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EP4576131A1 - Composant inductif - Google Patents

Composant inductif Download PDF

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Publication number
EP4576131A1
EP4576131A1 EP24221539.0A EP24221539A EP4576131A1 EP 4576131 A1 EP4576131 A1 EP 4576131A1 EP 24221539 A EP24221539 A EP 24221539A EP 4576131 A1 EP4576131 A1 EP 4576131A1
Authority
EP
European Patent Office
Prior art keywords
magnetic core
coil
coil carrier
inductive component
approximately
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.)
Pending
Application number
EP24221539.0A
Other languages
German (de)
English (en)
Inventor
Christof Gulden
Dr. Daniel Benner
Christian Dietmann
Markus Hummel
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.)
Filing date
Publication date
Application filed by Sts Spezial-Transformatoren-Stockach & Co KG GmbH filed Critical Sts Spezial-Transformatoren-Stockach & Co KG GmbH
Publication of EP4576131A1 publication Critical patent/EP4576131A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • the invention relates to an inductive component according to the features of the preamble of claim 1.
  • Inductors or inductive components with a magnetic circuit consisting primarily of a magnetic core material and a coil wound around a portion of the core material, are well known throughout electrical engineering.
  • the magnetic circuit often has one or more gaps to adjust the required inductance of the inductive component or to store the required magnetic energy of the inductive component.
  • An inductive component is, for example, from the German patent DE 10 2013 208 058 B4
  • the inductive component which can be a magnetically biased choke, has at least one coil winding.
  • the coil winding has a winding axis.
  • a magnetic core stack is arranged within the coil winding. This magnetic core stack consists of several magnetic core parts, so-called magnetic pills, spaced apart by a gap. The gaps are aligned at least approximately orthogonal to the winding axis of the coil winding.
  • inductive component with a magnetic circuit with multiple gaps in which insulators are inserted is disclosed in the European patent EP 1 501 106 B1 of the applicant.
  • inductive components are used, for example, as voltage regulators in the form of so-called buck converters or boost converters.
  • boost converter An example of a boost converter is given in the introduction to the DE 198 16 485 A1 and the local Figure 1 revealed.
  • An air gap can also be understood as a gap into which an insulator is inserted.
  • Such an air gap for example in the case of ferrite as the core material, results in a linearization of the component behavior with regard to inductance as a function of the current, but at the same time leads to a number of problems.
  • the cause is the magnetic stray fields, which extend further and further into the outer space around the magnetic circuit and even the inductive component as the air gap size increases.
  • the air gap or gap filled with insulator material is arranged within the coil winding to prevent electromagnetic interactions with electronic components in the vicinity.
  • the WO 2012/016586 A1 Describes a magnetic core stack consisting of several soft magnet segments and permanent magnet segments.
  • the magnetic stack has a stacking direction that lies between two yokes of the magnetic circuit.
  • This inductive component is a fault current limiter.
  • the aim of the present invention is therefore to provide an inductive component which has improved performance by enabling an optimized arrangement and structure of the magnetic core parts and the coil carrier.
  • the inductive component has a coil carrier on which at least one coil winding is arranged, wherein the coil winding has a winding axis X.
  • a magnetic core stack consisting of two or more magnetic core parts spaced apart from one another is located at least partially within the coil carrier. These magnetic core parts are each arranged around a gap with a specific width and substantially or at least approximately orthogonal to the winding axis.
  • the coil carrier is at least partially slotted in the region of the gaps in the magnetic core stack, wherein these slots run at least approximately parallel to the gaps in the magnetic core stack, but are wider than these gaps. In a plan view of the coil carrier, a gap in the magnetic core stack lies within a slot in the coil carrier.
  • One advantage of this configuration is improved electromagnetic decoupling between the air gaps and the resulting cantilevered fields with the coil former, which increases the performance of the inductive component.
  • Another advantage is a reduction in eddy current losses in the coil former, which leads to improved component performance. Since the coil former is preferably made of metal, particularly copper or aluminum, this also ensures improved heat dissipation from the interior of the inductive component.
  • the coil carrier can be U-shaped, at least approximately U-shaped, or at least approximately rectangular in cross-section. It is also within the scope of the present invention for the coil carrier to be circular or oval in cross-section.
  • the coil former is preferably made of a material with good thermal conductivity, particularly copper or aluminum, and is bent or folded as a sheet metal part to achieve its shape.
  • the slotted coil former can be formed by casting or by cutting, e.g., milling.
  • the coil former houses a magnetic core stack consisting of one or more magnetic core elements.
