EP3257062B1 - Elektromagnetische induktionsvorrichtung - Google Patents

Elektromagnetische induktionsvorrichtung Download PDF

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Publication number
EP3257062B1
EP3257062B1 EP16705087.1A EP16705087A EP3257062B1 EP 3257062 B1 EP3257062 B1 EP 3257062B1 EP 16705087 A EP16705087 A EP 16705087A EP 3257062 B1 EP3257062 B1 EP 3257062B1
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EP
European Patent Office
Prior art keywords
magnetic circuit
sleeve
induction device
electromagnetic induction
electrical conductor
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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
EP16705087.1A
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English (en)
French (fr)
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EP3257062A1 (de
Inventor
Eric Touzet
Nicolas POTELLE
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Thales SA
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Thales SA
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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
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • 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
    • H01F27/28—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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/061—Winding flat conductive wires or sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2857—Coil formed from wound foil conductor
    • 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

Definitions

  • the present invention relates to the field of electromagnetic inductors and electrical transformers.
  • This type of device is for example used to produce a filter at the output of an AC / DC electric current converter. These inductors make it possible to reduce the residual variations in current and / or voltage at the output of such a converter.
  • This type of electromagnetic inductance called a coil, can also be used to produce a transformer. In this case, it is necessary to couple several coils wound around the same magnetic circuit.
  • the mass and the noise of on-board components are important parameters that one seeks to reduce.
  • the ductility of aluminum is much lower than that of copper.
  • aluminum foil is often used, which is wound to make coils.
  • the coils are wound around closed magnetic circuits to best guide the magnetic flux.
  • Magnetic circuits made in two parts are commonly used.
  • the coil or coils are produced outside the magnetic circuit, then placed on it. Once this operation has been carried out, the two parts of the magnetic circuit are assembled to close the circuit.
  • the junction between the two parts forms an air gap. It is difficult to make the two surfaces forming the air gap strictly parallel: there remains a local gap between the two parts, which it is difficult to eliminate.
  • the surfaces of the two parts intended to come into contact can be rectified in order to improve the surface finish at the junction. It is also possible to surround the magnetic circuit by means of a band surrounding it to close it. The strapping force contributes to further reduce the air gap.
  • the electric current flowing in the coils can generate mechanical vibrations in the device. These vibrations tend to separate the two parts of the magnetic circuit to reform an air gap. The vibrations can also tend to loosen the mechanical hold on the different parts of the magnetic circuit, which tends to allow the amplitude of the vibrations to increase throughout the life of the coil.
  • the induction device heats up during use. The temperature difference of the induction device between use and rest can cause expansion of the magnetic circuit and the appearance of a gap in the air gap.
  • vibrations described above also tend to generate noise which can be annoying.
  • manufacturers impose increasingly low noise levels.
  • a device for this rolling is described in the patent FR 2939559 .
  • This device uses a sleeve, also called a channel, with a circular interior section, assembled from two parts around the magnetic circuit.
  • the electrical conductor is first attached to this sleeve.
  • a drive means then rotates this sleeve, by means of a sleeve engagement means.
  • the sheet or sheets of electrical conductor are then wound around the sleeve.
  • the magnetic material used in the magnetic circuit is often a soft magnetic material, to avoid energy loss through hysteresis when imposing varying magnetic fluxes.
  • the circuit obtained makes it possible to limit the appearance of eddy currents, but the section of the magnetic circuit obtained, using this method of manufacture, is rectangular.
  • the difference in shape between the circular section of the sleeve and the rectangular section of the magnetic circuit limits the efficiency of the energy coupling between the coil and the magnetic circuit and leads to losses when using the transformer.
  • Another limitation of the device is linked to the losses by the Joule effect. They can cause the device to reach high temperatures (typically over 100 ° C.) and thus limit its use.
  • Different cooling means are generally used to reduce the temperature of electromagnetic induction devices: by liquid contact or by solid contact with a cold reservoir.
  • the invention aims to overcome at least one of the aforementioned drawbacks of the prior art.
