischen Stahl 1.4529 oder 1.4562 oder aus Superduplexstahl 1.4410 gefertigt. Auf diese Weise ist auch eine Kühlung der Kühlplatte mittels vergleichsweise aggressiver Medien, wie zum Beispiel Meerwasser, ermöglicht.Conveniently, the cooling plate is made of aluminum, which leads to a reduced weight of the inductor. Alternatively, the cooling plate is made of copper or a copper alloy, which increases the heat conduction properties of the cooling plate. Alternatively, the cooling plate is made of a stainless steel or CuNiFe. For example, steel of
Vorzugsweise weist die Kühlplatte ein Kühlrohr auf, insbesondere eine Anzahl von Kühlrohren. Bei Betrieb der Drosselspulen wird durch das Kühlrohr ein Fluid geleitet, sodass das Fluid Wärme von der Kühlplatte aufnimmt und folglich abtransportiert. Insbesondere ist das Kühlrohr innerhalb eines Körpers der Kühlplatte angeordnet und vorzugsweise innerhalb des Körpers verpresst, was einerseits zu einer vergleichsweise effizienten thermischen Anbindung und andererseits zu einer robusten mechanischen Verbindung zwischen diesen führt. Besonders bevorzugt ist das Kühlrohr aus Edelstahl oder CuNiFe erstellt, was die chemische Robustheit der Kühlplatte erhöht. Beispielsweise wird Stahl der Stahlklassen 4 oder aufwärts verwendet. Vorzugsweise ist das Kühlrohr aus austenitischen Stahl 1.4529 oder 1.4562 oder aus Superduplexstahl 1.4410 gefertigt. Zweckmäßigerweise wird Meerwasser als Fluid durch das Kühlrohr geleitete, sofern die Drosselspule auf einem Schiff oder in Küstennähe eingesetzt wird. Auf diese Weise sind die Betriebskosten der Drosselspule verringert. Insbesondere ist das Kühlrohr gerade ausgestaltet, so dass die Fertigungskosten der Kühlplatte reduziert sind.The cooling plate preferably has a cooling tube, in particular a number of cooling tubes. During operation of the choke coils A fluid is passed through the cooling tube, so that the fluid absorbs heat from the cooling plate and thus transported away. In particular, the cooling tube is disposed within a body of the cooling plate and preferably compressed within the body, which on the one hand leads to a comparatively efficient thermal connection and on the other hand to a robust mechanical connection between them. Particularly preferably, the cooling tube is made of stainless steel or CuNiFe, which increases the chemical robustness of the cooling plate. For example, steel of
Zweckmäßigerweise wird die Kühlplatte mit der Spulenwicklung vergossen. Mit anderen Worten wird die Kühlplatte mit der Spulenwicklung mittels einer Vergussmasse verbunden, was die Robustheit der Drosselspule erhöht. Alternativ hierzu ist die Kühlplatte mittels eines thermisch leitfähigen Klebers an der Spulenwicklung angebunden. Bei der Fertigung wird hierbei bis zur Aushärtung des Klebers bzw. der Vergussmasse ein Druck auf die Kühlplatte in Richtung der Spulenwicklung ausgeübt, was die thermische Anbindung verbessert. Alternativ ist die Kühlplatte mittels eines sog. Thermal Interface Materials an der Spulenwicklung angebunden, welches eine hohe Wärmeleitfähigkeit, sowie eine Flexibilität aufweist, und beispielsweise aus einem Silikon gefertigt ist.Conveniently, the cooling plate is cast with the coil winding. In other words, the cooling plate is connected to the coil winding by means of a potting compound, which increases the robustness of the choke coil. Alternatively, the cooling plate is connected by means of a thermally conductive adhesive to the coil winding. During manufacture, pressure is exerted on the cooling plate in the direction of the coil winding until the adhesive or potting compound hardens, which improves the thermal connection. Alternatively, the cooling plate is connected by means of a so-called. Thermal interface material to the coil winding, which has a high thermal conductivity, as well as a flexibility, and is made for example of a silicone.