  • a coil winding is wound around the outer circumferential surface of the coil former.
  • the winding material of such a coil winding, particularly wire, tape, or RF stranded wire, is insulated to prevent short circuits.
  • two coil carriers are provided which are identically designed and arranged opposite each other as mirror images.
  • One coil carrier has a U-shaped sheet metal part at its front end and a similarly bent U-shaped sheet metal part at its other end. Between these two sheet metal parts are one or more U-shaped sheet metal parts, with all sheet metal parts of this coil carrier being spaced apart from each other by a gap of width C.
  • a sheet metal part angled at 90° can be integrally formed onto the free ends of the U-shaped parts. Viewed in section, the coil carrier is then almost rectangular in shape, with the opposing sheet metal parts not touching but rather aligned in a plane with a distance from each other.
  • the coil carrier is thus provided with a through-opening on one side.
  • Metallic sheet metal parts in particular those made of copper, can be used as sheet metal parts.
  • the coil carrier or parts of the coil carrier can also be made of another material with good heat conductivity, e.g. aluminum or aluminum oxide.
  • an outer part in particular an outer wall.
  • Such an outer wall is also made of copper, for example, and is attached to one of the main surfaces of the coil support in a U-shaped design. This outer wall then bridges the aforementioned slots in the coil support.
  • Such outer walls ensure improved mechanical stability of the coil support.
  • These outer walls also ensure improved heat dissipation from the interior of the inductive component and are preferably thermally connected to a wall of a housing of the inductive component. For example, these outer walls lie flat and preferably under pressure against a metallic wall of the housing of the inductive component, or are screwed or riveted to the housing wall.
  • outer parts can be provided to hold the coil support parts, which are arranged at a gap from one another, together and against each other, similar to a picket fence.
  • outer rods or outer tubes can also be provided here. If these rods or tubes are hollow, cooling liquid can also be passed through these cavities to contribute to good heat dissipation of the coil carrier.
  • the coil carrier is preferably connected at both outer ends with metal, preferably copper, mounting lugs. These mounting lugs can also be integrally formed onto parts of the coil carrier. These mounting tabs are thermally coupled to a wall of the housing of the inductive component, for example by screwing.
  • a magnetic core stack is inserted into the slotted coil former, the number of magnetic core stack elements being adapted to the number of parts of the coil former so that a corresponding number of gaps are present between the magnetic core stack elements.
  • the number of air gaps is smaller than the number of slots in the coil former.
  • the magnetic core yoke or, when two magnetic core yokes are used at least one, preferably both of the magnetic core yokes, can be U-shaped.
  • relatively thin sheets of insulating material can be inserted between the gaps of the magnetic core parts to create the air gaps. Inserting insulating sheets into the gaps of the magnetic core stack is recommended to ensure a defined width of the To ensure a gap between the magnetic core stack. Instead of such insulating plates, the present contract also involves gluing the magnetic core parts together. The adhesive layer itself then serves as an air gap.
  • the gaps of the magnetic core stack should be located between the slots of the coil former.
  • the gaps should preferably be aligned symmetrically or centrally to the slots of the coil former.
  • the individual magnetic core parts of the magnetic core stack can consist, for example, of ferrite or of a nanocrystalline material, an amorphous magnetic material or a powder material.
  • Figure 1 An embodiment of an inductive component according to the invention is shown.
  • the inductive component is provided with the reference number 1.
  • Figure 1 For better visibility of the structure of the coil carrier and the magnetic core stack arranged therein, Figure 1 The coil windings have not been shown. However, this will be explained in connection with the later figures.
  • the inductive component 1 has a coil carrier arrangement, which preferably consists of two metallic coil carriers 10. Each of these coil carriers 10 is provided to accommodate a coil winding.
  • the two coil carriers 10 are made of a metallic material, preferably copper.
  • the two coil supports 10 are arranged mirror-symmetrically to one another and, in the illustrated embodiment, have four coil support parts lying next to one another along a winding axis X of the coil winding (not shown), each of which is bent essentially into a square shape.
  • the four adjacent coil support parts are spaced from one another by a slot 12. Accordingly, there are three slots 12 between each of the four coil support parts.
  • this coil support part has a first main surface 10a, a second main surface 10b, a third main surface 10c, and a fourth main surface 10d.
  • the first main surface 10a forms Figure 1 the bottom of the coil carrier 10.
  • the second main surface 10b extends vertically upwards at a right angle from the first main surface 10a.
  • the third main surface 10c extends towards the viewer.