  • An object of the invention making it possible to achieve this aim is an electromagnetic induction device comprising a closed magnetic circuit, without an air gap, at least a first part of which is substantially rectilinear and surrounded by a sleeve of the device, said sleeve being surrounded by 'an electrical conductor of the device, the electrical conductor comprising at least one metal foil electrically insulated on at least one of its faces, in which less said or each said first part of said magnetic circuit has a circular section, said magnetic circuit is laminated by several layers of magnetic material separated by an electrical insulator, and at least one said sleeve has an inner face whose shape of a section is circular and matches the shape of said magnetic circuit, and an outer face comprising curved parts and flat parts, the induction device comprising a local heat exchanger in contact with the edit magnetic circuit outside said first part or parts, said local heat exchanger comprising at least one surface conforming to the shape of said magnetic circuit and at least one flat surface, a section of said magnetic circuit being circular in shape along the
  • said magnetic circuit comprises at least a second part which has at least one flat surface.
  • several surfaces chosen from at least one said flat surface of said magnetic circuit and at least one said flat surface of said one or more local heat exchangers are coplanar and adapted to be placed in contact with at least one flat heat exchanger.
  • said magnetic circuit comprises at least one sheet of magnetic material electrically insulated on at least one of its faces and wound on at least one element chosen from at least one other said sheet of magnetic material and itself.
  • each said sleeve comprises several parts adapted to cooperate to surround said magnetic circuit.
  • At least one said sleeve comprises at least one engagement means adapted to transmit a drive to allow the rotation of each said sleeve around each said longitudinal axis of each said first part, in order to wind and store at least one said sheet electrical conductor around each said sleeve.
  • said electromagnetic induction device comprises two planar electrical conductors in electrical contact with one said electrical conductor and arranged so as to form the terminals of said electrical conductor.
  • the figure 1 presents a schematic perspective view of an electromagnetic induction device 1.
  • the magnetic circuit 2 is closed and without an air gap. In this particular embodiment, illustrating some imposing of a device according to the invention, it has a circular section along the entire circuit 2. It is surrounded by a sleeve 3 on a rectilinear part of the magnetic circuit, called first part 11.
  • the sleeve 3, in a particular embodiment of the invention, can be made from an insulating material, for example by the compact vacuum insulation process (“ Compact Vacuum Insulation ”, US 5157893 A ).
  • the magnetic circuit 2 has at least one rectilinear part, or at least, comparable to a rectilinear part in front of the length of the sleeve 3.
  • An electrical conductor 4 in sheet form is wound around the sleeve 3.
  • the sheet can be made of aluminum.
  • the sheet must be electrically insulated at least on one of its faces to keep the properties of an electromagnetic coil.
  • the oxidation of the surface of the electrical conductor 4, varnish, or glue, or a mixture of varnish and glue is used to electrically insulate the overlays of the sheet of electrical conductor 4. .
  • the figure 2 presents a schematic perspective view of a magnetic circuit 2 and of a flat heat exchanger 14.
  • the magnetic circuit 2 shown in this particular embodiment has several distinct parts: first parts 11, defined previously and parts each having at least one flat surface of said magnetic circuit 13, called second parts 12.
  • some of these flat surfaces can be coplanar and adapted to be placed in contact with a flat heat exchanger 14.
  • This configuration makes it possible to control or limit the temperature of the device. when using at high power.
  • the two plane surfaces 13 are coplanar and adapted to be brought into contact with a plane heat exchanger 14.
  • the plane heat exchanger 14 is brought into contact with two other plane surfaces 13, coplanar and not referenced by the figure.
  • the figure 3 is a schematic perspective view of part of the magnetic circuit 2 and of a local heat exchanger 15, also called cradle.
  • the local heat exchanger 15 is in contact with a portion of the magnetic circuit 2 other than a first part 11.
  • the local heat exchanger 15 has a face which matches the shape of the magnetic circuit 2 to maximize the contact surface and thus promote thermal transfer, for a given form of magnetic circuit 2.
  • the local heat exchanger 15 has at least one flat surface 22.
  • the local heat exchanger 15 has several flat surfaces 22, one of which coincides with a flat surface 13.
  • the magnetic circuit portion 2 has a circular section along the contact with the local heat exchanger 15.
  • the "A” sign of the figure 4 shows a schematic perspective view of a sleeve 3.
  • Panel “B” of the figure 4 presents a part of a sleeve 6.
  • the sleeve 3 shown is composed of two sleeve parts 6.
  • a sleeve part 6 alone cannot surround the magnetic circuit 2.