Geeigneterweise weist die Drosselspule eine weitere Platte auf, wobei die Spulenwicklung zwischen dieser Platte und der Kühlplatte angeordnet ist. Insbesondere sind die beiden Platten in mechanischem Kontakt mit der Spulenwicklung, entweder direkt oder beispielsweise über eine elektrisch isolierende Schicht. Auf diese Weise ist die Spulenwicklung einerseits vor Beschädigungen geschützt. Besonders bevorzugt ist die Platte als Kühlplatte ausgestaltet, sodass die Drosselspule zwei Kühlplatten aufweist. Hierbei ist jeweils eine der Kühlplatten genau einer der beiden Deckflächen der Spulenwicklung zugeordnet. Mit anderen Worten ist jede der Deckflächen der Spulenwicklung thermisch an jeweils einer der Kühlplatten angebunden. Folglich ist ein Wärmeabtransport von der Spulenwicklung verbessert. Beispielsweise sind die beiden Kühlplatten gleichartig ausgestaltet, weisen also folglich die gleichen Weiterbildungen auf, sofern diese vorhanden sind. Alternativ hierzu ist eine der Kühlplatte gemäß einer der Fortbildungen weitergebildet, wohingegen die andere nicht weitergebildet oder gemäß einer anderen Variante ausgestaltet ist. Beispielsweise weist lediglich eine der Kühlplatten das Kühlrohr und zum Beispiel die verbleibende Kühlplatte die Vertiefung auf. Auf diese Weise ist es ermöglicht, eine der Kühlplatten auf eine verbesserte Stabilität der Drosselspule und die verbleibende Kühlplatte auf eine erhöhte Kühlleistung hin zu optimieren.Suitably, the choke coil has a further plate, wherein the coil winding is arranged between this plate and the cooling plate. In particular, the two plates are in mechanical contact with the coil winding, either directly or for example via an electrically insulating Layer. In this way, the coil winding is on the one hand protected from damage. Particularly preferably, the plate is designed as a cooling plate, so that the choke coil has two cooling plates. Here, one of the cooling plates is assigned to exactly one of the two top surfaces of the coil winding. In other words, each of the top surfaces of the coil winding is thermally connected to each one of the cooling plates. As a result, heat dissipation from the coil winding is improved. For example, the two cooling plates are configured identically, thus therefore have the same developments, if they are available. Alternatively, one of the cooling plate is further developed according to one of the training, whereas the other is not developed or designed according to another variant. For example, only one of the cooling plates on the cooling tube and, for example, the remaining cooling plate on the recess. In this way it is possible to optimize one of the cooling plates for improved reactor stability and the remaining cooling plate for increased cooling performance.
Geeigneterweise weist hierbei die Drosselspule eine zweite hohlzylindrische Spulenwicklung auf, die beispielsweise gleichartig zu der bereits vorhandenen Spulenwicklung ist. Die beiden Spulenwicklungen sind elektrisch miteinander kontaktiert und zweckmäßigerweise in Reihe geschalten. Zwischen den beiden Spulenwicklungen ist die zweite Kühlplatte angeordnet, wobei die beiden Spulenwicklungen zweckmäßigerweise thermisch an der zweiten Kühlplatte angebunden sind. Folglich dient die zweite Kühlplatte der Kühlung der beiden Spulenwicklungen. Geeigneterweise sind die beiden Spulenwicklungen auch mechanisch in Kontakt mit der zweiten Kühlplatte und zweckmäßigerweise an dieser befestigt. Der Kontakt erfolgt beispielsweise direkt oder mittels einer elektrisch isolierenden, jedoch wärmeleitenden Schicht. Insbesondere sind die beiden Spulenwicklungen mit der zweiten Kühlplatte verklebt, mittels eines Thermal Interface Materials verbunden oder vergossen, was die Robustheit der Drosselspule erhöht. Geeigneterweise liegen die Achsen der beiden Spulenwicklung auf einer gemeinsamen Geraden. Mit anderen Worten sind die beiden Spulenwicklungen in die gleiche Richtung orientiert. Sofern die Drosselspule einen Kern aufweist, ist dieser zweckmäßigerweise innerhalb beider Spulenwicklungen angeordnet. Insbesondere weist hierfür die zweite Kühlplatte eine Aussparung auf, durch die der Kern ragt. Die Länge des Kerns ist hierbei vorzugsweise größer als die Summe der Ausdehnung der beiden Spulenwicklungen entlang deren gemeinsamer Achse. Auf diese Weise ist einerseits die Robustheit der Drosselspule und andererseits die elektrischen Eigenschaften der Drosselspule verbessert. Insbesondere umfasst die Drosselspule ein Zwei-, Drei- oder Vielfaches hiervon an derartigen zweiten hohlzylindrischen Spulenwicklungen.Suitably, in this case, the choke coil has a second hollow-cylindrical coil winding, which is, for example, similar to the already existing coil winding. The two coil windings are electrically contacted with each other and suitably connected in series. Between the two coil windings, the second cooling plate is arranged, wherein the two coil windings are suitably connected thermally to the second cooling plate. Consequently, the second cooling plate serves to cool the two coil windings. Suitably, the two coil windings are also mechanically in contact with the second cooling plate and suitably attached thereto. The contact is made, for example, directly or by means of an electrically insulating, but thermally conductive layer. In particular, the two coil windings are glued to the second cooling plate, connected or sealed by means of a thermal interface material, which increases the robustness of the choke coil. suitably the axes of the two coil windings lie on a common straight line. In other words, the two coil windings are oriented in the same direction. If the choke coil has a core, this is expediently arranged within both coil windings. In particular, for this purpose, the second cooling plate has a recess through which the core protrudes. The length of the core is in this case preferably greater than the sum of the extent of the two coil windings along their common axis. In this way, on the one hand, the robustness of the choke coil and, on the other hand, the electrical properties of the choke coil are improved. In particular, the choke coil comprises a two-, three- or multiple thereof on such second hollow-cylindrical coil windings.