  • This third main surface 10c is L-shaped when viewed from above, with another wall section of the coil carrier 10 extending from this L-shaped third main surface 10c back down at a right angle to the first main surface 10a.
  • a wall section 10d extends upwards from the first main surface 10a.
  • the upward-facing wall section and the downward-facing wall section form the fourth main surface 10d, but are spaced apart from one another.
  • the coil carrier 10 facing the viewer is designed in a similar way and is a mirror image of the first coil carrier 10 facing away from the viewer.
  • This outer wall 15 extends in the direction of the winding axis X over the entire or almost the entire length of the two coil supports 10.
  • L-shaped fastening tabs 17 are formed on the first main surfaces of the edge-side coil support parts, preferably pointing inwards under the coil support 10. Via these fastening tabs 17, which preferably have fastening holes, the coil supports 10 can be mechanically connected to a housing part of the inductive component 1 and fastened there.
  • the arrangement consisting of two coil carriers 10 has a through-opening 14, whereby two channels running parallel to the winding axis X are formed via the claw-shaped coil carrier parts, into each of which a magnetic core stack can be inserted.
  • the two coil carriers 10, which are arranged as mirror images of each other are separated from each other by a slot on their left and right coil carrier parts.
  • the two slots are in Figure 1 provided with the reference number 11.
  • the magnetic core to be inserted into the two coil supports is designed as a double U-shaped core and is designated by reference numeral 20.
  • the magnetic core has a total of four cuboid-shaped magnetic core parts 21. Two of these magnetic core parts 21 are each inserted into a channel of the coil supports 10, with a spacer element 27, preferably made of aluminum oxide or ceramic, interposed between the two magnetic core parts. A spacer element 27 is in turn attached to the free outer sides of the magnetic core parts 21 thus inserted into the two channels of the two coil supports 10.
  • the two magnetic core stacks 20, each with two magnetic core parts 21, are then magnetically connected by a U-shaped magnetic core yoke 25.
  • the magnetic core yokes on the left and right are designated by reference numeral 25.
  • Figure 3 shows the arrangement of Figure 2 in plan view from vertically above the two coil carriers 10 with the magnetic core inserted therein.
  • the mentioned Slots 12 between the individual coil carrier parts can be seen. As explained, there are three slots 12 between each coil carrier 10. These slots 12 have Figure 4 a distance C.
  • the slots 12 are arranged orthogonally to the winding axis X of the inductive component 1.
  • Magnetic core parts 21 of the magnetic core stack 20 protrude from both sides into the respective slots 12 of the coil carriers 10.
  • the individual magnetic core parts 21 are also arranged at a distance from one another. This distance is defined by an air gap or by the spacer elements 27 inserted there. The distance is B.
  • This distance B between the individual magnetic core parts 21 is, as the enlarged illustration of Figure 4 shows, significantly smaller than the width of the gap 23.
  • the width of the magnetic core stack and thus the width of the spacer element 27 is at least approximately between about 1 mm and about 3 mm
  • the slots 12 of the coil carrier and thus the width C of the slots 12 are selected to be approximately two to five times as large.
  • the width of the slots 12 of the coil carrier 10 can therefore preferably be between 2 mm and 15 mm.
  • the spacer elements 27 are preferably placed centrally to the width C of the slots of the coil carrier 10.
  • the spacer elements 27 are also aligned orthogonally to the winding axis X.
  • the outer walls 15 have a thickness D. This thickness D can be made wider than the thickness of the walls of the coil carrier 10. This is advantageous for good power loss dissipation from the interior of the inductive component 1, in particular when the outer walls 15 lie flat against the metallic housing walls of the inductive component 1, for example via the tabs 17 shown.
  • Figure 5 shows a similar representation as Figure 1 .
  • coil windings 30 are now wound on each of the two coil carriers 10.
  • Figure 5 It is clear that the entire magnetic core 20 consists of a total of six magnetic core parts, four of which are cuboid magnetic core parts 21 and two magnetic core yokes 25 located to the left and right of these magnetic core parts 21.
  • a spacer element 27 is located between the magnetic core parts 21 and the respective magnetic core yoke 25.
  • the open ends 25a, 25b of the two magnetic core yokes 25 have the same rectangular contour as the spacer elements 27 adjacent there or the cuboid magnetic core parts 21 located between the two magnetic core yokes 25.
  • Figure 6 shows the inductive component 1 with the two coil carriers 10 and the two coil windings 30 sitting thereon in the installation situation in a preferably metallic housing 60.
  • the metallic housing 60 is approximately rectangular or cuboid-shaped, as the top view in Figure 6 shows.
  • Figure 7 Finally, the inductive component 10 of Figure 6 shown in a perspective view from the front. For clarity, an upper cover part of the housing 60 has been omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)
EP24221539.0A 2023-12-22 2024-12-19 Composant inductif Pending EP4576131A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102023136437 2023-12-22

