EP0012739A1 - Choke - Google Patents

Choke Download PDF

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Publication number
EP0012739A1
EP0012739A1 EP79890057A EP79890057A EP0012739A1 EP 0012739 A1 EP0012739 A1 EP 0012739A1 EP 79890057 A EP79890057 A EP 79890057A EP 79890057 A EP79890057 A EP 79890057A EP 0012739 A1 EP0012739 A1 EP 0012739A1
Authority
EP
European Patent Office
Prior art keywords
yokes
core columns
intermediate layers
recesses
magnetic
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
EP79890057A
Other languages
German (de)
French (fr)
Other versions
EP0012739B1 (en
Inventor
Gustav Dr. Preininger
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.)
Andritz Hydro GmbH Austria
Original Assignee
Andritz Hydro GmbH Austria
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 Andritz Hydro GmbH Austria filed Critical Andritz Hydro GmbH Austria
Publication of EP0012739A1 publication Critical patent/EP0012739A1/en
Application granted granted Critical
Publication of EP0012739B1 publication Critical patent/EP0012739B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • 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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Definitions

  • the invention relates to a choke coil, the core columns of which consist of individual, radially laminated packages separated from one another by non-magnetic intermediate layers and which are connected with a rectangular or step-shaped cross section, the core columns and the yokes having cylindrical, aligned recesses for receiving central tension bolts.
  • the core columns consist of individual radially laminated packages and non-magnetic spacings in between.
  • three core columns usually lying in one plane, are closed off by a lower and an upper yoke, which in the simplest case has a rectangular cross section.
  • Both the core columns and the yokes have cylindrical recesses that serve to receive central tension bolts, with the help of which the entire structure is pressed and held. These recesses create a zone in the yoke in which the magnetic paths are interrupted by the recesses for the tension bolts.
  • the magnetic flux e.g.
  • a known remedy is e.g. the installation of transverse yokes, through which the river is led from the median strip into the peripheral zones.
  • the object of the invention is therefore to provide a choke coil in which the above disadvantages are avoided and which is still simple and economical in construction and in manufacture.
  • the choke coil according to the invention is characterized in that the packets of the core columns adjacent to the yokes in In the direction of the yokes, the cross sections widen in a wedge shape and the yokes have rectangular non-magnetic intermediate layers, and that these intermediate layers are arranged in the central region interrupted by the recesses.
  • the invention makes it possible for the first time to produce a choke coil of the type mentioned in the introduction, in which the guidance of the magnetic flux is optimal. There are therefore no eddy current losses and no heating in the edge areas of the recesses. The guidance of the magnetic flux is also flawless in the transition area between the core columns and the yoke.
  • cooling channels are arranged in the non-magnetic intermediate layers.
  • FIG. 1 shows the basic structure of a choke coil
  • FIG. 2 shows a side elevation of FIG. 1
  • FIG. 3 shows a top view of the choke coil according to FIG. 1
  • the three-phase choke coil consists of three core columns 1, which are constructed from individual radially laminated packages 2. Non-magnetic spacings 3 are arranged between the individual packages 2.
  • the three core columns 1 arranged in one plane are connected to one another by an upper and a lower yoke 4 (not shown).
  • the core columns 1 and the yokes 4 have cylindrical recesses 5. The core columns 1 with the yokes 4 are pressed together and held together with the central tension bolts arranged in these recesses 5.
  • the packets 2 of the core columns 1 adjacent to the yokes have non-magnetic intermediate layers 7 which widen in a wedge-shaped cross section. Through these wedge-shaped intermediate layers 7, the magnetic flux is continuously conducted into the uninterrupted zone of the yokes. This does not result in eddy current losses, nor does it result in inadmissible heating in the peripheral zones. The arrangement of auxiliary yokes is no longer necessary.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • General Induction Heating (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Eine Drosselspule besteht meist aus Kernsäulen, die durch Joche (4) miteinander verbunden sind, wobei die Kernsäulen aus einzelnen, durch unmagnetische Zwischenlagen (3) voneinander getrennten, radialgeblechten Paketen (2) bestehen. Sowohl die Kernsäulen als auch die Joche (4) besitzen zylindrische Ausnehmungen, die zur Aufnahme von zentralen Zugbolzen dienen, mit deren Hilfe die gesamte Konstruktion gepreßt und gehalten wird. Der Magnetfluß wird durch diese Ausnehmungen gezwungen, quer zu den Blechen in die Randzonen auszuweichen, wodurch es an den Ausnehmungsrändern zu erhöhten Wirbelstromverlusten und zu gefährlichen Erwärmungen kommt. Um derartige Nachteile zu vermeiden, weisen die den Jochen (4) anliegenden Pakete (2) der Kernsäulen in Richtung der Joche (4) sich im Querschnitt keilförmig erweiternde (7) und die Joche (4) im Querschnitt rechteckige (6) unmagnetische Zwischenlagen auf. Diese Zwischenlagen (6, 7) sind in dem durch die Ausnehmungen unterbrochenen Mittelbereich angeordnet.A choke coil usually consists of core columns which are connected to each other by yokes (4), the core columns consisting of individual, radially laminated packages (2) separated from one another by non-magnetic intermediate layers (3). Both the core columns and the yokes (4) have cylindrical recesses which serve to receive central tension bolts, with the help of which the entire structure is pressed and held. The magnetic flux is forced through these recesses to move transversely to the metal sheets in the edge zones, which leads to increased eddy current losses and dangerous heating at the recess edges. In order to avoid such disadvantages, the packets (2) of the core columns adjacent to the yokes (4) have wedge-shaped cross-sections (7) in the direction of the yokes (4) and the yokes (4) have rectangular (6) non-magnetic intermediate layers . These intermediate layers (6, 7) are arranged in the central area interrupted by the recesses.

