WO2013045228A1 - Structure de cadre de serrage pour transformateur - Google Patents

Structure de cadre de serrage pour transformateur Download PDF

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Publication number
WO2013045228A1
WO2013045228A1 PCT/EP2012/067204 EP2012067204W WO2013045228A1 WO 2013045228 A1 WO2013045228 A1 WO 2013045228A1 EP 2012067204 W EP2012067204 W EP 2012067204W WO 2013045228 A1 WO2013045228 A1 WO 2013045228A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
press frame
frame structure
zugpressplatten
structure according
Prior art date
Application number
PCT/EP2012/067204
Other languages
German (de)
English (en)
Inventor
Stephan Voss
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 KR1020147007685A priority Critical patent/KR101517741B1/ko
Priority to CN201280047299.5A priority patent/CN103827995B/zh
Priority to EP12756002.7A priority patent/EP2735005B1/fr
Publication of WO2013045228A1 publication Critical patent/WO2013045228A1/fr
Priority to HRP20160789TT priority patent/HRP20160789T1/hr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—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

Definitions

  • the invention relates to a press frame structure for a transformer
  • Transformer in particular for a power transformer.
  • press frames made of non-magnetic steel.
  • the object of the invention is to reduce the unwanted eddy currents in a transformer while at the same time providing new possibilities for constructing power transformers, in particular press frame structures for power transformers.
  • a plurality of struts at least partially obliquely formed extending transversely from a core of the transformer, with a plurality of Switzerlandpressplatten, which are arranged at or in the vicinity of the core of the transformer,
  • This press frame structure provides additional degrees of freedom in the design of the transformer and allows redistribution of forces from the edge of the core in an area outside the windings. In this way, the magnetically effective part of the required Werpressplatten at or in the vicinity of the core can be reduced, which reduces the interpreting ⁇ Lich caused by eddy currents losses and the torque to the Werpressplatten.
  • a press frame structure is proposed, e.g.
  • the press frame structure serves for the horizontal support of the transformer core, which is constructed, for example, from core sheet packages.
  • the transformer core which is constructed, for example, from core sheet packages.
  • axial winding forces between the upper and lower pressing frame can also be transmitted in spaces between windings on adjacent legs.
  • the space around the transformer can be used, for example, by means of braces to allow the cohesion required by the press frame structure.
  • the press frame structure comprises braces, so that the press frame structure (in particular the struts) magnetic field lines as low as possible cross-sectional ⁇ surfaces offers in which eddy currents could be induced ⁇ th.
  • the shape of the press frame structure can be optimized so that a Reduction of additional losses is achieved.
  • the height of the press frame structure can thus be reduced compared to the height of a known press frame, which has a favorable effect on the space required for the transformer.
  • the struts are designed obliquely so that the magnetic flux is reduced by the strut, in particular minimal.
  • the geometry of the press frame structure can be optimized based on the respective dimensions of the individual scenario so that the eddy current losses are minimized or at least significantly reduced.
  • the struts are made of sheet metal.
  • the struts can also be made of plastic or carbon. Combinations of different materials are possible.
  • the Switzerlandpress ⁇ plates connect an upper press frame of the transformer with a lower press frame of the transformer.
  • This (shortest) connection between the upper and the lower press frame also characterizes the axia ⁇ le direction described here.
  • the tension elements are partly carried out at least ⁇ from an electrically insulating material.
  • the Buchpressplatten are at least partially made of an electrically insulating material. This has the advantage that the tension elements and / or the train ⁇ press plates can be placed arbitrarily, because the magnetic flux is not significantly affected by the electrically insulating material.
  • the Buchpress ⁇ plates are at least partially incorporated in windings of the transformer.
  • the Switzerlandpressplatten are at least partially disposed in a stray channel of the transformer.
  • the train ⁇ press plates are at least partially arranged in a space between windings of adjacent legs and in an area between the legs and a boiler wall of the transformer ⁇ .
  • a next embodiment is that the Switzerlandpressplatten are at least partially disposed in the core of the transformer.
  • Fig.l schematically a core of a transformer with egg ⁇ nem upper and a lower pressing frame and a plurality of Switzerlandpressplatten connecting the upper and the lower pressing frame;
  • FIG. 2 schematically shows a view of the one transformer from above, wherein the transformer, the core, the Press frame and the Glaspressplatten according to Fig.l; one of Fig.l and Fig.2 different Pressrah ⁇ men Modell with a plurality of tension elements and struts, which are arranged outside the windings of the transformer.
  • FIG. 1 schematically shows a core 101 of a known transformer having a plurality of legs and a lower yoke in an assembled state (without the upper yoke already attached).
  • the legs are provided with a bandage, the windings are not present in this state of assembly.
  • the transformer has upper and lower pressing frames 102 and a plurality of pulling plates 103 connecting the upper and lower pressing frames 102.
  • the core 101 is preferably constructed of several layers of core sheet. By the pressing frame 102 and the Werplatten 103, a mechanical stability of the core 101 is ensured.
  • the Switzerlandpressplatten 103 with the press frame 102 ensure that the transformer is held together in the assembled state along the legs (axially).
  • FIG. 2 schematically shows a view from above of a known transformer, wherein the transformer has the core 101, the press frame 102 and the compression molding plates 103, similar to FIG. Furthermore, symbolic windings 201 of the transformer are shown in FIG.
  • the transformer shown in Figure 2 comprises in contrast to the transformer shown in Fig.l three legs and in the illustration of Figure 2 are already schematically applied windings on the legs.