Publications (1)

Publication Number Publication Date
EP4576131A1 true EP4576131A1 (fr) 2025-06-25

Family

ID=93926588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24221539.0A Pending EP4576131A1 (fr) 2023-12-22 2024-12-19 Composant inductif

Country Status (1)

Country Link
EP (1) EP4576131A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816485A1 (de) 1998-04-14 1999-10-28 Aloys Wobben Spule
EP1501106B1 (fr) 2003-07-23 2011-02-02 STS, Spezial-Transformatoren-Stockach GmbH & Co. Noyau en ferrite pour inductance
WO2012016586A1 (fr) 2010-08-03 2012-02-09 Areva T&D Uk Limited Noyau
US20130182478A1 (en) * 2010-09-22 2013-07-18 Sumitomo Electric Industries Ltd Reactor, converter, and electric power converter
DE102013208058B4 (de) 2013-05-02 2015-09-10 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Magnetisch vorgespannte Drossel
US20180330866A1 (en) * 2015-12-10 2018-11-15 Autonetworks Technologies, Ltd. Reactor
JP2019079838A (ja) * 2017-10-20 2019-05-23 スミダコーポレーション株式会社 トランス装置
DE102021102685A1 (de) * 2021-02-05 2022-08-11 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Induktives Bauteil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816485A1 (de) 1998-04-14 1999-10-28 Aloys Wobben Spule
EP1501106B1 (fr) 2003-07-23 2011-02-02 STS, Spezial-Transformatoren-Stockach GmbH & Co. Noyau en ferrite pour inductance
WO2012016586A1 (fr) 2010-08-03 2012-02-09 Areva T&D Uk Limited Noyau
US20130182478A1 (en) * 2010-09-22 2013-07-18 Sumitomo Electric Industries Ltd Reactor, converter, and electric power converter
DE102013208058B4 (de) 2013-05-02 2015-09-10 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Magnetisch vorgespannte Drossel
US20180330866A1 (en) * 2015-12-10 2018-11-15 Autonetworks Technologies, Ltd. Reactor
JP2019079838A (ja) * 2017-10-20 2019-05-23 スミダコーポレーション株式会社 トランス装置
DE102021102685A1 (de) * 2021-02-05 2022-08-11 Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg Induktives Bauteil

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