WO2023104377A1 - Ensemble inductif - Google Patents

Ensemble inductif Download PDF

Info

Publication number
WO2023104377A1
WO2023104377A1 PCT/EP2022/078510 EP2022078510W WO2023104377A1 WO 2023104377 A1 WO2023104377 A1 WO 2023104377A1 EP 2022078510 W EP2022078510 W EP 2022078510W WO 2023104377 A1 WO2023104377 A1 WO 2023104377A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic core
core segment
inductive assembly
circuit board
segment
Prior art date
Application number
PCT/EP2022/078510
Other languages
German (de)
English (en)
Inventor
Soeren QUASS
Berlioz NWAFO TAKA
Thomas Meyer
Frank Zabbe
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2023104377A1 publication Critical patent/WO2023104377A1/fr

Links

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
    • H01F27/24—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
    • H01F27/2804—Printed windings
    • 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
    • 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
    • H01F27/2804—Printed windings
    • H01F2027/2819—Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit

Definitions

  • the present invention relates to an inductive assembly having the features of independent claim 1.
  • DCDC converters normally require inductive components as a storage medium or for galvanic isolation if this is required for safety reasons or to provide multiple output voltages.
  • the inductive components form an inductive assembly and include a coil and at least one magnetic core.
  • the magnetic core is usually composed of an E-shaped first magnetic core segment and an I-shaped second magnetic core segment.
  • the first magnetic core segment and the second magnetic core segment are glued together, for example, or are joined and held together using clamps.
  • an inductive assembly includes a coil, a first magnetic core segment, and a second magnetic core segment, the first magnetic core segment and the second magnetic core segment together forming a magnetic core for the coil, the coil extending around at least a portion of the magnetic core.
  • recesses are formed in the first magnetic core segment, with the second magnetic core segment being arranged at least partially in the recesses, with the inductive assembly also comprising a component with a bearing surface, with the second magnetic core segment is arranged between the first magnetic core segment and the component.
  • the second magnetic core segment can thus be fixed between the first magnetic core segment and the component, for example clamped.
  • the first magnetic core segment can be pressed against the component with the second magnetic core segment being interposed.
  • the inductive assembly has the advantage that the inductive assembly can be manufactured particularly easily and inexpensively.
  • Gluing or stapling to attach the magnetic core segments to one another can be dispensed with during manufacture.
  • the second magnetic core segment is positioned and held on the first magnetic core segment by the recesses in the first magnetic core segment. In this way, the second magnetic core segment can be positioned relative to the first magnetic core segment.
  • An outer contour on the second magnetic core segment is adapted, for example, to an inner contour in the recesses in the first magnetic core segment in such a way that the outer contour of the second magnetic core segment is in contact with the inner contour of the first magnetic core segment and rests against it, for example.
  • the second magnetic core segment can advantageously be fixed to the first magnetic core segment without adhesive or clamps on the first magnetic core segment.
  • a part of the second magnetic core segment is fitted into the recesses.
  • the geometries of the magnetic core segments are thus changed and adapted to one another in such a way that the second magnetic core segment is inserted into the recesses of the first magnetic core segment or pressed into them, so that the magnetic core segments are held together.
  • the inductive assembly also includes a component with a bearing surface, with the second magnetic core segment being arranged between the first magnetic core segment and the component, the second magnetic core segment can be fixed, for example clamped, between the first magnetic core segment and the component.
  • the first magnetic core segment can be pressed against the component with the second magnetic core segment being interposed.
  • the component is designed as a housing.
  • a surface on the housing can thus serve as a bearing surface and the second magnetic core segment can be fixed between the housing and the first magnetic core segment, for example clamped.
  • the first magnetic core segment can be pressed against the housing, for example with the second magnetic core segment being interposed.
  • the inductive assembly further comprises a printed circuit board, the first magnetic core segment being fastened, in particular glued, to the printed circuit board, the printed circuit board being fastened to the component, the second magnetic core segment between the first magnetic core segment and the component is arranged.
  • the second magnetic core segment can thus advantageously be fastened to the first magnetic core segment easily and well without adhesive and/or clamps.
