WO2013143865A1 - Transformateur et procédé de fabrication dudit transformateur - Google Patents

Transformateur et procédé de fabrication dudit transformateur Download PDF

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Publication number
WO2013143865A1
WO2013143865A1 PCT/EP2013/055247 EP2013055247W WO2013143865A1 WO 2013143865 A1 WO2013143865 A1 WO 2013143865A1 EP 2013055247 W EP2013055247 W EP 2013055247W WO 2013143865 A1 WO2013143865 A1 WO 2013143865A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
cylinder
winding
electrically conductive
layer
Prior art date
Application number
PCT/EP2013/055247
Other languages
German (de)
English (en)
Inventor
Daniel Hörmann
Andre Silbernagel
Sebastian Wittemann
Ingo Gerd Zehner
Markus Baumann
Reinhold Beck
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN201380015198.4A priority Critical patent/CN104170035B/zh
Publication of WO2013143865A1 publication Critical patent/WO2013143865A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • 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
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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

Definitions

  • the invention relates to a transformer having a high-voltage primary winding and a low-voltage secondary winding, which are arranged concentrically to each other and to a magnetically conductive core in a tube winding assembly, and a method for producing such a transformer.
  • the input terminal behavior of a transformer can be described using a complex resistor, referred to below as input impedance.
  • input impedance In a transformer as capacitances, inductances and ohmic resistances in the manner of a linear network are linked, the conductingsim ⁇ impedance of the transformer generally from the frequency of a voltage applied to a high-voltage primary winding sinusoidal alternating voltage, hereafter referred to as operating frequency dependent.
  • Winding arrangements in which different windings are arranged concentrically with each other around the magnetically conductive core are referred to as tube windings.
  • Such tube windings may be formed as a layer winding, wherein a plurality of consecutive turns of a conductive wire elekt ⁇ driven in an axial direction next to one another are arranged as a layer. In this case, several layers lying one above the other in a radial direction form a winding.
  • Such tube windings may also be formed as a coil winding, wherein a plurality of continuous turns of an electrically conductive wire in the radial direction are arranged one above the other as a coil. In this case, a plurality of adjacent coils in the axial direction form a winding. Furthermore, tube winding arrangements are possible in which at least one winding is designed as a coil winding and at least one further winding as a layer winding.
  • transformers emit electromagnetic interference radiation. At a given operating frequency, the power of the electromagnetic interference radiation increases with decreasing input impedance of the transformer.
  • the input impedance above a limit frequency for example above 10 kilohertz
  • a transformer having a high-voltage primary winding in the coil winding is higher than in a running in position winding high-voltage primary winding.
  • the invention has for its object to provide an improved transformer with a high-voltage primary winding and a secondary subvoltage winding in tube winding assembly. Furthermore, the invention has for its object to provide a method for producing such a transformer.
  • a shield cylinder is arranged concentrically between the high-voltage primary winding and the undervoltage secondary winding and comprises at least one approximately cylindrical surface to the cylinder concentric electrically conductive ⁇ shielding layer, which is electrically connected to a ground contact of the transformer.
  • the concentric arrangement of the high-voltage primary winding and the secondary low-voltage secondary winding causes, in addition to the inductive coupling between the two windings, the formation of an electrical capacitor in the manner of a cylinder capacitor.
  • the input impedance of the high-voltage primary winding is thus fundamentally influenced by the winding inductance, the ohmic line resistance and the capacitance of the windings.
  • the magnitude of the capacitive portion of the input impedance of the high voltage primary winding is inversely proportional to the operating frequency of the transformer, while the magnitude of the inductive portion of the input impedance is proportional to the operating frequency and the magnitude of the ohmic portion of the input impedance is independent of the operating frequency.
  • the noise current absorbed by the high-voltage primary winding is thus limited by the inductance at low operating frequencies and by the capacity of the high-voltage primary winding at high operating frequencies.
  • the amount of the input impedance is thus increased, in particular in high ranges of the operating frequency, for example at an operating frequency of more than 10 kilohertz. This also reduces the capacitively transmitted electrical power. This causes a reduction in the radiated interference power.
  • Winding in a transformer in layer winding arrangement thus possible to comply with upper limits for the radiated interference power, which would be met without this arrangement of a screen cylinder only by using a coil winding arrangement.
  • the use of the invention therefore makes it possible to use a less expensive production technique in the manufacture of a transformer with a predetermined operating behavior.
