EP3685413B1 - Wicklungseinheit mit am stützer ausgebildeten anzapfungen - Google Patents

Wicklungseinheit mit am stützer ausgebildeten anzapfungen Download PDF

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Publication number
EP3685413B1
EP3685413B1 EP18800503.7A EP18800503A EP3685413B1 EP 3685413 B1 EP3685413 B1 EP 3685413B1 EP 18800503 A EP18800503 A EP 18800503A EP 3685413 B1 EP3685413 B1 EP 3685413B1
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EP
European Patent Office
Prior art keywords
winding
support
winding unit
connection terminal
insulating body
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
EP18800503.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3685413A1 (de
Inventor
Richard Sille
Andre Luiz MORENO
Martin Alsina Navarro
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 EP3685413A1 publication Critical patent/EP3685413A1/de
Application granted granted Critical
Publication of EP3685413B1 publication Critical patent/EP3685413B1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating

Definitions

  • the invention relates to a winding unit for connection to a high-voltage network with a winding embedded in a solid insulating body, a first main connection terminal, which is connected to a first winding end of the winding and is arranged on a first support molded onto the insulating body, and a second main connection terminal, which is connected to a second winding end of the winding is connected, the winding having partial windings and taps, by means of which the number of turns of the partial windings connected in series can be adjusted and which are each connected via a respective exit line extending in the insulating body to a respective tap connection terminal which is accessible from the outside, wherein the tapping terminals are formed on the post, each post being rotationally symmetrical and extending in a longitudinal direction.
  • Such a winding unit is from DE 26 40 595 A1 known.
  • a winding unit is disclosed, which is embedded in a solid insulating body.
  • Two radial discharge nozzles are provided, each equipped with a main connection terminal.
  • the main connection terminals are each connected to a winding end.
  • at least two tap terminals are provided, which are arranged in one of the discharge nozzles.
  • the tap terminals are each connected to a tap on the main winding.
  • the U.S. 2014/118101 A1 describes a coil assembly embedded in a resin block.
  • the winding has taps connected to tap terminals located centrally in the resin block.
  • a winding unit is known to the person skilled in the art from practice, which figure 1 in an end view and in figure 2 is illustrated in a sectional side view.
  • the previously known winding unit 10 has an insulating body designed as a resin block 11, in which a high-voltage winding 12 is arranged.
  • the high-voltage winding 12 consists of a first 13 and a second partial winding 14, whose winding ends facing one another are connected via leads 15 and 16 extending through the resin block 11 to tap connection terminals 5 and 6, respectively, which can be contacted from the outside.
  • four further taps 17 can be seen, which are also connected to the tap connection terminals 3 and 4 as well as 7 and 8 via outgoing lines 18 .
  • the term “tap" refers to the point on the winding at which its turn makes contact with the respective output line 18 .
  • An upper main connection terminal 19 can be seen at the free end of a support 1 molded onto the resin block 11 .
  • a lower main connection terminal 20 is correspondingly formed on the free end of a support 2 which is also formed on the resin block 11 .
  • Connection of tap terminals 4 and 7 results in a series connection of an intermediate number of turns, whereas connection of tap terminals 3 and 8 results in a series connection of turns whose number is comparatively the smallest.
  • the tap connection terminals 3 and 8 are connected to one another via a connection lug 21 .
  • a connection lug 21 about -5% of the nominal voltage can be tapped at the main connection terminals 19 and 20. If you connect the tap terminals 3 and 7, the the voltage there is around -2.5%, whereas connecting the tapping terminals 4 and 6 would result in a voltage of around +2.5% that can be tapped.
  • the previously known winding unit has the disadvantage that the conductors 15, 16 and 18 running in the middle of the resin block prevent the high-voltage winding from being completely surrounded by a shielding cage.
  • the shielding cage would have to have an opening for the leads 15, 16 and 18 to pass through, which would negate the effect of the shielding.
  • the object of the invention is to provide an advantageous winding unit that makes it possible to completely encapsulate the upper voltage in the resin block by means of a shielding cage.
  • the invention solves this problem by the winding unit according to claim 1, with the characterizing part mentioned there.
  • the tapping terminals within the scope of the invention are no longer formed centrally on the insulator or, in other words, on the winding block, but together with one of the main terminals on the support. Since the support is generally arranged on the end face of the high-voltage winding arranged in the insulating body, the connecting lines of the taps can also be routed from the end face of the winding. Connecting cables that extend in the transverse direction from a tap located in the middle of the insulating body extend out of the insulator are avoided in this way.
  • the winding unit can be equipped with a shield in the insulating body, which encloses the winding completely and like a cage. In this case, the shielding is advantageously arranged in the immediate vicinity of the winding.
  • the winding is advantageously a high-voltage winding, which is therefore designed for higher voltages and lower currents.
  • the support according to the invention is rotationally symmetrical and equipped over its radial circumference with ribs extending radially to the longitudinal direction, the support extending in the longitudinal direction and the tapping terminals between two of the ribs being distributed uniformly over the circumference of the respective support.
  • ribs are provided on the support in order to increase the path for leakage currents and to suppress them as completely as possible. Leakage currents are undesirable because they can impair the dielectric strength of the insulating body.
  • the first main connection terminal is formed on the free longitudinal end of the support.
  • the first turn of the high-voltage winding is connected to the main connection terminal via a branch line that extends through the entire length of the insulator.
  • the tapping connection terminals are arranged offset toward the insulating body and are therefore at a distance from the first main connection terminal.
  • All tap terminals are arranged between two ribs at the same height and spaced from the first main terminal by at least one rib.
