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EP2801987B1 - Composant inductif - Google Patents

Composant inductif Download PDF

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Publication number
EP2801987B1
EP2801987B1 EP14167388.9A EP14167388A EP2801987B1 EP 2801987 B1 EP2801987 B1 EP 2801987B1 EP 14167388 A EP14167388 A EP 14167388A EP 2801987 B1 EP2801987 B1 EP 2801987B1
Authority
EP
European Patent Office
Prior art keywords
inductive component
coil
accordance
isolator
heat
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.)
Active
Application number
EP14167388.9A
Other languages
German (de)
English (en)
Other versions
EP2801987A1 (fr
Inventor
Wilhelm KRÄMER
Christof Gulden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sts Spezial-Transformatoren-Stockach & Co KG GmbH
Original Assignee
Sts Spezial-Transformatoren-Stockach & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Sts Spezial-Transformatoren-Stockach & Co KG GmbH filed Critical Sts Spezial-Transformatoren-Stockach & Co KG GmbH
Publication of EP2801987A1 publication Critical patent/EP2801987A1/fr
Application granted granted Critical
Publication of EP2801987B1 publication Critical patent/EP2801987B1/fr
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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
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • 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
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling

Definitions

  • the invention relates to an inductive component with at least one winding according to the preamble of patent claim 1.
  • Such an inductive component is a choke with a winding arranged on a magnetizable magnetic core, for example from DE 10 2011 082 045 A1 known.
  • a flat cooling element is provided which is thermally coupled to the surface of the winding facing away from the magnetic core and for this purpose a heat-conducting electrical insulator in the form of an electrically insulating heat-conducting foil is provided between this cooling element and the winding. Since the winding has a rectangular cross-section as a single-layer winding, this heat-conducting film rests on a flat surface of this rectangular shape of the winding and is covered with a flush fit by the flat cooling element.
  • an inductive component is also known in which an inductive winding is thermally coupled to a cooling element via a heat-conducting insulator.
  • the winding lies within a magnetic core.
  • the invention has for its object to provide an inductive component of the type mentioned, in which a significantly improved heat dissipation is achieved compared to the prior art.
  • the outer surface of the winding is at least partially, preferably completely flush, surrounded by the insulator and this insulator is in turn flush with the housing, a large thermal contact surface is achieved between the winding and the housing designed as a cooling element, thereby realizing a very high cooling capacity becomes.
  • the installation space of the inductive component is minimized by such an arrangement.
  • the insulator is tubular, in particular in the form of a heat pipe, as a result of which a high heat flow from the winding via this heat pipe in the housing comes into being.
  • the insulator can also be formed from one or more shells or shell elements.
  • the insulator is designed as a winding around the at least one winding made of a heat-conducting film.
  • the advantage of using a heat-conducting film is that it adapts well to the surface structure of the winding when the winding is wound around the winding, and a low heat transfer resistance between the winding and the winding produced from the heat-conducting film is thereby achieved. It is also possible for the heat-conducting insulator to be designed as a pre-bent element.
  • the housing is formed on the outside with cooling fins. This significantly improves the heat dissipation from the winding, since the housing acts as a heat sink with these cooling fins.
  • such ribs can also or additionally be provided in the interior of the housing.
  • the housing is advantageously designed with at least two housing parts each having interface surfaces, these housing parts being designed with the interface surfaces in such a way that the insulator is pressed, in particular screwed, between the at least one winding and the housing parts connected via the interface surfaces. This compression of the insulator between the winding and the housing further improves the heat dissipation via the housing.
  • the at least one winding is wound on an insulation tube as a coil former. This is particularly useful if, according to the further development, the one winding is arranged on a magnetic core.
  • This insulation tube can also be formed from a heat-conducting material.
  • such a magnetic core can be designed as a ferrite core, powder core, laminated core or as a magnetic core consisting of a plurality of magnetic segments with insulation elements lying between them. A combination of these materials is also possible.
  • At least one winding can be formed from a flat wire, a tape winding, round wire or an HF stranded wire.
  • a further embodiment of the invention provides that the insulator protrudes at one or both ends of the at least one winding - seen in the axial direction of the winding. In this way, necessary air and creepage distances to the housing of the inductive component can be reliably maintained. It is expedient that these gaps are filled with suitable potting material.
  • Another development of the invention provides that between the heat-conducting insulator and the cooling element a further insulation element, in particular an insulation film, is arranged. This further improves the dielectric strength of the inductive component.
  • the heat-conducting insulator preferably consists of a silicone and polyurethane with a ceramic and / or quartz filling and preferably has a Shore hardness in the range from about 70 to 80.
  • a thermally conductive silicone or polyurethane film can also be used as the heat-conducting insulator.
  • the inductive components 1 after Figure 1 represents in an exploded view a choke with two each on a magnetic core 6.1 and 6.2 arranged windings 2.1 and 2.2, which in turn are each wound on an insulation tube 5.1 and 5.2 as a coil former.
  • the Figure 2 shows this throttle 1 in the assembled state.
  • a hollow cylindrical insulator 4.1 and 4.2 is arranged on the windings 2.1 and 2.2, the inner lateral surfaces of these two insulators 4.1 and 4.2 being connected to the outer contour, i.e. are matched to the outer surfaces of the two windings 2.1 and 2.2 and preferably lie there.
