EP1849169B1 - Transformer core comprising magnetic shielding - Google Patents

Transformer core comprising magnetic shielding Download PDF

Info

Publication number
EP1849169B1
EP1849169B1 EP06708170.3A EP06708170A EP1849169B1 EP 1849169 B1 EP1849169 B1 EP 1849169B1 EP 06708170 A EP06708170 A EP 06708170A EP 1849169 B1 EP1849169 B1 EP 1849169B1
Authority
EP
European Patent Office
Prior art keywords
core
screen
transformer
transformer core
shield
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.)
Not-in-force
Application number
EP06708170.3A
Other languages
German (de)
French (fr)
Other versions
EP1849169A1 (en
Inventor
Christoph PLÖTNER
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1849169A1 publication Critical patent/EP1849169A1/en
Application granted granted Critical
Publication of EP1849169B1 publication Critical patent/EP1849169B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Description

Die Erfindung betrifft einen Transformatorkern mit einem Kerninneren aus magnetisierbarem Material.The invention relates to a transformer core with a core interior of magnetizable material.

Beim Betrieb von Transformatoren entstehen neben dem im Kern kanalisierten magnetischen Hauptfluss auch magnetische Streuflüsse, die zum Teil senkrecht in die Schenkel des Transformatorkerns eintreten. Sehr häufig ist um die Außenseite des Kerninneren eine Spannvorrichtung angeordnet, die den geschichteten Kern und die den um den Kern angeordneten Spulenkörper unter axialem Druck hält.In the operation of transformers, in addition to the core channeled magnetic main flux, magnetic leakage fluxes also occur, some of them perpendicularly entering the legs of the transformer core. Very often, a tensioning device is arranged around the outside of the core, which holds the layered core and the coil body arranged around the core under axial pressure.

Transformatorkern im Sinne der Erfindung ist jeder magnetisierbare Kern für die bestimmungsgemäße Verwendung in einer elektromagnetischen Maschine, wie z.B. einem Transformator oder einer Drossel. Kerninneres im Sinne der vorliegenden Erfindung ist der magnetisierbare Teil des Transformatorskerns zur Führung des magnetischen Flusses.Transformer core according to the invention is any magnetizable core for the intended use in an electromagnetic machine, such. a transformer or a choke. The core inside in the sense of the present invention is the magnetizable part of the transformer core for guiding the magnetic flux.

Magnetische Streuflüsse erzeugen in den äußeren Kernsegmenten und/oder in der Spannvorrichtung Wirbelströme, die zu einer beträchtlichen lokalen Erwärmung des Kerns beziehungsweise der Spannvorrichtung führen können. Bisher wird diesem Problem dadurch begegnet, dass die äußeren Kernbereiche in Segmente kleiner Breite unterteilt und durch die Verwendung von schmalen oder geschlitzten Spannvorrichtungen die Leistungsverluste und die lokalen Erwärmungen reduziert werden. Nachteilig ist hierbei jedoch, dass zwar die Leistungsverluste reduziert werden können, andererseits eine lokale Erwärmung, insbesondere bei Transformatoren mit hohen Leistungen, nicht verhindert wird.Magnetic leakage fluxes generate eddy currents in the outer core segments and / or in the clamping device, which can lead to considerable local heating of the core or the clamping device. Heretofore, this problem has been addressed by dividing the outer core regions into small-width segments and reducing power losses and localized heating by using narrow or slotted clamping devices. The disadvantage here, however, that while the power losses can be reduced, on the other hand, a local warming, especially with high power transformers, is not prevented.

