EP0117460A1 - Three-phase choke with five-legged magnetic core - Google Patents

Three-phase choke with five-legged magnetic core Download PDF

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Publication number
EP0117460A1
EP0117460A1 EP84101188A EP84101188A EP0117460A1 EP 0117460 A1 EP0117460 A1 EP 0117460A1 EP 84101188 A EP84101188 A EP 84101188A EP 84101188 A EP84101188 A EP 84101188A EP 0117460 A1 EP0117460 A1 EP 0117460A1
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European Patent Office
Prior art keywords
yoke
magnetic
legs
core
leg
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EP84101188A
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German (de)
French (fr)
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Donald Dr. Brandes
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Transformatoren Union AG
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Transformatoren Union AG
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    • 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
    • H01F27/38—Auxiliary core members; Auxiliary coils 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
    • H01F27/24—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
    • 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 three-phase choke coil with a five-legged core, the three wound core legs of which are constructed from gaps that enclose gaps filled with non-magnetic material and with reduced cross sections in the yokes and the yoke legs compared to the cross section of the wound core legs.
  • Choke coils are used in electricity supply networks to compensate for capacitive reactive power.
  • Single-phase chokes are often used for high voltages and high reactive powers.
  • a more economical solution would be possible in many cases by using three-phase choke coils because they require less investment both in the costs for the choke coil itself and for its installation in a system.
  • the use of a three-phase choke coil as a structural unit with a five-legged core is expedient. Similar to large transformers with five-leg cores, three core legs are wound here and the unwound outer legs serve as magnetic inferences. As a result, the inductances of the inductor are fully guaranteed in the case of asymmetrical voltage conditions.
  • the loads in the yoke sections between the wound legs on the one hand and on the other hand in the back yoke legs are very different in a choke coil with five-legged core.
  • the yoke sections represent pure iron paths and therefore have a very low magnetic resistance. Even if the back yoke legs are well nested with the yoke plates, saturation occurs locally in the nesting location, so that the resistance of the back yoke is relatively large compared to that of the yoke sections. The result of this is that the magnetic flux closes over the yokes and leads to high induction and thus to high losses.
  • the invention is based on the object of forcing a predetermined distribution of the magnetic flux in a five-legged core with optimized iron cross sections for three-phase choke coils and with non-magnetic gaps in core legs carrying windings in the individual yoke sections and in the yoke legs.
  • This object is achieved for a three-phase choke coil of the type mentioned in that the magnetic resistance between the central core leg and each of the outer of the wound core leg is greater than the magnetic resistance in each of the two magnetic inferences about the yoke ends and the yoke legs and in that these magnetic resistances are essentially determined by the thickness of gaps filled with non-magnetic material at least in the upper yoke and between its ends and the yoke legs.
  • the magnetic resistance between the central core leg and each of the outer of the wound core legs is twice as large as the magnetic resistance in each of the two magnetic yokes, so that the amount in the yokes and the yoke legs large magnetic fluxes occur.
  • At least the upper yoke is advantageously divided into three sections of equal size, each of which is assigned to a core leg and held by an associated pressing device, the pressing devices of the individual core legs working independently of one another.
  • a pull rod arranged centrally in the core leg is provided in each of the pressing devices for absorbing parallel tensile forces.
  • a common press construction of the three yoke parts receives inserts made of non-magnetic material, e.g. made of chromium-nickel steel in order to avoid preferential flow and consequently high eddy current losses.
  • the yoke legs are expediently additionally braced with the yokes.
  • Three-phase choke coils designed according to the invention are very advantageous because the flux distribution of the magnetic flux can be optimally adjusted through the additional gaps provided which are filled with non-magnetic material, and because each of the core legs can be optimally braced with the associated winding or windings.
  • the additional gaps influence the inductance of the three-phase choke coil only relatively little because they are overall much smaller than the sum of the gaps within the wound core legs between the laminated cores forming the latter.
  • the axial bracing which can be adjusted largely independently of one another on the individual core legs, is particularly advantageous with regard to low-noise designs of choke coils.
  • the active connections of the various magnetic resistances of a three-phase choke coil with a five-legged core can be seen from the schematic representation according to FIG.
  • the magnetic resistances R4, R5 and R6 of wound core legs 4, 5 and 6 are of the same size.
  • the magnetic resistors R3 formed by parts of a lower yoke and the magnetic resistors R2 formed by parts of an upper yoke lie between the ends of the core leg 5 and the ends of the core legs 4 and 6.
  • the yoke legs of the five-legged core form magnetic resistors R1.
  • the magnetic resistors R1, R2 and R3 are considerably smaller than the magnetic resistors R4, R5 and R6.
  • At least one magnetic resistor R2 and R3 each lie in series with one another in one of the possible closed magnetic flux circuits with the magnetic resistors R4, R5 and R6.
  • one of the magnetic resistors R1 is in series with the magnetic resistor R4 or R6.
  • Fig. 2 shows in a U-shaped frame made of a lower yoke 3 and yoke legs 11 core legs 4, 5 and 6, each of which carries a winding 10.
  • the core legs 4, 5 and 6 are constructed in the usual way from laminated cores, between which gaps filled with non-magnetic material are provided for determining the magnetic resistance R4, R5 and R6 they represent.
  • Columns / provided between yoke sections 7 are twice as large as corresponding column 1 between the upper ends of the back legs 11 and the yoke sections 7 adjacent to them.
  • Columns 1 and 2 contain inserts made of non-magnetic material.
  • a magnetic flux driven by the windings 10 through the core legs 4, 5 and 6 is distributed in the desired manner onto the yoke sections 7, the yoke legs 11 and the lower yoke 3 in such a way that supersaturations in the individual iron parts guiding the magnetic flux are excluded and, moreover, the forced flow division achieves an optimum for the losses occurring in the iron.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Silicon Compounds (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