  • the second magnetic core segment is aligned and fixed relative to the first magnetic core segment by the recesses in the first magnetic core segment.
  • the first magnetic core segment has a base area and two legs, with the two legs each protruding from the base area at one end of the base area, with at least part of the second magnetic core segment being arranged between the two legs of the first magnetic core segment.
  • the first magnet core segment can thus advantageously have a U-shaped or an E-shaped form.
  • the base area with the two legs of the first magnetic core segment and the second magnetic core segment together form the magnetic core in which a closed magnetic circuit can be formed.
  • the second magnet core segment can advantageously extend between the two legs of the first magnet core segment and connect them to one another. A closed magnetic circuit can thus be formed in the magnetic core segment.
  • At least one recess is formed in each leg, with the recesses facing each other, with the second magnetic core segment having two fastening areas of the second magnetic core segment, with the second magnetic core segment extending between the two legs of the first magnetic core segment, one fastening area of the second magnetic core segment in one of the recesses is arranged.
  • the fastening areas of the second magnetic core segment are adapted to the recesses in the first magnetic core segment, for example.
  • two fastening areas are formed on the second magnetic core segment.
  • the attachment areas of the second magnetic core segment can be formed, for example, at the ends of the second magnetic core segment.
  • the first magnet core segment is essentially U-shaped or E-shaped.
  • the second magnetic core segment is essentially I-shaped.
  • the first magnetic core segment and the second magnetic core segment together with the coil and a further coil, form a transformer, in particular a planar transformer.
  • FIG. 2 shows a sectional illustration through the exemplary embodiment of the inductive assembly.
  • the figures show three spatial directions, an x-direction, a y-direction and a z-direction.
  • the x-direction is perpendicular to the y-direction.
  • the x-direction and the y-direction span an xy-plane.
  • the z-direction is perpendicular to the x-direction and perpendicular to the y-direction. Together with the x-direction, the z-direction spans an xz-plane.
  • the inductive assembly 1 comprises at least one coil 5, at least one first magnetic core segment 30 and at least one second magnetic core segment 40.
  • the inductive assembly 1 also comprises a component 50 and a printed circuit board 20.
  • the first magnetic core segment 30 forms a magnetic core 10 together with the second magnetic core segment 40 for coil 5. Together with magnetic core segments 30, 40, coil 5 forms an inductive assembly 1.
  • the inductive assembly 1 can be used, for example, as a common-mode choke or push-pull choke in a large number of electronic power components, such as inverters or DC/DC converters.
  • the inductive assembly 1 can be used, for example, in filters with common-mode chokes.
  • the inductive assembly 1 can be used, for example, in passive electrical filters to suppress unwanted high-frequency interference. Another area of application is the use as a transformer. If the inductive assembly 1 is designed as a transformer, the inductive assembly 1 includes a further coil 6 in addition to the coil 5.
  • the magnetic core segments 30, 40 can be made of a soft magnetic material.
  • a soft magnetic material is classified by in the IEC 60404-1 standard.
  • the magnetic core segments 30, 40 can be ferrite or powder magnetic core segments or, for example, consist of crystalline or amorphous metal strips.
  • the magnetic core segments 30, 40 can form a closed magnetic circuit, as in the exemplary embodiments shown here.
  • the magnetic core segments 30, 40 together form a magnetic core 10.
  • the magnetic core segments 30, 40 are joined together and thus form a closed magnetic circuit.
  • the magnetic core segments 30,40 can have different shapes.
  • the magnetic core segments 30, 40 can, for example, be I-shaped, U-shaped or E-shaped.
  • the first magnetic core segment 30 can be U-shaped.
  • the first magnetic core segment 30 then has, for example in the xy Level, a cross-section in the shape of the letter U.
  • the first magnetic core segment 30 can also be E-shaped, for example, as in the illustrated exemplary embodiments.
  • the first magnetic core segment 30 then has a cross section in the form of the letter E, for example in the xy plane.
  • the second magnetic core segment 40 is, for example, I-shaped.
  • the first magnetic core segment 30 and the second magnetic core segment 40 are joined together to form a magnetic core 10 and together form a magnetic circuit.
  • the second magnetic core segment 40 is in direct contact with the first magnetic core segment 30.
  • the first magnetic core segment 30 has a base area 31 and at least two legs 32 which protrude from the base area 31.
  • the legs 32 protrude from the base area 31 , for example at ends 33 of the base area 31 .
  • the legs 32 protrude from the base area 31 in the same direction.
