EP2580767A1 - High-power air-core smoothing inductor - Google Patents

High-power air-core smoothing inductor

Info

Publication number
EP2580767A1
EP2580767A1 EP11723968.1A EP11723968A EP2580767A1 EP 2580767 A1 EP2580767 A1 EP 2580767A1 EP 11723968 A EP11723968 A EP 11723968A EP 2580767 A1 EP2580767 A1 EP 2580767A1
Authority
EP
European Patent Office
Prior art keywords
windings
induction coil
coil
winding
turns
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.)
Granted
Application number
EP11723968.1A
Other languages
German (de)
French (fr)
Other versions
EP2580767B1 (en
Inventor
Joel Devautour
Youssef Ghorbel
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2580767A1 publication Critical patent/EP2580767A1/en
Application granted granted Critical
Publication of EP2580767B1 publication Critical patent/EP2580767B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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

Definitions

  • the invention relates to air induction coils for high power.
  • Such induction coils are for example used for the power supply of DC arc furnaces.
  • the power supplies of DC arc furnaces use air induction coils with values between 100 ⁇ and 1 mH. These coils can be traversed by currents up to 70 kA.
  • induction coils consisting of monolayer solenoids with a square or hexagonal base.
  • FIG. 1 is an explanatory diagram of an electrical installation for DC arc furnace.
  • Reference 1 designates an arc furnace containing a metallic material 2 to be treated.
  • the oven 1 is equipped, in the example shown, with a cathode 10 and two anodes 11 and 12.
  • Two power supply circuits are shown.
  • a first circuit comprises a thyristor rectifier device 3 whose output is connected between the cathode 10 and the anode 11 through an induction coil Li.
  • circuit comprises a thyristor rectifier device 4 whose output is connected between the cathode 10 and the anode 12 through an induction coil L2.
  • the coils Li and L2 are high-power air coils.
  • the present invention has been realized to optimize the induction coils of high power in order to reduce in particular their bulk and the Joule losses that they cause.
  • the subject of the invention is an air induction coil for high powers formed by winding hollow bars made of electrically conductive material, characterized in that it comprises at least two windings arranged coaxially and one inside the other, the windings being connected in series so as to maintain the same winding direction, the induction coil having a mean radius A, a half-section in a plane comprising the axis of the coil which is square-shaped with a side B, so as to satisfy the relationship: 2A ⁇ 6B ⁇ 6A.
  • the windings consist of polygonal turns, for example hexagonal turns.
  • the hollow bars may be aluminum or copper.
  • each winding can have its own cooling circuit to reduce the losses in load.
  • FIG 1, already described, is an explanatory diagram of an electrical installation for DC arc furnace, according to the prior art
  • FIG 2 is a sectional view of an induction coil, the section being made in a plane comprising the axis of the coil, according to the present invention.
  • the idea underlying the present invention consists in fitting windings (or elementary coils) into each other for build a global reel while trying to get closer to the Brooks model.
  • Brooks model was proposed in 1931 to optimize multilayer coils, based on circular turns, made with wire.
  • the air induction coil of the present invention is made from hollow bars of high section (typically of the order of 20 000 mm 2 ).
  • the optimal shape is the circular shape. This form is not excluded from the present invention, however such a geometry is difficult to achieve with bars of large section.
  • a square shaped coil is simple to make but is not optimal. The hexagon is closer to the circle and not too complex from an industrial point of view. It also has the advantage of reducing the electromagnetic forces in the corners. We could consider spirals of more complicated shapes, such as the octagon for example. However, the manufacturing cost would be higher because of the increased number of welds.
  • the conductive bars used are for example extruded aluminum. One could also use copper, or another electrically conductive material.
  • the bars being hollow, the inside forms channels allowing the circulation of a cooling fluid.
  • the coil according to the invention may have a single cooling circuit common to each winding. However, better results are obtained if each winding has its own cooling circuit. The cooling circuits are then connected in parallel.
  • the winding can be from the top down, or from the inside to the outside, or by another method. The important thing is to keep the same winding direction for the windings.
  • Figure 2 is a sectional view of an induction coil according to the present invention, the section being made in a plane comprising the axis of the coil.
  • the induction coil 20 comprises three coaxial windings: an outer winding 21, a central winding 22 and an inner winding 23.
  • Each winding comprises, in this example, five turns of polygonal shape (by hexagonal example).
  • the half-section 24 of the coil has a height B and a width C. It is located at a mean distance A from the axis of the coil. Shims of electrically insulating material are provided in the coil to support the turns of the windings and to separate the windings from each other.
  • an inductance coil according to the present invention compared to a coil of the prior art consisting of a single solenoid, of the same inductance value and of the same rod section, a reduction of 40% of weight of the reel, 25% less Joule losses and a reduced height of three times.

