EP4356405A1 - Transformateur matriciel - Google Patents

Transformateur matriciel

Info

Publication number
EP4356405A1
EP4356405A1 EP22734878.6A EP22734878A EP4356405A1 EP 4356405 A1 EP4356405 A1 EP 4356405A1 EP 22734878 A EP22734878 A EP 22734878A EP 4356405 A1 EP4356405 A1 EP 4356405A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
circuit board
printed circuit
matrix transformer
plates
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
EP22734878.6A
Other languages
German (de)
English (en)
Inventor
Norbert Hees
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.)
Kostal Automobil Elektrik GmbH and Co KG
Original Assignee
Kostal Automobil Elektrik GmbH and Co KG
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 Kostal Automobil Elektrik GmbH and Co KG filed Critical Kostal Automobil Elektrik GmbH and Co KG
Publication of EP4356405A1 publication Critical patent/EP4356405A1/fr
Pending legal-status Critical Current

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
    • H01F27/28—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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/2823—Wires
    • 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
    • H01F27/2847—Sheets; Strips
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H01F2027/065—Mounting on printed circuit boards
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F2038/006—Adaptations of transformers or inductances for specific applications or functions matrix transformer consisting of several interconnected individual transformers working as a whole

Definitions

  • the invention relates to a matrix transformer consisting of a body made of soft magnetic material, which forms a closed magnetic circuit through openings in at least one printed circuit board, the body having a plurality of magnet legs surrounded by current-conducting windings, the body having two parallel magnets on both sides of the printed circuit board Magnetic plates, which connects the magnet legs to one another, the windings each forming at least one magnetic field-free zone in the magnetic plates by a suitably selected winding direction.
  • Circuit board-integrated transformers are used to achieve flat designs and predictable heat dissipation. These consist of a flat, soft magnetic material, preferably ferrite, which forms a closed magnetic circuit through a number of openings in a printed circuit board, and windings formed by conductor tracks on the printed circuit board and enclosing the ferrite.
  • the windings can also be constructed using several printed circuit boards. Additional winding parts formed by electrical conductors can also be attached to this printed circuit board, which can be formed from wound wires or cut sheets, for example.
  • the windings formed by the conductor track structures are distributed over several magnet legs, which are arranged in a row and column structure. With a suitably selected direction of winding of the windings around the respective magnet legs, this arrangement forms a so-called matrix transformer.
  • a matrix transformer is described in the document US Pat. No. 4,665,357.
  • a matrix transformer has the advantage that the magnetic fluxes in it partially cancel each other out, so that the magnetic losses caused by alternating magnetic fields are also reduced.
  • a suitable arrangement of magnet legs and winding directions can be used to form at least one magnetic-field-free zone.
  • the task at hand was to achieve improved cooling and/or higher electrical power in a matrix transformer.
  • a recess is made in at least one magnetic plate within the magnetic field-free zone, through which a cooling pin connected to a heat sink is guided to a surface of the printed circuit board.
  • the invention is based on the finding that the magnetic field-free zone is not required for the function of the transformer, so that the magnetic material can be saved there and the possibility of coupling a heat sink to the transformer is thereby provided.
  • FIG. 1 shows a sectional view of a matrix transformer according to the invention
  • Figure 2 shows the basic structure of a matrix transformer
  • FIG. 3 shows the directions of flow of the matrix transformer according to Figure 2
  • FIG. 4 shows the design of a magnet plate with an opening for a cooling pin.
  • FIG. 1 The basic structure of a matrix transformer is shown schematically in FIG. This consists of a body 1 made of soft magnetic material, which forms a closed magnetic circuit through at least two openings in at least one printed circuit board.
  • FIG. 2 specifically shows four cylindrical magnet legs 2 made of a ferrite material, which are arranged next to one another in two rows and two columns, magnet legs 2 standing next to one another being at the same distance from one another.
  • the lower and upper end faces of the magnet legs 2 are each closed off by a magnet plate 5, 6.
  • One or more magnet legs 2 can also be made in one piece with one of the magnet plates 5, 6.
  • a plurality of turns 4 of an electrical conductor are indicated in each case around the magnet legs 2 . These turns 4 are formed by conductor tracks of a multi-layer printed circuit board.
  • the printed circuit board itself is not shown in FIG. 2 for clarity, but is shown in FIG. 1 as an object with reference number 3 .
  • FIG. 3 illustrates the current directions 7 in the windings around the magnet legs 2 by means of arrows drawn in, as well as the resulting magnetic flux directions 8. It can be seen that the windings around magnet legs 2 arranged adjacent to one another each have opposite current directions 7. This results in the indicated magnetic flux directions 8 in the edge areas of the upper magnetic plate 6 shown here as an example. In the central region 9 of the lower and upper magnetic plates 5, 6, the magnetic fluxes 8 largely cancel each other out, so that the central region 9 of the lower and upper magnetic plates 5, 6 is essentially free of magnetic fields. Since the respective middle area 9 of the magnet plates 5, 6 does not contribute to the function of the transformer, it can also be omitted without impairing the function of the transformer.
  • a cooling pin 12 can be inserted into this recess 10, which is connected in one piece to a solid heat sink 11 here, purely by way of example.
  • the cooling pin 12 is guided up to a surface of the printed circuit board 3 and forms a cooling surface 13 there. Since the cooling pin 12 is guided through a magnetic flux-free area of the magnetic plate 5, it can advantageously consist of a metal without further ado.
  • Magnetic flux direction middle area (magnetic field-free zone)