Mit Wicklungen (10) versehene Kernschenkel (4, 5, 6) sind bei derartigen Drosselspulen üblicherweise aus mit nicht magnetischem Werkstoff gefüllte Spalte einschließenden Blechpaketen aufgebaut, wobei der Querschnitt der bewickelten Kernschenkel (4, 5, 6) größer ist als die Querschnitte der Joche (3,7) und der Rückschlußschenkel (11). Erfindungsgemäss ist der Fünfschenkelkern so gestaltet, daß der magnetische Widerstand (R2 plus R3) zwischen dem mittleren Kernschenkel (5) und jedem der äußeren der bewickelten Kernschenkel (4, 6) größer ist als der magnetische Widerstand (R1) in jedem der beiden magnetischen Rückschlüße über die Jochenden und die Rückschlußschenkel (11). Die Größe dieser magnetischen Widerstände (R1, R2, R3) ist im wesentlichen durch die Stärke von mit nicht magnetischem Werkstoff gefüllte Spalte (1, 2) mindestens im oberen Joch sowie zwischen den Jochenden und den Rückschlußschenkeln (11) bestimmt. Durch die erfindungsgemäße Verteilung der magnetischen Widerstände lassen sich Drehstromdrosselspulen mit Fünfschenkelkernen hinsichtlich der Verteilung des Magnetflusses sehr gut optimieren, so daß sie als physikalisch gleichwertiger Ersatz für Einphasendrosselspulen einsetzbar sind.In such choke coils, core legs (4, 5, 6) provided with windings (10) are usually constructed from laminated cores including gaps filled with non-magnetic material, the cross section of the wound core legs (4, 5, 6) being larger than the cross sections of the yokes (3.7) and the yoke leg (11). According to the five-legged core is designed so that the magnetic resistance (R2 plus R3) between the central core leg (5) and each of the outer core legs (4, 6) is greater than the magnetic resistance (R1) in each of the two magnetic yokes over the yoke ends and the yoke legs (11). The size of these magnetic resistors (R1, R2, R3) is essentially determined by the thickness of gaps (1, 2) filled with non-magnetic material at least in the upper yoke and between the yoke ends and the yoke legs (11). The inventive distribution of the magnetic resistors allows three-phase choke coils with five-leg cores to be very well optimized with regard to the distribution of the magnetic flux, so that they can be used as a physically equivalent replacement for single-phase choke coils.