  • the number of turns between the first end-side turn of the winding and the taps prefferably be as small as possible. Otherwise the potential difference between the first main connection terminal and the tap terminals on the post are too large to be co-located on a post and spaced apart by only one rib.
  • the number of turns of the first partial winding, the topmost frontal turn of which is connected to the first main connection terminal and the last turn of which is connected to a tapping connection terminal on the insulator is between 1 and 20, whereas the number of turns of the second partial winding, the first frontal turn of which is connected is connected to a tap terminal and the last turn of which is connected to the second main terminal.
  • a second support is expediently provided, which extends from the winding body to its free end, with the second main connection terminal being formed at the free end of the second support.
  • two main connection terminals are provided, each of which is arranged at the free end of a support. The number of turns lying between the first and second main connection terminal and thus the voltage can be set between the connection terminals by bridging the appropriately selected tap connection terminals.
  • the second support also has ribs.
  • the ribs serve to increase the creepage distance and thus increase the dielectric strength of the winding unit.
  • the insulating body and each post are made of a cured resin.
  • Epoxy resin comes into consideration here as an expedient resin, with expedient additives being added to the resin for curing.
  • expedient resin comes into consideration here as an expedient resin, with expedient additives being added to the resin for curing.
  • insulating bodies made of resin are known to a person skilled in the art, so that detailed explanations on this can be dispensed with at this point.
  • a flexible covering cap which is held on the support and serves to protect the tap connection terminals.
  • the cap is made of a flexible elastomer, for example, and is used to keep dirt, rainwater or the like out. Because of the flexibility of the cover cap, it can be slipped over the respective ribs of the support, if necessary, over the tap connection terminals.
  • Figures 1 and 2 show a winding unit according to the prior art as already described in detail at the outset, so that a renewed representation can be omitted.
  • figure 3 shows an embodiment of the winding unit 10 according to the invention in a front view.
  • figure 4 shows the winding unit of figure 3 in a cut side view.
  • the winding unit 10 has a fixed winding body which is designed as a resin block 11 .
  • a coil 12 is embedded in the resin block 11 .
  • the uppermost winding layer of the first partial winding 13 is connected to the first main connection terminal 19 of an insulator 1 via a lead-out line 18 .
  • the first main connection terminal 19 is arranged at the free end of the support 1 which faces away from the insulating body 11 .
  • the last winding layer of the first partial winding 13 is - as in the prior art according to Figures 1 and 2 - Connected to the tap connection terminal 5 via a lead-out 15, which, however, in contrast to the in figure 1 winding unit shown is formed on the support 1.
  • the first winding layer of the second partial winding 14 is again connected via an outgoing line 16 to the tap connection terminal 6 , which is also arranged on the insulator 1 .
  • the partial windings 13, 14 differ in terms of the number of turns. While in the winding unit 11 according to figure 2 the first partial winding 13 and the second partial winding 14 are dimensioned almost identically and have approximately the same number of turns, the first partial winding 13 in the in figure 4
  • the exemplary embodiment of the invention shown has significantly smaller dimensions and is equipped with fewer turns than the second partial winding 14. This has the advantage that the leads 15, 16 and 18 do not have to be routed parallel to the winding 12 to the support 1 in the resin block 11 for an unnecessarily long time, see above that the winding unit 10 according to the invention can be designed in a simpler and more cost-effective manner.
  • the support 1 is rotationally symmetrical and forms ribs 22 in order to lengthen the leakage current path and thus increase the dielectric strength. Furthermore, it can be seen that the tapping terminals 3, 4, 5, 6, 7 and 8 are all arranged together between the first and second ribs 23 and 24 of the post 1.
  • the support 2 at the free end of which the second main connection terminal 20 is located, is also equipped with external ribs 22.
  • figure 5 shows the insulator 1 with the first main connection terminal 19 in a sectional view, in which only the tap connection terminals 7 and 5 can be seen, which are connected to the last or first turn of the first partial winding 13.
  • the tap connection terminal 7 is connected to a tap 17 of the second partial winding 14 via the outgoing line 18 .
  • FIG figure 6 shows the insulator 1 according to FIG figure 5 in a top view. All tapping terminals 3, 4, 5, 6, 7 and 8 and the central connecting line 18 for the first main terminal 19 can be seen there.
  • first rib 23 has a sub-rib 25 which has approximately the same radius as the second rib 24.
  • tap terminals located below the lower rib 25 and the second rib 24 .
  • the second connecting rib 24 is designed to be somewhat shorter radially than the remaining ribs 22 of the support 1. This makes it easier to put a flexible cover cap over the second rib 24 and the lower rib 25.
  • FIG 7 shows the winding unit 10 in a perspective view, in which it can be seen that the tapping terminals 3, 4, 5, 6, 7 and 8 are evenly distributed over the circumference of the post 1 and are therefore arranged at the same radial distance from one another.
  • the second post 2 with the second main connection terminal 20 can be seen.
  • the resin block 11 is shown, in which a high-voltage winding and two low-voltage windings are arranged.
  • the high-voltage winding is connected to the main connection terminals 19 and 20 on the input side, with the low-voltage winding being electrically connected to the low-voltage connection terminals 25 .
  • the winding body 11 is designed with a central assembly opening 26 which is provided for receiving a core limb.
  • the core limb is part of a magnetizable core unit that extends in a ring around the winding body 11 for the inductive coupling of the windings, but this is not shown in the figures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Insulating Of Coils (AREA)
EP18800503.7A 2017-11-21 2018-10-24 Wicklungseinheit mit am stützer ausgebildeten anzapfungen Active EP3685413B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017220779.5A DE102017220779A1 (de) 2017-11-21 2017-11-21 Wicklungseinheit mit am Stützer ausgebildeten Anzapfungen
PCT/EP2018/079127 WO2019101460A1 (de) 2017-11-21 2018-10-24 Wicklungseinheit mit am stützer ausgebildeten anzapfungen