Ebenfalls sind aus dem Stand der Technik Abschirmungen um den gesamten Spulenkörper bekannt. So beschreibt die DE 36 27 890 A1 einen Transformator mit einer magnetischen Abschirmung und ein Verfahren zur Herstellung einer solchen Abschirmung. Gemäß der dortigen Erfindung weist der Transformator ein dreischenkliges Blechpaket mit um den mittleren Schenkel gewickelten Transformatorwicklungen auf, wobei die magnetische Abschirmung aus einem Kupferkurzschlussband besteht, das quer zur Schenkellängsrichtung um das Blechpaket und die Wicklungen geführt ist. Die DE 39 40 025 A1 offenbart eine Abschirmwicklung für Transformatoren aus magnetisierbarem Material. Die erfindungsgemäße Abschirmwicklung wird zwischen zwei Wicklungsabschnitten eines Transformators gewickelt, wobei für die Abschirmwicklung ein magnetisierbares Material mit einer geringen Permeabilität verwendet wird. Nachteilig bei diesen aus dem Stand der Technik bekannten Wicklungen ist, dass zwar äußere Störeinflüsse auf den gesamten Spulenkörper verhindert werden, dass jedoch nicht magnetische Streuflüsse innerhalb des Spulenkörpers, insbesondere auf der Kernaußenseite, unterbunden werden.Also known from the prior art shields around the entire bobbin. That's how it describes DE 36 27 890 A1 a transformer with a magnetic shield and a method for producing such a shield. According to the local invention, the transformer has a three-legged laminated core with wound around the middle leg transformer windings, wherein the magnetic shield consists of a copper shorting strip, which is guided transversely to the leg longitudinal direction around the laminated core and the windings. The DE 39 40 025 A1 discloses a shield winding for magnetizable material transformers. The shielding coil according to the invention is wound between two winding sections of a transformer, wherein a magnetizable material with a low permeability is used for the shielding winding. A disadvantage of these windings known from the prior art is that, although external disturbing influences on the entire bobbin are prevented, however, non-magnetic stray fluxes within the bobbin, in particular on the core outside, are prevented.

CH 484 499 A offenbart einen Transformatorkern gemäß dem Oberbegriff von Anspruch 1. CH 484 499 A discloses a transformer core according to the preamble of claim 1.

Aufgabe der vorliegenden Erfindung ist es daher, die auf der Außenseite des Kerninneren - und falls vorhanden innerhalb der Spannvorrichtung an der Außenseite des Kerninneren - einwirkenden magnetischen Streuflüsse zu reduzieren beziehungsweise zu verhindern.The object of the present invention is therefore to reduce or prevent the magnetic stray fluxes acting on the outside of the core interior and, if present, inside the tensioning device on the outside of the core interior.

Gelöst wird die Aufgabe durch den Gegenstand des Patentanspruchs 1. Erfindungsgemäß wird um das Kerninnere zumindest teilweise eine Abschirmung angeordnet, wobei die Abschirmung einen schichtweisen Aufbau mit mindestens einem magnetisierbaren Material aufweist. Durch die Verwendung von geschichteten magnetisierbaren Materialien, wie zum Beispiel Elektroblechen, wird der Streufluss in die Bleche geführt und verursacht in der geschichteten Abschirmung nur geringe Leistungsverluste. Aufgrund der Führung der magnetischen Streuflüsse werden in der Außenseite des Kerninneren keine Wirbelströme erzeugt, so dass die Leistungsverluste und lokalen Erwärmungen innerhalb dieser Bereiche stark reduziert beziehungsweise gänzlich vermieden werden. Die Leistungsverluste innerhalb der Abschirmung und eine lokale Erwärmung sind gegenüber einem Transformatorkern ohne erfindungsgemäße Abschirmung stark reduziert.The problem is solved by the subject matter of patent claim 1. According to the invention, a shield is at least partially disposed around the core interior, wherein the shield has a layered structure with at least one magnetizable material. The use of layered magnetizable materials, such as electrical sheets, conducts the leakage flux into the sheets and causes little power loss in the laminated shield. Due to the guidance of the magnetic leakage fluxes, no eddy currents are generated in the outer side of the core, so that the power losses and local heating within these ranges are greatly reduced or completely avoided. The power losses within the shield and local heating are greatly reduced compared to a transformer core without shielding according to the invention.

