EP3721458B1 - Elektrisches gerät mit pressplatten zum verspannen eines magnetisierbaren kerns - Google Patents

Elektrisches gerät mit pressplatten zum verspannen eines magnetisierbaren kerns Download PDF

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Publication number
EP3721458B1
EP3721458B1 EP19700555.6A EP19700555A EP3721458B1 EP 3721458 B1 EP3721458 B1 EP 3721458B1 EP 19700555 A EP19700555 A EP 19700555A EP 3721458 B1 EP3721458 B1 EP 3721458B1
Authority
EP
European Patent Office
Prior art keywords
core
electric device
winding
another
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19700555.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3721458A1 (de
Inventor
Markus Baumann
Jonas Claus
Jörg Fröhner
Julian Kraus
Stephan Voss
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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Publication date
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Publication of EP3721458A1 publication Critical patent/EP3721458A1/de
Application granted granted Critical
Publication of EP3721458B1 publication Critical patent/EP3721458B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • 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
    • H01F27/24—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
    • H01F27/24—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
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only

Definitions

  • the invention relates to an electrical device for connection to a high-voltage line with a magnetizable core, at least one winding arranged in the vicinity of the core, and a housing filled with insulating fluid, in which at least one winding is arranged, the core being arranged at least in sections outside the housing .
  • Such an electrical device is from the WO 2016/038222 A1 already known.
  • a transformer which has an air-cooled iron core with core legs which each extend through a fluid-tight housing.
  • the two core legs are connected to one another by an upper and lower yoke, forming a closed magnetic circuit.
  • the windings of the transformer are arranged in pairs in the two adjacent housings, which are filled with an insulating fluid.
  • Two clamping frames are provided for clamping the windings on the core, each of which consists of two pressure beams lying opposite one another.
  • the two press carriers extend laterally next to the upper or lower yoke, with the clamping frame being held firmly on the core by transverse bracing of the press carriers and at the same time the electrical laminations of the core lying flat against one another being clamped together.
  • the stable mounting of the windings on the respective core limb is also effected via the press frame assembled in this way.
  • the electrical device mentioned at the outset has the disadvantage that cores that consist of two halves cannot be used with the holder presented there.
  • the object of the invention is therefore to provide an electrical device of the type mentioned at the outset, with which stable mounting of a core consisting of two halves is also made possible.
  • the invention solves this problem in that the core is arranged completely between two opposing pressure plates, between which tension elements for bracing the core extend.
  • the core is arranged overall between two press plates lying opposite one another.
  • the entire core with all its sections extends between the press plates.
  • the pressing force that is introduced into the core via the pressing plates is aligned parallel to the longitudinal direction of the windings and the core sections that extend through the windings.
  • the core parts clamped together for example core halves, can either touch on their outer contours or, if necessary, be kept at a distance from one another, so that an air gap is limited between them.
  • the pressure plates, which are connected to one another via the tension elements provide a stable holding frame which is suitable for cost-effective fixing of the core, housing and windings.
  • press plates and tension elements can be made of any material.
  • the pressure plates and tension elements are made of an electrically non-conductive material, for example a fiber-reinforced plastic.
  • the core has core limbs which are connected to one another via a lower and an upper yoke, the upper yoke abutting an upper pressure plate and the lower yoke abutting a lower pressure plate.
  • the core forms a closed magnetic circuit, which has proven to be particularly useful.
  • the core legs extend in a longitudinal direction that is aligned parallel to the pressing force.
  • the core is designed, for example, as a cut strip core, which is usually fixed with the aid of bandages or clips.
  • the bandage is placed around the cut strip core along the circumference and mechanically fixed there.
  • Bandage locks are used for fixation.
  • the necessary mechanical holding forces for the wound core are generated by the clamping tension of the bandage.
  • clips with spring properties are used, which press the core halves of the cut strip cores together.
  • Conductive metal elements are often used here, in which eddy currents are induced during operation of the electrical device, which cause losses and negatively affect the efficiency of the electrical device.
  • At least one pressure plate has a recess for receiving a section of a yoke of the core.
  • the recess is advantageously designed to be complementary in shape to the area of the yoke that is accommodated by the recess. Because of this form-complementary configuration, a more compact configuration of the electrical device according to the invention is made possible on the one hand. In addition, the assembly of the electrical device is simplified and the stability is increased.
  • the electrical device is a transformer, in particular a transformer of a rail vehicle.
  • the electrical device is designed as a choke.
  • the core has two core legs arranged parallel to one another, each core leg being surrounded by at least two windings arranged concentrically to one another.
  • the electrical device is designed as a transformer.
  • the core leg is used for inductive coupling of the concentric windings.
  • the windings are preferably arranged in a fluid-tight housing which encloses the respective core limb and is filled with a fluid, for example an ester or a mineral oil.