In einer alternativen Ausführungsform der Erfindung umfasst die Drosselspule die zweite hohlzylindrische Spulenwicklung, wobei an einer deren Deckflächen die Kühlplatte thermisch angebunden ist. Hierbei befinden sich die beiden Spulenwicklungen auf der gleichen Seite der Kühlplatte. Insbesondere sind die beiden Deckflächen der jeweiligen Spulenwicklungen in einer Ebene. Mit anderen Worten verlaufen die beiden Spulenwicklungen parallel zueinander. Vorzugsweise sind die beiden Spulenwicklungen gleichartig aufgebaut, weisen also folglich den gleichen Aufbau und insbesondere die gleichen Abmessungen auf, was eine Lagerhaltung bei der Herstellung der Drosselspule reduziert. Beispielsweise sind drei derartige Spulenwicklungen Bestandteil der Drosselspule, wobei jeder der Drosselspulen einer Phase eines dreiphasigen Stroms zugeordnet ist. Auf diese Weise ist es ermöglicht, mittels der Drosselspule einen elektrisch kommutierenden Elektromotor zu betreiben.In an alternative embodiment of the invention, the choke coil comprises the second hollow-cylindrical coil winding, wherein the cooling plate is thermally connected to one of its cover surfaces. In this case, the two coil windings are located on the same side of the cooling plate. In particular, the two cover surfaces of the respective coil windings are in one plane. In other words, the two coil windings run parallel to one another. Preferably, the two coil windings are of similar construction, and therefore have the same structure and in particular the same dimensions, which reduces storage in the production of the inductance coil. For example, three such coil windings are part of the choke coil, wherein each of the choke coils is associated with a phase of a three-phase current. In this way it is possible to operate by means of the choke coil an electrically commutating electric motor.
Zweckmäßigerweise sind hierbei die Spulenwicklungen mittels Kunststoff eingefasst, was zu verringerten Kosten bei der Herstellung führt. Geeigneterweise ist der Kunststoff salzwasserbeständig. Zweckmäßigerweise umfasst die Drosselspule einen Verteiler für die Kühlplatten, der insbesondere aus einem Kunststoff gefertigt ist. Mittels des Verteilers werden die einzelnen Kühlrohre mit einem Kühlmedium versorgt. Alternativ ist der Verteiler aus einer meerwasserbeständigen Legierung gefertigt. Unter Verteiler wird insbesondere ein Knotenpunkt der einzelnen Kühlrohre verstanden, der dient beispielsweise dem Zuteilen eines Kühlmittelstroms auf die einzelnen Kühlrohre oder einem Sammeln von Kühlmittel dient, das durch die einzelnen Kühlrohre geleitet wurde. Beispielsweise weist jede der Spulenwicklungen einen Kern auf, die insbesondere mittels eines Jochs magnetisch kurzgeschlossen sind, das vorzugsweise parallel zur Kühlplatte ist. Hierbei befindet sich das Joch zweckmäßigerweise auf einer der Seiten der Kühlplatte, wohingegen die Spulenwicklungen sich der gegenüberliegenden Seite befinden. Beispielsweise weist hierfür die Kühlplatte entsprechende Ausnehmungen auf, durch die die Kerne des Kern-Joch-Verbunds geführt sind. Alternativ hierzu ist die Kühlplatte frei von jeglichen Ausnehmungen und beispielsweise nach Art eines Rechtecks geformt. Hierbei weist eine der Kanten der Kühlplatte zu den beiden Kernen und ist geeigneterweise mit diesen in mechanischem Kontakt. Insbesondere ist die Kühlplatte an den beiden Kernen thermisch angebunden, so dass auch Wärme von den beiden Kernen zur Kühlplatte geführt wird.Appropriately, in this case the coil windings are enclosed by plastic, which leads to reduced costs in the production. Suitably, the plastic is salt water resistant. Conveniently, the choke coil comprises a distributor for the cooling plates, in particular of a Plastic is made. By means