Erfindungsgemäß ist zwischen dem Kerninneren und der Abschirmung eine Vorrichtung zur Erzeugung eines axialen Druckes auf das Kerninnere angeordnet. Die Verwendung eines geschichteten Kerninneren erfordert die permanente Aufrechterhaltung eines axialen Druckes auf das geschichtete Kerninnere. Diese zumeist auch als Spannvorrichtungen bezeichneten Vorrichtungen sind unmittelbar am Kerninneren angeordnet. Aufgrund der Notwendigkeit einer hohen Festigkeit bestehen diese Vorrichtungen zur Erzeugung eines axialen Druckes häufig aus elektrisch und magnetisch leitenden Materialien, wie zum Beispiel Stahl oder anderen metallischen Blechen. Innerhalb dieser Spannvorrichtungen zur Erzeugung eines axialen Druckes werden bei magnetischen Störeinflüssen lokal hohe Erwärmungen und Leistungsverluste durch induzierte Wirbelströme hervorgerufen. Herkömmlicherweise wird die Spannvorrichtung aus geschichteten Metallen aufgebaut, die - wie die Außenbereiche des Kerninneren - zusätzlich in Segmente unterteilt sind. Dies minimiert gemäß dem Stand der Technik die maximal mögliche Leistung des Transformators unter Verwendung des beschriebenen Transformatorkerns.According to the invention, a device for generating an axial pressure on the interior of the core is arranged between the core interior and the shield. The use of a layered core interior requires the permanent maintenance of axial pressure on the layered core interior. These devices, which are usually also referred to as tensioning devices, are arranged directly on the core of the core. Because of the need for high strength, these devices for generating axial pressure often consist of electrically and magnetically conductive materials, such as steel or other metallic sheets. Within these clamping devices for generating an axial pressure locally high heating and power losses are caused by induced eddy currents in magnetic interference. Conventionally, the tensioning device is constructed of layered metals which, like the outer regions of the core interior, are additionally subdivided into segments. This minimizes the maximum according to the prior art possible power of the transformer using the described transformer core.

Erfindungsgemäß ist die Abschirmung in Segmente unterteilt. Die Unterteilung der Abschirmung in Segmente erlaubt zum einen einen schnellen und modularen Aufbau der Abschirmung um das Kerninnere beziehungsweise um die Vorrichtung zur Ausübung des axialen Druckes. Der segmentenweise Aufbau der Abschirmung erlaubt ebenfalls eine an den Transformator direkt angepasste Abschirmung zu erstellen. Hierdurch wird die Gefahr großer lokaler Überhitzungen der Vorrichtung zur Erzeugung des axialen Druckes und/oder der äußeren Kernbereiche verhindert. Es können so Transformatoren mit größeren Streuflüssen sicherer als bisher gebaut werden. Ebenfalls sind die Leistungsverluste bei der Verwendung eines erfindungsgemäßen Transformatorkerns wesentlich reduziert.According to the invention, the shield is divided into segments. The subdivision of the shield into segments allows, on the one hand, a rapid and modular construction of the shield around the interior of the core or around the device for exerting the axial pressure. The segmental structure of the shield also allows to create a shield adapted directly to the transformer. As a result, the risk of large local overheating of the device for generating the axial pressure and / or the outer core regions is prevented. In this way, transformers with larger stray fluxes can be built more reliably than before. Also, the power losses when using a transformer core according to the invention are substantially reduced.

Weiterhin können größere Leistungen pro Transformatorschenkel realisiert werden. Der segmentierte Aufbau der äußeren Bereiche des Kerninneren beziehungsweise der Spannvorrichtung kann bei einem erfindungsgemäßen Transformatorkern vollständig entfallen, wodurch ein wesentlich einfacherer und kostengünstigerer Aufbau des Transformators realisierbar ist.Furthermore, larger power per transformer leg can be realized. The segmented structure of the outer regions of the inner core or the clamping device can be completely eliminated in a transformer core according to the invention, whereby a much simpler and less expensive construction of the transformer can be realized.

Bevorzugt ist vorgesehen, dass die Länge der Abschirmung in axialer Richtung gleich oder größer als die Länge eines vorgesehenen Spulenkörpers um den Transformatorkern ist. Im Grenzfall kann die Abschirmung entlang des gesamten Transformatorschenkels angeordnet sein und so auch die negativen magnetischen Streueinflüsse auf die abschließenden Joch und weitere gegebenenfalls vorhandenen Konstruktionselemente reduzieren. Erfindungsgemäß ist vorgesehen, dass die Orientierung des schichtweisen Aufbaus der Abschirmung parallel zu einer möglichen Streuflussrichtung eines Magnetfeldes ausgerichtet ist. Die Ausrichtung kann dabei hinsichtlich der innerhalb des Transformators erzeugten oder hinsichtlich einer äußeren möglichen Streuflussrichtung parallel ausgerichtet sein. Der magnetische Fluss wird idealer Weise entlang der Schichtung geführt und somit an der Spannvorrichtung beziehungsweise von den Außenbereichen des Kerninneren weggeführt.It is preferably provided that the length of the shield in the axial direction is equal to or greater than the length of a coil former provided around the transformer core. In the limiting case, the shield can be arranged along the entire transformer leg and thus also reduce the negative magnetic stray influences on the final yoke and other optionally existing structural elements. According to the invention, it is provided that the orientation of the layered structure of the shield parallel to a possible Stray flux direction of a magnetic field is aligned. The orientation may be aligned parallel with respect to the generated within the transformer or with respect to an external possible leakage flux direction. The magnetic flux is ideally guided along the stratification and thus led away at the tensioning device or from the outer regions of the inner core.