  • the high-voltage primary winding lies in the radial direction on the outside and is designed as a layer winding. Furthermore, the inductive coupling is particularly large in a concentric arrangement of the secondary subvoltage winding within the high-voltage primary winding, since in this case a particularly large proportion of the magnetic leakage flux generated by the high-voltage primary winding flows through the lower-voltage secondary winding.
  • the arrangement of a screen cylinder between a radially inferior secondary subvoltage winding and an external high voltage primary winding reduces the manufacturing cost of a transformer since this allows the use of a layer winding assembly for the high voltage primary winding.
  • the secondary subvoltage secondary winding is designed as a traction secondary winding for supplying an electric drive machine of a vehicle, has a smaller number of windings than the high-voltage primary winding and is arranged concentrically within the screen cylinder.
  • the supplied from the catenary wire upper voltage is ⁇ dependent of the traction current system at several kilovolts, for example, at 15 kilovolts.
  • the traction voltage used to power the prime mover is in the range of several hundred volts to about 2 kilovolts.
  • the conversion of the upper ⁇ voltage in the traction voltage is made by a designated transformer as a transformer.
  • the operators of railway systems specify frequency-dependent limits for the interference power, which may be radiated maximum by a traction transformer.
  • the high-voltage primary winding is arranged concentrically around the lower-voltage secondary winding, referred to as traction secondary winding.
  • traction secondary winding a particularly large proportion of the magnetic flux generated by the high-voltage primary winding is passed through the traction secondary winding.
  • the concentric arrangement of a screen cylinder Zvi ⁇ rule traction secondary winding and the high-voltage primary winding, the capacitive voltage transmission in the manner described reduces comparable in the high-voltage primary winding, and thus the lowering of impedance values at Fri ⁇ frequencies above a limit frequency, for example above 10 kilohertz, prevents or reduced, and thus reduces the power of the emitted interference radiation, especially in the range of high frequencies, for example above 10 kilohertz.
  • the formation of the high-voltage primary winding as a layer winding thus made possible on the one hand a cost advantage. Part against the more complex coil winding while maintaining the requirements with regard to the radiated interference power.
  • the invention advantageously makes it possible to make optimal use of the installation space, which is often limited in vehicles, for a traction transformer, since further measures for changing the impedance curve, for example by changing the dimensions or the geometry of the traction transformer, can be dispensed with.
  • a further advantage of the invention is that traction transformers, which hitherto have violated specifications of a railway system operator with regard to the radiated interference power, are modified by the insertion of an umbrella cylinder according to the invention in such a way that compliance with these specifications is achieved.
  • the shield cylinder comprises an inner insulating cylinder made of electrically insulating material located in a radial direction inside
  • the high-voltage primary winding, the secondary secondary winding and the electrically conductive shielding layer are each electrically insulated from each other by this embodiment.
  • the shielding layer comprises at least one ring around the cylinder axis arranged annular band of electrically conductive material, at least one longitudinally extending in the axial direction longitudinal band of electrically conductive material and a flexible, tube-like arranged around the entirety of these bands sheath of electrically conductive material, wherein the bands are electrically connected to each other and with the enclosure.
  • a material can be used with a poorer Stromlei ⁇ processing behavior for full-surface covering of the Schirmungsge- flechts.
  • a flexible material in ⁇ example in the form of a guide paper or a Kupferge ⁇ web, is particularly suitable for this, since the transformation and adjustment effort is particularly low.
  • the enclosure of the shielding mesh made of conductive Materi ⁇ al takes on parts of the electric field, which penetrate into the gaps between the annular bands and longitudinal bands. Since the enclosure is electrically connected to the annular bands and longitudinal bands, the flow of current in the enclosure is on the
  • a material with a higher resistivity can also be used.
  • a particularly advantageous embodiment of the invention is / are at least one annular band and / or the min ⁇ least a longitudinal band made of copper. Since copper has a low specific resistance, it is particularly suitable to dissipate electrical current from a larger surface area of the sheath of the shielding braid.
  • the distances between the annular bands can be made larger than would have been possible with a material having a higher resistivity.
  • At least one first layer Isolationspa ⁇ pier is disposed between the inner insulation cylinder and the shield braid .
  • the inner insulating cylinder is protected from mechanical damage during the application of the annular bands by the application of insulating paper. This further reduces the risk of too low Iso ⁇ lationswiderstands between the Schirmungslage of Schirmzy- Linders and the traction secondary winding.
  • At least one second layer of insulating paper is arranged between the outer insulation cylinder and the sheath of the shielding braid.
  • the second layer of insulating paper effects protection of the outer insulating cylinder from mechanical damage by the envelope of flexible electrical material and the underlying annular bands and longitudinal strips.