  • the figure 4 also presents means 17 for engaging the sleeves 3, which may be holes, notches, projections, tenons or mortises, depending on the embodiment. These engagement means 17 are useful during the manufacture of the device 1. Once a conductive metal sheet is hooked to the outside of the sleeve 3, a rod can come into each engagement means 17 and then transmit a driving torque which allows rotation of the sleeve 3 around the longitudinal axis of a first part 11 of the magnetic circuit 2. This rotation allows the metal foil to be wound around the sleeve 3 and thus to form a winding of electrical conductor 4 around the magnetic circuit 2.
  • the figure 4 has a sleeve whose inner face 7 has a circular section. This attribute is essential in order to be able to perform a rotation of the sleeve 3 around the magnetic circuit 2 along the longitudinal axis of a first part 11, during the manufacture of the device.
  • the outer face 8 that is to say the lateral face of the sleeve, comprises a curved part 19 and a flat part 20.
  • the outer face 8 can also be defined as an axial face: it is a surface. which can be defined by a set of straight lines parallel to the main axis of the sleeve.
  • the manufacture of the device requires the absence of too marked an angle which could induce the breakage or tearing of the sheet of electrical conductor 4 during the winding around the sleeve 3.
  • the alternation presented in figure 4 between curved part 19 and flat part 20 allows this problem to be overcome while keeping a flat part 20, useful for the electrical connections of the device 1.
  • the flat part 8 of the sleeve causes, during winding, the arrangement of a part flat sheet of a metal sheet surrounding the sleeve 3, located on the flat part 8.
  • a plane contact between the metallized sheet and another element can thus be achieved, for example allowing a transfer of heat from the electromagnetic induction device to this element . This characteristic can make it possible to cool the electromagnetic induction device.
  • the figure 5 is a schematic perspective view of part of the magnetic circuit 2, of a sleeve 3 and of an electrical conductor 4. It shows the electrical conductor 4 in sheet form wound around the sleeve 3, itself assembled around a first part 11 of magnetic circuit 2 of circular section.
  • the presence of a curved part 19 and of a flat part 20 on the outer face of the sleeve 8 has repercussions on the shape of the winding: the figure 5 has an electrical conductor winding 4, the outer part of which also has a curved part and a part plane. This attribute is also useful for the electrical connections of device 1.
  • the figure 6 is a schematic perspective view of details of a first part 11 of the electromagnetic induction device 1.
  • two plane electrical conductors 16 are in mechanical and electrical contact with the electrical conductor 4 wound around the gutter. These two plane electric conductors 16 are arranged so as to form the terminals of the electric conductor 4.
  • the plane electrical conductor 16 is in contact with the electrical conductor 4 at the start of the winding.
  • the plane electrical conductor 16 is in contact with the electrical conductor 4 at the end of the winding.
  • the flat electrical conductors 16 can be placed on the flat part 20 of the outer face 8 of the sleeve 3, and / or on the corresponding flat parts of the electrical conductor winding 4. This characteristic makes it possible to bend the flat electrical conductors 16. The bending of the conductors makes it possible to facilitate the electrical connection to the outside of the device 1.
  • the figure 7 is a schematic view from above of two windings of magnetic material 21.
  • Part A of the figure 7 describes a simple winding 21 of magnetic material: a single sheet of magnetic material 18 is wound on itself. This sheet 18 is covered on at least one of its faces by an electrical insulator.
  • this insulator can be either varnish, or glue, or both.
  • the magnetic circuit 2 formed by the winding 21 simple form a succession of layers between magnetic material and electrical insulator.
  • This configuration makes it possible to avoid the appearance of eddy currents by stratifying the magnetic circuit 2. These currents, when they exist, lead to energy losses linked to the electrical resistivity of the magnetic material.
  • this type of winding makes it possible to create a magnetic circuit with a round section. In fact, starting from a sheet of magnetic material 18 of variable width, the width of this sheet 18 can, for a fixed point of the magnetic circuit 2 and at each turn of the winding, increase or decrease appreciably. This width is not visible on the figure 7 because the schematic representation is seen from above.
  • the number of windings can be between 20 and 600.
  • Part B of the figure 7 presents a winding 21 of several sheets of magnetic material 18 for the manufacture of the magnetic circuit 2.
  • a first sheet of magnetic material 18 is wound around two sheets of magnetic material 18, wound on themselves. This configuration makes it possible to multiply the branches of the magnetic circuit 2 in the case of applications such as the selection of the voltage ratio in a transformer.
  • a winding 21 can be made by several sheets of magnetic material 18, the width of which increases for each of the sheets 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • General Induction Heating (AREA)