Ein bevorzugtes Merkmal der Erfindung ist, dass das Kerninnere aus geschichteten Kernsegmenten aufgebaut ist und die Abschirmung entlang der Außenseite des äußersten Kernsegmentes oder entlang der Vorrichtung zur Erzeugung eines axialen Druckes angeordnet ist.A preferred feature of the invention is that the core interior is constructed of layered core segments and the shield is disposed along the outside of the outermost core segment or along the axial pressure generating device.

Weiterhin wird die Abschirmung gemeinsam mit dem Kerninneren mit einer - normalerweise isolierenden Bandage - fixiert. Innerhalb der Bandage ist die Abschirmung mit einem Isoliermaterial - zum Beispiel Pressspan oder Gießharz - zusätzlich fixiert und elektrisch isoliert. Idealer Weise ist das magnetisierbare Material der Abschirmung ein Elektroblech, wie es in elektromagnetischen Geräten verwendet wird.Furthermore, the shield is fixed together with the core inside with a - usually insulating bandage. Within the bandage, the shielding with an insulating material - for example, pressboard or cast resin - additionally fixed and electrically insulated. Ideally, the magnetizable material of the shield is an electrical sheet as used in electromagnetic devices.

Weitere vorteilhafte Ausgestaltungen sind den Ansprüchen zu entnehmen. Der Erfindungsgegenstand wird anhand der nachfolgenden Figuren eingehend erläutert. Es zeigt:

Fig. 1
Schematische Schnittzeichnung des erfindungsgemäßen Transformatorkerns mit zwie umliegendem Spulenkörper;
Fig. 2a
Schematische Querschnittsschnittzeichnung des erfindungsgemäßen Transformatorkerns mit zwei einstückigen Abschirmungen;
Fig. 2b
Schematische Querschnittszeichnung des erfindungsgemäßen Transformatorkerns mit zwei jeweils segmentweisen aufgebauten Abschirmungen.
Further advantageous embodiments are given in the claims. The subject invention will be explained in detail with reference to the following figures. It shows:
Fig. 1
Schematic sectional view of the transformer core according to the invention with zwie surrounding bobbin;
Fig. 2a
Schematic cross-sectional sectional view of the transformer core according to the invention with two integral shields;
Fig. 2b
Schematic cross-sectional drawing of the transformer core according to the invention with two each segmentally constructed shields.

Die Figur Fig. 1 zeigt eine schematische Schnittzeichnung des erfindungsgemäßen Transformatorkerns 1 entlang der axialen Ausrichtung des Transformatorkerns 1. Entlang der Außenseite des geschichteten Kerninneren 2 ist eine Spannvorrichtung 3 zur Erzeugung eines axialen Druckes auf das Kerninnere 2 undThe figure Fig. 1 shows a schematic sectional view of the transformer core 1 according to the invention along the axial orientation of the transformer core 1. Along the outside of the layered core 2 inside a clamping device 3 for generating an axial pressure on the inner core 2 and

die Spulenkörper 5 sichtbar. Um die Spannvorrichtung 3 ist eine Abschirmung 4 angeordnet, die ein Eindringen des Streuflusses - hervorgerufen von den elektrischen Strömen in dem umgebenden Spulenkörpern 5 - in das Kerninnere 2 und in die Spannvorrichtung 3. Kerninneres 2, Spannvorrichtung 3 und die Abschirmung 4 werden mit einer Bandage 6 fixiert. Die Bandage 6 erfüllt - bei entsprechender Materialwahl - als isolierende Umhüllung um das Kerninnere 2 eine weitere Fuktion. Die Längsachse entlang des Transformatorkerns 1 ist als gestrichelte Linie dargestellt.the bobbin 5 visible. To the clamping device 3, a shield 4 is arranged, which is an intrusion of the leakage flux - caused by the electrical currents in the surrounding bobbins 5 - in the core 2 and in the clamping device 3. Kerninneres 2, jig 3 and the shield 4 with a bandage 6 fixed. The bandage 6 meets - with appropriate choice of material - as an insulating sheathing around the inner core 2 another function. The longitudinal axis along the transformer core 1 is shown as a dashed line.