Abstract

The invention relates to a high-power air-core inductor (20) prepared by coiling hollow bars made of an electrically conducting material. The coil includes at least two windings (21, 22, 23) arranged coaxially one in the other, the windings being connected in series so as to preserve the same winding direction, the induction coil having a mean radius A, a half section in a plane including the axis of the coil, which is square in shape, and the side B of which is such that the relation 2A ≤ 6B ≤ 6A is satisfied.

Description

BOBINE DE LISSAGE A AIR POUR FORTES PUISSANCES  AIR SMOOTHING COIL FOR HIGH POWER
DESCRIPTIONDESCRIPTION
DOMAINE TECHNIQUE TECHNICAL AREA
L'invention se rapporte aux bobines d'induction à air pour fortes puissances. De telles bobines d'induction sont par exemple utilisées pour l'alimentation électrique des fours à arc à courant continu .  The invention relates to air induction coils for high power. Such induction coils are for example used for the power supply of DC arc furnaces.
ÉTAT DE LA TECHNIQUE ANTÉRIEURE STATE OF THE PRIOR ART
Les alimentations électriques des fours à arc à courant continu utilisent des bobines d'induction à air présentant des valeurs variant entre 100 μΗ et 1 mH . Ces bobines peuvent être parcourues par des courants pouvant aller jusqu'à 70 kA.  The power supplies of DC arc furnaces use air induction coils with values between 100 μΗ and 1 mH. These coils can be traversed by currents up to 70 kA.
Pour les applications de type four à arc électrique, il est connu d'utiliser des bobines d'induction constituées de solénoïdes monocouches à base carrée ou hexagonale.  For electric arc furnace type applications, it is known to use induction coils consisting of monolayer solenoids with a square or hexagonal base.
La figure 1 est un schéma explicatif d'une installation électrique pour four à arc à courant continu. La référence 1 désigne un four à arc contenant un matériau métallique 2 à traiter. Le four 1 est équipé, dans l'exemple représenté, d'une cathode 10 et de deux anodes 11 et 12. Deux circuits d'alimentation électrique sont représentés. Un premier circuit comprend un dispositif redresseur à thyristors 3 dont la sortie est branchée entre la cathode 10 et l'anode 11 à travers une bobine d'induction Li. Un deuxième circuit comprend un dispositif redresseur à thyristors 4 dont la sortie est branchée entre la cathode 10 et l'anode 12 à travers une bobine d'induction L2. Les bobines Li et L2 sont des bobines à air de forte puissance. Figure 1 is an explanatory diagram of an electrical installation for DC arc furnace. Reference 1 designates an arc furnace containing a metallic material 2 to be treated. The oven 1 is equipped, in the example shown, with a cathode 10 and two anodes 11 and 12. Two power supply circuits are shown. A first circuit comprises a thyristor rectifier device 3 whose output is connected between the cathode 10 and the anode 11 through an induction coil Li. circuit comprises a thyristor rectifier device 4 whose output is connected between the cathode 10 and the anode 12 through an induction coil L2. The coils Li and L2 are high-power air coils.
L'augmentation de la puissance des fours à arc électrique installés ces dernières années a provoqué l'augmentation de la valeur du courant continu à fournir et aussi l'augmentation de la valeur des bobines d'induction à air. Ceci conduit à des bobines énormes et implique des pertes Joule importantes. Ces bobines d'induction sont en outre très encombrantes. Elles posent donc divers problèmes relatifs à leur installation, leur montage, leur refroidissement ...  The increase in the power of the electric arc furnaces installed in recent years has caused the increase of the value of the direct current to be supplied and also the increase of the value of the air induction coils. This leads to huge coils and involves significant Joule losses. These induction coils are also very bulky. They therefore pose various problems relating to their installation, assembly, cooling ...
EXPOSÉ DE L' INVENTION STATEMENT OF THE INVENTION
La présente invention a été réalisée pour optimiser les bobines d'induction de fortes puissances afin de réduire notamment leur encombrement et les pertes Joule qu'elles provoquent.  The present invention has been realized to optimize the induction coils of high power in order to reduce in particular their bulk and the Joule losses that they cause.
L'invention a pour objet une bobine d'induction à air pour fortes puissances formée par bobinage de barres creuses en matériau électriquement conducteur, caractérisé en ce qu'elle comprend au moins deux enroulements disposés coaxialement et l'un dans l'autre, les enroulements étant connectés en série de façon à conserver le même sens d'enroulement, la bobine d'induction présentant un rayon moyen A, une demi- section dans un plan comprenant l'axe de la bobine qui est de forme carrée de côté B, de sorte à satisfaire la relation : 2A < 6B < 6A. The subject of the invention is an air induction coil for high powers formed by winding hollow bars made of electrically conductive material, characterized in that it comprises at least two windings arranged coaxially and one inside the other, the windings being connected in series so as to maintain the same winding direction, the induction coil having a mean radius A, a half-section in a plane comprising the axis of the coil which is square-shaped with a side B, so as to satisfy the relationship: 2A <6B <6A.