of the distributor, the individual cooling tubes are supplied with a cooling medium. Alternatively, the distributor is made of a seawater-resistant alloy. Distributor is understood in particular a node of the individual cooling tubes, which serves, for example, the allocation of a coolant flow to the individual cooling tubes or a collection of coolant, which was passed through the individual cooling tubes. For example, each of the coil windings has a core which is in particular magnetically short-circuited by means of a yoke, which is preferably parallel to the cooling plate. In this case, the yoke is expediently located on one of the sides of the cooling plate, whereas the coil windings are located on the opposite side. For example, for this purpose, the cooling plate corresponding recesses through which the cores of the core-yoke composite are guided. Alternatively, the cooling plate is free of any recesses and shaped, for example, in the manner of a rectangle. Here, one of the edges of the cooling plate faces the two cores and is suitably in mechanical contact therewith. In particular, the cooling plate is thermally connected to the two cores, so that heat is also conducted from the two cores to the cooling plate.
Zweckmäßigerweise ist der Verbund aus den beiden Kernen und dem Joch einstückig, was die Stabilität erhöht und die elektrischen Eigenschaften verbessert. Vorzugsweise ist hierbei der Verbund U-förmig oder, falls weitere Spulen vorhanden sind, M-förmig bzw. kamm-förmig ausgestaltet. Beispielsweise ist hierbei jeder der Spulenwicklungen eine Kühlplatte zugeordnet, wobei die Kühlplatten insbesondere in einer Ebene liegen, die sich zwischen dem Joch und den Spulenwicklungen befindet. Beispielsweise ist der Querschnitt jeder der Kühlplatten gleich dem der jeweils zugeordneten Spulenwicklung. Auf diese Weise ist es ermöglicht, den Verbund aus Spulenwicklung und Kühlplatte vor Montage des Kernjochverbunds zu fertigen. Alternativ hierzu ist jede der Kühlplatten im Wesentlichen rechteckförmig ausgestaltet, wobei jede der Rechteckformen parallel zur jeweiligen Deckfläche der zugeordneten Spulenwicklung ist. Hierbei sind die Kühlplatten geeigneterweise senkrecht zu dem Joch angeordnet, was diese stabilisiert. Insbesondere ist ein Kraftschluss zwischen dem Joch und jeder der Spulenwicklungen über die jeweiligen Kühlplatten erstellt. Vorzugsweise sind jeder der Spulenwicklungen zwei Kühlplatten zugeordnet, die mittels des jeweiligen Kerns voneinander getrennt sind.Conveniently, the composite of the two cores and the yoke is in one piece, which increases the stability and improves the electrical properties. In this case, the composite is preferably U-shaped or, if further coils are present, M-shaped or comb-shaped. For example, in this case each of the coil windings is associated with a cooling plate, wherein the cooling plates are in particular in a plane which is located between the yoke and the coil windings. For example, the cross section of each of the cooling plates is equal to that of the respectively associated coil winding. In this way it is possible to manufacture the composite coil winding and cooling plate before assembly of Kernjochverbunds. Alternatively, each of the cooling plates is configured substantially rectangular, with each of the rectangular shapes is parallel to the respective top surface of the associated coil winding. Here, the cooling plates are suitably arranged perpendicular to the yoke, which stabilizes them. In particular, a frictional connection between the yoke and each of the coil windings on the respective cooling plates is created. Preferably, each of the coil windings associated with two cooling plates, which are separated from each other by means of the respective core.