Description

Die Erfindung betrifft eine Drehstromdrosselspule mit Fünfschenkelkern, dessen drei bewickelte Kernschenkel aus mit nicht magnetischem Werkstoff gefüllte Spalte einschließenden Blechpaketen aufgebaut sind und mit gegenüber dem Querschnitt der bewickelten Kernschenkel reduzierten Querschnitten in den Jochen und den Rückschlußschenkeln.The invention relates to a three-phase choke coil with a five-legged core, the three wound core legs of which are constructed from gaps that enclose gaps filled with non-magnetic material and with reduced cross sections in the yokes and the yoke legs compared to the cross section of the wound core legs.

In Elektrizitätsversorgungsnetzen werden zur Kompensation kapazitiver Blindleistungen Drosselspulen benutzt. Für hohe Spannungen und für große Blindleistungen werden häufig Einphasendrosselspulen eingesetzt. Eine wirtschaftlichere Lösung wäre jedoch vielfach durch Verwendung von Drehstromdrosselspulen möglich, weil diese ein geringeres Investment sowohl in den Kosten für die Drosselspule selbst, als auch für deren Aufstellung in einer Anlage erfordern.Choke coils are used in electricity supply networks to compensate for capacitive reactive power. Single-phase chokes are often used for high voltages and high reactive powers. However, a more economical solution would be possible in many cases by using three-phase choke coils because they require less investment both in the costs for the choke coil itself and for its installation in a system.

Ist dabei eine so geringe Nullimpedanz erforderlich, wie sie bei Einphasendrosselspulen vorliegt, so ist der Einsatz einer Drehstromdrosselspule als eine Baueinheit mit Fünfschenkelkern zweckmäßig. Ähnlich wie bei Großtransformatoren mit Fünfschenkelkernen sind hierbei drei Kernschenkel bewickelt und die unbewickelten Außenschenkel dienen als magnetische Rückschlüsse. Dadurch sind bei unsymmetrischen Spannungsverhältnissen die Induktivitäten der Drosselspule voll gewährleistet.If a low zero impedance is required, as is the case with single-phase choke coils, the use of a three-phase choke coil as a structural unit with a five-legged core is expedient. Similar to large transformers with five-leg cores, three core legs are wound here and the unwound outer legs serve as magnetic inferences. As a result, the inductances of the inductor are fully guaranteed in the case of asymmetrical voltage conditions.

Durch die DE-OS 27 28 904 ist ein Drehstromtransformator mit infolge hohem Streuflußanteil drosselähnlichem Verhalten bekannt. Bei diesem Transformator sind in üblicher Krt 2 Po/15.02.1983 Weise drei Kernschenkel bewickelt, deren Enden durch Joche zur Führung des Magnetflusses miteinander verbunden sind. Durch das Kapitel I Nr. 7 "Der Flinfschenkelkern für Drehstrom" in dem Buch "Die Transformatoren" von Rudolf Küchler ist darüber hinaus die allgemeine Verwendbarkeit von Fünfschenkelkernen bekannt, in denen sich die Querschnittsflächen der Kernschenkel zu denen der Joche und Rückschlußschenkel wie 1,73 zu 1 verhalten. Die bewickelten Kernschenkel sind dabei für Drosseln gemäß der DE-OS 30 40 742 oder der DE-OS 30 40 724 aus Blechpaketen aufgebaut, die mit nicht magnetischem Werkstoff gefüllte Spalte einschließen.From DE-OS 27 28 904 a three-phase transformer is known with a choke-like behavior due to high stray flux. In this transformer there are 2 Po / 15.02.1983 Way three core legs wound, the ends of which are connected by yokes for guiding the magnetic flux. Chapter I No. 7 "The five-legged core for three-phase current" in the book "The Transformers" by Rudolf Küchler also discloses the general usability of five-legged cores, in which the cross-sectional areas of the core leg to that of the yoke and yoke leg as 1.73 behave to 1. The wound core legs are constructed for chokes according to DE-OS 30 40 742 or DE-OS 30 40 724 from laminated cores which include gaps filled with non-magnetic material.