  • the sheathing of the shielding braid is formed as an electrically conductive guide paper or as a copper mesh.
  • the installation of the transformer is particularly facilitated by the use ei ⁇ nes flexible electrically conductive material, as this can be compensated for one tolerance variations in the diameter of the underlying traction secondary winding.
  • a heat-conducting device is arranged between the umbrella cylinder and at least one of the windings.
  • a heat-conducting device has at least one oil channel for transporting transformer oil.
  • the transformer When the transformer is filled with transformer oil, the windings are completely enclosed by the transformer oil. This allows a good heat transfer from the winding wire to the surrounding transformer oil. This in turn can deliver the heat to the transformer housing and / or to cooling devices, for example in the manner of a fan-cooled bathtau ⁇ shear.
  • An oil passage allows an improved circulation of the transformer oil between the inner coil portions and oil reservoirs, which are in direct contact with the transformers Torge ⁇ housing and / or cooling devices.
  • an oil passage between an insulating cylinder and a winding an interruption of the oil flow through the insulating cylinder is avoided.
  • Advantageously characterized heated transformer oil can spread easily from the area enclosed by the Schirmzy ⁇ relieving area in an outer, cooled area.
  • a first oil channel is arranged around a traction secondary winding
  • an inner insulating cylinder is arranged around the first oil channel
  • the ring bands are electrically conductively connected together by at least one longitudinal band to form a shielding braid
  • an outer insulation cylinder is arranged around the at least second layer of insulating paper
  • a second oil channel is arranged around the outer insulation cylinder
  • a particular advantage of this method is the execution of the high-voltage primary winding in a layer winding arrangement, which is easier to produce compared to another winding arrangement, for example to a coil winding arrangement.
  • the fabrication of a high voltage primary winding of a traction transformer in sheet winding assembly by a single operator is possible while often requiring two processors for fabrication in coil winding assembly.
  • FIG. 1 schematically shows the profile of the input impedance of a traction transformer along an impedance axis Z versus the frequency along a frequency axis f of the prior art in a double logarithmic representation.
  • the target impedance curve 1 indicates the purpose mi ⁇ nimal required impedance in a critical Frequency Ranges ⁇ rich, for example, between 100 hertz and 150 kilohertz to.
  • Shield cylinder which is typically located in an upper fre- range, for example, above 10 kilohertz, the target impedance curve 1 falls below.
  • This reduced impedance is caused at high frequencies by the capacitive component of the impedance, which is known to be inversely proportional to the frequency in magnitude. This causes an interference radiation that is above the permitted limit pointwise or over frequency ranges.
  • Figures 2 and 3 show schematically sectional views of an embodiment for the coaxial arrangement of a screen cylinder 6 between a traction secondary winding 3 and a high-voltage primary winding 4 of a transformer T. Both windings 3, 4 are also arranged concentrically to each other and to a magnetically conductive core 5.
  • Figure 2 shows a section in the axial direction through a tube winding assembly with umbrella cylinder 6
  • Figure 3 shows a section in the radial direction R.
  • the umbrella cylinder 6 comprises an insulating cylinder 6.1 which is located in a radial direction R and an insulation cylinder 6.2 which is external in a radial direction R and an electrically conductive shielding layer 6.3 arranged between the insulation cylinders 6.1, 6.2.
  • cooling devices between the umbrella cylinder 6 and at least one winding 3, 4, for example oil channels for transporting transformer oil.
  • the electrically conductive shielding layer 6.3 comprises a plurality of concentric with the core 5, the traction secondary winding 3 and the inner insulation cylinder 6.1 arranged ring binder 6.3.1 made of electrically conductive material. These annular bands 6.3.1 are arranged along an axial direction A at approximately equal intervals and with at least one Longitudinal band 6.3.2 electrically conductive material electrically connected to each other.
  • FIG. 4 shows schematically further details of the shielding layer 6.3.
  • the inner Isolationszylin ⁇ 6.1 not shown here surrounds the traction secondary winding 3. He can also optionally enclose an oil passage.
  • To this inner insulation cylinder 6.1 several layers of insulation paper are wound.
  • the annular bands 6.3.1 are arranged and fixed with adhesive tape 6.3.3.
  • annular bands 6.3.1 at least one extended in the axial direction A longitudinal ⁇ 6.3.2 band is arranged, fixed with tape 6.3.3 and electrically connected to the ring bands 6.3.1.
  • the envelope of flexible, electrically conductive material is arranged above the annular bands 6.3.1 and the at least one longitudinal band 6.3.2.
  • the shielding layer 6.3 extends over the entire length of the windings 3, 4.
  • At least one longitudinal band is verbun 6.3.2 by means of a cable shoe ⁇ 6.3.4 with the earth contact of the transformer T ⁇ .
  • FIG. 5 schematically shows the impedance curve 2.2 of FIG.
  • the impedance curve 2.2 with umbrella cylinder thus lies in the entire specified frequency range above the values which are predetermined by the desired impedance curve 1. This ensures that the specified upper limits for the radiated interference power are maintained by the transformer T with umbrella cylinder 6.