Die Figuren Fig. 2a und Fig. 2b zeigen jeweils einen Querschnitt des erfindungsgemäßen Transformatorkerns 1. Neben dem schichtweisen Aufbau der das Kerninnere 2 bildenden Kernsegmente ist eine das Kerninnere 2 umschließende Spannvorrichtung 3 deutlich sichtbar. Die Spannvorrichtung 3 kann in radialer Richtung entweder durchgehend oder segmentiert aufgebaut sein. An die Spannvorrichtung 3 gemäß der Figuren Fig. 2a und 2b schließt sich die Abschirmung 4 an. Wie in der Figur Fig. 2a dargestellt, kann die Abschirmung 4 einen schichtweisen Aufbau entlang der gesamten abzuschirmenden Fläche aufweisen. Alternativ kann gemäß Figur Fig. 2b ein segmentweiser Aufbau aus geschichteten Elementen der Abschirmung 4 im Hinblick auf einen modularen Aufbau des Transformatorkerns 1 und dessen Abschirmung vorteilhaft sein. Über eine äußere Bandage 6 wird die Abschirmung 4, die entweder den Transformatorkern 1 vollständig zumindest jedoch entlang der Ausrichtung des Joches umschließt, die Abschirmung 4 fixiert. Die Fixierung der Abschirmung 4 um das Kerninnere 2 kann alternativ über Verbindungselemente mit dem Kerninneren 2, mit der Spannvorrichtung 3 oder mit weiteren Befestigungselementen (nicht dargestellt) erfolgen. Auch eine Fixierung der Abschirmung 4 mittels der Materialfestigung der Abschirmung unter Zug oder Druck um das Kerninnere 2 bzw. die Spannvorrichtung 3 ist möglich.The figures Fig. 2a and Fig. 2b each show a cross section of the transformer core according to the invention 1. In addition to the layered structure of the inner core 2 forming core segments, a core inner 2 enclosing clamping device 3 is clearly visible. The tensioning device 3 can be constructed in the radial direction either continuously or segmented. To the clamping device 3 according to the figures Fig. 2a and 2b closes the shield 4. As in the figure Fig. 2a shown, the shield 4 may have a layered structure along the entire surface to be shielded. Alternatively, according to FIG Fig. 2b a segmented structure of layered elements of the shield 4 in view of a modular structure of the transformer core 1 and its shielding be advantageous. Via an outer bandage 6, the shield 4, which encloses either the transformer core 1 completely but at least along the orientation of the yoke, the shield 4 is fixed. The fixation of the shield 4 to the inner core 2 may alternatively via fasteners to the inner core 2, with the clamping device 3 or with other fasteners (not shown). Also a fixation of the shield 4 by means of the material consolidation of the shield under tension or pressure around the inner core 2 and the clamping device 3 is possible.

Claims (6)

  1. Transformer core (1) having a core interior (2) made from magnetizable material, wherein a screen (4) is arranged at least partially around the core interior (2), wherein the screen (4) has a laminated structure comprising at least one magnetizable material, and wherein a device (3) for producing an axial pressure on the core interior is arranged between the core interior (2) and the screen (4), characterized in that the screen (4) is subdivided into segments and the laminated structure of the screen (4) is aligned parallel with a possible stray flux direction of an external magnetic field.
  2. Transformer core (1) according to Claim 1, characterized in that the length of the screen (4) in the axial direction is equal to or greater than the axial length of the coil body (5) provided around the transformer core (1).
  3. Transformer core (1) according to one of Claims 1 to 2, characterized in that the core interior (2) is made up of laminated core segments and the screen (4) is arranged along the outside of the outermost core segment.
  4. Transformer core (1) according to one of Claims 1 to 3, characterized in that the screen (4) is fixed by means of a tape binding (6) around the screen (4).
  5. Transformer core (1) according to one of Claims 1 to 4, characterized in that an insulating material between the screen (4) and the tape binding (6) fixes the screen (4).
  6. Transformer core (1) according to one of Claims 1 to 5, characterized in that the magnetizable material of the screen (4) is an electrical steel sheet.
EP06708170.3A 2005-02-16 2006-02-10 Transformer core comprising magnetic shielding Not-in-force EP1849169B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005008302A DE102005008302B4 (en) 2005-02-16 2005-02-16 Transformer core with magnetic shielding
PCT/EP2006/050827 WO2006087294A1 (en) 2005-02-16 2006-02-10 Transformer core comprising magnetic shielding