Bei diesen Verhältnissen mit durchgehenden Jochen sind bei einer Drosselspule mit Fünfschenkelkern die Belastungen in den Jochabschnitten zwischen den bewickelten Schenkeln einerseits und andererseits in den Rückschlußschenkeln sehr unterschiedlich. Die Jochabschnitte stellen reine Eisenwege dar und haben damit einen sehr kleinen magnetischen Widerstand. Selbst wenn die Rückschlußschenkel mit den Jochblechen gut verschachtelt sind, kommt es in der Verschachtelungsstelle örtlich zu einer Sättigung, so daß der Widerstand des Rückschlusses, verglichen mit dem der Jochabschnitte relativ groß ist. Dies führt im Ergebnis dazu, daß sich der Magnetfluß über die Joche schließt und in diesen zu hohen Induktionen und somit auch zu hohen Verlusten führt. Noch ungünstiger sind diese Verhältnisse, wenn das obere Joch zur Pressung der Schenkel beweglich ausgeführt wird, weil dann zwischen dem jeweiligen Rückschlußschenkel und dem oberen Jochbalken ein unmagnetischer Spalt besteht. Diese Einstellbarkeit ist darüber hinaus aus Geräuschgründen erwünscht.Under these conditions with continuous yokes, the loads in the yoke sections between the wound legs on the one hand and on the other hand in the back yoke legs are very different in a choke coil with five-legged core. The yoke sections represent pure iron paths and therefore have a very low magnetic resistance. Even if the back yoke legs are well nested with the yoke plates, saturation occurs locally in the nesting location, so that the resistance of the back yoke is relatively large compared to that of the yoke sections. The result of this is that the magnetic flux closes over the yokes and leads to high induction and thus to high losses. These conditions are even more unfavorable if the upper yoke is designed to be movable to press the legs, because then there is a non-magnetic gap between the respective yoke leg and the upper yoke beam. This adjustability is also desirable for reasons of noise.

Der Erfindung liegt nun die Aufgabe zugrunde, in einem Fünfschenkelkern mit optimierten Eisenquerschnitten für Dreiphasen-Drosselspulen und mit nicht magnetischen Spalten in Wicklungen tragenden Kernschenkeln in den einzelnen Jochabschnitten und in den Rückschlußschenkeln eine vorher bestimmte Verteilung des Magnetflusses zu erzwingen.The invention is based on the object of forcing a predetermined distribution of the magnetic flux in a five-legged core with optimized iron cross sections for three-phase choke coils and with non-magnetic gaps in core legs carrying windings in the individual yoke sections and in the yoke legs.

Diese Aufgabe wird für eine Drehstromdrosselspule der eingangs genannten Art dadurch gelöst, daß der magnetische Widerstand zwischen dem mittleren Kernschenkel und jedem der äußeren der bewickelten Kernschenkel größer ist als der magnetische Widerstand in jedem der beiden magnetischen Rückschlüsse über die Jochenden und die Rückschlußschenkel und dadurch, daß diese magnetischalWiderstände im wesentlichen durch die Stärke von mit nicht magnetischem Werkstoff gefüllte Spalte mindestens im oberen Joch sowie zwischen dessen Enden und den Rückschlußschenkeln bestimmt sind.This object is achieved for a three-phase choke coil of the type mentioned in that the magnetic resistance between the central core leg and each of the outer of the wound core leg is greater than the magnetic resistance in each of the two magnetic inferences about the yoke ends and the yoke legs and in that these magnetic resistances are essentially determined by the thickness of gaps filled with non-magnetic material at least in the upper yoke and between its ends and the yoke legs.