  • the legs 32 protrude from the base area 31 of the first magnetic core segment 30 towards the second magnetic core segment 40 .
  • the base area 31 of the first magnetic core segment 30 forms, together with the legs 32 of the first magnetic core segment 30, a U-shape, for example in the xy plane.
  • Recesses 35 are formed in the legs 32 of the first magnetic core segment 30 .
  • a recess 35 is formed in each of the two legs 32 .
  • the recesses 35 serve to accommodate the second magnetic core segment 40.
  • the second magnetic core segment 40 is fitted into the recesses 35 of the first magnetic core segment 30.
  • FIG. The second magnetic core segment 40 extends between the two legs 32 of the first magnetic core segment 30.
  • the recesses 35 in the first magnetic core segment 30 are opposite one another and face one another.
  • the two recesses 35 in the two legs 32 are mirror-symmetrical to one another in the exemplary embodiments shown.
  • Two fastening areas 43 are formed on the second magnetic core segment 40 .
  • the fastening areas 43 are arranged in the recesses 35 of the first magnetic core segment 40 .
  • the fastening areas 43 of the second magnetic core segment 40 engage in the recesses 35 of the first magnetic core segment 30 .
  • the recesses 35 can, for example, run lengthwise along the z-direction in the first magnet core segment 30 .
  • the Fastening areas 43 of the second magnetic core segment 40 are designed to complement the recesses 35 of the first magnetic core segment 30 .
  • the coil 5 surrounds the magnetic core 10, in particular the first magnetic core segment 30, in particular a leg 32 of the first magnetic core segment 30.
  • the further coil 6 surrounds the magnetic core 10, in particular the first magnetic core segment 30, in particular a leg 32 of the first magnetic core segment 30. Surrounded in this the coil 5 and the further coil 6 each have one of the legs 22 ..
  • the coils 5, 6 are designed as conductor tracks of the printed circuit board 20 in the exemplary embodiments.
  • the coils 5, 6 can also be wound around the legs 22 of the first magnetic core segment 30, for example.
  • the first magnetic core segment 30 and the second magnetic core segment 40 together form a magnetic core 10 for the coils 5,
  • the inductive assembly 1 also includes a printed circuit board 20 with a first side 23 and a second side 24 facing away from the first side 23 a printed circuit board made of glass fiber reinforced epoxy resin as a carrier material for conductor tracks.
  • the printed circuit board 20 can also be an HDI printed circuit board (High Density Interconnect printed circuit board), an LTCC (Low Temperature Cofired Ceramics) or another suitable rigid or flexible printed circuit board.
  • One or more electrical and/or electronic components, such as resistors, coils, capacitors, etc., connected to one another by conductor tracks, can be arranged on the printed circuit board 20 .
  • the conductor tracks are, for example, made in one piece from electrically conductive metal, such as copper.
  • the circuit board 20 can, of course, also have a large number of conductor tracks and, in particular, can also be in the form of a multi-layer circuit board.
  • the coil 5 is formed in the printed circuit board 20 in that a conductor track of the printed circuit board 20 runs in the printed circuit board 20 in the form of a coil 5 .
  • the conductor track forming the coil 5 can run in one layer of the printed circuit board 20 .
  • the conductor track that forms the coil 5 can also run in several layers of the printed circuit board 20 .
  • the further coil 6 is also designed as a further conductor track on the printed circuit board 20 .
  • the coil 5 and the further coil 6 are thus integrated into the circuit board 20.
  • the inductive assembly 1 also includes a first magnetic core segment 30 and a second magnetic core segment 40.
  • recesses 25 can be formed in the printed circuit board 10 through which the legs 32 of the first magnetic core segment 30 protrude from the first side 23 of the printed circuit board 20 to the second side 24 of the printed circuit board 20 .
  • the magnetic core segments 30, 40 are brought together through the printed circuit board 20 and together form a magnetically closed circuit.
  • the first magnetic core segment 30 is E-shaped.
  • the first magnetic core segment 30 has a cross section in the form of the letter E perpendicular to the printed circuit board 20 .
  • the first magnetic core segment 30 thus has a cross section in the form of the letter E in the xy plane.
  • the first magnetic core segment 30 can also have a cross section in the form of the letter U in the xy plane, for example.
  • a main part of the first magnetic core segment 30 is arranged on the first side 23 of the circuit board 20 .
  • the base area 31 of the first magnetic core segment 30 is arranged on the first side 23 of the printed circuit board.
  • the three legs 32 of the first magnet core segment 30 protrude from the base area 31 of the first magnet core segment 30 and from the first side 21 of the circuit board 20 to the second side 24 of the circuit board 20 through the circuit board 20 .