Avantageusement, les enroulements sont constitués de spires polygonales, par exemple de spires hexagonales .  Advantageously, the windings consist of polygonal turns, for example hexagonal turns.
Les barres creuses peuvent être en aluminium ou en cuivre.  The hollow bars may be aluminum or copper.
Les barres creuses formant des canaux pour la circulation d'un fluide de refroidissement, chaque enroulement peut posséder son propre circuit de refroidissement pour diminuer les pertes en charge.  The hollow bars forming channels for the circulation of a cooling fluid, each winding can have its own cooling circuit to reduce the losses in load.
BRÈVE DESCRIPTION DES DESSINS BRIEF DESCRIPTION OF THE DRAWINGS
L'invention sera mieux comprise et d'autres avantages et particularités apparaîtront à la lecture de la description qui va suivre, donnée à titre d'exemple non limitatif, accompagnée des figures annexées parmi lesquelles :  The invention will be better understood and other advantages and particularities will appear on reading the following description, given by way of non-limiting example, accompanied by the appended figures among which:
-la figure 1, déjà décrite, est un schéma explicatif d'une installation électrique pour four à arc à courant continu, selon l'art connu,  FIG 1, already described, is an explanatory diagram of an electrical installation for DC arc furnace, according to the prior art,
-la figure 2 est une vue en coupe d'une bobine d'induction, la coupe étant faite dans un plan comprenant l'axe de la bobine, selon la présente invention .  FIG 2 is a sectional view of an induction coil, the section being made in a plane comprising the axis of the coil, according to the present invention.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERS DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
L'idée qui est à la base de la présente invention consiste à emboîter des enroulements (ou bobines élémentaires) les uns dans les autres pour constituer une bobine globale tout en essayant de se rapprocher du modèle de Brooks. The idea underlying the present invention consists in fitting windings (or elementary coils) into each other for build a global reel while trying to get closer to the Brooks model.
Le modèle de Brooks a été proposé en 1931 pour optimiser des bobines multicouches , à base de spires circulaires, réalisées avec du fil.  The Brooks model was proposed in 1931 to optimize multilayer coils, based on circular turns, made with wire.
La bobine d'induction à air de la présente invention est réalisée à partir de barres creuses de forte section (typiquement de l'ordre de 20 000 mm2) . Pour une spire de la bobine, la forme optimale est la forme circulaire. Cette forme n'est pas exclue de la présente invention, cependant une telle géométrie est difficile à réaliser avec des barres de forte section. On préférera donc une spire de base de forme polygonale constituée de barres droites mises bout à bout et soudées selon un angle correspondant au polygone choisi. Une spire de forme carrée est simple à réaliser mais n'est pas optimale. L'hexagone est plus proche du cercle et pas trop complexe d'un point de vue industriel. Il présente en outre l'avantage de réduire les efforts électromagnétiques dans les angles. On pourrait envisager des spires de formes plus compliquées, comme l'octogone par exemple. Cependant, le coût de fabrication serait alors plus élevé à cause du nombre accru de soudures. The air induction coil of the present invention is made from hollow bars of high section (typically of the order of 20 000 mm 2 ). For a turn of the coil, the optimal shape is the circular shape. This form is not excluded from the present invention, however such a geometry is difficult to achieve with bars of large section. We therefore prefer a base turn of polygonal shape consisting of straight bars placed end to end and welded at an angle corresponding to the chosen polygon. A square shaped coil is simple to make but is not optimal. The hexagon is closer to the circle and not too complex from an industrial point of view. It also has the advantage of reducing the electromagnetic forces in the corners. We could consider spirals of more complicated shapes, such as the octagon for example. However, the manufacturing cost would be higher because of the increased number of welds.