Claims (8)

  1. Elektromagnetische Induktionsvorrichtung (1), umfassend einen geschlossenen Magnetkreis (2) ohne Spalt, von welchem mindestens ein erster Teil (11) im Wesentlichen geradlinig und durch eine Muffe (3) der Vorrichtung umgeben ist, wobei die Muffe (3) durch einen elektrischen Leiter (4) der Vorrichtung umgeben ist, wobei der elektrische Leiter (4) mindestens eine auf mindestens einer ihrer Seiten elektrisch isolierte Metallfolie umfasst, wobei:
    - mindestens der oder jeder erste Teil (11) des Magnetkreises (2) einen kreisförmigen Querschnitt aufweist;
    - der Magnetkreis (2) durch mehrere Schichten magnetischen Materials geschichtet ist, welche durch einen elektrischen Isolator getrennt sind, und
    - mindestens eine Muffe (3) eine Innenseite (7) umfasst, wobei die Querschnittsform kreisförmig ist und an die Form des Magnetkreises (2) angepasst ist, und eine äußere Seite (8), welche gekrümmte (19) und ebene (20) Teile aufweist,
    wobei die Induktionsvorrichtung einen lokalen Wärmetauscher (15) in Kontakt mit dem Magnetkreis (2) außerhalb des oder der ersten Teile (11) umfasst, wobei der lokale Wärmetauscher (15) mindestens eine Fläche, welche an die Form des Magnetkreises (2) angepasst ist und mindestens eine ebene Fläche (22) umfasst, wobei ein Querschnitt des Magnetkreises (2) kreisförmig entlang des Kontakts mit dem lokalen Wärmetauscher (15) ist.
  2. Elektromagnetische Induktionsvorrichtung (1) nach dem vorhergehenden Anspruch, wobei mindestens eine Muffe (3) eine Hauptachse, eine innere Seite (7), wobei die Querschnittsform davon kreisförmig ist und an der die Form des Magnetkreises (2) angepasst ist, und eine äußere Seite (8) umfasst, welche durch eine Reihe von zur Hauptachse parallelen Geraden definiert wird, welche gekrümmte (19) und ebene Teile (20) umfasst.
  3. Elektromagnetische Induktionsvorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei der Magnetkreis (2) davon mindestens einen zweiten Teil (12) umfasst, welcher mindestens eine ebene Fläche (13) aufweist.
  4. Elektromagnetische Induktionsvorrichtung (1) nach Anspruch 3, wobei mehrere Flächen davon, welche aus mindestens einer ebenen Fläche des Magnetkreises (13) und mindestens einer ebenen Fläche des lokalen Wärmetauschers (22) ausgewählt sind, koplanar und geeignet sind, um mit mindestens einem ebenen Wärmetauscher (14) in Kontakt gebracht zu werden.
  5. Elektromagnetische Induktionsvorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei der Magnetkreis (2) davon mindestens eine Folie aus magnetischem Material (18) umfasst, welche elektrisch auf mindestens einer ihrer Seiten isoliert und an mindestens einem Element eingerollt ist, welches ausgewählt ist aus mindestens einer anderen Folie aus magnetischem Material (18) und ihr selbst.
  6. Elektromagnetische Induktionsvorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei jede Muffe (3) davon mehrere Teile (6) umfasst, welche geeignet sind, zusammenzuarbeiten, um den Magnetkreis (2) zu umgeben.
  7. Elektromagnetische Induktionsvorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei mindestens eine Muffe (3) davon mindestens ein Eingriffsmittel (17) umfasst, welches geeignet ist, einen Antrieb zu übertragen, um die Rotation einer jeden Muffe (3) um eine jede Längsachse eines ersten Teils (11) zu ermöglichen, um mindestens einen elektrischen Leiter (4) als Folie rund um die Muffe (3) aufzurollen und zu verstauen.
  8. Elektromagnetische Induktionsvorrichtung (1) nach einem der vorhergehenden Ansprüche, welche zwei ebene elektrische Leiter (16) in elektrischem Kontakt mit einem elektrischen Leiter (4) umfasst, welche so angeordnet sind, dass sie die Klemmen des elektrischen Leiters (4) bilden.
EP16705087.1A 2015-02-13 2016-02-11 Elektromagnetische induktionsvorrichtung Active EP3257062B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1500283A FR3032831B1 (fr) 2015-02-13 2015-02-13 Dispositif d'induction electromagnetique a configuration de circuit magnetique multiple
PCT/EP2016/052926 WO2016128520A1 (fr) 2015-02-13 2016-02-11 Dispositif d'induction electromagnetique a configuration de circuit magnetique multiple