Eine weitere Ausgestaltung der Drosselspulen des Stromrichters weist eine hohlzylindrische Spulenwicklung auf, die zweckmäßigerweise aus einem isolierten Leiter erstellt ist. Der isolierte Leiter ist insbesondere ein Lackdraht oder ein bandförmiger Leiter, der insbesondere eine Breite zwischen 10 cm und 60 cm, und z.B. von 19 cm aufweist. Hierbei ist die Breite des Leiters parallel zur Achse der Spulenwicklung. Das Material des elektrischen Leiters ist beispielsweise Aluminium oder Kupfer, und der Leiter ist zu der Spulenwicklung gewickelt. Die Spulenwicklung weist eine oder mehr Lagen auf. Innerhalb der Spulenwicklung ist ein quaderförmiger Kern angeordnet, der insbesondere aus einem weichmagnetischen Material und zum Beispiel aus Eisen gefertigt ist. Geeigneterweise ist die Spulenwicklung aus einem eloxierten Aluminiumband gewickelt.A further embodiment of the choke coils of the power converter has a hollow-cylindrical coil winding, which is expediently created from an insulated conductor. The insulated conductor is in particular an enameled wire or a ribbon-shaped conductor, which in particular has a width between 10 cm and 60 cm, and e.g. of 19 cm. Here, the width of the conductor is parallel to the axis of the coil winding. The material of the electrical conductor is, for example, aluminum or copper, and the conductor is wound to the coil winding. The coil winding has one or more layers. Within the coil winding a cuboid core is arranged, which is made in particular of a soft magnetic material and, for example, iron. Suitably, the coil winding is wound from an anodized aluminum strip.
Die sich innerhalb der Spulenwicklung befindenden Kanten des Kerns sind zumindest abschnittsweise mittels L-förmigen Abstandshaltern versehen. Mit anderen Worten ist jede der Kanten zumindest abschnittsweise von einem der Abstandshalter umgeben. Geeigneterweise sind die Abstandshalter aus einem Kunststoff erstellt, und jeder der Abstandshalter ist vorzugsweise in mechanischem Kontakt mit der Spulenwicklung, die insbesondere einen rechteckförmigen Querschnitt aufweist. Aufgrund der Abstandshalter ist der Kern von der Spulenwicklung beabstandet, was einerseits einen elektrischen Kurzschluss verhindert und andererseits eine Beschädigung der Spulenwicklung aufgrund der vergleichsweise scharfen Kanten des Kerns unterbindet.The edges of the core located within the coil winding are provided at least in sections by means of L-shaped spacers. In other words, each of the edges is at least partially surrounded by one of the spacers. Suitably, the spacers are made of a plastic, and each of the spacers is preferably in mechanical contact with the coil winding, which in particular has a rectangular cross-section. Due to the spacers, the core is spaced from the coil winding, which on the one hand prevents electrical short circuit and on the other hand prevents damage to the coil winding due to the relatively sharp edges of the core.
Die Drosselspule weist ferner eine Kühlplatte auf, die zwischen zueinander einander benachbarten Abstandshaltern angeordnet ist. Geeigneterweise ist die Kühlplatte im Wesentlichen rechteckförmig gestaltet, wobei die Kühlplatte mit dem Kern und/oder der Spulenwicklung thermisch kontaktiert ist. Beispielsweise ist die Kühlplatte mit dem jeweiligen Bauteil in direktem mechanischem Kontakt oder mittels einer elektrisch isolierenden, jedoch thermisch leitenden Schicht verbunden. Geeigneterweise verläuft die Kühlplatte parallel zu dem Kern. Die Kühlplatte selbst weist ein Kühlrohr auf, das aus Edelstahl oder CuNiFe oder einer CuNiFe-Legierung gefertigt ist. Beispielsweise weist die Kühlplatte zwei derartige Kühlrohre auf. Das oder die Kühlrohre verlaufen vorzugsweise parallel zur Achse der Spulenwicklung, was einen Montage und einen Anschluss der Kühlrohre vereinfacht, und geeigneterweise gerade, was die Herstellungskosten der Kühlplatte verringert. Die Kühlrohre sind insbesondere innerhalb eines Kupfer- oder Aluminiumkörpers verpresst. Bei Betrieb der Drosselspule wird ein Kühlfluid durch die Kühlrohre geleitet und auf diese Weise Wärme von der Kühlplatte abtransportiert. Hierbei ist aufgrund der Materialwahl auch ein Betrieb mit Meerwasser ermöglicht.The choke coil further includes a cooling plate disposed between mutually adjacent spacers. Suitably, the cooling plate is made substantially rectangular in shape, wherein the cooling plate is thermally contacted with the core and / or the coil winding. For example, the cooling plate is connected to the respective component in direct mechanical contact or by means of an electrically insulating, but thermally conductive layer. Suitably, the cooling plate is parallel to the core. The cooling plate itself has a cooling tube made of stainless steel or CuNiFe or a CuNiFe alloy. For example, the cooling plate on two such cooling tubes. The cooling tube or tubes preferably run parallel to the axis of the coil winding, which facilitates mounting and connection of the cooling tubes, and suitably straight, which reduces the manufacturing cost of the cooling plate. The cooling tubes are pressed in particular within a copper or aluminum body. During operation of the choke coil, a cooling fluid is passed through the cooling tubes and in this way removes heat from the cooling plate. This is due to the choice of materials also allows operation with seawater.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigen:
- FIG 1,2
- jeweils eine Ausführungsform einer Drosselspule mit einer Kühlplatte in einer Schnittdarstellung,
- FIG 3
- eine weitere Ausführungsform der Drosselspule mit zwei Kühlplatten gemäß
FIG 1 , - FIG 4
- eine weitere Ausführungsform der Drosselspule mit zwei Spulenwicklungen gemäß
FIG 1 , - FIG 5
bis 8 - weitere Ausführungsformen der Drosselspule mit zwei Spulenwicklungen in einer Schnittdarstellung bzw. einer Draufsicht,
- FIG 9
- eine weitere Ausführungsform der Drosselspule mit zwei Spulenwicklungen in einer Draufsicht, und
- FIG 10
- eine letzte Ausführungsform der Drosselspule mit Abstandshaltern.