  • recesses 25 are formed in the printed circuit board 20, through which the legs 32 of the first magnetic core segment 30 protrude.
  • the second magnetic core segment 40 is I-shaped in the third exemplary embodiment.
  • the second magnet core segment 40 is arranged on the second side 24 of the circuit board 20 .
  • the second magnetic core segment 40 extends longitudinally between the two outermost legs 32 of the E-shaped first magnetic core segment 30.
  • the first magnetic core segment 30 and the second magnetic core segment 40 are joined together and together form a magnetic circuit.
  • the first magnet core segment 40 is firmly connected to the printed circuit board 20 .
  • the first magnet core segment 30 is glued to the circuit board 20 .
  • an adhesive 21 can be arranged between the circuit board 20 and the base area 31 of the first magnet core segment 30 , which adheres to the base area 31 of the first magnet core segment 30 and to the first side 23 of the circuit board 20 .
  • the inductive assembly 1 also includes a component 50.
  • a support surface 51 for example a planar one, for supporting the second magnetic core segment 40 on the component 50 is formed on the component 50.
  • the second magnetic core segment 40 rests on the bearing surface 51 of the component 50, for example flat, for example directly or with the interposition of an intermediate element.
  • the component 50 can be embodied, for example, as a housing, for example for additional electrical and/or electronic components that are not shown in the figures.
  • the circuit board 20 is firmly connected to the component 50 .
  • the circuit board 20 is connected to the component 50 in such a way that the second magnetic core segment 40 is held between the first magnetic core segment 30 and the component 50 .
  • the printed circuit board 20 can be firmly connected to the component 50 by means of at least one connecting means 22 .
  • the connecting means 22 can be designed as screws, for example.
  • the connecting means 22 are arranged, for example, on both sides of the magnet core.
  • the second magnetic core element 30 dips into the recesses 35 of the first magnetic core element 40, for example in the y-direction.
  • the second magnetic core member 30 is aligned and held within the first magnetic core member 40 .
  • the fastening areas 43 of the second magnetic core segment 40 are pushed or pressed into the recesses in the y-direction.
  • the arrangement of the fastening areas 43 in the recesses 35 in this exemplary embodiment fixes the fastening areas 43 in the first magnet core segment 30 in the x-direction and in the z-direction.
  • the arrangement of the second magnetic core segment 40 between the first magnetic core segment 30 and the component 50 fixes the fastening areas 43 of the second magnetic core segment 40 in the z-direction in the recesses 35 . This is shown in FIG. 2, which shows the first magnet core segment 30 and the second magnet core segment 40 seen from the support surface 51.
  • FIG. 2 shows the first magnet core segment 30 and the second magnet core segment 40 seen from the support surface 51.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un ensemble inductif (11) comprenant une bobine (5), un premier segment de noyau magnétique (30) et un second segment de noyau magnétique (40). Le premier segment de noyau magnétique (30) et le second segment de noyau magnétique (40) forment ensemble un noyau magnétique (10) pour la bobine (5), ladite bobine (5) s'étendant autour d'au moins une partie du noyau magnétique (10). Selon l'invention, des évidements (35) sont formés dans le premier segment de noyau magnétique (30), le second segment de noyau magnétique (40) étant au moins partiellement disposé dans les évidements (35). L'ensemble inductif (10) comprend en outre un composant (50) ayant une surface de support (51), et le second segment de noyau magnétique (40) est disposé entre le premier segment de noyau magnétique (30) et le composant (50).
PCT/EP2022/078510 2021-12-07 2022-10-13 Ensemble inductif WO2023104377A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021213878.0A DE102021213878A1 (de) 2021-12-07 2021-12-07 Induktive Baugruppe
DE102021213878.0 2021-12-07

Publications (1)

Publication Number Publication Date
WO2023104377A1 true WO2023104377A1 (fr) 2023-06-15

Family

ID=84330618

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/078510 WO2023104377A1 (fr) 2021-12-07 2022-10-13 Ensemble inductif

Country Status (2)

Country Link
DE (1) DE102021213878A1 (fr)
WO (1) WO2023104377A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012106615A1 (de) * 2012-07-20 2014-01-23 Sma Solar Technology Ag Elektronische Baugruppe
WO2016080131A1 (fr) * 2014-11-17 2016-05-26 株式会社 豊田自動織機 Appareil à induction
EP3393223A1 (fr) * 2017-04-17 2018-10-24 Yazaki Corporation Filtre de bruit et unité de réduction du bruit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012106615A1 (de) * 2012-07-20 2014-01-23 Sma Solar Technology Ag Elektronische Baugruppe
WO2016080131A1 (fr) * 2014-11-17 2016-05-26 株式会社 豊田自動織機 Appareil à induction
EP3393223A1 (fr) * 2017-04-17 2018-10-24 Yazaki Corporation Filtre de bruit et unité de réduction du bruit

Also Published As

Publication number Publication date
DE102021213878A1 (de) 2023-06-07

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