DE2728905A1 - Transformer with large stray channel and large stray flux - has laminated stray yokes covering winding ends and placed in recesses of main yokes - Google Patents

Transformer with large stray channel and large stray flux - has laminated stray yokes covering winding ends and placed in recesses of main yokes

Info

Publication number
DE2728905A1
DE2728905A1 DE19772728905 DE2728905A DE2728905A1 DE 2728905 A1 DE2728905 A1 DE 2728905A1 DE 19772728905 DE19772728905 DE 19772728905 DE 2728905 A DE2728905 A DE 2728905A DE 2728905 A1 DE2728905 A1 DE 2728905A1
Authority
DE
Germany
Prior art keywords
yokes
main
stray
transformer
recesses
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.)
Granted
Application number
DE19772728905
Other languages
German (de)
Other versions
DE2728905C2 (en
Inventor
Mohammed Ali Dr El-Mahgary
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union 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 Transformatoren Union AG filed Critical Transformatoren Union AG
Priority to DE2728905A priority Critical patent/DE2728905C2/en
Priority to JP7594778A priority patent/JPS5411417A/en
Publication of DE2728905A1 publication Critical patent/DE2728905A1/en
Application granted granted Critical
Publication of DE2728905C2 publication Critical patent/DE2728905C2/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36Electric or magnetic shields or screens
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36Electric or magnetic shields or screens
    • H01F27/366Electric or magnetic shields or screens made of ferromagnetic material

Abstract

The transformer short-circuit voltage is about equal to the nominal voltage. In order to increase the Rogowski factor laminated stray yokes are provided directly in fron of winding ends in addition the normal main yokes. They cover the winding ends including the stray channels, attract the stray flux, and are close to the main yokes. Induction in the stray yokes is at a nominal voltage below saturation value, as in 2728904. Strip wound cores with a radial slot filled with an insulating material serve as the stray yokes (5). They are placed between non-magnetic pressure rings (3) and the main yokes (4), and are fitted in recesses (12) in the main yokes.

Description

Transformator mit großem Streukanal und großem StreuflußanteilTransformer with a large leakage channel and a large proportion of leakage flux

Zusatz zu Patentanmeldung P .......... ( VPA 77 P 9104 BRD) Die Erfindung betrifft einen Transformator mit großem Streukanal und großem Streuflußanteil, bei dem die Kurzschlußspannung etwa gleich der Nennspannung ist. Gemäß dem Hauptpatent ist vorgesehen, daß zur Erhöhung des Rogowskifaktors unmittelbar vor den Stirnseiten der Wicklung zusätzlich zu den betriebsmäßig erforderlichen Haupt Jochen ebenfalls aus lamellierten Blechen geschichtete StreuJoche angeordnet sind, die die Stirnseiten der Wicklungen einschließlich des Streukanals abdecken, wobei die StreuJoche einerseits ueber die Stirnseiten der Wicklungen den Streufluß auf sich ziehen und andererseits mit den HauptJochen in enger räumlicher Verbindung stehen, und daß die Induktion in den StreuJochen bei Nennspannung unterhalb der Sättigungsinduktion liegt.Addition to patent application P .......... (VPA 77 P 9104 BRD) The invention relates to a transformer with a large leakage channel and a large amount of leakage flux which the short-circuit voltage is approximately equal to the nominal voltage. According to the main patent it is provided that to increase the Rogowski factor directly in front of the end faces the winding in addition to the main yokes required for operation Yokes are arranged from laminated metal sheets, which form the end faces of the windings including the scattering channel, with the scattering yokes on the one hand draw the leakage flux over the end faces of the windings and on the other hand are in close spatial connection with the main yokes, and that induction in the StreuJochen is below the saturation induction at nominal voltage.

Derartig aufgebaute StreufeldtransCormatoren erfüllen zwar die ihnen zugeordnete Funktion zur Vfo en Zufriedenheit, erfordern Jedoch insbesondere bei axial übereinander angeordneten Druckringen und StreuJochen eine verhältnismäßig große Kernfensterhöhe, so daß sie hinsichtlich der Werkstoffausnutzung sowie des beanspruchten Volumens noch nicht soll befriedigend sind.Stray field transformers constructed in this way meet them assigned function for Vfo en satisfaction, however in particular require axially superimposed pressure rings and StreuJochen a relatively large core window height, so that they are in terms of material utilization and the claimed volume is not yet supposed to be satisfactory.