- FIG. 1, 2
- one embodiment of a choke coil with a cooling plate in a sectional view,
- FIG. 3
- a further embodiment of the choke coil with two cooling plates according to
FIG. 1 . - FIG. 4
- a further embodiment of the choke coil with two coil windings according to
FIG. 1 . - FIGS. 5 to 8
- Further embodiments of the choke coil with two coil windings in a sectional view and a plan view,
- FIG. 9
- a further embodiment of the choke coil with two coil windings in a plan view, and
- FIG. 10
- a final embodiment of the choke coil with spacers.
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
In
Die Drosselspule 4 umfasst ferner eine aus einem Kupfer oder einem Aluminium gefertigte Kühlplatte 16, deren Querschnitt senkrecht zur Achse der Spulenwicklung 2 größer als der der Spulenwicklung 2 selbst ist. Die Kühlplatte 16 ist topfförmige gestaltet und weist folglich eine Vertiefung 18 mit einem Boden 20 auf. In dem Boden 20 ist mittig eine Aussparung 22 eingebracht, deren Querschnitt dem Querschnitt des Kerns 8 entspricht, der darin angeordnet ist. Somit fluchten die Aussparung 6 der Spulenwicklung 2 und die Aussparung 22 der Kühlplatte 16, und der Kern 8 ist thermisch an der Kühlplatte 16 angebunden.The
Der Radius der runden Vertiefung 18 entspricht dem Radius der Spulenwicklung 2, die innerhalb der Vertiefung 18 formschlüssig angeordnet ist. Hierbei ist eine der Deckflächen 24 der Spulenwicklung 2 thermisch an die Kühlplatte 16 angebunden, wobei kein direkter mechanischer Kontakt zwischen der Kühlplatte 16 und der Spulenwicklung 2 vorhanden ist. Die Vertiefung 18 ist nämlich mittels einer elektrisch isolierenden Wärmeleitfolie 26 ausgekleidet, so dass ein Kurzschluss zwischen der Spulenwicklung 2 und der Kühlplatte 16 auch bei einer defekten oder nicht vollständigen Isolierung des Leiters der Spulenwicklung 2 ausgeschlossen ist.The radius of the
Die Drosselspule 4 ist Bestandteil eines Stromrichters, der sich auf einem Schiff im Einsatz befindet. Mittels der Drosselspule 4 werden hochfrequente Anteile innerhalb eines elektrischen Stroms unterdrückt. Bei Betrieb fließt der zu filternde elektrische Strom durch die Spulenwicklung 2, wobei die hochfrequenten Anteile zu einem Anstieg des elektrischen Widerstands aufgrund des entstehenden Magnetfeldes führt. Dieser Effekt wird mittels des Kerns 8 verstärkt. Aufgrund des fließenden elektrischen Stroms steigt die Temperatur der Spulenwicklung 2 an. Diese Wärme wird einerseits über die Wärmeleitfolie 26 an die Kühlplatte 16 und andererseits, in verringertem Maße, über die elektrische Isolierschicht 10 an den Kern abgegeben. Durch das Kühlrohr 14 wird Meerwasser geleitet, dessen Temperatur geringer als die des Kerns 8 ist. Infolgedessen wird die Wärme des Kerns 8 an das Meerwasser abgegeben und somit die Drosselspule 4 effizient gekühlt. Folglich ist es möglich, vergleichsweise große elektrische Ströme mittels der Drosselspule 4 zu leiten, ohne dass eine Beschädigung der Spulenwicklung 2 eintritt.The
In
In
In
In
Die beiden Kühlplatten 16, 32 liegen in einer Ebene, wobei die jeweils zugeordneten Spulenwicklungen 2, 34 sich auf der gleichen Seite bezüglich dieser Ebene befinden. Hierbei sind die beiden Kühlplatten 16, 32 zueinander beabstandet. Mit anderen Worten berühren sich die beiden Kühlplatten 16,32 sowie die Spulenwicklungen 2, 34 nicht. Die beiden Kerne 8 sind mittels eines quaderförmigen Jochs 38 verbunden, das auf den beiden Kernen 8 aufliegt und aus einem weichmagnetischen Eisen erstellt ist. Hierbei fluchtet das Joch 38 mit den jeweiligen Kanten der hierzu senkrecht angeordneten Kerne 8. Mittels des Jochs 38 ist ein magnetischer Rückschluss zwischen den beiden Kernen 8 erstellt, was die elektrischen Eigenschaften der Drosselspule 4 verbessert.The two
In
In
In