  • the insulating fluid not only provides the necessary electrical insulation but also cooling for the windings.
  • the housing preferably consists of an electrically non-conductive insulating material, for example a fiber-reinforced plastic or the like.
  • Each winding is advantageously arranged in a housing.
  • At least one winding is arranged between two housing cover plates of the housing, the housing cover plates being clamped together with the aid of the tension elements.
  • the tension elements are not only used to brace the core. Rather, the tension elements also enable each winding to be securely held in a defined position relative to the core.
  • the tension elements are mechanically connected to the housing cover plates, between which said winding is arranged.
  • at least two windings arranged concentrically to one another lie on each end face of a housing cover plate.
  • the housing cover plates are opposite one another, so that they can be braced against one another via the tension elements. In this way, the winding pressure required to hold the winding on the core is introduced into the windings.
  • the tension elements are threaded rods, cables, solid rods, pipes or braided cables.
  • preference is given to using threaded rods onto which clamping nuts can be screwed.
  • the threaded rods extend through openings in sections of the pressure plates or housing cover plates, so that the necessary clamping or holding forces can be generated by tightening the screws.
  • the tension elements are made of an electrically non-conductive material. Any fiber-reinforced plastics that have the necessary mechanical strength can be used here.
  • the press plate consists of one piece.
  • the pressing plate may consist of several parts. The same applies to the housing cover plates.
  • the core advantageously has two core halves which abut one another or delimit an air gap with the aid of spacers.
  • the core is a winding tape core.
  • FIG 1 shows an embodiment of the electrical device 1 according to the invention in a side view.
  • the electrical device designed as a transformer 1 has a core 2 with two core legs 3 and 4, each of which extends through one of two housings.
  • the housings are in figure 1 shown without side walls in order to reveal the outer windings 5 and 6 arranged in the housing.
  • the core legs 3 and 4 are connected to one another by an upper yoke 7 and a lower yoke 8, so that a closed magnetic circuit is created.
  • the core 2 consists of a magnetizable material, for example a ferromagnetic material, and is designed as a so-called cut tape core, which has a plurality of winding or electrical tapes that rest against one another.
  • the electrical strips are, for example, grain-oriented electrical strips or electrical sheets. Deviating from this, they consist of an amorphous material.
  • each housing shown without a side wall, which completely encloses the core limbs 3 or 4, the high-voltage winding 5 or 6, which can be seen from the outside, and a low-voltage winding (not shown in the figure) are arranged concentrically with one another.
  • the concentric windings are inductively coupled to one another by the core legs 3 and 4 .
  • the housing is filled with an insulating fluid that is used to electrically insulate the high-voltage winding 5 and the low-voltage winding also serves to cool them.
  • the high-voltage winding 5 is connected in series with the high-voltage winding 6 .
  • the housing consists of two end-side housing cover plates 9 and 10 which are connected in a fluid-tight manner to the side wall (not shown).
  • the core 2 is arranged entirely between a first press plate 11 and a second press plate 12 which face one another and are connected to one another by tension elements 13 .
  • the pulling elements are designed as threaded rods 13 which extend in a longitudinal direction and are provided with an external thread.
  • Clamping nuts 14 that can be screwed onto the threaded rods 13 can now be screwed onto the respective threaded rod 13 until the core 2 lying between the pressure plates 11 and 12 is sufficiently tightly clamped.
  • the threaded rods 13 extend through through holes provided in the case top plate 9 and the case top plate 10 . With the help of additional clamping nuts 14, the opposing housing cover plates 9 and 10 can thus also be clamped together.
  • the windings are in contact with the housing cover plates 9 and 10 either directly or via a winding ring 15 or another component, so that the tensioning of the housing cover plates 9 and 10 introduces the necessary winding pressure into the windings in order to keep them stable in the desired position on the respective core leg 3, 4 to keep.
  • a holding framework is thus provided by the pressing plates 11 , 12 , the housing cover plates 9 and 10 and the tension elements 13 .
  • the holding framework allows simple, inexpensive assembly of the electrical device 1 according to the invention. It is also possible to use cores 2 that consist of two halves. The two halves of the core 2 can rest against one another, so that a closed magnetic circuit is formed. Deviating from this, non-magnetizable spacers are provided between the core halves, which define an air gap between the halves.
  • FIG 2 shows a detailed view of the upper first press plate 11. It can be seen that this is connected to the lower press plate by a total of six threaded rods 13.
  • the upper press plate 11 has a recess 16 which is designed to complement the outer contour of the upper yoke 7 in this area.
  • the recess or indentation 16 simplifies assembly and increases the mechanical strength of the transformer 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
  • Transformers For Measuring Instruments (AREA)
EP19700555.6A 2018-01-31 2019-01-04 Elektrisches gerät mit pressplatten zum verspannen eines magnetisierbaren kerns Active EP3721458B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018201488.4A DE102018201488A1 (de) 2018-01-31 2018-01-31 Elektrisches Gerät mit Pressplatten zum Verspannen eines magnetisierbaren Kerns
PCT/EP2019/050144 WO2019149469A1 (de) 2018-01-31 2019-01-04 Elektrisches gerät mit pressplatten zum verspannen eines magnetisierbaren kerns