Der Erfindung liegt daher die Aufgabe zugrunde, Streuteldtr-nsformatoren der eingangs geschilderten Art so zu verbessern, daß ohne Beeinträchtigung der Funktionsfähigkeit bei gleicher Leistung die Höhe des Kernfensters verringert werden kann.The invention is therefore based on the object of providing scatter transformers to improve the type described above so that without impairment the functionality with the same performance, the height of the core window is reduced can be.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß als Streu-Joche dienende, mit einem radialen isoliermittelgefullten Schlitz versehene Bandwickelkerne zwischen unmagnetischen Druckringen und den HauptJochen angeordnet und in Aussparungen der Haupt-Joche eingepaßt sind.According to the invention, this object is achieved in that the scattering yokes serving, with a radial insulating-filled slot provided tape winding cores arranged between non-magnetic pressure rings and the main yokes and in recesses the main yokes are fitted.

Nach vorteilhaften Ausgestaltungen der Erfindung ist vorgesehen, daß zur Einstellung der Kurzschlußreaktanz der Abstand zwischen StreuJoch und HauptJoch verstellbar ist und daß der HauptJochquerschnitt größer ist als der Jochquerschnitt in streuJochlosen vergleichbaren Eisenkernen.According to advantageous embodiments of the invention it is provided that To set the short-circuit reactance, the distance between the scattering yoke and the main yoke is adjustable and that the main yoke cross-section is larger than the yoke cross-section in comparable iron cores without litter yokes.

Das Vorteilhafte der Erfindung, insbesondere auch gegenüber dem Hauptpatent, ist die mögliche Verkleinerung des Abstandes zwischen Wicklung und Joch, wobei außerdem die magnetischen Bandwickelkerne nicht in die Wicklungseinspanneinrichtung einbezogen werden müssen, so daß letztere nur noch zur Beherrschung der Wicklungskurzschlußkräfte ausgelegt sein müssen. Außerdem ist durch die durch die erfindungsgemäße Anordnung erreichte sehr enge räumliche Verbindung der StreuJoche mit den HauptJochen eine sehr einfache Einstelleinrichtung zur Veränderung der Kurzschlußreaktanz möglich.The advantages of the invention, especially compared to the main patent, is the possible reduction in the distance between the winding and the yoke, and also the magnetic tape hubs not included in the winding chuck must be so that the latter only to control the winding short-circuit forces must be designed. In addition, by the arrangement according to the invention achieved a very close spatial connection between the StreuJoche and the mainJochen very simple setting device for changing the short-circuit reactance possible.

Anhand einer Zeichnung wird ein Ausführungsbeispiel der Erfindung näher erläutert.An exemplary embodiment of the invention is illustrated using a drawing explained in more detail.

Figur 1 zeigt den oberen Teil eines einphasigen Streutranstormators im Schnitt und Figur 2 denselben Transformator in einer Draufsicht.Figure 1 shows the upper part of a single-phase leakage transformer in section and FIG. 2 the same transformer in a plan view.

Um einen Eisenkern 10 sind W klungen 1 angeordnet, die einen Streukanal 2 umschließen. Die Enden des Eisenkernes 10 sind in nicht näher dargestellter Weise Uber HauptJoche 4 und RückschluB- schenkel 7 zu einem geschlossenen Eisenkreis miteinander verbunden. Die Wicklungen 1 sind zwischen Druckringen 3 aus Holz oder einem anderen Isolierwerkstoff eingespannt.Around an iron core 10 W blades 1 are arranged, which have a scattering channel 2 enclose. The ends of the iron core 10 are in a manner not shown About main yokes 4 and inference leg 7 to a closed one Iron circle connected to each other. The windings 1 are made between pressure rings 3 Wood or another insulating material clamped.