Nach zweckmäßigen Weiterbildungen der Erfindung ist vorgesehen, daß der magnetische Widerstand zwischen dem mittleren Kernschenkel und jedem der äußeren der bewickelten Kernschenkel doppelt so groß ist wie der magnetische Widerstand in jedem der beiden magnetischen Rückschlüsse, so daß in den Jochen und den Rückschlußschenkeln dem Betrage nach gleich große Magnetflüsse auftreten.According to expedient developments of the invention it is provided that the magnetic resistance between the central core leg and each of the outer of the wound core legs is twice as large as the magnetic resistance in each of the two magnetic yokes, so that the amount in the yokes and the yoke legs large magnetic fluxes occur.

Dabei ist in vorteilhafter Weise mindestens das obere Joch in drei gleich große Abschnitte unterteilt, von denen jeder je einem Kernschenkel zugeordnet und von einer zugehörigen Preßeinrichtung gehalten ist, wobei die Preßeinrichtungen der einzelnen Kernschenkel unabhängig voneinander arbeiten.In this case, at least the upper yoke is advantageously divided into three sections of equal size, each of which is assigned to a core leg and held by an associated pressing device, the pressing devices of the individual core legs working independently of one another.

Nach weiteren vorteilhaften Ausgestaltungen der Erfindung ist in jeder der Preßeinrichtungen zur Aufnahme schenkelparalleler Zugkräfte eine zentrisch im Kernschenkel angeordnete Zugstange vorgesehen. Eine gemeinsame Preßkonstruktion der drei Jochteile erhält im Bereich der Jochspalte Einsätze aus unmagnetischem Material, z.B. aus Chromnickelstahl, um hier eine bevorzugte Flußführung und im Gefolge damit hohe Wirbelstromverluste zu vermeiden. Außerdem sind in zweckmäßiger Weise die Rückschlußschenkel mit den Jochen zusätzlich verspannt.According to further advantageous embodiments of the invention, a pull rod arranged centrally in the core leg is provided in each of the pressing devices for absorbing parallel tensile forces. A common press construction of the three yoke parts receives inserts made of non-magnetic material, e.g. made of chromium-nickel steel in order to avoid preferential flow and consequently high eddy current losses. In addition, the yoke legs are expediently additionally braced with the yokes.

Erfindungsgemäß ausgeführte Drehstromdrosselspulen sind sehr vorteilhaft, weil die Flußverteilung des Magnetflusses durch die vorgesehenen zusätzlichen mit unmagnetischem Werkstoff gefüllten Spalte optimal einstellbar ist, und weil außerdem jeder der Kernschenkel mit der oder den zugehörigen Wicklungen je für sich optimal verspannbar ist. Dabei beeinflussen die zusätzlichen Spalte die Induktivität der Drehstromdrosselspule nur verhältnismäßig wenig, weil sie insgesamt viel kleiner sind als die Summe der Spalte innerhalb der bewickelten Kernschenkel zwischen den die letzteren bildenden Blechpaketen. Die an den einzelnen Kernschenkeln weitgehend unabhhängig voneinander einstellbare axiale Verspannung ist insbesondere vorteilhaft im Hinblick auf geräuscharme Ausführungen von Drosselspulen.Three-phase choke coils designed according to the invention are very advantageous because the flux distribution of the magnetic flux can be optimally adjusted through the additional gaps provided which are filled with non-magnetic material, and because each of the core legs can be optimally braced with the associated winding or windings. The additional gaps influence the inductance of the three-phase choke coil only relatively little because they are overall much smaller than the sum of the gaps within the wound core legs between the laminated cores forming the latter. The axial bracing, which can be adjusted largely independently of one another on the individual core legs, is particularly advantageous with regard to low-noise designs of choke coils.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert.