Landscapes

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

Abstract

L'invention concerne un transformateur matriciel, composé d'un corps en matériau magnétique doux, qui forme un circuit magnétique fermé à travers des ouvertures ménagées dans au moins une carte de circuits imprimés, le corps comportant plusieurs branches magnétiques, les spires conduisant le courant étant entourées, le corps présentant deux plaques magnétiques parallèles à la carte de circuits imprimés de part et d'autre, qui relient les branches magnétiques l'une à l'autre, les spires formant respectivement au moins une zone libre de champ magnétique dans les plaques magnétiques à l'aide d'un sens d'enroulement choisi de manière adaptée, un évidement étant ménagé dans au moins une plaque magnétique à l'intérieur de la zone libre de champ magnétique, évidement à travers lequel un tourillon de refroidissement relié à un corps de refroidissement est guidé jusqu'à une surface de la carte de circuits imprimés.
EP22734878.6A 2021-06-17 2022-06-07 Transformateur matriciel Pending EP4356405A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021003119.9A DE102021003119A1 (de) 2021-06-17 2021-06-17 Matrixtransformator
PCT/EP2022/065333 WO2022263221A1 (fr) 2021-06-17 2022-06-07 Transformateur matriciel

Publications (1)

Publication Number Publication Date
EP4356405A1 true EP4356405A1 (fr) 2024-04-24

Family

ID=82308223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22734878.6A Pending EP4356405A1 (fr) 2021-06-17 2022-06-07 Transformateur matriciel

Country Status (5)

Country Link
US (1) US20240047128A1 (fr)
EP (1) EP4356405A1 (fr)
CN (1) CN117355914A (fr)
DE (1) DE102021003119A1 (fr)
WO (1) WO2022263221A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665357A (en) 1984-04-23 1987-05-12 Edward Herbert Flat matrix transformer
US5479146A (en) 1993-07-21 1995-12-26 Fmtt, Inc. Pot core matrix transformer having improved heat rejection
US20160307695A1 (en) * 2014-03-19 2016-10-20 Ionel Jitaru Magnetic structures for low leakage inductance and very high efficiency
US10074474B2 (en) 2016-05-13 2018-09-11 Enphase Energy, Inc. Matrix planar transformer
US10910140B2 (en) * 2017-02-03 2021-02-02 Virginia Tech Intellectual Properties, Inc. Matrix transformer and winding structure

Also Published As

Publication number Publication date
WO2022263221A1 (fr) 2022-12-22
DE102021003119A1 (de) 2022-12-22
CN117355914A (zh) 2024-01-05
US20240047128A1 (en) 2024-02-08

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