Die Erfindung ist nicht auf die vorstehend beschriebenen Ausführungsbeispiele beschränkt. Vielmehr können auch andere Varianten der Erfindung von dem Fachmann hieraus abgeleitet werden, ohne den Gegenstand der Erfindung zu verlassen. Insbesondere sind ferner alle im Zusammenhang mit den Ausführungsbeispielen beschriebene Einzelmerkmale auch auf andere Weise miteinander kombinierbar, ohne den Gegenstand der Erfindung zu verlassen.The invention is not limited to the embodiments described above. Rather, other variants of the invention can be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, all individual features described in connection with the exemplary embodiments are also combinable with one another in other ways, without leaving the subject matter of the invention.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14177832.4A EP2977996A1 (en) | 2014-07-21 | 2014-07-21 | Choke coil of a power converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14177832.4A EP2977996A1 (en) | 2014-07-21 | 2014-07-21 | Choke coil of a power converter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2977996A1 true EP2977996A1 (en) | 2016-01-27 |
Family
ID=51210367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14177832.4A Withdrawn EP2977996A1 (en) | 2014-07-21 | 2014-07-21 | Choke coil of a power converter |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2977996A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3288046A1 (en) | 2016-08-25 | 2018-02-28 | Siemens Aktiengesellschaft | Coil device |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0049382A1 (en) * | 1980-09-25 | 1982-04-14 | Transformatoren Union Aktiengesellschaft | Winding arrangement for transformers with a square cross-sectional core area |
EP0465700B1 (en) | 1990-07-10 | 1993-02-24 | Siemens Aktiengesellschaft | Single winding inductor |
DE9406996U1 (en) * | 1994-04-27 | 1994-06-30 | Vacuumschmelze Gmbh | Housing for a transformer of electrical energy |
US20070295715A1 (en) * | 2006-05-16 | 2007-12-27 | Denso Corporation | Reactor and power converter incorporating the reactor |
US20080017354A1 (en) * | 2006-07-19 | 2008-01-24 | Encap Technologies Inc. | Electromagnetic device with open, non-linear heat transfer system |
DE102009030068A1 (en) * | 2009-06-22 | 2010-12-30 | Mdexx Gmbh | Cooling element for a throttle or a transformer and inductor and transformer with such a cooling element |
DE102009030067A1 (en) * | 2009-06-22 | 2011-01-05 | Mdexx Gmbh | Heat sink for a choke or a transformer and inductor and transformer with such a heat sink |
WO2011004068A1 (en) * | 2009-07-07 | 2011-01-13 | Salomaeki Jarkko | Liquid cooling arrangement of an inductive component and a method for manufacturing an inductive component |
FR2954573A1 (en) * | 2009-12-23 | 2011-06-24 | Thales Sa | Planar power transformer for use in chopping converter, has connection stud arranged at periphery of stacking, where connection stud connects turns to cooling unit to evacuate heat generated by transformer |
EP2463871A1 (en) * | 2010-12-07 | 2012-06-13 | ABB Technology AG | Amorphous transformer core |
DE202014001945U1 (en) * | 2013-03-12 | 2014-03-20 | Vacon Oyj | Cooling device of the power component |
-
2014
- 2014-07-21 EP EP14177832.4A patent/EP2977996A1/en not_active Withdrawn
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0049382A1 (en) * | 1980-09-25 | 1982-04-14 | Transformatoren Union Aktiengesellschaft | Winding arrangement for transformers with a square cross-sectional core area |
EP0465700B1 (en) | 1990-07-10 | 1993-02-24 | Siemens Aktiengesellschaft | Single winding inductor |
DE9406996U1 (en) * | 1994-04-27 | 1994-06-30 | Vacuumschmelze Gmbh | Housing for a transformer of electrical energy |
US20070295715A1 (en) * | 2006-05-16 | 2007-12-27 | Denso Corporation | Reactor and power converter incorporating the reactor |
US20080017354A1 (en) * | 2006-07-19 | 2008-01-24 | Encap Technologies Inc. | Electromagnetic device with open, non-linear heat transfer system |
DE102009030068A1 (en) * | 2009-06-22 | 2010-12-30 | Mdexx Gmbh | Cooling element for a throttle or a transformer and inductor and transformer with such a cooling element |
DE102009030067A1 (en) * | 2009-06-22 | 2011-01-05 | Mdexx Gmbh | Heat sink for a choke or a transformer and inductor and transformer with such a heat sink |
WO2011004068A1 (en) * | 2009-07-07 | 2011-01-13 | Salomaeki Jarkko | Liquid cooling arrangement of an inductive component and a method for manufacturing an inductive component |
FR2954573A1 (en) * | 2009-12-23 | 2011-06-24 | Thales Sa | Planar power transformer for use in chopping converter, has connection stud arranged at periphery of stacking, where connection stud connects turns to cooling unit to evacuate heat generated by transformer |
EP2463871A1 (en) * | 2010-12-07 | 2012-06-13 | ABB Technology AG | Amorphous transformer core |
DE202014001945U1 (en) * | 2013-03-12 | 2014-03-20 | Vacon Oyj | Cooling device of the power component |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3288046A1 (en) | 2016-08-25 | 2018-02-28 | Siemens Aktiengesellschaft | Coil device |
WO2018036805A1 (en) | 2016-08-25 | 2018-03-01 | Siemens Aktiengesellschaft | Coil device |
US11443882B2 (en) | 2016-08-25 | 2022-09-13 | Siemens Aktiengesellschaft | Coil device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2294591B1 (en) | Water-cooled reactor | |
DE112015001505T5 (en) | Electric machine with heat transfer amplifier | |
EP2751815B1 (en) | Inductor | |
WO2020001682A1 (en) | Actively cooled coil | |
DE102017207659B4 (en) | Electric machine and method for manufacturing an electric machine | |
KR20120099673A (en) | Winding arrangement for an inductive component | |
DE3836415A1 (en) | ELECTROMAGNETIC DEVICE WITH COOLING DEVICE | |
DE10138164A1 (en) | Linear motor has base with coil channel and heat conduction hole, which is interposed between guide boards of stator | |
EP2977996A1 (en) | Choke coil of a power converter | |
EP3288046B1 (en) | Coil device | |
EP1635362B1 (en) | High power resistor with cooling by a streaming medium | |
DE112022000924T5 (en) | Coil device and power conversion device | |
EP0109024B1 (en) | Three-phase power current line | |
DE202014006814U1 (en) | winding arrangement | |
DE102012217607A1 (en) | Device for cooling | |
DE10051499A1 (en) | Plate lamella packet for electrical machines, has stacked plate lamellas and heat conducting layer mounted flat on plate lamella of thermal conductivity greater than that of plate lamellas | |
EP0124809B1 (en) | Inductive element | |
DE102019134671B4 (en) | FILTER FOR AN ELECTRICAL MACHINE | |
DE102018109565A1 (en) | coil assembly | |
DE102021108953B3 (en) | Stator of an axial flux electric machine and axial flux machine | |
DE102010023115A1 (en) | Conductor arrangement for use in transformer, has coiled strip conductor and terminal conductor, where coiled strip conductor is extended about terminal region to form dead conductor elongation end by flow of electric current | |
DE19738946C2 (en) | Choke coil without core | |
EP4270742A1 (en) | Electric motor | |
DE102022114854A1 (en) | Displacer body for a rotor and correspondingly designed rotor | |
DE102021108954A1 (en) | Stator of an axial flux electric machine and axial flux machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
17P | Request for examination filed |
Effective date: 20160621 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
17Q | First examination report despatched |
Effective date: 20170504 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SIEMENS AKTIENGESELLSCHAFT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20170715 |