Publications (2)

Publication Number Publication Date
EP3257062A1 EP3257062A1 (de) 2017-12-20
EP3257062B1 true EP3257062B1 (de) 2020-12-23

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ID=54185997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16705087.1A Active EP3257062B1 (de) 2015-02-13 2016-02-11 Elektromagnetische induktionsvorrichtung

Country Status (7)

Country Link
US (2) US10475566B2 (de)
EP (1) EP3257062B1 (de)
CN (1) CN107251172B (de)
CA (1) CA2976293C (de)
ES (1) ES2862550T3 (de)
FR (1) FR3032831B1 (de)
WO (1) WO2016128520A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108335901B (zh) * 2017-12-18 2020-03-24 武汉纺织大学 一种缠绕曲线形微细丝电磁线圈自动绕线机

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FR2939559B1 (fr) * 2008-12-05 2011-12-09 Thales Sa Dispositif de roulage de bobine electromagnetique
CN102306541A (zh) * 2011-05-27 2012-01-04 广东海鸿变压器有限公司 树脂浇注立体卷铁心非晶合金干式变压器
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CN203415373U (zh) * 2013-07-05 2014-01-29 赣州市超越精密电子有限公司 一种组合式变压器骨架

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Also Published As

Publication number Publication date
US10475566B2 (en) 2019-11-12
CN107251172B (zh) 2020-07-31
US20200035397A1 (en) 2020-01-30
CA2976293C (en) 2023-04-25
CA2976293A1 (en) 2016-08-18
EP3257062A1 (de) 2017-12-20
ES2862550T3 (es) 2021-10-07
US20180012694A1 (en) 2018-01-11
WO2016128520A1 (fr) 2016-08-18
FR3032831A1 (fr) 2016-08-19
FR3032831B1 (fr) 2018-11-23
US10593460B2 (en) 2020-03-17
CN107251172A (zh) 2017-10-13

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