EP3300090B1 - Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator - Google Patents

Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator Download PDF

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Publication number
EP3300090B1
EP3300090B1 EP16306215.1A EP16306215A EP3300090B1 EP 3300090 B1 EP3300090 B1 EP 3300090B1 EP 16306215 A EP16306215 A EP 16306215A EP 3300090 B1 EP3300090 B1 EP 3300090B1
Authority
EP
European Patent Office
Prior art keywords
planar transformer
layer
layers
thermal
transformer
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
EP16306215.1A
Other languages
English (en)
French (fr)
Other versions
EP3300090A1 (de
Inventor
Philippe Vandeplassche
Thierry Scalais
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.)
Thales SA
Original Assignee
Thales SA
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Filing date
Publication date
Application filed by Thales SA filed Critical Thales SA
Priority to ES16306215T priority Critical patent/ES2909441T3/es
Priority to EP16306215.1A priority patent/EP3300090B1/de
Priority to RU2017133004A priority patent/RU2744933C2/ru
Priority to US15/711,976 priority patent/US10770220B2/en
Publication of EP3300090A1 publication Critical patent/EP3300090A1/de
Application granted granted Critical
Publication of EP3300090B1 publication Critical patent/EP3300090B1/de
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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
    • H01F27/28—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
    • H01F27/08—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
    • 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
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • H01F2027/2809—Printed windings on stacked layers
    • 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

  • planar transformer layer Disclosed are a planar transformer layer, a set of planar transformer layers, and a planar transformer.
  • planar transformers whose power is limited to 2500W at 300V, or 1400W at 2kV.
  • Limiting the power handled by a transformer involves using two to three converters each using a transformer in order to reach a total power of 5 kW.
  • a transformer capable of transferring 5 kW saves one to two converters.
  • the figure 1 illustrates a planar transformer according to the state of the art. On the right side of the figure 1 the materials are represented, and on the left part are represented the thermal fluxes.
  • a dielectric insulating layer 4 is arranged between each of the elementary coils 1, as well as between the elementary coil 1 at the base of the stack and a cold source 5 on which is arranged the stack of elementary coils.
  • Cooling such a transformer through the magnetic core implies that the heat dissipated in the conductors must pass through the dielectric layers which insulate the electrical conductors from one another and which insulate the conductors from the magnetic core. Since dielectric materials are generally poor thermal conductors, the thermal resistance between the hot spot of the conductors and the magnetic core is high (the thermal resistances of each dielectric layer are connected in series from the hot spot to the magnetic core). Furthermore, since the magnetic core is also a heat dissipation source, it does not represent a good cold source.
  • An object of the invention is to produce a transformer for transmitting electrical power of at least 5 kW with galvanic isolation under an output voltage of 300 V to 2 kV in order to supply an ion thruster for a satellite or space probe.
  • a coil turn layer of an electrical conductor of a planar transformer comprising separate electrical connections and thermal connections, a thermal connection comprising a hole provided with a protrusion in the direction of the inside the coil turn
  • planar transformer capable of transmitting an electrical power of at least 5 kW with galvanic insulation under an output voltage of 300 V to 2 kV in order to to power an ion thruster for a satellite or space probe.
  • Such a hole allows an element such as a screw to hold together a plurality of layers together.
  • planar transformer comprising at least one planar transformer layer as previously described forming a primary layer, and two secondary layers of an electrical conductor.
  • planar transformer comprising electrical connections and devoid of distinct thermal connections, the three layers being separated and covered by a dielectric material, with the exception of the thermal connection or connections of the planar transformer layer
  • Such a set of layers provides a minimum thermal path between the secondary layers and the primary layer, the assembly being thermally drained by the access of the primary layer to the heat sink.
  • This assembly is particularly interesting when the electrical insulation between secondary layers and heat sink is difficult to guarantee.
  • planar transformer comprising at least one assembly as previously described.
  • a transformer comprises a plurality of sets stacked on top of each other, in which the thermal connections of the primary layers are connected to a heat sink.
  • each set is individually drained. All the layers of the transformer are cooled by as many connections to the heat sink in parallel, which improves drainage compared to a series connection.
  • the heat sink comprises a cold source and a dielectric part surrounding a part of the primary layer comprising the separate thermal connection(s).
  • the dielectric part provides electrical insulation between the heat sink and the layers.
  • the choice of dielectric is widened thereby allowing the optimization of the thermal conductivity, and the thickness of dielectric separating the layer and the heat sink can be minimized to maximize the thermal conductivity between layer and drain.
  • the cold source comprises formwork parts and is arranged on the outer part of the heat sink, the formwork parts surrounding the dielectric part.
  • the planar transformer further comprises a magnetic core and an associated fixing element.
  • the picture 2 represents a planar transformer according to one aspect of the invention, in which an elementary coil 6 comprises one or more copper layers 7 of which at least one 7a performs the thermal function. These copper layers 7 are electrically insulated for example by a dielectric insulator 8.
  • an elementary coil or elementary assembly 6 comprises, for example, a layer 7a carrying out the thermal function, and two other 7b, conventional, do not not realizing.
  • the left part of the picture 2 represents, by arrows, the diffusion of the thermal energy in the planar transformer by the layers 7a, part of which is surrounded by a dielectric 9 close to a cold source 10.
  • a continuous thermal path or thermal drain is thus created between the coils 6 and the cold source 10.
  • the performance heat of the cold source 10 plays an important role in obtaining the final performance of the transformer.
  • the reduction in thermal resistance of the electrical conductors of the transformer makes it possible to significantly increase (more than double) the power transferred, despite an electrical output voltage multiplied by five, without increasing the volume occupied by the transformer.
  • planar transformer layer 7a is shown comprising separate electrical connections 12 and thermal connections 13.
  • the thermal connections 13, in this case four in number per layer 7a, comprise a hole 14, making it possible to hold a plurality of layers 7a together fixedly.
  • the holes 14 of the thermal connections 13 can comprise a protrusion 14a in the direction of the inside of the layer 7a. These protuberances 14a make it possible to locally maximize the thermal flow towards the cold source and this taking into account the constraint of a mechanical fixing of the transformer by means of screws.
  • the winding production technology is based on flexible circuits consisting of an electric circuit on a layer encapsulated between two layers of flexible insulation.
  • the windings produced are then stacked.
  • the figure 5 represents a stack of a plurality of sets of layers according to the figure 4 , which constitutes all of the coils of the transformer according to one aspect of the invention.
  • the assembly of the transformer is carried out as follows.
  • the four thermal drainage slots are closed by means of aluminum formwork parts 16 as well as a comb made of dielectric material 17
  • These parts, 16 and 17 play a role of sealing and reproducibility of the stack.
  • the four feet 16, 17 of a dielectric resin 18 having good thermal conductivity takes into account the voltages brought into play between the elementary coils 6 in order to guarantee electrical insulation.
  • ferrites 19 are placed around the coil made up of the stack of elementary coils 6. This transformer proposes to completely decouple the heat flux from the losses by the copper 6 and losses by the irons 19. Consequently the ferrites 19 are held mechanically by a part 20, for example made of aluminum, also playing the role of thermal drainage towards the flat base.
  • the figure 9 shows the cutting plane of the figure 7 to get the sectional view of the figure 10 .