Description

Die Erfindung betrifft eine Drosselspule, deren Kernsäulen aus einzelnen, durch unmagnetische Zwischenlagen voneinander getrennten, radialgeblechten Paketen besteht und die mit einem rechteckigen oder stufenförmigen Querschnitt aufweisenden Jochen verbunden sind, wobei die Kernsäulen und die Joche zylindrische, fluchtende Ausnehmungen zur Aufnahme von zentralen Zugbolzen aufweisen.The invention relates to a choke coil, the core columns of which consist of individual, radially laminated packages separated from one another by non-magnetic intermediate layers and which are connected with a rectangular or step-shaped cross section, the core columns and the yokes having cylindrical, aligned recesses for receiving central tension bolts.

Bei Drosselspulen, insbesondere bei Kompensationsdrosselspulen wird eine Konstruktion angewandt, bei der die Kernsäulen aus einzelnen radialgeblechten Paketen und dazwischenliegenden unmagnetischen Distanzierungen bestehen. Bei Drehstrom-Drosselspulen werden drei, meist in einer Ebene liegende Kernsäulen durch ein unteres und ein oberes Joch, das im einfachsten Fall einen rechteckigen Querschnitt besitzt, abgeschlossen. Sowohl die Kernsäulen als auch die Joche besitzen zylindrische Ausnehmungen, die zur Aufnahme von zentralen Zugbolzen dienen, mit deren Hilfe die gesamte Konstruktion gepreßt und gehalten wird. Durch diese Ausnehmungen entsteht im Joch eine Zone, in der die magnetischen Wege durch die Ausnehmungen für die Zugbolzen unterbrochen sind. Der Magnetfluß, der z.B. von einem Außenschenkel zum anderen geführt werden muß, wird gezwungen, quer zu den Blechen in die Randzonen auszuweichen, wodurch es insbesondere an den Ausnehmungsrändern zu erhöhten Wirbelstromverlusten und zu gefährlichen Erwärmungen kommen kann. Eine bekannte Abhilfemaßnahme ist z.B. die Anbringung von Querjochen, über die der Fluß aus dem Mittelstreifen in die Randzonen gefübrt wird.In the case of choke coils, in particular in the case of compensation choke coils, a construction is used in which the core columns consist of individual radially laminated packages and non-magnetic spacings in between. In the case of three-phase choke coils, three core columns, usually lying in one plane, are closed off by a lower and an upper yoke, which in the simplest case has a rectangular cross section. Both the core columns and the yokes have cylindrical recesses that serve to receive central tension bolts, with the help of which the entire structure is pressed and held. These recesses create a zone in the yoke in which the magnetic paths are interrupted by the recesses for the tension bolts. The magnetic flux, e.g. must be led from one outer leg to the other, is forced to move transversely to the sheets in the edge zones, which can lead to increased eddy current losses and dangerous heating, especially at the recess edges. A known remedy is e.g. the installation of transverse yokes, through which the river is led from the median strip into the peripheral zones.