Publications (2)

Publication Number Publication Date
EP1849169A1 EP1849169A1 (en) 2007-10-31
EP1849169B1 true EP1849169B1 (en) 2016-06-15

Family

ID=36177826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708170.3A Not-in-force EP1849169B1 (en) 2005-02-16 2006-02-10 Transformer core comprising magnetic shielding

Country Status (10)

Country Link
EP (1) EP1849169B1 (en)
KR (1) KR101003933B1 (en)
CN (1) CN101120421A (en)
BR (1) BRPI0607872A2 (en)
CA (1) CA2597934C (en)
DE (1) DE102005008302B4 (en)
MX (1) MX2007009717A (en)
RU (1) RU2412498C2 (en)
UA (1) UA88942C2 (en)
WO (1) WO2006087294A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2206126B1 (en) 2007-10-29 2012-03-14 Siemens Transformers Austria GmbH & Co. KG Transformer core having a stray field shield
KR101407884B1 (en) * 2009-11-20 2014-06-16 미쓰비시덴키 가부시키가이샤 Transformer
CN101777416B (en) * 2010-03-15 2011-12-14 贵阳新星变压器有限公司 Rectangular fillet iron core for shell type transformer
CN102163488A (en) * 2010-11-25 2011-08-24 文泽生 Amorphous oil-immersed air-core reactor with full magnetic shielding
CN106571210B (en) * 2015-10-09 2018-10-12 特变电工沈阳变压器集团有限公司 A kind of 110kV transformers
JP6857494B2 (en) * 2016-12-26 2021-04-14 株式会社日立産機システム Static induction electric device
DE102020215178A1 (en) 2020-12-02 2022-06-02 BSH Hausgeräte GmbH Transformer for a switching power supply
EP4102522A4 (en) 2021-04-19 2023-09-27 Bilyi Leonid Adamovych Three-phase transformer

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277434B (en) * 1963-09-10 1968-09-12 Westinghouse Electric Corp Magnetic and corona shield for electrical induction devices
DE1237677B (en) * 1964-08-01 1967-03-30 Siemens Ag Magnetic shield arrangement for layered iron cores of transformers and inductors
US3464041A (en) * 1968-03-06 1969-08-26 Allis Chalmers Mfg Co Electrical transformer having leakage flux shield
CH484499A (en) * 1968-06-29 1970-01-15 Bbc Brown Boveri & Cie Induction device, in particular transformer or choke coil
US3962661A (en) * 1975-04-22 1976-06-08 International Telephone And Telegraph Corporation Magnetically shunted current transformer
NL7904379A (en) * 1979-06-05 1980-12-09 Philips Nv TRANSFORMER.
JPS5793512A (en) * 1980-12-03 1982-06-10 Meidensha Electric Mfg Co Ltd Fixation of bound iron core and winding
DE3141972A1 (en) * 1981-10-22 1983-05-11 Transformatoren Union Ag, 7000 Stuttgart Iron core for electrical inductors
JPS61259512A (en) * 1985-05-14 1986-11-17 Fuji Electric Co Ltd Radial block core
DE3627890A1 (en) * 1986-08-16 1988-02-25 Philips Patentverwaltung Transformer having a magnetic screen, and a method for producing such a screen
DE3940025A1 (en) * 1989-12-04 1991-06-06 Michael Riedel Transformatoren Mains transformer with interwinding magnetic screen - uses isolating layer of ferrite or magnetic glass
EP0477413B1 (en) * 1990-09-27 1995-08-09 Siemens Aktiengesellschaft Method for reducing hysteresis and electromechanical converter with hysteresis reduction
DE10350262A1 (en) * 2002-12-16 2004-07-22 Siemens Ag Österreich Transformer having two windings e.g. for power transformer, has flexible ferrite polymer foil applied over outer winding