Publications (2)

Publication Number Publication Date
EP3685413A1 EP3685413A1 (de) 2020-07-29
EP3685413B1 true EP3685413B1 (de) 2023-05-31

Family

ID=64270810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18800503.7A Active EP3685413B1 (de) 2017-11-21 2018-10-24 Wicklungseinheit mit am stützer ausgebildeten anzapfungen

Country Status (8)

Country Link
US (1) US11557424B2 (es)
EP (1) EP3685413B1 (es)
CN (1) CN111373497B (es)
BR (1) BR112020009328B1 (es)
CA (1) CA3083142C (es)
DE (1) DE102017220779A1 (es)
MX (1) MX2020005122A (es)
WO (1) WO2019101460A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112216493A (zh) * 2020-09-27 2021-01-12 山东电力设备有限公司 一种大电流多分接线圈的出头结构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431244A (en) * 1946-06-08 1947-11-18 Westinghouse Electric Corp High-voltage metering apparatus
DE878406C (de) * 1950-09-13 1953-06-01 Friedrich Raupach Hochspannungstrockentransformator, insbesondere zweipolig isolierter Spannungswandler
AT181318B (de) * 1952-04-24 1955-03-10 Moser Glaser & Co Ag Hochspannungs-Trockentransformator mit einem stabförmigen, magnetisierbaren Kern
DE2640595B2 (de) * 1976-09-09 1980-11-20 Transformatoren Union Ag, 7000 Stuttgart Wicklungsanordnung für einen Transformator mit in einen Kunstharzblock eingegossener Oberspannungswicklung
US4159457A (en) * 1977-10-25 1979-06-26 Burroughs Corporation Low voltage high current transformer
JP4509544B2 (ja) * 2003-01-21 2010-07-21 和夫 河野 巻線型トランス及びこの巻線型トランスを使用した電源装置
DE102006041501B4 (de) * 2006-08-31 2008-10-30 Cbp Guideway Systems Gmbh Isolator zur elektrisch isolierten Befestigung einer Stromschiene an einem Befestigungselement, insbesondere an einer Biegeweiche einer Magnetschwebebahn
CN101350247B (zh) * 2007-07-18 2010-09-08 大连北方互感器有限公司 电力机车用户外干式电压互感器
BRPI1101495B1 (pt) * 2011-04-15 2020-09-24 Siemens Aktiengesellschaft Transformador de distribuição a seco trifásico ou monofásico e método de isolação elétrica para um painel de taps de um transformador de distribuição a seco trifásico ou monofásico
CN202205531U (zh) * 2011-08-15 2012-04-25 大连北方互感器集团有限公司 单相抽头式户外放电线圈
US20130043966A1 (en) * 2011-08-15 2013-02-21 Abb Technology Ag Transformer tap projection and cover
KR101693021B1 (ko) * 2015-04-09 2017-01-05 (주)대림엠이씨 부싱단자용 절연커버

Also Published As

Publication number Publication date
EP3685413A1 (de) 2020-07-29
MX2020005122A (es) 2020-11-06
US11557424B2 (en) 2023-01-17
CN111373497B (zh) 2023-07-21
CN111373497A (zh) 2020-07-03
CA3083142C (en) 2023-03-14
BR112020009328A2 (pt) 2020-10-27
DE102017220779A1 (de) 2019-05-23
WO2019101460A1 (de) 2019-05-31
BR112020009328B1 (pt) 2024-03-12
BR112020009328A8 (pt) 2023-02-07
CA3083142A1 (en) 2019-05-31
US20200357566A1 (en) 2020-11-12

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