La réalisation d'une simple bobine de type solénoïde ne permet pas de respecter les facteurs de forme du modèle de Brooks de manière à répondre à l'équation 2A = 3C (A étant le rayon moyen de la bobine et C le côté du carré constituant la demi-section de la bobine dans le plan contenant son axe) . En effet, cela nécessiterait d'utiliser des profilés de section très aplatie qui sont difficiles à réaliser industriellement. Les bobines de type solénoïde, lorsqu'elles sont réalisées en profilés (ou barres) refroidis par des canaux, sont alors très hautes et de grands diamètres. The realization of a simple solenoid type coil does not allow to respect the form factors of the Brooks model so as to answer the equation 2A = 3C (A being the mean radius of the coil and C the side of the square constituting the half-section of the coil in the plane containing its axis). Indeed, this would require the use of very flattened which are difficult to achieve industrially. The solenoid-type coils, when they are made of profiles (or bars) cooled by channels, are then very high and large diameters.
Le fait d'emboîter des bobines élémentaires (ou enroulements) les unes dans les autres et de les brancher en série, selon la présente invention, permet théoriquement de parvenir au modèle de Brooks (2A = 3C comme indiqué ci-dessus) . Dans la pratique, on peut se satisfaire de la relation : 3A < 6B < 5A.  The fact of fitting elementary coils (or windings) into one another and connecting them in series, according to the present invention theoretically makes it possible to arrive at the Brooks model (2A = 3C as indicated above). In practice, one can be satisfied with the relation: 3A <6B <5A.
Les barres conductrices utilisées sont par exemple en aluminium extrudé. On pourrait également utiliser le cuivre, ou un autre matériau électriquement conducteur. Les barres étant creuses, l'intérieur forme des canaux permettant la circulation d'un fluide de refroidissement. La bobine selon l'invention peut avoir un seul circuit de refroidissement commun à chaque enroulement. Cependant, de meilleurs résultats sont obtenus si chaque enroulement possède son propre circuit de refroidissement. Les circuits de refroidissement sont alors mis en parallèle.  The conductive bars used are for example extruded aluminum. One could also use copper, or another electrically conductive material. The bars being hollow, the inside forms channels allowing the circulation of a cooling fluid. The coil according to the invention may have a single cooling circuit common to each winding. However, better results are obtained if each winding has its own cooling circuit. The cooling circuits are then connected in parallel.
Le bobinage peut se faire du haut vers le bas, ou de l'intérieur vers l'extérieur, ou encore par une autre méthode. L'important est de conserver le même sens de bobinage pour les enroulements.  The winding can be from the top down, or from the inside to the outside, or by another method. The important thing is to keep the same winding direction for the windings.
La figure 2 est une vue en coupe d'une bobine d'induction selon la présente invention, la coupe étant faite dans un plan comprenant l'axe de la bobine. La bobine d'induction 20 comprend, dans cet exemple de mise en œuvre, trois enroulements coaxiaux : un enroulement extérieur 21, un enroulement central 22 et un enroulement intérieur 23. Chaque enroulement comprend, dans cet exemple, cinq spires de forme polygonale (par exemple hexagonale) . La demi-section 24 de la bobine présente une hauteur B et une largeur C. Elle est située à une distance moyenne A de l'axe de la bobine. Des cales en matériau électriquement isolant sont prévues dans la bobine pour supporter les spires des enroulements et pour séparer les enroulements entre eux . Figure 2 is a sectional view of an induction coil according to the present invention, the section being made in a plane comprising the axis of the coil. In this embodiment, the induction coil 20 comprises three coaxial windings: an outer winding 21, a central winding 22 and an inner winding 23. Each winding comprises, in this example, five turns of polygonal shape (by hexagonal example). The half-section 24 of the coil has a height B and a width C. It is located at a mean distance A from the axis of the coil. Shims of electrically insulating material are provided in the coil to support the turns of the windings and to separate the windings from each other.
Pour satisfaire le modèle de Brooks, on fait en sorte que B = C, c'est-à-dire que la demi- section 24 est un carré. De même, on choisira A et B de sorte que 3A < 6B < 5A.  To satisfy the Brooks model, we make B = C, that is, the half-section 24 is a square. Likewise, we will choose A and B so that 3A <6B <5A.
Pour une bobine d'inductance selon la présente invention, on constate, par rapport à une bobine de l'art antérieur constituée d'un simple solénoïde, de même valeur d'inductance et de même section de barre, une réduction de 40% du poids de la bobine, 25% de pertes Joules en moins et une hauteur réduite de trois fois.  For an inductance coil according to the present invention, compared to a coil of the prior art consisting of a single solenoid, of the same inductance value and of the same rod section, a reduction of 40% of weight of the reel, 25% less Joule losses and a reduced height of three times.