  • the press frame 102 shown in FIG. 2 can be designed substantially continuously in the upper and lower regions of the transformer (see FIG. FIG. 2 here selects a symbolic sectioned illustration to illustrate that in addition to the pressing frame 102 in certain distances and in each case approximately in each middle of the winding 201, a respective tension ⁇ press plate 103 is arranged, which connects the pressing frame 102 at the upper and lower ends of the transformer.
  • the press frame 102 provides the magnetic flux with a high cross-section, resulting in high losses.
  • FIG. 3 shows a different of Fig.l and Fig.2, ⁇ OF INVENTION dung contemporary press frame structure in a plan view having a plurality of traction elements 302 and struts 301, which are disposed outside, in particular next to or laterally offset windings two hundred and first Furthermore, Figure 3 shows several Glaspressplatten 304.
  • the tension members 302 and the Werner ⁇ plates 304 are respectively fixed in the upper region of the transformer and in the lower region of the transformer, so that the core is fixed effective axially and the core sheets are interconnected ⁇ quantitative hold.
  • the traction elements 302 having the Switzerlandpressplatten 304 are at least in part ⁇ associated.
  • the press frame structure provides the magnetic flux with respect to the embodiment of Figure 2 significantly reduced cross-section, which causes a reduction in losses by eddy ⁇ currents.
  • the press frame structure allows a redistribution of the axial forces from the edge of the core in a region outside of the coils 201.
  • the traction elements 302 are vorzugswei ⁇ se with the upper and lower press frame (not shown in Figure 3) fixed.
  • the tension members 302 as well as the Wernerplatten 304 extend axially along the transformer and in particular at the top and bottom of the transformer (eg on the press frame) fixed.
  • the tension elements 302 can be suspended at the bottom and bolted to the top of the transformer.
  • the required axial force, which holds the windings 201 of the transformer together, is shown in FIG. press plates 304, the tension members 302 and the struts 301 distributed.
  • such a construction is so dimensioned that the core and the windings 201 (Minim ⁇ tens) with the same forces are held together as in a conventional press frame structure.
  • the axial force transmission between the upper and lower pressing frame (not shown in Figure 3) on the tension members 302 and / or the Werpressplatten 304 takes place, which are for example at least partially made of an electrically insulating material.
  • these Buchpressplatten 304 may have a lower mechanical strength, since they can also be used in places of the transformer, which are unfavorable for electrically conductive Wegpressplatten 304 and thus more space for Wegpressplatten 304 is available.
  • the axial forces are (pre- compression force, short circuit forces) taken by the traction elements 302 on ⁇ .
  • the tension members 302 e.g. in the form of Switzerlandpressplatten, made of electrically insulating material
  • the scatter channel has in particular the two following func ⁇ nen:
  • a power transmitted between two windings is transported in the magnetic field in the scattering channel.
  • the geometry of the leakage channel is decisive for the Kurzröim ⁇ impedance of the transformer.
  • This Kurzröimpe ⁇ impedance to limit the current in case of an error (that is, a short circuit).
  • the short-circuit impedance can be eg defined within the scope egg nes design of the transformer, eg basie ⁇ rend on a network planning.
  • the (main) leakage channel corresponds to a gap between two windings, e.g. a primary and a secondary winding or an upper and an undervoltage.
  • a transformer has more than two windings, there can be multiple stray channels.
  • modified in strips can Lagenwicklun- gene scatter channel, winding gaps to be designed as an insulating train ⁇ elements.
  • tension elements may be arranged in the core volume of the transformer core itself.
  • the upper and lower press frames can be respectively beauge ⁇ starting made conventionally.
  • the United ⁇ losses can be almost completely avoided in the press frame: Due to the favorable distribution of the axial pressure through a multiplicity number of insulating tension elements can be achieved at the same time a volume optimization of the upper and lower pressing frame.
  • the option of tension elements made of electrically insulating material thus enables a reduction of the power loss in the press frame and allows to maintain the mechanical stability of the press frame at the same time.
  • the traction elements may be almost anywhere disposed in a region 401 or incorporated of electrically isolate ⁇ the material in the example of Fig.2.
  • the use of the insulating material for the tension elements results in additional degrees of freedom in the design of the transformer;
  • the Switzerlandpressplatten 103 can be completely replaced by Switzerlandpressplatten of electrically insulating material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne une structure de cadre de serrage destinée à un transformateur, comprenant des éléments de traction (302) disposés à l'extérieur des enroulements (201) du transformateur et reliés à des plaques de serrage par traction (304) par l'intermédiaire de contrefiches (301). Les plaques de serrage (304) sont disposées sur ou au voisinage du noyau du transformateur. Les éléments de traction (302) et/ou les plaques de serrage (304) peuvent facultativement être faits d'un matériau électriquement isolant. L'avantage de cette structure est d'une part qu'elle permet de réduire les courants de Foucault et donc les pertes du transformateur en fonctionnement et d'autre part qu'elle offre des degrés de liberté supplémentaires pour la conception du transformateur. L'invention peut être appliquée par exemple à des transformateurs de forte puissance.
PCT/EP2012/067204 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur WO2013045228A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020147007685A KR101517741B1 (ko) 2011-09-27 2012-09-04 변압기용 가압 프레임 구조
CN201280047299.5A CN103827995B (zh) 2011-09-27 2012-09-04 用于变压器的压制框架结构
EP12756002.7A EP2735005B1 (fr) 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur
HRP20160789TT HRP20160789T1 (hr) 2011-09-27 2016-07-05 Tlačna okvirna konstrukcija za transformator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083521.0 2011-09-27
DE102011083521A DE102011083521A1 (de) 2011-09-27 2011-09-27 Pressrahmenstruktur für Transformator