Also Published As

Publication number Publication date
DE102005008302B4 (en) 2010-09-02
CA2597934C (en) 2015-04-14
BRPI0607872A2 (en) 2009-10-20
UA88942C2 (en) 2009-12-10
KR101003933B1 (en) 2010-12-30
CA2597934A1 (en) 2006-08-24
RU2412498C2 (en) 2011-02-20
EP1849169A1 (en) 2007-10-31
KR20070103052A (en) 2007-10-22
DE102005008302A1 (en) 2006-08-24
WO2006087294A1 (en) 2006-08-24
CN101120421A (en) 2008-02-06
RU2007134373A (en) 2009-03-27
MX2007009717A (en) 2007-09-26

Similar Documents

Publication Publication Date Title
EP1849169B1 (en) Transformer core comprising magnetic shielding
DE2915791C2 (en) Power transformer or choke
EP2924697B1 (en) Magnetic core with plate-shaped stray body and inductive component
DE102005047451A1 (en) synchronous machine
DE19934767A1 (en) Magnetic component
DE102004025076B4 (en) Coil arrangement and method for its production
DE112015003169T5 (en) Magnetic circuit component
DE3029416C2 (en) Power transformer or reactor
EP2546842A2 (en) Coil for limiting energy
DE1256313B (en) Process for the production of a shield ring for oil-filled transformers, measuring transducers and inductors
DE102006026466B3 (en) Inductive electrical element particularly transformer, has winding conductor, particularly formed as filament, which is wounded partly around ferromagnetic core for formation of winding
DE202005008726U1 (en) Dispersive transformer e.g. for DC-DC converter power pack, has one part of winding enclosing two limbs, of which one has an air-gap
DE4208706C2 (en) Ignition coil for an ignition system of an internal combustion engine
DE19710742C2 (en) Total current converter arrangement
DE3744122A1 (en) Reversed transformer
EP2040512A2 (en) Device and method for inductive heating of an electrically conductive workpiece
EP4325536A2 (en) Magnetic core with protective casing
AT413158B (en) ELECTRIC MACHINE WITH A SHIELDING DEVICE AGAINST MAGNETIC STREUFLUSS
WO2008125288A1 (en) Electric component with winding and tapping
DE2411139C3 (en) Inductive transducer for contactless detection of the distance between two objects
DE2446583B2 (en) ADJUSTABLE, SHIELDED ELECTRIC COIL
DE102020211253A1 (en) transformer
DE2653591A1 (en) HIGH PERFORMANCE TRANSFORMER FOR ULTRA HIGH VOLTAGE
DE1452662A1 (en) Device for generating a magnetic field of high magnetic flux density
DE102020214443A1 (en) magnetic resonance imaging facility

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: 20070730

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20121008

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160108

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): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 806853

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160715

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502006014996

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160615

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

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: 20160615

Ref country code: FI

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: 20160615

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

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: 20160615

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: 20160615

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: 20160916

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

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: 20160615

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: 20160615

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: 20160615

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: 20161015

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: 20160615

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: 20160615

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

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: 20160615

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: 20161017

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: 20160615

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006014996

Country of ref document: DE

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: 20170316

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

Ref country code: BE

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

Effective date: 20170228

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: 20160615

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

Ref country code: DE

Payment date: 20170419

Year of fee payment: 12

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: 20160615

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: 20160615

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: LI

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

Effective date: 20170228

Ref country code: CH

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

Effective date: 20170228

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20171031

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

Ref country code: LU

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

Effective date: 20170210

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

Ref country code: FR

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

Effective date: 20170228

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20170228

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: 20170210

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 806853

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170210

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

Ref country code: GB

Payment date: 20180212

Year of fee payment: 13

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

Ref country code: AT

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

Effective date: 20170210

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

Ref country code: SE

Payment date: 20180208

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502006014996

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20180901

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: 20060210

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: 20160615

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190210

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

Ref country code: SE

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

Effective date: 20190211

Ref country code: CY

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

Effective date: 20160615

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

Ref country code: GB

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

Effective date: 20190210

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

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: 20160615