Claims

REVENDICATIONS
1. Bobine d'induction à air (20) pour fortes puissances formée par bobinage de barres creuses en matériau électriquement conducteur, caractérisé en ce qu'elle comprend au moins deux enroulements (21, 22, 23) disposés coaxialement et l'un dans l'autre, les enroulements étant connectés en série de façon à conserver le même sens d'enroulement, la bobine d'induction présentant un rayon moyen A, une demi- section (24) dans un plan comprenant l'axe de la bobine qui est de forme carrée de côté B, de sorte à satisfaire la relation : 1. Air induction coil (20) for high powers formed by winding hollow bars of electrically conductive material, characterized in that it comprises at least two coaxially arranged windings (21, 22, 23) and one in the other, the windings being connected in series so as to maintain the same winding direction, the induction coil having a mean radius A, a half-section (24) in a plane comprising the axis of the coil which is square-shaped on side B, so as to satisfy the relation:
2A < 6B < 6A.  2A <6B <6A.
2. Bobine d'induction selon la revendication 1, dans laquelle les enroulements sont constitués de spires polygonales. 2. Induction coil according to claim 1, wherein the windings consist of polygonal turns.
3. Bobine d'induction selon la revendication 2, dans laquelle les enroulements sont constitués de spires hexagonales. An induction coil according to claim 2, wherein the windings consist of hexagonal turns.
4. Bobine d'induction selon l'une quelconque des revendications 1 à 3, dans laquelle les barres creuses sont en aluminium ou en cuivre. An induction coil according to any one of claims 1 to 3, wherein the hollow bars are aluminum or copper.
5. Bobine d'induction selon l'une quelconque des revendications 1 à 4, dans laquelle la bobine comprend trois enroulements (21, 22, 23), chaque enroulement possédant cinq spires. 5. An induction coil according to any one of claims 1 to 4, wherein the coil comprises three windings (21, 22, 23), each winding having five turns.
6. Bobine d'induction selon l'une quelconque des revendications 1 à 5, dans laquelle les barres creuses formant des canaux pour la circulation d'un fluide de refroidissement, chaque enroulement possède son propre circuit de refroidissement. 6. An induction coil according to any one of claims 1 to 5, wherein the hollow bars forming channels for the circulation of a cooling fluid, each winding has its own cooling circuit.
EP11723968.1A 2010-06-10 2011-06-08 High-power air-core smoothing inductor Active EP2580767B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1054595A FR2961338B1 (en) 2010-06-10 2010-06-10 AIR SMOOTHING COIL FOR HIGH POWER
PCT/EP2011/059429 WO2011154422A1 (en) 2010-06-10 2011-06-08 High-power air-core smoothing inductor

Publications (2)

Publication Number Publication Date
EP2580767A1 true EP2580767A1 (en) 2013-04-17
EP2580767B1 EP2580767B1 (en) 2014-04-16

Family

ID=42947531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11723968.1A Active EP2580767B1 (en) 2010-06-10 2011-06-08 High-power air-core smoothing inductor

Country Status (6)