Publications (1)

Publication Number Publication Date
WO2013045228A1 true WO2013045228A1 (fr) 2013-04-04

Family

ID=46800202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/067204 WO2013045228A1 (fr) 2011-09-27 2012-09-04 Structure de cadre de serrage pour transformateur

Country Status (7)

Country Link
EP (1) EP2735005B1 (fr)
KR (1) KR101517741B1 (fr)
CN (1) CN103827995B (fr)
DE (1) DE102011083521A1 (fr)
HR (1) HRP20160789T1 (fr)
PL (1) PL2735005T3 (fr)
WO (1) WO2013045228A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104465068A (zh) * 2014-12-09 2015-03-25 吴江变压器有限公司 一种变压器线圈防反弹压紧工装
PL3503134T3 (pl) 2017-12-20 2020-09-21 Bertram Ehmann Urządzenia mocujące do przytrzymywania magnetycznie miękkiego rdzenia warstwowego transformatora oraz transformator
BR112023005418A2 (pt) * 2020-10-26 2023-05-09 Siemens Energy Global Gmbh & Co Kg Estrutura de compensação para reduzir corrente circulante em janela de transformador e transformador que compreende estrutura de compensação

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339972A1 (de) * 1973-06-25 1975-01-16 Bbc Brown Boveri & Cie Abstuetz- bzw. pressvorrichtung fuer magnetkerne und wicklungen von transformatoren oder drosselspulen
JPS6199314A (ja) * 1984-10-22 1986-05-17 Toshiba Corp 静止誘導電器

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US2431950A (en) * 1944-01-26 1947-12-02 Jefferson Electric Co Core construction for electromagnetic apparatus
DE1233484B (de) * 1960-04-22 1967-02-02 Elin Union Ag Vorrichtung zur Jochpressung fuer Transformatoren mit geschichtetem Eisenkern
DE1162946B (de) * 1960-11-29 1964-02-13 Licentia Gmbh Haltevorrichtung fuer geblechte Kerne von Grosstransformatoren od. dgl.
DE1218606B (de) * 1961-08-25 1966-06-08 Cie Generale D Electricite Soc Transformator oder Drosselspule grosser Leistung
CH417760A (de) * 1964-12-10 1966-07-31 Oerlikon Maschf Wicklung, insbesondere für Grosstransformatoren
DD257896A1 (de) * 1987-02-25 1988-06-29 Transform Roentgen Matern Veb Vorrichtung zum axialen verspannen von spulenbloecken
DE8810040U1 (de) * 1987-09-15 1989-01-12 Siemens AG, 1000 Berlin und 8000 München Transformator bzw. Drossel mit jochpaketseitigen, durch Zugstangen gegeneinander verspannbaren Spannauflagen
WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau
KR200352342Y1 (ko) 2004-03-16 2004-06-04 박동석 변압기용 코일 프레임
CN201289779Y (zh) * 2008-08-27 2009-08-12 保定天威集团有限公司 一种大型电力变压器铁芯拉板
CN201397727Y (zh) * 2009-05-21 2010-02-03 张鑫 变压器铁芯的夹紧结构
KR200451057Y1 (ko) 2010-06-14 2010-11-22 주식회사 케이피 일렉트릭 변압기용 코어 고정장치

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339972A1 (de) * 1973-06-25 1975-01-16 Bbc Brown Boveri & Cie Abstuetz- bzw. pressvorrichtung fuer magnetkerne und wicklungen von transformatoren oder drosselspulen
JPS6199314A (ja) * 1984-10-22 1986-05-17 Toshiba Corp 静止誘導電器

Also Published As

Publication number Publication date
CN103827995A (zh) 2014-05-28
HRP20160789T1 (hr) 2016-08-12
KR101517741B1 (ko) 2015-05-04
PL2735005T3 (pl) 2016-10-31
DE102011083521A1 (de) 2013-03-28
CN103827995B (zh) 2016-08-24
EP2735005A1 (fr) 2014-05-28
KR20140050746A (ko) 2014-04-29
EP2735005B1 (fr) 2016-04-06

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