Aufgabe der Erfindung ist es daher, eine Drosselspule zu schaffen, bei der die obigen Nachteile vermieden werden und die im Aufbau sowie in der Herstellung trotzdem einfach und wirtschaftlich ist.The object of the invention is therefore to provide a choke coil in which the above disadvantages are avoided and which is still simple and economical in construction and in manufacture.

Die erfindungsgemäße Drosselspule ist dadurch gekennzeichnet, daß die den Jochen anliegenden Pakete der Kernsäulen in Richtung der Joche sich im Querschnitt keilförmig erweiternde und die Joche im Querschnitt rechteckige unmagnetische Zwischenlagen aufweisen und daß diese Zwischenlagen in dem durch die Ausnehmungen unterbrochenen Mittelbereich angeordnet sind. Durch die Erfindung ist es erstmals möglich, eine Drosselspule der eingangs genannten Art herzustellen, bei der die Führung des Magnetflusses optimal ist. Es entstehen somit in den Randbereichen der Ausnehmungen keine Wirbelstromverluste und auch keine Erwärmungen. Auch im Übergangsbereich von Kernsäulen und Joch ist die Führung des Magnetflusses einwandfrei.The choke coil according to the invention is characterized in that the packets of the core columns adjacent to the yokes in In the direction of the yokes, the cross sections widen in a wedge shape and the yokes have rectangular non-magnetic intermediate layers, and that these intermediate layers are arranged in the central region interrupted by the recesses. The invention makes it possible for the first time to produce a choke coil of the type mentioned in the introduction, in which the guidance of the magnetic flux is optimal. There are therefore no eddy current losses and no heating in the edge areas of the recesses. The guidance of the magnetic flux is also flawless in the transition area between the core columns and the yoke.

Gemäß einer besonderen Ausgestaltung der Erfindung sind in den unmagnetischen Zwischenlagen Kühlkanäle angeordnet. Durch diese Weiterbildung der Erfindung. ist es möglich, mit einfachen Arbeitsgängen die Kühlkanäle für den Durchfluß des Öles zu schaffen.According to a special embodiment of the invention, cooling channels are arranged in the non-magnetic intermediate layers. Through this development of the invention. it is possible to create the cooling channels for the flow of the oil with simple operations.

Die Erfindung wird an Hand des in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Fig. 1 zeigt den prinzipiellen Aufbau einer Drosselspule, Fig.2 einen Seitenriß der Fig. 1 und die Fig. 3 eine Draufsicht auf die Drosselspule gemäß Fig. 1The invention is explained in more detail with reference to the embodiment shown in the drawing. 1 shows the basic structure of a choke coil, FIG. 2 shows a side elevation of FIG. 1 and FIG. 3 shows a top view of the choke coil according to FIG. 1

Gemäß Fig. 1 besteht die Drehstromdrosselspule aus drei Kernsäulen 1, die aus einzelnen radialgeblechten Paketen 2 aufgebaut sind. Zwischen den einzelnen Paketen 2 sind unmagnetische Distanzierungen 3 angeordnet. Die drei in einer Ebene angeordneten Kernsäulen 1 sind durch ein oberes und ein - nicht dargestelltes - unteres Joch 4 miteinander verbunden. Die Kernsäulen 1, sowie die Joche 4 besitzen zylindrische Ausnehmungen 5. Mit den in diesen Ausnehmungen 5 angeordneten zentralen Zugbolzen werden die Kernsäulen 1 mit den Jochen 4 zusammengepreßt und zusammengehalten.1, the three-phase choke coil consists of three core columns 1, which are constructed from individual radially laminated packages 2. Non-magnetic spacings 3 are arranged between the individual packages 2. The three core columns 1 arranged in one plane are connected to one another by an upper and a lower yoke 4 (not shown). The core columns 1 and the yokes 4 have cylindrical recesses 5. The core columns 1 with the yokes 4 are pressed together and held together with the central tension bolts arranged in these recesses 5.