Landscapes

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

Claims (8)

  1. Windungsschicht einer Spule eines elektrischen Leiters (7a) eines Planartransformators, umfassend elektrische Verbindungen (12) und separate thermische Verbindungen (13),
    dadurch gekennzeichnet, dass eine thermische Verbindung (13) ein mit einer Ausstülpung (14a) in Richtung des Inneren der Windung der Spule (7a) versehenes Loch (14) umfasst.
  2. Gruppe (6) von Windungsschichten einer Spule (7) für einen Planartransformator, umfassend mindestens eine Schicht eines Planartransformators nach Anspruch 1, welche eine Primärschicht (7a) bildet, und zwei Sekundärschichten eines elektrischen Leiters (7b) eines Planartransformators, welche elektrische Verbindungen (12) umfassen und nicht mit separaten thermischen Verbindungen (13) versehen sind, wobei die drei Schichten (7a, 7b) getrennt und mit einem dielektrischen Material (8) bedeckt sind, mit Ausnahme der einen oder mehreren thermischen Verbindungen der Schicht eines Planartransformators nach Anspruch 1.
  3. Planartransformator, umfassend mindestens eine Gruppe (6) nach Anspruch 2.
  4. Planartransformator nach Anspruch 3, umfassend eine Vielzahl von Gruppen (6), welche übereinander gestapelt sind, wobei die thermischen Verbindungen (13) der Primärschichten (7a) mit einer thermischen Abführung verbunden sind.
  5. Planartransformator nach Anspruch 4, wobei die thermische Abführung eine Kältequelle (10) und einen dielektrischen Teil (9) umfasst, welcher einen Teil der Primärschicht umgreift, welcher die eine oder mehreren separaten thermischen Verbindungen umfasst.
  6. Planartransformator nach Anspruch 5, wobei die Kältequelle (10) Schalungsteile (16) umfasst und an dem äußeren Teil der thermischen Abführung angeordnet ist, wobei die Schalungsteile (16) den dielektrischen Teil (9) umgreifen.
  7. Planartransformator nach einem der Ansprüche 4 bis 6, ferner umfassend einen magnetischen Kern (19) und ein zugeordnetes Befestigungselement (20).
  8. Elektronische Ausrüstung zur Umwandlung von Energie für einen Satelliten, welcher mit mindestens einem Planartransformator nach einem der Ansprüche 3 bis 7 versehen ist.
EP16306215.1A 2016-09-22 2016-09-22 Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator Active EP3300090B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES16306215T ES2909441T3 (es) 2016-09-22 2016-09-22 Capa de transformador plano, conjunto de capas para transformador plano y transformador plano
EP16306215.1A EP3300090B1 (de) 2016-09-22 2016-09-22 Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator
RU2017133004A RU2744933C2 (ru) 2016-09-22 2017-09-21 Слой планарного трансформатора, сборка слоев для планарного трансформатора и планарный трансформатор
US15/711,976 US10770220B2 (en) 2016-09-22 2017-09-21 Planar transformer layer, assembly of layers for planar transformer, and planar transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16306215.1A EP3300090B1 (de) 2016-09-22 2016-09-22 Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator

Publications (2)

Publication Number Publication Date
EP3300090A1 EP3300090A1 (de) 2018-03-28
EP3300090B1 true EP3300090B1 (de) 2022-02-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16306215.1A Active EP3300090B1 (de) 2016-09-22 2016-09-22 Schicht eines planartransformators, gesamtheit der schichten für einen planartransformator und planartransformator

Country Status (4)

Country Link
US (1) US10770220B2 (de)
EP (1) EP3300090B1 (de)
ES (1) ES2909441T3 (de)
RU (1) RU2744933C2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3826038A1 (de) * 2019-11-20 2021-05-26 EnerSys Delaware Inc. Elektrischer transformator und verfahren zur herstellung eines elektrischen transformators
US11600429B1 (en) 2020-01-24 2023-03-07 Rockwell Collins, Inc. Geometrically configurable planar wafers
FR3109400B1 (fr) 2020-04-15 2022-12-30 Abc Volet Dispositif de motorisation d’organe de fermeture ou d’occultation dans un batiment a partir d’une source d’energie solaire
FR3109479B1 (fr) 2020-04-15 2022-12-30 Abc Volet Commande d’organe d’occultation dans un batiment
DE102020214444A1 (de) 2020-11-17 2022-05-19 Siemens Healthcare Gmbh Transformator, elektrische Schaltungsanordnung und Magnetresonanzbildgebungseinrichtung
FR3129244A1 (fr) 2021-11-12 2023-05-19 Centre National De La Recherche Scientifique (Cnrs) Transformateur planaire et convertisseur electrique bidirectionnel dc-dc comportant un tel transformateur planaire

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6278353B1 (en) * 1999-11-16 2001-08-21 Hamilton Sundstrand Corporation Planar magnetics with integrated cooling
US6380834B1 (en) * 2000-03-01 2002-04-30 Space Systems/Loral, Inc. Planar magnetic assembly
JP2002175922A (ja) * 2000-12-08 2002-06-21 Sansha Electric Mfg Co Ltd 高周波大電流変圧器
JP2004303823A (ja) * 2003-03-28 2004-10-28 Tdk Corp インダクタンス部品、電源トランスおよびスイッチング電源
JP4059396B2 (ja) * 2003-03-31 2008-03-12 Ｔｄｋ株式会社 薄型大電流トランス
JP4222490B2 (ja) * 2006-09-29 2009-02-12 Ｔｄｋ株式会社 プレーナ型トランス及びスイッチング電源
EP2707883B1 (de) * 2011-05-09 2017-08-09 Metamagnetics Inc. Prozess für ferritkern-materialien mit magnetischen korngrenzen
RU130449U1 (ru) * 2013-03-13 2013-07-20 Михаил Александрович Коваленко Планарный трансформатор

Also Published As

Publication number Publication date
EP3300090A1 (de) 2018-03-28
US10770220B2 (en) 2020-09-08
RU2017133004A (ru) 2019-03-22
RU2744933C2 (ru) 2021-03-17
US20180082777A1 (en) 2018-03-22
ES2909441T3 (es) 2022-05-06
RU2017133004A3 (de) 2020-10-23

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