Abstract

L'invention concerne un transformateur (T) comprenant un enroulement primaire haute tension (4) et un enroulement secondaire basse tension à bobinage concentrique, ainsi qu'un cylindre de blindage (6) disposé concentriquement entre lesdits enroulements. Selon l'invention, le cylindre de blindage (6) comprend au moins une couche de blindage (6.3) électriquement conductrice, qui est approximativement concentrique à l'enveloppe du cylindre et qui est reliée électriquement à un contact de mise à la terre du transformateur (T).
PCT/EP2013/055247 2012-03-27 2013-03-14 Transformateur et procédé de fabrication dudit transformateur WO2013143865A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380015198.4A CN104170035B (zh) 2012-03-27 2013-03-14 变压器和用于制造变压器的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12161388.9A EP2645384B1 (fr) 2012-03-27 2012-03-27 Transformateur et procédé de fabrication d'un transformateur
EP12161388.9 2012-03-27

Publications (1)

Publication Number Publication Date
WO2013143865A1 true WO2013143865A1 (fr) 2013-10-03

Family

ID=47915183

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/055247 WO2013143865A1 (fr) 2012-03-27 2013-03-14 Transformateur et procédé de fabrication dudit transformateur

Country Status (4)

Country Link
EP (1) EP2645384B1 (fr)
CN (1) CN104170035B (fr)
PL (1) PL2645384T3 (fr)
WO (1) WO2013143865A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11527934B2 (en) 2018-03-13 2022-12-13 Rolls-Royce Deutschland Ltd & Co Kg Electrical machine with voltage detection circuit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103996507B (zh) * 2014-05-26 2016-02-24 中国铁路总公司 卷铁芯牵引变压器
CN104916413B (zh) * 2015-06-05 2017-10-17 卧龙电气集团股份有限公司 一种AT供电330kV牵引变压器引线容性屏蔽结构
CN105097253A (zh) * 2015-09-16 2015-11-25 浙江江山变压器股份有限公司 油浸式变压器局部放电试验用抑制电源干扰的隔离变压器
CN107978441A (zh) * 2017-11-11 2018-05-01 河南森源电气股份有限公司 Gis电流互感器及其屏蔽筒
AT522601A1 (de) * 2019-05-13 2020-12-15 Omicron Electronics Gmbh Hochspannungstransformator, Verfahren zum Herstellen eines Hochspannungstransformators sowie Prüfsystem und Prüfsignalvorrichtung mit einem Hochspannungstransformator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678428A (en) * 1971-05-17 1972-07-18 Westinghouse Electric Corp Interwinding shield for power transformers
EP0466642A1 (fr) * 1990-07-10 1992-01-15 H. Weidmann AG Blindage pour un dispositif électrique
WO2006103193A2 (fr) * 2005-04-01 2006-10-05 Siemens Aktiengesellschaft Transformateur pourvu d'un blindage electrique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176334A (en) * 1975-08-25 1979-11-27 Hughes Aircraft Company High voltage transformer and process for making same
CN2416585Y (zh) * 2000-03-15 2001-01-24 顺德特种变压器厂 户外式柱上干式变压器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678428A (en) * 1971-05-17 1972-07-18 Westinghouse Electric Corp Interwinding shield for power transformers
EP0466642A1 (fr) * 1990-07-10 1992-01-15 H. Weidmann AG Blindage pour un dispositif électrique
WO2006103193A2 (fr) * 2005-04-01 2006-10-05 Siemens Aktiengesellschaft Transformateur pourvu d'un blindage electrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11527934B2 (en) 2018-03-13 2022-12-13 Rolls-Royce Deutschland Ltd & Co Kg Electrical machine with voltage detection circuit

Also Published As

Publication number Publication date
EP2645384B1 (fr) 2018-11-14
PL2645384T3 (pl) 2019-05-31
CN104170035A (zh) 2014-11-26
EP2645384A1 (fr) 2013-10-02
CN104170035B (zh) 2016-11-02

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