  • Fig. 1 zeigt in einem Ersatzschaltbild die Verteilung der magnetischen Widerstände.
  • Fig. 2 stellt einen Längsschnitt durch eine Drehstromdrosselspule mit Fünfschenkelkern dar.
An embodiment of the invention is explained in more detail with reference to a drawing.
  • 1 shows the distribution of the magnetic resistances in an equivalent circuit diagram.
  • Fig. 2 shows a longitudinal section through a three-phase choke coil with five-legged core.

Der schematisierten Darstellungsform gemäß Figur 1 sind die Wirkverbindungen der verschiedenen magnetischen Widerstände einer Drehstromdrosselspule mit Fünfschenkelkern zu entnehmen. Darin sind die magnetischen Widerstände R4, R5 und R6 von bewickelten Kernschenkeln 4, 5 und 6 gleich groß. Zwischen den Enden des Kernschenkels 5 und den Enden der Kernschenkel 4 und 6 liegen die von Teilen eines unteren Joches gebildeten magnetischen Widerstände R3 und die von Teilen eines oberen Joches gebildeten magnetischen Widerstände R2. Die Rückschlußschenkel des Fünfschenkelkerns bilden hierbei magnetische Widerstände R1. Die magnetischen Widerstände R1, R2 und R3 sind erheblich kleiner als die magnetischen Widerstände R4, R5 und R6.The active connections of the various magnetic resistances of a three-phase choke coil with a five-legged core can be seen from the schematic representation according to FIG. The magnetic resistances R4, R5 and R6 of wound core legs 4, 5 and 6 are of the same size. The magnetic resistors R3 formed by parts of a lower yoke and the magnetic resistors R2 formed by parts of an upper yoke lie between the ends of the core leg 5 and the ends of the core legs 4 and 6. The yoke legs of the five-legged core form magnetic resistors R1. The magnetic resistors R1, R2 and R3 are considerably smaller than the magnetic resistors R4, R5 and R6.

Durch diese Anordnung liegen mindestens je ein magnetischer Widerstand R2 und R3 in Reihe miteinander in einem der möglichen geschlossenen Magnetflußkreise mit den magnetischen Widerständen R4, R5 bzw. R6. Dagegen liegt je einer der magnetischen Widerstände R1 für sich allein in Reihe mit dem magnetischen Widerstand R4 bzw. R6.With this arrangement, at least one magnetic resistor R2 and R3 each lie in series with one another in one of the possible closed magnetic flux circuits with the magnetic resistors R4, R5 and R6. In contrast, one of the magnetic resistors R1 is in series with the magnetic resistor R4 or R6.

Fig. 2 zeigt in einem U-förmigen Rahmen aus einem unteren Joch 3 und aus Rückschlußschenkeln 11 aufgebaute Kernschenkel 4, 5 und 6, von denen jeder eine Wicklung 10 trägt. Die Kernschenkel 4, 5 und 6 sind in üblicher Weise aus Blechpaketen aufgebaut, zwischen denen zur Bestimmung des von ihnen dargestellten magnetischen Widerstandes R4, R5 bzw. R6 mit nicht magnetischem Werkstoff angefüllte Spalte vorgesehen sind.Fig. 2 shows in a U-shaped frame made of a lower yoke 3 and yoke legs 11 core legs 4, 5 and 6, each of which carries a winding 10. The core legs 4, 5 and 6 are constructed in the usual way from laminated cores, between which gaps filled with non-magnetic material are provided for determining the magnetic resistance R4, R5 and R6 they represent.

Über jedem der Kernschenkel 4, 5 und 6 liegt je einer von drei Jochabschnitten 7, die gemeinsam ein oberes Joch bilden. Zwischen den Jochabschnitten 7 vorgesehene Spalte/sind doppelt so groß wie entsprechende Spalte 1 zwischen den oberen Enden der Rückschenkel 11 und den diesen benachbarten Jochabschnitten 7. In den Spalten 1 und 2 liegen Beilagen aus nicht magnetischem Werkstoff.One of three yoke sections 7, which together form an upper yoke, lies above each of the core legs 4, 5 and 6. Columns / provided between yoke sections 7 are twice as large as corresponding column 1 between the upper ends of the back legs 11 and the yoke sections 7 adjacent to them. Columns 1 and 2 contain inserts made of non-magnetic material.