Um nun den von den Ausnehmungen 5 unterbrochenen Mittelbereich in den Jochen vom Magnetfluß freizuhalten, wird dieser Bereich 6 durch ein unmagnetisches Material ersetzt (Fig. 3.)In order to keep the central area interrupted by the recesses 5 in the yokes from the magnetic flux, the this area 6 replaced by a non-magnetic material (Fig. 3.)

Da beim Übergang des Magnetflusses von den Kernsäulen 1 in die Joche 4 ebenfalls Wirbelstromverluste bzw. unzulässige Erwärmungen auftreten könnten, weisen die den Jochen anliegenden Pakete 2 der Kernsäulen 1, sich im Querschnitt keilförmig erweiternde, unmagnetische Zwischenlagen 7 auf. Durch diese keilförmigen Zwischenlagen 7 wird der Magnetfluß kontinuierlich in die nicht unterbrochene Zone der Joche geleitet. Dadurch entstehen weder Wirbelstromverluste, noch kommt es in den Randzonen zu unzulässigen Erwärmungen. Die Anordnung von Hilfsjochen ist nicht mehr erforderlich.Since eddy current losses or impermissible heating could also occur during the transition of the magnetic flux from the core columns 1 to the yokes 4, the packets 2 of the core columns 1 adjacent to the yokes have non-magnetic intermediate layers 7 which widen in a wedge-shaped cross section. Through these wedge-shaped intermediate layers 7, the magnetic flux is continuously conducted into the uninterrupted zone of the yokes. This does not result in eddy current losses, nor does it result in inadmissible heating in the peripheral zones. The arrangement of auxiliary yokes is no longer necessary.

Claims (2)

1.Drosselspule, deren Kernsäulen aus einzelnen, durch unmagnetische Zwischenlagen voneinander getrennten, radialgeblechten Paketen besteht und die mit einem rechteckigen oder stufenförmigen Querschnitt aufweisenden Jochen verbunden sind, wobei die Kernsäulen und die Joche zylindrische, fluchtende Ausnehmungen zur Aufnahme von zentralen Zugbolzen aufweisen, dadurch gekennzeichnet, daß die den Jochen (4) anliegenden Pakete (2) der Kernsäulen (1) in Richtung der Joche (4) sich im Querschnitt keilförmig erweiternde (7) und die Joche (4) im Querschnitt rechteckige (6) unmagnetische Zwischenlagen aufweisen und daß diese Zwischenlagen (6,7) in dem durch die Ausnehmungen (5) unterbrochenen Mittelbereich angeordnet sind.1. Choke coil, the core columns of which are composed of individual, radially laminated packages separated from one another by non-magnetic intermediate layers and which are connected with a rectangular or step-shaped cross section, the core columns and the yokes having cylindrical, aligned recesses for receiving central tension bolts, characterized in that that the packets (2) of the core columns (1) adjacent to the yokes (4) widen in cross-section wedge-shaped (7) in the direction of the yokes (4) and the yokes (4) have rectangular (6) non-magnetic intermediate layers and that these intermediate layers (6, 7) are arranged in the central region interrupted by the recesses (5). 2.Drosselspule, nach Anspruch 1, dadurch gekennzeichnet, daß in den unmagnetischen Zwischenlagen (6,7) Kühlkanäle angeordnet sind.2. inductor, according to claim 1, characterized in that cooling channels are arranged in the non-magnetic intermediate layers (6,7).
EP79890057A 1978-12-12 1979-12-11 Choke Expired EP0012739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT882778A AT357236B (en) 1978-12-12 1978-12-12 THROTTLE COIL
AT8827/78 1978-12-12

Publications (2)

Publication Number Publication Date
EP0012739A1 true EP0012739A1 (en) 1980-06-25
EP0012739B1 EP0012739B1 (en) 1981-10-14

Family

ID=3608902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79890057A Expired EP0012739B1 (en) 1978-12-12 1979-12-11 Choke

Country Status (5)

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US (1) US4301437A (en)
EP (1) EP0012739B1 (en)
JP (1) JPS6030088B2 (en)
AT (1) AT357236B (en)
DE (1) DE2961033D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407205B (en) * 1998-04-27 2001-01-25 Va Tech Elin Transformatoren G Induction coil
FI117528B (en) * 2004-06-11 2006-11-15 Abb Oy Chilled choke assembly in several steps
JP6088605B1 (en) 2015-08-31 2017-03-01 ファナック株式会社 Robot system using visual sensor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE406399C (en) * 1919-09-23 1924-11-21 Siemens Schuckertwerke G M B H Transformers and reactors with gaps in the iron
FR619593A (en) * 1925-12-05 1927-04-05 Alsacienne Constr Meca Process for cooling the upper cylinder head of transformers
DE723560C (en) * 1937-10-19 1942-08-06 Bbc Brown Boveri & Cie transformer
DE820767C (en) * 1948-06-19 1951-11-12 Brown Ag Three-phase transformer
GB831439A (en) * 1957-04-11 1960-03-30 Gen Electric Co Ltd Improvements in or relating to magnetic core structures
US3172067A (en) * 1960-02-09 1965-03-02 Ferranti Ltd Electrical transformers having dismantlable laminated cores
US3189858A (en) * 1961-01-11 1965-06-15 Westinghouse Electric Corp Magnetic core structures
DE1231345B (en) * 1956-02-09 1966-12-29 Wilfried Fritzsche Dr Ing Layered rectangular core
DE1912031A1 (en) * 1968-03-28 1969-10-02 Bbc Brown Boveri & Cie Transformer core with cooling ducts parallel to the sheets and process for its manufacture

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR497023A (en) * 1918-02-28 1919-11-22 Bbc Brown Boveri & Cie Device for cooling air or oil transformers "case a"
US1546885A (en) * 1923-12-31 1925-07-21 Gen Electric Transformer core
GB229484A (en) * 1924-02-15 1925-02-26 Frederick Edmund Berry Improvements in or relating to electric transformers
FR630070A (en) * 1926-03-12 1927-11-23 Savoisienne Const Elec Improvement brought to the construction of magnetic cores, formed from stacked sheets, for cooling
DE730718C (en) * 1938-08-03 1943-01-16 Bbc Brown Boveri & Cie transformer
US2910663A (en) * 1954-12-29 1959-10-27 Gen Electric Transformer core clamp connector
GB1102562A (en) * 1964-05-25 1968-02-07 English Electric Co Ltd Electrical reactors

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE406399C (en) * 1919-09-23 1924-11-21 Siemens Schuckertwerke G M B H Transformers and reactors with gaps in the iron
FR619593A (en) * 1925-12-05 1927-04-05 Alsacienne Constr Meca Process for cooling the upper cylinder head of transformers
DE723560C (en) * 1937-10-19 1942-08-06 Bbc Brown Boveri & Cie transformer
DE820767C (en) * 1948-06-19 1951-11-12 Brown Ag Three-phase transformer
DE1231345B (en) * 1956-02-09 1966-12-29 Wilfried Fritzsche Dr Ing Layered rectangular core
GB831439A (en) * 1957-04-11 1960-03-30 Gen Electric Co Ltd Improvements in or relating to magnetic core structures
US3172067A (en) * 1960-02-09 1965-03-02 Ferranti Ltd Electrical transformers having dismantlable laminated cores
US3189858A (en) * 1961-01-11 1965-06-15 Westinghouse Electric Corp Magnetic core structures
DE1912031A1 (en) * 1968-03-28 1969-10-02 Bbc Brown Boveri & Cie Transformer core with cooling ducts parallel to the sheets and process for its manufacture

Also Published As

Publication number Publication date
JPS6030088B2 (en) 1985-07-15
AT357236B (en) 1980-06-25
ATA882778A (en) 1979-11-15
EP0012739B1 (en) 1981-10-14
US4301437A (en) 1981-11-17
JPS5582422A (en) 1980-06-21
DE2961033D1 (en) 1981-12-24

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