Publications (2)

Publication Number Publication Date
EP3721458A1 EP3721458A1 (de) 2020-10-14
EP3721458B1 true EP3721458B1 (de) 2022-03-09

Family

ID=65023877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19700555.6A Active EP3721458B1 (de) 2018-01-31 2019-01-04 Elektrisches gerät mit pressplatten zum verspannen eines magnetisierbaren kerns

Country Status (9)

Country Link
US (1) US11721471B2 (ru)
EP (1) EP3721458B1 (ru)
CN (1) CN111670481B (ru)
CA (1) CA3089164C (ru)
DE (1) DE102018201488A1 (ru)
DK (1) DK3721458T3 (ru)
PL (1) PL3721458T3 (ru)
RU (1) RU2741441C1 (ru)
WO (1) WO2019149469A1 (ru)

Family Cites Families (27)

* Cited by examiner, † Cited by third party
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AT275669B (de) * 1965-12-23 1969-11-10 Elin Union Ag Elektrisches Steuergerät mit einem Gerüst und Haltevorrichtung für einen oder mehrere mechanisch nachgiebige magnetische Ringbandkerne
DE1563243B2 (de) * 1966-08-25 1972-05-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Selbsttaetig nachstellende pressanordnung fuer wicklungen von transformatoren und drosselspulen
DE2423416A1 (de) * 1974-05-14 1975-11-27 Siemens Ag Schnittbandkern mit spannvorrichtung
DE3413359A1 (de) * 1984-04-09 1985-10-17 Transformatoren Union Ag, 7000 Stuttgart Drossel mit wicklungen um eisenkernschenkel aus eisenkernscheiben
JPH0670922B2 (ja) 1988-08-25 1994-09-07 日立金属株式会社 高電圧パルス発生装置用磁性部品
JPH04162605A (ja) * 1990-10-26 1992-06-08 Toshiba Corp 分解輸送変圧器とその輸送、組立方法
WO2000002211A1 (de) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Induktives bauteil mit einem kern
JP4240344B2 (ja) * 1998-12-29 2009-03-18 Ｎｅｃトーキン株式会社 チョークコイル
US6494617B1 (en) * 1999-04-30 2002-12-17 General Electric Company Status detection apparatus and method for fluid-filled electrical equipment
JP4038957B2 (ja) * 2000-04-11 2008-01-30 松下電器産業株式会社 変圧器
AT414075B (de) 2002-02-12 2006-08-15 Siemens Ag Oesterreich Spulenkörper und spule für leiterplattenmontage
FI120067B (fi) 2006-10-31 2009-06-15 Jarkko Salomaeki Menetelmä induktiivisen komponentin valmistamiseksi ja induktiivinen komponentti
DE102007033892A1 (de) 2007-07-20 2009-01-22 Dürr Systems GmbH Verfahren zur Prozessdiagnose und Rotationszerstäuberanordnung
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PL2426682T3 (pl) 2010-09-02 2018-07-31 Abb Schweiz Ag Uzwojony rdzeń transformatora ze strukturą wsporczą
JP2013117473A (ja) * 2011-12-05 2013-06-13 Tamagawa Seiki Co Ltd 回転角信号断線検出方法及び装置
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US9198500B2 (en) 2012-12-21 2015-12-01 Murray W. Davis Portable self powered line mountable electric power line and environment parameter monitoring transmitting and receiving system
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Also Published As

Publication number Publication date
CA3089164A1 (en) 2019-08-08
EP3721458A1 (de) 2020-10-14
CN111670481A (zh) 2020-09-15
DE102018201488A1 (de) 2019-08-01
DK3721458T3 (da) 2022-05-23
RU2741441C1 (ru) 2021-01-26
US20210050139A1 (en) 2021-02-18
US11721471B2 (en) 2023-08-08
PL3721458T3 (pl) 2022-07-25
CN111670481B (zh) 2023-08-04
WO2019149469A1 (de) 2019-08-08
CA3089164C (en) 2024-01-02

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