Country Link
EP (1) EP2580767B1 (en)
CA (1) CA2801515C (en)
FR (1) FR2961338B1 (en)
UA (1) UA107710C2 (en)
WO (1) WO2011154422A1 (en)
ZA (1) ZA201209170B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220084740A1 (en) * 2020-09-14 2022-03-17 Intel Corporation Embedded cooling channel in magnetics

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2939647A1 (en) * 1979-09-29 1981-04-23 Fried. Krupp Gmbh, 4300 Essen Induction coil for smelting oven - has hollow windings connected in pairs defining coolant circulation path
JPS57118613A (en) * 1981-01-16 1982-07-23 Kansai Electric Power Co Inc:The Refrigerant cooling equipment for electric machine coil
JPS6012711A (en) * 1983-07-01 1985-01-23 Takaoka Ind Ltd Wet type gas insulated transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011154422A1 *

Also Published As

Publication number Publication date
CA2801515A1 (en) 2011-12-15
UA107710C2 (en) 2015-02-10
WO2011154422A1 (en) 2011-12-15
FR2961338B1 (en) 2012-07-27
ZA201209170B (en) 2013-07-31
EP2580767B1 (en) 2014-04-16
FR2961338A1 (en) 2011-12-16
CA2801515C (en) 2017-11-21

Similar Documents

Publication Publication Date Title
US10699836B2 (en) Inductor and associated production method
EP2614562B1 (en) Sparkplug for an internal combustion engine
FR2992113A1 (en) ARRANGEMENT FOR THE WIRELESS TRANSMISSION OF INDUCTION ENERGY.
EP3275004B1 (en) Three-phase transformer for twelve-phase rectifier
EP2580767B1 (en) High-power air-core smoothing inductor
FR2698742A1 (en) Electromagnetic linear induction machine with optimized magnetic flux distribution and uses.
FR2812122A1 (en) Chopper feed static transformer/rectifier having stacked copper/aluminum plates with central magnetic core through hole section and outer slots forming spiral coil.
CN207069881U (en) A kind of magnetic integrated circuit and power conversion device
FR2511806A1 (en) PROCESS FOR THE SUPPLY AND DEMAGNETIZATION OF HIGH-POWER DIRECT CURRENT MAGNETS
EP2422580B1 (en) Heating device with a power inductor, power inductor and oven with such an equipment
EP2027754B1 (en) High frequency induction heating device, and induction oven equipped with such device
CN204496951U (en) The non magnetic anti-corrosion and high strength aluminum-alloy wire sheathed structure of a kind of submarine cable
CN105914017A (en) Transformer for reducing eddy current losses of coil
CN2678812Y (en) Inversion welder
CN201886894U (en) Adjustable low-voltage current transformer
FR2703819A1 (en) Multiple reactance coil with current compensation, compact design.
EP0043523A1 (en) Electrical shunt reactor for an electric power transmission line, and method of making such reactor
EP0221921B1 (en) Ironless solenoidal magnet
EP0215043B1 (en) Method for making a coil of a solenoidal magnet
EP2592743B1 (en) Converter for an electrical circuit designed to supply electrical propulsion power on board a motor vehicle
KR101243318B1 (en) Coil bobbin for superconducting magnetic energy storage
FR3058255A1 (en) HIGH VOLTAGE ELECTRICAL TRANSFORMER WITH INSULATING HOUSING
FR3100374A1 (en) Coil comprising a set of asymmetric conductive turns
WO2023135159A1 (en) Use of a litz wire to limit over-voltages in an electromechanical system
FR2730342A1 (en) Electrical transformer esp. for supply to TV resonance circuit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20121220

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DEVAUTOUR, JOEL

Inventor name: GHORBEL, YOUSSEF

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131129

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 662983

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602011006238

Country of ref document: DE

Effective date: 20140528

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BOVARD AG, CH

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 662983

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140416

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140416

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140716

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140717

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140716

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140816

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140818

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602011006238

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140608

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20150119

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140608

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602011006238

Country of ref document: DE

Effective date: 20150119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110608

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140630

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140416

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230522

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230523

Year of fee payment: 13

Ref country code: DE

Payment date: 20230523

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230523

Year of fee payment: 13

Ref country code: FI

Payment date: 20230523

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230524

Year of fee payment: 13

Ref country code: CH

Payment date: 20230702

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602011006238

Country of ref document: DE

Representative=s name: KANDLBINDER, MARKUS, DIPL.-PHYS., DE