Im oberen Teil des Streutransformators sind oberhalb des Druckringes 3 und entsprechend in nicht dargestellter Weise im unteren Teil des Transformators unterhalb des unteren Druckringes 3 Je ein StreuJoch 5 angeordnet, deren Jedes als Bandwickelkern ausgeführt und zur Vermeidung von Kurzschlußwindungen mit einem isoliermittelgefüllten radialen Luftspalt 6 versehen ist. In den HauptJochen 4 sind zur Aufnahme der die StreuJoche 5 darstellenden Bandwickelkerne Aussparungen 12 vorgesehen, die in ihren Abmessungen etwas größer sind als der Querschnitt der Bandwickelkerne, so daß diese wicklungsseitig annähernd bündig mit den HauptJochen 4 abschließen. Zur Vermeidung unzulässig hoher Induktionen in den HauptJochen 4 im Bereich der Aussparungen 12 sind die Querschnitte der Hauptjoche 4 gegenüber denen in streu-Jochlosen Transformatoren gleicher Leistung verstärkt ausgefuhrt.In the upper part of the distribution transformer are above the pressure ring 3 and accordingly in a manner not shown in the lower part of the transformer below the lower pressure ring 3 each a scatter yoke 5 arranged, each of which as Tape winding core executed and to avoid short-circuit turns with an insulating material radial air gap 6 is provided. In the main yokes 4 are to accommodate the StreuJoche 5 representing tape hubs are provided in their recesses Dimensions are slightly larger than the cross-section of the tape winding cores, so that these End almost flush with the main yokes 4 on the winding side. To avoid Inadmissibly high inductions in the main yokes 4 in the area of the recesses 12 are the cross-sections of the main yokes 4 compared to those in non-stray transformers reinforced with the same performance.

Die die StreuJoche 5 darstellenden Bandwickelkerne können innerhalb der Aussparungen in den HauptJochen 4 in axialer Richtung in nicht näher dargestellter Art und Weise bewegt werden, so daß durch Verändern der relativen Lage der Streu- und HauptJoche zueinander die Kurzschlußreaktanz der Anlage einstellbar ist.The tape winding cores representing the scattering yokes 5 can within the recesses in the main yokes 4 in the axial direction not shown in detail Be moved in such a way that by changing the relative position of the scattering and main yokes to each other, the short-circuit reactance of the system can be adjusted.

Um den radial aus den Wicklungsenden austretenden Streuflußanteil 80 klein wie möglich zu halten, ist zweckmäßigerweise der Abstand zwischen den Rückschlußschenkeln 7 und der äußeren Wicklung 1 größer als der Abstand zwischen den Wicklungsstirnseiten und den StreuJochen 5. Zur UnterstUtzteng dieser Maßnahme sind die Rückschlußschenkel 7 auf ihrer den Wicklungen 1 zugekehrten Seite abgestuft, dagegen sind die Hauptsache 4 auf der den Wicklungen 1 entgegengesetzten Seite abgeo att.About the leakage flux component exiting radially from the winding ends To keep 80 as small as possible is expediently the distance between the yoke legs 7 and the outer winding 1 is greater than the distance between the winding end faces and the StreuJochen 5. To support this measure are the return legs 7 graded on their side facing the windings 1, however, are the main thing 4 on the side opposite the windings 1 abo att.

Die erfindungagemäße Anordnung der StreuJoche 5 in Aussparungen 12 der HauptJoche 4 ist auch bei Mehrschenkeltransformatoren sinnvoll. Dabei enden zweckmäßigerweise bei Streutransformatoren ohne Rückschlußschenkel 7 die HauptJoche 4 etwa Uber dem AuBendurchmesser der die StreuJoche 5 darstellenden Bandwickelkerne.The arrangement according to the invention of the scattering yokes 5 in recesses 12 the main yoke 4 is also in multi-leg transformers sensible. In the case of scatter transformers, this expediently ends without a return leg 7 the main yokes 4 about the outer diameter of the scattering yokes 5 Tape winding cores.

3 Patentansprüche 2 Figuren Leerseite3 claims 2 figures Blank page

Claims (3)