  • a heat-conducting film is used for the two insulators 4.1 and 4.2, which is wound directly onto the two windings 2.1 and 2.2 to form a winding.
  • a housing 3 composed of two housing parts 3.1 and 3.2, which consists of a lower housing part 3.1 and an upper housing part 3.2, serves as the cooling element for this throttle 1.
  • the two housing parts 3.1 and 3.2 each have interface surfaces 3.5 and 3.6, respectively, via which the two housing parts 3.1 and 3.2 are joined and screwed together using screw connections 7.
  • the housing 3 has two cylindrical interior spaces, which are formed by an interior 3.11 or 3.12 of the lower housing part 3.1 together with an inner space 3.21 or 3.22 of the upper housing part 3.2.
  • the inner contour of these two cylindrical inner spaces corresponds to the cylindrical outer contour of the two insulators 4.1 and 4.2, so that the inner outer surfaces of the two inner spaces of the housing parts 3.1 and 3.2 bear flush against the outer surfaces of the two windings 2.1 and 2.2, i.e. they touch them cylindrical.
  • the two housing parts 3.1 and 3.2 are screwed together via flanges 3.7 formed on the upper housing part 3.2, which rest on the interface surfaces 3.5 of the lower housing part 3.1, so that the two insulators 4.1 and 4.2 between the two windings 2.1 and 2.2 and the two housing parts 3.1 and 3.2 be pressed. As a result, the heat conduction between the two windings 2.1 and 2.2 and the housing 3 is improved. Improved cooling of the throttle 1 is also achieved in that both the lower housing part 3.1 and the upper housing part 3.2 are equipped with cooling surfaces 3.3 and 3.4. These cooling surfaces 3.3, 3.4 can have cooling fins. This housing 3 thus also takes on the function of a heat sink.
  • the choke 1 has two soft magnetic yokes 8.1 and 8.2 connecting the two magnetic cores 6.1 and 6.2. These two yokes 8.1 and 8.2 are each received by an insulation box 9.1 and 9.2, these two insulation boxes 9.1 and 9.2 each being arranged on an end face of the housing 3 and connected to the same.
  • the throttle 1 is terminated at the end by means of an installation cover 10.1 and 10.2, in that the installation covers 10.1 and 10.2 are screwed to the housing 3 together with the insulation boxes 9.1 and 9.2 using fixing screws 11.1 and 11.2.
  • Ferrite cores can be used as magnetic cores 6.1 and 6.2.
  • segmented magnetic cores 6.1 and 6.2 can be used, each of which is composed of magnetic segments 6.11 and 6.21 isolated from one another by means of insulation elements 6.12 and 6.22.
  • insulation elements 6.12 and 6.22 instead of or in addition to these insulation segments 6.12, 6.11, permanent magnet segments can also be used.
  • powder cores, laminated cores or a combination of these cores can also be used.
  • FIG. 3 Another embodiment of an inductive component according to the invention is shown.
  • This exemplary embodiment is largely similar to the inductive component of FIG Fig. 1 .
  • they are in Figure 1 inserted, tube-shaped, heat-conducting insulators 4.1, 4.2 are now replaced by heat-conducting insulators 4.3, 4.4, 4.5, 4.6, which are bowl-shaped, and how the sectional view of Figure 4 shows, enclose only the upper area and lower area of the windings 2.1, 2.2 and rest there.
  • each of the shell-shaped insulators 4.3, 4.4, 4.5 and 4.6 encompasses a winding 2.1, 2.2 by about 90 °.
  • Other angles can of course also be provided, e.g. B. 60 ° to 120 °.
  • the shell-shaped insulators 4.3, 4.4, 4.5 and 4.6 are in turn inserted between the housing 3.1 or 2 and the winding 2.1 and the winding 2.2 and the housing part 3.1 and 3.2 and are preferably pressed by the screw connection already mentioned.
  • a remaining, free space between the housing components 3.1, 3.2 and the windings 2.1, 2.2 or the aforementioned cup-shaped insulators 4.3, 4.4, 4.5 and 4.6 is expediently poured out with a suitable material, preferably a casting resin.
  • This material is in the sectional view of Figure 4 designated by the reference numeral 20. This material is preferably also designed as a heat-conducting material.
  • FIG. 5 Another embodiment of an inductive component according to the invention is shown.
  • This exemplary embodiment differs from the aforementioned exemplary embodiments in particular in that a two-layer winding of the choke is provided here.
  • the two windings 2.1, 2.2 already described are provided within which there is a second layer of windings in the form of windings 2.3 and 2.4.
  • the winding 2.3 is located within the winding 2.1.
  • the winding 2.4 is located within the winding 2.2.
  • the windings 2.3 and 2.4 are wound on the insulation pipes 5.1 and 5.2.
  • these insulation pipes 5.1 and 5.2 can also be designed as heat-conducting insulation pipes.
  • a tubular, heat-conducting insulator 4.7, 4.8 is in turn arranged around the two windings 2.1, 2.2.
  • the two insulators 4.7 and 4.8 are curved, prefabricated insulation elements made of heat-conducting material, with wall sections overlapping somewhat along the length of these tubular insulators 4.7, 4.8 over the entire length of the insulators 4.7, 4.8. This overlapping area is marked for the isolator 4.8 with the reference symbol 4.81.
  • tubular insulator 4.9 is placed between the windings 2.1 and 2.3. The same applies to the windings 2.2 and 2.4. There is also a tubular insulator 4.10 interposed. The overlapping area is identified by the reference number 4.101.
  • FIG. 6 is the sectional view along the in Fig. 5 shown section plane.
  • the already known reference numerals are also used there. It is again particularly well evident that the housing parts 3.1, 3.2 are arranged in a surface-fitting manner with their inner walls against the insulators 4.7, 4.8 in order to achieve good heat dissipation.
  • the insulators 4.1 ... 4.10 also - seen in the axial direction of the windings 2.1, 2.2 or 2.3, 2.4 - over the ends the windings can stick out a little. This increases the required air and creepage distances and thus ultimately the throughput strength of the inductive component.
  • silicone or polyurethane with ceramic or quartz filling can be used as the material for the heat-conducting insulators 4.1 ... 4.10.
  • This material should have a Shore hardness in the range of about 70 to 80. It is particularly favorable if this material has a thermal conductivity of approximately greater than or equal to 1.5 W / mK.
  • the heat-conducting insulator can be, for example, a suitably designed thermally conductive silicone or polyurethane film. Such a film must be wrapped. To avoid the bending process, it is also advisable to provide a correspondingly pre-shaped element as an insulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (16)

  1. Composant inductif (1) comprenant au moins un enroulement (2.1, 2.2) positionné sur un noyau magnétique (6.11, 6.21) de forme cylindrique et comportant une surface enveloppe, l'enroulement (2.1, 2.2) étant thermiquement couplé à un élément de refroidissement (3) par l'intermédiaire d'un isolant thermiquement conducteur (4.1, 4.2), caractérisé en ce que
    - l'isolant (4.1, 4.2) est adapté par une liaison par des surfaces, le long de la surface enveloppe de l'enroulement (2.1, 2.2) dans la direction axiale de cet enroulement (2.1, 2.2),
    - l'isolant (4.1, 4.2) est réalisé sous la forme d'une enveloppe qui entoure au moins partiellement au moins un enroulement (2.1, 2.2), et
    - l'élément de refroidissement est réalisé sous la forme d'un boîtier (3) recevant l'enroulement (2.1, 2.2) ayant un volume interne (3.11, 3.12, 3.21, 3.22), le contour interne du volume interne (3.11, 3.12, 3.21, 3.22) du boîtier (3) étant adapté au contour externe de l'isolant (4.1, 4.2).
  2. Composant inductif (1) conforme à la revendication 1,
    caractérisé en ce que
    l'isolant est réalisé sous la forme d'un tube en particulier d'un tube thermiquement conducteur (4.1, 4.2).
  3. Composant inductif (1) conforme à la revendication 1,
    caractérisé en ce que
    l'isolant est réalisé sous la forme d'un rouleau (4.1, 4.2) d'un film thermiquement conducteur appliqué autour de l'enroulement (2.1, 2.2).
  4. Composant inductif (1) conforme à la revendication 1,
    caractérisé en ce que
    l'isolant (4) est réalisé sous la forme d'une coque (4.3, 4.4, 4.5, 4.6).
  5. Composant inductif (1) conforme à la revendication 1,
    caractérisé en ce que
    l'isolant (4.1, 4.2) est réalisé sous la forme d'un élément bombé préfabriqué (4.7, 4.8).
  6. Composant inductif (1) conforme à l'une des revendications précédentes,
    caractérisé en ce que
    le boîtier (3) comporte côté externe des nervures de refroidissement (3.3, 3.4).
  7. Composant inductif (1) conforme à l'une des revendications précédentes,
    caractérisé en ce que
    - le boîtier (3) comporte au moins deux parties de boîtier (3.1, 3.2) comportant chacune des surfaces d'interface (3.5, 3.6), et
    - les parties de boîtier (3.1, 3.2) sont réalisées avec les surfaces d'interface (3.5, 3.6) de sorte que l'isolant (4.1, 4.2) soit comprimé en particulier vissé entre l'enroulement (2.1, 2.2) et les parties de boîtier (3.1, 3.2) reliées par l'intermédiaire des surfaces d'interface (3.5, 3.6).
  8. Composant inductif (1) conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'enroulement (2.1, 2.2) est en particulier réalisé sous la forme d'un fil métallique plat d'une bande enroulée d'un fil métallique rond ou d'une tresse HF.
  9. Composant inductif (1) conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'enroulement (2.1, 2.2) est enroulé sur un tube d'isolation (5.1, 5.2).
  10. Composant inductif (1) conforme la revendication 1,
    caractérisé en ce que
    le tube d'isolation (5.1, 5.2) est réalisé en un matériau thermiquement conducteur.
  11. Composant inductif (1) conforme à l'une des revendications précédentes,
    caractérisé en ce que
    le noyau magnétique (6.1, 6.2) est un noyau en ferrite, un noyau en poudre, un noyau en tôle ou une combinaison de tels noyaux.
  12. Composant inductif (1) conforme à l'une des revendications 1 à 11,
    caractérisé en ce que
    le noyau magnétique (6.1, 6.2) est formé de plusieurs segments magnétiques (6.11, 6.21) avec des éléments d'isolation (6.12, 6.22) interposés entre ceux-ci.
  13. Composant inductif (1) conforme à l'une des revendications 1 à 12,
    caractérisé en ce que
    l'isolant (4.1, 4.2) dépasse sur un ou sur les deux extrémités de l'enroulement (2.1, 2.2) dans la direction axiale de cet enroulement (2.1, 2.2).
  14. Composant inductif (1) conforme à l'une des revendications 1 à 13,
    caractérisé en ce qu'
    un autre élément d'isolation, en particulier un film d'isolation est positionné entre l'isolant thermiquement conducteur (4.1, 4.2) et l'élément de refroidissement (3).
  15. Composant inductif (1) conforme à l'une des revendications 1 à 14,
    caractérisé en ce que
    l'isolant thermiquement conducteur (4.1, 4.2) est réalisé sous la forme d'un film en silicone thermiquement conducteur ou d'un film en polyuréthane thermiquement conducteur.
  16. Composant inductif (1) conforme à l'une des revendications 1 à 15,
    caractérisé en ce que
    l'isolant thermiquement conducteur (4.1, 4.2) est constitué par un silicone ou un polyuréthane comportent une charge de céramique ayant une dureté shore située dans la plage d'environ 70 ou 80.
EP14167388.9A 2013-05-10 2014-05-07 Composant inductif Active EP2801987B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013208653.9A DE102013208653A1 (de) 2013-05-10 2013-05-10 Induktives Bauteil

Publications (2)

Publication Number Publication Date
EP2801987A1 EP2801987A1 (fr) 2014-11-12
EP2801987B1 true EP2801987B1 (fr) 2020-04-15

Family

ID=50630712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14167388.9A Active EP2801987B1 (fr) 2013-05-10 2014-05-07 Composant inductif

Country Status (3)

Country Link
EP (1) EP2801987B1 (fr)
DE (1) DE102013208653A1 (fr)
ES (1) ES2804589T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022105515U1 (de) 2021-09-30 2023-01-26 Abb Schweiz Ag Ein Gehäuse für magnetische Elemente
DE102023102495A1 (de) 2023-02-01 2024-08-01 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Induktives Bauteil mit verbesserter Entwärmung
EP4593042A3 (fr) * 2024-01-29 2025-08-27 STS Spezial-Transformatoren-Stockach GmbH & Co. KG Dispositif inductif

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022105515U1 (de) 2021-09-30 2023-01-26 Abb Schweiz Ag Ein Gehäuse für magnetische Elemente
DE102023102495A1 (de) 2023-02-01 2024-08-01 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Induktives Bauteil mit verbesserter Entwärmung
WO2024160744A1 (fr) 2023-02-01 2024-08-08 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Composant inductif à dissipation de chaleur améliorée
EP4593042A3 (fr) * 2024-01-29 2025-08-27 STS Spezial-Transformatoren-Stockach GmbH & Co. KG Dispositif inductif

Also Published As

Publication number Publication date
EP2801987A1 (fr) 2014-11-12
DE102013208653A1 (de) 2014-11-13
ES2804589T3 (es) 2021-02-08

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