Der mechanische Zusammenhalt dieser Anordnung wird in üblicher Weise durch im einzelnen nicht dargestellte Preßeinrichtungen 8 für die Wicklungen 10 und die Kernschenkel 4, 5 und 6 sowie durch eine zusätzliche im wesentlichen in Längsrichtung des oberen Joches wirkende Preßeinrichtung 9 gewährleistet. Die Preßeinrichtung 9 hält gleichzeitig die Beilagen in den Spalten 1 und 2.The mechanical cohesion of this arrangement is ensured in the usual way by pressing devices 8 (not shown in detail) for the windings 10 and the core legs 4, 5 and 6 and by an additional pressing device 9 which acts essentially in the longitudinal direction of the upper yoke. The pressing device 9 simultaneously holds the supplements in columns 1 and 2.

Durch die Anordnung und Gestaltung der Spalte 1 und 2 wird ein von den Wicklungen 10 durch die Kernschenkel 4, 5 und 6 getriebener magnetischer Fluß in gewünschter Weise so auf die Jochabschnitte 7, die Rückschlußschenkel 11 und das untere Joch 3 verteilt, daß Übersättigungen in den einzelnen den Magnetfluß führenden Eisenteilen ausgeschlossen sind und wobei außerdem durch die erzwungene Flußaufteilung ein Optimum für die im Eisen auftretenden Verluste erreicht ist.Due to the arrangement and design of the gaps 1 and 2, a magnetic flux driven by the windings 10 through the core legs 4, 5 and 6 is distributed in the desired manner onto the yoke sections 7, the yoke legs 11 and the lower yoke 3 in such a way that supersaturations in the individual iron parts guiding the magnetic flux are excluded and, moreover, the forced flow division achieves an optimum for the losses occurring in the iron.

Claims (5)

1. Drehstromdrosselspule mit Fünfschenkelkern, dessen drei bewickelte Kernschenkel aus mit nicht magnetischem Werkstoff gefüllte Spalte einschließenden Blechpaketen aufgebaut sind und mit gegenüber dem Querschnitt der bewickelten Kernschenkel reduzierten Querschnitten in den Jochen und den Rückschlußschenkeln, dadurch gekennzeichnet , - daß der magnetische Widerstand (R2 plus R3) zwischen dem mittleren Kernschenkel (5) und jedem der äußeren der bewickelten Kernschenkel (4, 6) größer ist als der magnetische Widerstand (R1) in jedem der beiden magnetischen Rückschlüsse über die Jochenden und die Rückschlußschenkel (11) und - daß diese magnetischen Widerstände (R1, R2, R3) im wesentlichen durch die Stärke von mit nicht magnetischem Werkstoff gefüllte Spalte (1, 2) mindestens im oberen Joch sowie zwischen Jochenden und Rückschlußschenkeln (11) bestimmt sind. 1. three-phase choke coil with five-legged core, the three wound core legs of which are constructed from laminated cores including gaps filled with non-magnetic material and with reduced cross sections in the yokes and the yoke legs compared to the cross section of the wound core legs, characterized in that - That the magnetic resistance (R2 plus R3) between the central core leg (5) and each of the outer of the wound core leg (4, 6) is greater than the magnetic resistance (R1) in each of the two magnetic conclusions about the yoke ends and the return leg (11) and - That these magnetic resistors (R1, R2, R3) are essentially determined by the thickness of gaps filled with non-magnetic material (1, 2) at least in the upper yoke and between yoke ends and yoke legs (11). 2. Drehstromdrosselspule nach Anspruch 1, adurch gekennzeichnet , daß der magnetische Widerstand (R2 plus R3) zwischen dem mittleren Kernschenkel (5) und jedem der äußeren der bewickelten Kernschenkel (4, 6) doppelt so groß ist wie der magnetische Widerstand (R1) in jedem der beiden magnetischen Rückschlüsse, so daß in den Jochen (3, 7) und den Rückschlußschenkeln (11) dem Betrage nach gleich große Magnetflüsse auftreten.2. three-phase choke coil according to claim 1, characterized in that the magnetic resistance (R2 plus R3) between the central core leg (5) and each of the outer of the wound core leg (4, 6) is twice as large as the magnetic resistance (R1) in each of the two magnetic inferences, so that the magnetic fluxes of the same magnitude occur in the yokes (3, 7) and the inference legs (11). 3. Drehstromdrosselspule nach Anspruch 1 und 2, dadurch gekennzeichnet , daß mindestens das obere Joch in drei gleich große Jochabschnitte (7) unterteilt ist, von denen jeder je einem Kernschenkel (4, 5, 6) zugeordnet und von einer zugehörigen axialen Preßeinrichtung (8) gehalten ist, wobei die Preßeinrichtungen (8) der einzelnen Kernschenkel (4, 5, 6) unabhängig voneinander arbeiten.3. three-phase choke coil according to claim 1 and 2, characterized in that at least the upper yoke is divided into three equally large yoke sections (7), each of which is associated with a core leg (4, 5, 6) and by an associated axial pressing device (8 ) is held, the Preßeinrich lines (8) of the individual core legs (4, 5, 6) work independently. 4. Drehstromdrosselspule nach Anspruch 1 bis 3, dadurch gekennzeichnet , daß in jeder der Preßeinrichtungen (8) zur Aufnahme schenkelparalleler Zugkräfte eine zentrisch im Kernschenkel (4, 5, 6) angeordnete Zugstange vorgesehen ist.4. three-phase choke coil according to claim 1 to 3, characterized in that in each of the pressing devices (8) for receiving leg-parallel tensile forces a centrally in the core leg (4, 5, 6) arranged pull rod is provided. 5. Drehstromdrosselspule nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß die Rückschlußschenkel (11) mit den Jochteilen (7) zusätzlich verspannt sind.5. three-phase choke coil according to claim 1 to 4, characterized in that the yoke legs (11) with the yoke parts (7) are additionally braced.
EP84101188A 1983-02-18 1984-02-06 Three-phase choke with five-legged magnetic core Withdrawn EP0117460A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3305708 1983-02-18
DE19833305708 DE3305708A1 (en) 1983-02-18 1983-02-18 THREE-PHASE THROTTLE COIL WITH FIFTH LEG CORE

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EP0117460A1 true EP0117460A1 (en) 1984-09-05

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US (1) US4531108A (en)
EP (1) EP0117460A1 (en)
JP (1) JPS59158511A (en)
BR (1) BR8400712A (en)
DE (1) DE3305708A1 (en)

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EP2088603A2 (en) * 2008-02-06 2009-08-12 ABB Technology AG Shunt reactor
EP2088603A3 (en) * 2008-02-06 2014-06-25 ABB Technology AG Shunt reactor
EP2560174A4 (en) * 2010-04-14 2018-01-24 Alexander Mikhailovich Bryantsev Three-phase electrical reactor with magnetic biasing
WO2017182544A1 (en) * 2016-04-20 2017-10-26 Wobben Properties Gmbh Polyphase inductor
WO2019219921A1 (en) * 2018-05-18 2019-11-21 Tdk Electronics Ag Reactor with high common mode inductance
EP4203293A4 (en) * 2020-08-24 2024-05-08 Hitachi Mitsubishi Hydro Corporation Modular multi-level power converter, and modular multi-level power conversion system

Also Published As

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JPS59158511A (en) 1984-09-08
US4531108A (en) 1985-07-23
DE3305708A1 (en) 1984-08-23
BR8400712A (en) 1984-09-25

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