PatentansPrUche: 1. Transformator mit großem Streukanal und großem Streuflußanteil bei dem die Kurzschlußspannung etwa gleich der Nennspannung ist, wobei zur Erhöhung des Rogowskifaktors unmittelbar vor den Stirnseiten der Wicklung zusätzlich zu den betriebsmäßig erforderlichen Haupt Jochen ebenfalls aus lamellierten Blechen geschichtet. Streujoche angeordnet sind, die die Stirnseiten der Wicklungen einschließlich des Streukanals abdecken, wobei die StreuJoche einerseits über die Stirnseiten der Wicklungen den Streufluß auf sich ziehen und andererseits mit den Hauptjochen in enger räumlicher Verbindung stehen, und daß die Induktion in den StreuJochen bei Nennspannung unterhalb der Sättigungsinduktion liegt, nach Patent ........... ( Patentanmeldung P .............), d a d u r c h g e k e n n z e i c h n e t , daß als Streujoche (5 dienende, mit einem radialen isoliermittelgefüllten Schlitz versehene Bandwickelkerne zwischen unmagnetischen Druckringen (3) und den Hauptjochen (4) angeordnet und in Aussparungen (12) der HauptJoche (4) eingepaßt sind. Claims: 1. Transformer with a large scattering channel and a large Stray flux component in which the short-circuit voltage is approximately equal to the nominal voltage, whereby to increase the Rogowski factor directly in front of the end faces of the winding in addition to the main yokes required for operation, also made of laminated Laminated sheets. Streujoche are arranged covering the end faces of the windings including the litter channel, the litter yokes on the one hand over the Front sides of the windings draw the leakage flux on itself and on the other hand with the Main yokes are in close spatial connection, and that induction in the StreuJochen is below the saturation induction at nominal voltage, according to patent ........... (patent application P .............), d a d u r c h g e k e n n z e i c h n e t that as Streujoche (5 serving, filled with a radial insulating agent Slotted tape winding cores between non-magnetic pressure rings (3) and the Main yokes (4) arranged and fitted into recesses (12) of the main yokes (4) are. 2. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß zur Einstellung der Kurzschlußreaktanz der Abstand zwischen Streu-Joch (5) und Hauptjoch (4) verstellbar ist. 2. Transformer according to claim 1, characterized in that for Setting of the short-circuit reactance of the distance between the scattering yoke (5) and the main yoke (4) is adjustable. 3. Transformator nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der HauptJochquerschnitt größer ist als der Jochquerschnitt in streuJochlosen vergleichbaren Eisenkernen. 3. Transformer according to claim 1 and 2, characterized in that the main yoke cross-section is larger than the yoke cross-section in comparable scattered yokes Iron cores.
DE2728905A 1977-06-27 1977-06-27 Transformer with a large leakage channel and a large proportion of leakage flux Expired DE2728905C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2728905A DE2728905C2 (en) 1977-06-27 1977-06-27 Transformer with a large leakage channel and a large proportion of leakage flux
JP7594778A JPS5411417A (en) 1977-06-27 1978-06-22 Transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2728905A DE2728905C2 (en) 1977-06-27 1977-06-27 Transformer with a large leakage channel and a large proportion of leakage flux

Publications (2)

Publication Number Publication Date
DE2728905A1 true DE2728905A1 (en) 1979-01-18
DE2728905C2 DE2728905C2 (en) 1983-02-03

Family

ID=6012453

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2728905A Expired DE2728905C2 (en) 1977-06-27 1977-06-27 Transformer with a large leakage channel and a large proportion of leakage flux

Country Status (2)

Country Link
JP (1) JPS5411417A (en)
DE (1) DE2728905C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257025A (en) * 1978-06-12 1981-03-17 Asea Aktiebolag Laminated metallic plates for supporting core leg in inductive electrical devices to determine magnetic circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246543A1 (en) * 2002-09-30 2003-06-18 Siemens Ag Winding arrangement e.g. for transformers, includes leakage flux guide yoke designed as leakage flux guide disc
RU2742080C1 (en) * 2020-03-26 2021-02-02 Николай Петрович Суханов Transformer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1124165A (en) * 1965-10-22 1968-08-21 Westinghouse Electric Corp Core-form transformer
US3750070A (en) * 1971-11-30 1973-07-31 Westinghouse Electric Corp Pressure ring for transformer windings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1124165A (en) * 1965-10-22 1968-08-21 Westinghouse Electric Corp Core-form transformer
US3750070A (en) * 1971-11-30 1973-07-31 Westinghouse Electric Corp Pressure ring for transformer windings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257025A (en) * 1978-06-12 1981-03-17 Asea Aktiebolag Laminated metallic plates for supporting core leg in inductive electrical devices to determine magnetic circuit

Also Published As

Publication number Publication date
DE2728905C2 (en) 1983-02-03
JPS5411417A (en) 1979-01-27

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Legal Events

Date Code Title Description
OI Miscellaneous see part 1
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee