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EP4078631B1 - Voltage transformer - Google Patents

Voltage transformer Download PDF

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Publication number
EP4078631B1
EP4078631B1 EP20839129.2A EP20839129A EP4078631B1 EP 4078631 B1 EP4078631 B1 EP 4078631B1 EP 20839129 A EP20839129 A EP 20839129A EP 4078631 B1 EP4078631 B1 EP 4078631B1
Authority
EP
European Patent Office
Prior art keywords
magnetic core
voltage transformer
leg
holder
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20839129.2A
Other languages
German (de)
French (fr)
Other versions
EP4078631A1 (en
Inventor
Wolfgang Knab
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.)
HSP Hochspannungsgeraete GmbH
Original Assignee
HSP Hochspannungsgeraete GmbH
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Publication of EP4078631A1 publication Critical patent/EP4078631A1/en
Application granted granted Critical
Publication of EP4078631B1 publication Critical patent/EP4078631B1/en
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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
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • H01F27/2885—Shielding with shields or electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase AC
    • H01F38/24—Voltage transformers
    • H01F38/26—Constructions

Definitions

  • the invention relates to a voltage converter.
  • the invention relates to a voltage transformer for a high-voltage switchgear.
  • a voltage transformer transforms high alternating voltages proportionally and with phase accuracy to lower values for measurement, protection, or control purposes.
  • an inductive voltage transformer typically has at least one magnetic core arranged in a metallic encapsulating housing, around which a primary winding and (at least) one secondary winding run.
  • the correct arrangement and adequate fixation of the active components (magnetic cores with windings) of the voltage transformer in the encapsulating housing are very important due to the nature of the high-voltage electric field. Incorrect arrangement or inadequate fixation of the active components can lead to damage or even total failure of the voltage transformer.
  • Inductive voltage transformers are known in which a magnetic core is connected to a cover by means of a holder.
  • the invention is based on the object of providing a voltage converter which is improved in particular with regard to the fastening but also the positioning of its active parts and the number of components.
  • the cover for example, closes the encapsulation housing of the voltage converter.
  • the design of the cover with a positioning socket for each magnetic core enables simple and precise positioning of each magnetic core without the need for positioning gauges or similar aids.
  • the holder of a magnetic core with two frame elements enables mechanical fixation of the magnetic core, which is mounted on a positioning socket, between the two frame elements.
  • the holder can clamp the magnetic core to the holder and generate electric fields.
  • the invention thus simplifies the assembly of the voltage converter and can reduce the number of components of the voltage converter for fixing and clamping the active parts and for generating electric fields in the desired manner.
  • the holder for each magnetic core has clamping elements that clamp the magnetic core to the holder.
  • the clamping elements of the holder for each magnetic core comprise two clamping elements and a clamping rod connecting the two clamping elements.
  • Each clamping element is arranged in a form-fitting manner between adjacent ends of the two frame elements of the holder, and the clamping rod runs along the winding leg of the magnetic core.
  • each clamping element of the magnetic core holder is arranged at a transition area between a side leg and the winding leg of the magnetic core.
  • the transition area has, for example, a curved surface against which the clamping element rests. This allows the clamping elements to be easily pressed against the curved surface of the transition area to clamp the magnetic core by sliding them along this surface on the tension rod.
  • Magnetic cores designed as cut tape cores have transition areas between the side legs and the winding leg with curved surfaces and are therefore particularly suitable for this embodiment of the invention.
  • each frame element is detachably connected to the cover, for example, by at least one screw connection. This allows the frame elements of the magnetic core holder to be easily mounted on the cover after the magnetic core has been positioned in a positioning socket.
  • FIG 1 shows a perspective view of a first embodiment of a voltage converter 1.
  • the voltage converter 1 is designed for single-phase alternating voltages.
  • the voltage converter 1 comprises a cover 3, a primary winding 5, a secondary winding, an electrode 7, a magnetic core 9 and a holder 11 for the magnetic core 9.
  • the magnetic core 9 comprises a winding leg 12, around which the primary winding 5 and the secondary winding are arranged, a base leg 13 spaced from the winding leg 12 and running parallel to the winding leg 12, and two side legs 14, each connecting the winding leg 12 and the base leg 13 and running perpendicular to the winding leg 12 and the base leg 13.
  • the magnetic core 9 is designed as a cut strip core.
  • the transition region 16 between a side leg 14 and the winding leg 12 and the transition region 17 between a side leg 14 and the base leg 13 each have a curved outer surface 19.
  • the primary winding 5 runs around the secondary winding, so that the secondary winding in Figure 1 is not visible.
  • One end of the primary winding 5 is connected to the electrode 7, which is arranged around a central portion of the primary winding 5.
  • the cover 3 has a positioning mount 21, which is designed to position the magnetic core 9 on the cover 3.
  • the base leg 13 of the magnetic core 9 is positively mounted on the positioning mount 21.
  • FIG 2 shows a section of the Figure 1 shown voltage transformer 1 in the area of the positioning detection 21 in a perspective view.
  • the bracket 11 comprises two frame elements 23, two clamping elements 25, a tension rod 27 and two screw elements 29.
  • Each clamping element 25 is arranged in a form-fitting manner between adjacent ends of the two frame elements 23 at a transition region 16 between a side leg 14 and the winding leg 12 of the magnetic core 9.
  • the tension rod 27 connects the two clamping elements 25 to one another and runs along the winding leg 12.
  • Each end region of the tension rod 27 is guided by a clamping element 33 and has a thread onto which a screw element 29 is screwed, which presses the clamping element 25 against the curved surface 19 of the transition region 16 between a side leg 14 and the winding leg 12.
  • FIG 3 shows a perspective view of a second embodiment of a voltage converter 1.
  • the voltage converter 1 is designed for three-phase alternating voltages.
  • the voltage converter 1 therefore has three magnetic cores 9, around each of which a primary winding 5 and a secondary winding are arranged.
  • Each magnetic core 9 is like the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1.
  • the winding legs 12 of the magnetic cores 9 are arranged in a star shape at an angle of 120 degrees to each other.
  • the base legs 13 of the magnetic cores 9 are analogous to the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1 are each mounted positively in a positioning socket 21 of a cover 3 of the voltage transformer 1.
  • the voltage transformer 1 has a holder 11 for each magnetic core 9, which, like the holder 11 of the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1 and is fastened to the cover 3 with a screw connection 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Graft Or Block Polymers (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Description

Die Erfindung betrifft einen Spannungswandler.The invention relates to a voltage converter.

Insbesondere betrifft die Erfindung einen Spannungswandler für eine Hochspannungsschaltanlage. Mit einem derartigen Spannungswandler werden hohe Wechselspannungen proportional und phasengenau zu Mess-, Schutz- oder Steuerungszwecken auf niedrigere Werte transformiert. Ein induktiver Spannungswandler weist dazu in der Regel wenigstens einen in einem metallischen Kapselungsgehäuse angeordneten Magnetkern auf, um den herum eine Primärwicklung und (wenigstens) eine Sekundärwicklung verlaufen. Die korrekte Anordnung und ausreichende Fixierung der Aktivteile (Magnetkerne mit Wicklungen) des Spannungswandlers in dem Kapselungsgehäuse sind dabei aus Gründen der Ausprägung des elektrischen Hochspannungsfeldes sehr wichtig, weil eine inkorrekte Anordnung oder ungenügende Fixierung der Aktivteile zu Beschädigungen bis hin zu Totalausfällen des Spannungswandlers führen kann.In particular, the invention relates to a voltage transformer for a high-voltage switchgear. Such a voltage transformer transforms high alternating voltages proportionally and with phase accuracy to lower values for measurement, protection, or control purposes. For this purpose, an inductive voltage transformer typically has at least one magnetic core arranged in a metallic encapsulating housing, around which a primary winding and (at least) one secondary winding run. The correct arrangement and adequate fixation of the active components (magnetic cores with windings) of the voltage transformer in the encapsulating housing are very important due to the nature of the high-voltage electric field. Incorrect arrangement or inadequate fixation of the active components can lead to damage or even total failure of the voltage transformer.

Aus der WO 2017/036715 A1 , der EP 2 887 368 A1 , der JP 2004 055740 A und der EP 2 144 261 A1 sind induktive Spannungswandler bekannt, bei denen jeweils ein Magnetkern mittels einer Halterung mit einem Deckel verbunden ist.From the WO 2017/036715 A1 , the EP 2 887 368 A1 , the JP 2004 055740 A and the EP 2 144 261 A1 Inductive voltage transformers are known in which a magnetic core is connected to a cover by means of a holder.

Der Erfindung liegt die Aufgabe zugrunde, einen Spannungswandler anzugeben, der insbesondere hinsichtlich der Befestigung aber auch Positionierbarkeit seiner Aktivteile und der Anzahl der Bauteile verbessert ist.The invention is based on the object of providing a voltage converter which is improved in particular with regard to the fastening but also the positioning of its active parts and the number of components.

Die Aufgabe wird erfindungsgemäß durch einen Spannungswandler mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved according to the invention by a voltage converter having the features of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the subclaims.

Der Deckel verschließt beispielsweise ein Kapselungsgehäuse des Spannungswandlers. Die Ausformung des Deckels mit einer Positionierfassung für jeden Magnetkern ermöglicht eine einfache und präzise Positionierung jedes Magnetkerns ohne Positionierlehren oder ähnliche Hilfsmittel. Die Halterung eines Magnetkerns mit zwei Rahmenelementen ermöglicht eine mechanische Fixierung des an einer Positionierfassung gelagerten Magnetkerns zwischen den beiden Rahmenelementen. Die Halterung vermag den Magnetkern mit der Halterung zu verspannen und elektrische Felder auszuprägen. Die Erfindung vereinfacht damit die Montage des Spannungswandlers und kann die Anzahl der Bauteile des Spannungswandlers zur Fixierung und Verspannung der Aktivteile und zur Ausbildung elektrischer Felder auf eine gewünschte Art reduzieren.The cover, for example, closes the encapsulation housing of the voltage converter. The design of the cover with a positioning socket for each magnetic core enables simple and precise positioning of each magnetic core without the need for positioning gauges or similar aids. The holder of a magnetic core with two frame elements enables mechanical fixation of the magnetic core, which is mounted on a positioning socket, between the two frame elements. The holder can clamp the magnetic core to the holder and generate electric fields. The invention thus simplifies the assembly of the voltage converter and can reduce the number of components of the voltage converter for fixing and clamping the active parts and for generating electric fields in the desired manner.

Bei der Erfindung weist die Halterung jedes Magnetkerns Spannelemente auf, durch die der Magnetkern mit der Halterung verspannt ist. Erfindungsgemäß umfassen die Spannelemente der Halterung jedes Magnetkerns zwei Klemmelemente und eine die beiden Klemmelemente verbindende Spannstange, jedes Klemmelement ist formschlüssig zwischen benachbarten Enden der beiden Rahmenelemente der Halterung angeordnet und die Spannstange verläuft entlang des Wicklungsschenkels des Magnetkerns. Dadurch ermöglicht die Halterung eines Magnetkerns die Verspannung des Magnetkerns mit der Halterung durch formschlüssig mit den beiden Rahmenelementen verbundene Klemmelemente, die an den Magnetkern gedrückt werden.In the invention, the holder for each magnetic core has clamping elements that clamp the magnetic core to the holder. According to the invention, the clamping elements of the holder for each magnetic core comprise two clamping elements and a clamping rod connecting the two clamping elements. Each clamping element is arranged in a form-fitting manner between adjacent ends of the two frame elements of the holder, and the clamping rod runs along the winding leg of the magnetic core. Thus, the holder for a magnetic core enables the magnetic core to be clamped to the holder by clamping elements that are positively connected to the two frame elements and pressed against the magnetic core.

Beispielsweise ist jedes Klemmelement der Halterung eines Magnetkerns an einem Übergangsbereich zwischen einem Seitenschenkel und dem Wicklungsschenkel des Magnetkerns angeordnet. Dabei weist der Übergangsbereich beispielsweise eine gebogene Oberfläche auf, an der das Klemmelement anliegt. Dadurch können die Klemmelemente zum Verspannen des Magnetkerns in einfacher Weise an die gebogene Oberfläche des Übergangsbereichs gedrückt werden, indem sie an der Spannstange entlang dieser Oberfläche verschoben werden. Beispielsweise weisen als Schnittbandkerne ausgeführte Magnetkerne Übergangsbereiche zwischen den Seitenschenkeln und dem Wicklungsschenkel mit gebogenen Oberflächen auf und eignen sich daher besonders für diese Ausgestaltung der Erfindung.For example, each clamping element of the magnetic core holder is arranged at a transition area between a side leg and the winding leg of the magnetic core. The transition area has, for example, a curved surface against which the clamping element rests. This allows the clamping elements to be easily pressed against the curved surface of the transition area to clamp the magnetic core by sliding them along this surface on the tension rod. Magnetic cores designed as cut tape cores have transition areas between the side legs and the winding leg with curved surfaces and are therefore particularly suitable for this embodiment of the invention.

Die Spannstange der Halterung jedes Magnetkerns weist beispielsweise wenigstens einen durch ein Klemmelement geführten Endbereich mit einem Gewinde auf, auf das ein Schraubelement geschraubt ist, das das Klemmelement an den Magnetkern drückt. Dadurch kann ein Magnetkern mit seiner Halterung in einfacher Weise durch das Anziehen wenigstens eines Schraubelements verspannt werden.The tension rod of the holder of each magnetic core, for example, has at least one end region with a thread, guided by a clamping element, onto which a screw element is screwed, which presses the clamping element against the magnetic core. This allows a magnetic core to be clamped to its holder in a simple manner by tightening at least one screw element.

Bei einer weiteren Ausgestaltung der Erfindung weist jedes Rahmenelement der Halterung jedes Magnetkerns eine Schirmung mit einer Oberfläche auf, die den um den Magnetkern herum angeordneten Wicklungen zugewandt ist. Die Schirmung verläuft beispielsweise auf beiden Seiten der um den Magnetkern herum angeordneten Wicklungen teilumfänglich um den Wicklungsschenkel des Magnetkerns und/oder entlang beider Seitenschenkel und/oder entlang des Basisschenkels. Bei diesen Ausgestaltungen der Erfindung umfasst die Halterung jedes Magnetkerns also an den Rahmenelementen angeordnete Schirmungen zum Abschirmen elektrischer Felder, beispielsweise um hohe Feldstärken an Kanten der Rahmenelemente zu vermeiden. Durch die in die Rahmenelemente integrierten Schirmungen können separate beziehungsweise zusätzliche Schirmungen vorteilhaft entfallen oder reduziert werden.In a further embodiment of the invention, each frame element of the holder for each magnetic core has a shield with a surface that faces the windings arranged around the magnetic core. The shield runs, for example, on both sides of the windings arranged around the magnetic core, partially around the winding leg of the magnetic core and/or along both side legs and/or along the base leg. In these embodiments of the invention, the holder for each magnetic core therefore comprises shields arranged on the frame elements for shielding electrical fields, for example to avoid high field strengths at the edges of the frame elements. The shields integrated into the frame elements advantageously allow separate or additional shields to be omitted or reduced.

Bei einer weiteren Ausgestaltung der Erfindung ist an der Positionierfassung jedes Magnetkerns der Basisschenkel des Magnetkerns formschlüssig gelagert. Mit anderen Worten wird bei dieser Ausgestaltung der Erfindung der Basisschenkel jedes Magnetkerns in einer Positionierfassung des Deckels gelagert. Diese Ausgestaltung der Erfindung ermöglicht eine platzsparende Ausführung des Spannungswandlers, bei der die Wicklungen des Spannungswandlers im Wesentlichen in zu dem Deckel orthogonalen Ebenen verlaufen.In a further embodiment of the invention, the base leg of each magnetic core is positively mounted on the positioning socket of each magnetic core. In other words, in this embodiment of the invention, the base leg of each magnetic core is mounted in a positioning socket of the cover. This embodiment of the invention enables a space-saving design of the voltage converter, in which the windings of the voltage converter run essentially in planes orthogonal to the cover.

Bei einer weiteren Ausgestaltung der Erfindung ist jedes Rahmenelement lösbar, beispielsweise durch wenigstens eine Schraubverbindung, mit dem Deckel verbunden. Dadurch können die Rahmenelemente der Halterung eines Magnetkerns in einfacher Weise nach der Positionierung des Magnetkerns in einer Positionierfassung an dem Deckel montiert werden.In a further embodiment of the invention, each frame element is detachably connected to the cover, for example, by at least one screw connection. This allows the frame elements of the magnetic core holder to be easily mounted on the cover after the magnetic core has been positioned in a positioning socket.

Bei einer weiteren Ausgestaltung der Erfindung weist der Spannungswandler drei Magnetkerne auf. Beispielsweise sind die Wicklungsschenkel der Magnetkerne sternförmig in einem Winkel von 120 Grad zueinander angeordnet. Dies ermöglicht insbesondere eine zweckmäßige Ausführung des Spannungswandlers für dreiphasige Wechselspannungen.In a further embodiment of the invention, the voltage converter has three magnetic cores. For example, the winding limbs of the magnetic cores are arranged in a star configuration at an angle of 120 degrees to each other. This enables, in particular, a practical design of the voltage converter for three-phase alternating voltages.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung von Ausführungsbeispielen, die im Zusammenhang mit den Zeichnungen näher erläutert werden. Dabei zeigen:

FIG 1
eine perspektivische Darstellung eines ersten Ausführungsbeispiels eines Spannungswandlers,
FIG 2
eine perspektivische Darstellung des in Figur 1 gezeigten Spannungswandlers im Bereich einer Positionierfassung,
FIG 3
eine perspektivische Darstellung eines zweiten Ausführungsbeispiels eines Spannungswandlers.
The above-described properties, features, and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more readily understood in connection with the following description of exemplary embodiments, which are explained in more detail in conjunction with the drawings.
FIG 1
a perspective view of a first embodiment of a voltage converter,
FIG 2
a perspective view of the Figure 1 shown voltage transformer in the area of a positioning detection,
FIG 3
a perspective view of a second embodiment of a voltage converter.

Einander entsprechende Teile sind in den Figuren mit denselben Bezugszeichen versehen.Corresponding parts are provided with the same reference numerals in the figures.

Figur 1 (FIG 1) zeigt eine perspektivische Darstellung eines ersten Ausführungsbeispiels eines Spannungswandlers 1. Der Spannungswandler 1 ist für einphasige Wechselspannungen ausgelegt. Der Spannungswandler 1 umfasst einen Deckel 3, eine Primärwicklung 5, eine Sekundärwicklung, eine Elektrode 7, einen Magnetkern 9 und eine Halterung 11 für den Magnetkern 9. Figure 1 (FIG 1 ) shows a perspective view of a first embodiment of a voltage converter 1. The voltage converter 1 is designed for single-phase alternating voltages. The voltage converter 1 comprises a cover 3, a primary winding 5, a secondary winding, an electrode 7, a magnetic core 9 and a holder 11 for the magnetic core 9.

Der Deckel 3 verschließt ein nicht dargestelltes Kapselungsgehäuse, in dem die Primärwicklung 5, die Sekundärwicklung, die Elektrode 7, der Magnetkern 9 und die Halterung 11 angeordnet sind.The cover 3 closes an encapsulating housing (not shown) in which the primary winding 5, the secondary winding, the electrode 7, the magnetic core 9 and the holder 11 are arranged.

Der Magnetkern 9 umfasst einen Wicklungsschenkel 12, um den herum die Primärwicklung 5 und die Sekundärwicklung angeordnet sind, einen von dem Wicklungsschenkel 12 beabstandeten und parallel zu dem Wicklungsschenkel 12 verlaufenden Basisschenkel 13 und zwei Seitenschenkel 14, die jeweils den Wicklungsschenkel 12 und den Basisschenkel 13 miteinander verbinden und senkrecht zu dem Wicklungsschenkel 12 und dem Basisschenkel 13 verlaufen. Der Magnetkern 9 ist als ein Schnittbandkern ausgebildet. Der Übergangsbereich 16 zwischen einem Seitenschenkel 14 und dem Wicklungsschenkel 12 und der Übergangsbereich 17 zwischen einem Seitenschenkel 14 und dem Basisschenkel 13 weisen jeweils eine gebogene außenliegende Oberfläche 19 auf. Die Primärwicklung 5 verläuft um die Sekundärwicklung herum, so dass die Sekundärwicklung in Figur 1 nicht sichtbar ist. Ein Ende der Primärwicklung 5 ist mit der Elektrode 7 verbunden, die um einen Mittelabschnitt der Primärwicklung 5 herum angeordnet ist.The magnetic core 9 comprises a winding leg 12, around which the primary winding 5 and the secondary winding are arranged, a base leg 13 spaced from the winding leg 12 and running parallel to the winding leg 12, and two side legs 14, each connecting the winding leg 12 and the base leg 13 and running perpendicular to the winding leg 12 and the base leg 13. The magnetic core 9 is designed as a cut strip core. The transition region 16 between a side leg 14 and the winding leg 12 and the transition region 17 between a side leg 14 and the base leg 13 each have a curved outer surface 19. The primary winding 5 runs around the secondary winding, so that the secondary winding in Figure 1 is not visible. One end of the primary winding 5 is connected to the electrode 7, which is arranged around a central portion of the primary winding 5.

Der Deckel 3 weist eine Positionierfassung 21 auf, die dazu eingerichtet ist, den Magnetkern 9 an dem Deckel 3 zu positionieren. An der Positionierfassung 21 ist der Basisschenkel 13 des Magnetkerns 9 formschlüssig gelagert.The cover 3 has a positioning mount 21, which is designed to position the magnetic core 9 on the cover 3. The base leg 13 of the magnetic core 9 is positively mounted on the positioning mount 21.

Figur 2 (FIG 2) zeigt einen Ausschnitt des in Figur 1 gezeigten Spannungswandlers 1 im Bereich der Positionierfassung 21 in einer perspektivischen Darstellung. Figure 2 (FIG 2 ) shows a section of the Figure 1 shown voltage transformer 1 in the area of the positioning detection 21 in a perspective view.

Die Halterung 11 umfasst zwei Rahmenelemente 23, zwei Klemmelemente 25, eine Spannstange 27 und zwei Schraubelemente 29.The bracket 11 comprises two frame elements 23, two clamping elements 25, a tension rod 27 and two screw elements 29.

Die Rahmenelemente 23 sind auf einander gegenüberliegenden Seiten des Magnetkerns 9 angeordnet und verlaufen jeweils entlang der beiden Seitenschenkel 14 und des Basisschenkels 13. Die Rahmenelemente 23 haben damit jeweils eine im Wesentlichen U-förmige Gestalt. Jedes Rahmenelement 23 ist durch eine Schraubverbindung 31 lösbar mit dem Deckel 3 verbunden. Ferner weist jedes Rahmenelement 23 eine Schirmung 33 mit einer gewölbten Oberfläche auf, die den um den Magnetkern 9 herum angeordneten Wicklungen (Primärwicklung 5, Sekundärwicklung) zugewandt ist. Die Schirmung 33 verläuft auf beiden Seiten der Wicklungen teilumfänglich um den Wicklungsschenkel 12 sowie entlang beider Seitenschenkel 14 und des Basisschenkels 13, wobei die Schirmungen 33 der beiden Rahmenelemente 23 einander nicht berühren. Insbesondere sind die Schirmungen 33 der beiden Rahmenelemente 23 im Bereich des Wicklungsschenkels 12 auf beiden Seiten der Wicklungen durch jeweils einen Spalt 35 voneinander beabstandet, der eine elektrische Verbindung der Rahmenelemente 23 in dem Kernfenster im elektromagnetischen Nahfeld der Wicklungen verhindert.The frame elements 23 are arranged on opposite sides of the magnetic core 9 and each run along the two side legs 14 and the base leg 13. The frame elements 23 thus each have a substantially U-shaped configuration. Each frame element 23 is detachably connected to the cover 3 by a screw connection 31. Furthermore, each frame element 23 has a shield 33 with a curved surface that faces the windings (primary winding 5, secondary winding) arranged around the magnetic core 9. The shield 33 runs on both sides of the windings, partially circumferentially around the winding leg 12, as well as along both side legs 14 and the base leg 13, whereby the shields 33 of the two frame elements 23 do not touch each other. In particular, the shields 33 of the two frame elements 23 in the region of the winding leg 12 are spaced from each other on both sides of the windings by a gap 35 which prevents an electrical connection of the frame elements 23 in the core window in the electromagnetic near field of the windings.

Jedes Klemmelement 25 ist formschlüssig zwischen benachbarten Enden der beiden Rahmenelemente 23 an einem Übergangsbereich 16 zwischen einem Seitenschenkel 14 und dem Wicklungsschenkel 12 des Magnetkerns 9 angeordnet. Die Spannstange 27 verbindet die beiden Klemmelemente 25 miteinander und verläuft entlang des Wicklungsschenkels 12. Jeder Endbereich der Spannstange 27 ist durch ein Klemmelement 33 geführt und weist ein Gewinde auf, auf das ein Schraubelement 29 geschraubt ist, das das Klemmelement 25 an die gebogene Oberfläche 19 des Übergangsbereichs 16 zwischen einem Seitenschenkel 14 und dem Wicklungsschenkel 12 drückt.Each clamping element 25 is arranged in a form-fitting manner between adjacent ends of the two frame elements 23 at a transition region 16 between a side leg 14 and the winding leg 12 of the magnetic core 9. The tension rod 27 connects the two clamping elements 25 to one another and runs along the winding leg 12. Each end region of the tension rod 27 is guided by a clamping element 33 and has a thread onto which a screw element 29 is screwed, which presses the clamping element 25 against the curved surface 19 of the transition region 16 between a side leg 14 and the winding leg 12.

Figur 3 (FIG 3) zeigt eine perspektivische Darstellung eines zweiten Ausführungsbeispiels eines Spannungswandlers 1. Der Spannungswandler 1 ist für dreiphasige Wechselspannungen ausgelegt. Der Spannungswandler 1 weist daher drei Magnetkerne 9 auf, um die herum jeweils eine Primärwicklung 5 und eine Sekundärwicklung angeordnet sind. Jeder Magnetkern 9 ist wie der Magnetkern 9 des in den Figuren 1 und 2 gezeigten Spannungswandlers 1 ausgebildet. Die Wicklungsschenkel 12 der Magnetkerne 9 sind sternförmig in einem Winkel von 120 Grad zueinander angeordnet. Die Basisschenkel 13 der Magnetkerne 9 sind analog zu dem Magnetkern 9 des in den Figuren 1 und 2 gezeigten Spannungswandlers 1 jeweils formschlüssig in einer Positionierfassung 21 eines Deckels 3 des Spannungswandlers 1 gelagert. Ferner weist der Spannungswandler 1 für jeden Magnetkern 9 eine Halterung 11 auf, die wie die Halterung 11 des Magnetkerns 9 des in den Figuren 1 und 2 gezeigten Spannungswandlers 1 ausgebildet und mit einer Schraubverbindung 31 an dem Deckel 3 befestigt ist. Figure 3 (FIG 3 ) shows a perspective view of a second embodiment of a voltage converter 1. The voltage converter 1 is designed for three-phase alternating voltages. The voltage converter 1 therefore has three magnetic cores 9, around each of which a primary winding 5 and a secondary winding are arranged. Each magnetic core 9 is like the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1. The winding legs 12 of the magnetic cores 9 are arranged in a star shape at an angle of 120 degrees to each other. The base legs 13 of the magnetic cores 9 are analogous to the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1 are each mounted positively in a positioning socket 21 of a cover 3 of the voltage transformer 1. Furthermore, the voltage transformer 1 has a holder 11 for each magnetic core 9, which, like the holder 11 of the magnetic core 9 of the Figures 1 and 2 shown voltage transformer 1 and is fastened to the cover 3 with a screw connection 31.

Obwohl die Erfindung im Detail durch bevorzugte Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Ansprüche zu verlassen.Although the invention has been illustrated and described in detail by means of preferred embodiments, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of the claims.

Claims (13)

  1. Voltage transformer (1), comprising
    - at least one magnetic core (9) having a winding leg (12) around which windings of the voltage transformer (1) are arranged, a base leg (13) spaced apart from the winding leg (12), and two side legs (14) which each interconnect the winding leg (12) and the base leg (13),
    - a cover (3) which comprises a positioning receptacle (21) for each magnetic core (9), in which receptacle the magnetic core (9) is positioned on the cover (3),
    - a holder (11) for each magnetic core (9), comprising two mutually spaced frame elements (23) which extend on mutually opposing sides of the magnetic core (9), in each case along the two side legs (14) and the base leg (13), and are in each case connected to the cover (3),
    wherein
    - the holder (11) of each magnetic core (9) comprises tensioning elements (25, 27) by which the magnetic core (9) is braced with the holder (11),
    characterised in that
    - the tensioning elements (25, 27) of the holder (11) of each magnetic core (9) comprise two clamping elements (25) and a tie rod (27) connecting the two clamping elements (25), each clamping element (25) is arranged in a form-fitting manner between adjacent ends of the two frame elements (23) of the holder (11) and the tie rod (27) extends along the winding leg (12) of the magnetic core (9).
  2. Voltage transducer (1) according to claim 1, wherein each clamping element (25) is arranged at a transition region (16) between a side leg (14) and the winding leg (12) of the magnetic core (9).
  3. Voltage transducer (1) according to claim 2, wherein the transition region (16) comprises a curved surface (19) on which the clamping element (25) rests.
  4. Voltage transducer (1) according to any of claims 1 to 3, wherein the tie rod (27) of the holder (11) of each magnetic core (9) comprises at least one end region which is guided through a clamping element (25) and comprises a thread, onto which a screw element (29) is screwed which presses the clamping element (25) onto the magnetic core (9).
  5. Voltage transformer (1) according to any of the preceding claims, wherein each frame element (23) of the holder (11) of each magnetic core (9) comprises a shielding (33) having a surface which faces the windings arranged around the magnetic core (9).
  6. Voltage transformer (1) according to claim 5, wherein the shielding (33) extends on both sides of the windings arranged around the magnetic core (9), partially around the winding leg (12) of the magnetic core (9).
  7. Voltage transformer (1) according to either claim 5 or claim 6, wherein the shielding (33) extends along both side legs (14) of the magnetic core (9).
  8. Voltage transformer (1) according to any of claims 5 to 7, wherein the shielding (33) extends along the base leg (13) of the magnetic core (9).
  9. Voltage transformer (1) according to any of the preceding claims, wherein the base leg (13) of the magnetic core (9) is mounted in a form-fitting manner at the positioning recess (21) of each magnetic core (9).
  10. Voltage transformer (1) according to any of the preceding claims, wherein each frame element (23) is detachably connected to the cover (3).
  11. Voltage transformer (1) according to any of the preceding claims, wherein each frame element (23) is connected to the cover (3) by at least one screw connection (31).
  12. Voltage transformer (1) according to any of the preceding claims comprising three magnetic cores (9).
  13. Voltage transformer (1) according to claim 12, wherein the winding legs (12) of the magnetic cores (9) are arranged in a start shape at an angle of 120 degrees relative to one another.
EP20839129.2A 2020-01-30 2020-12-30 Voltage transformer Active EP4078631B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020201100.1A DE102020201100A1 (en) 2020-01-30 2020-01-30 Voltage converter
PCT/EP2020/088028 WO2021151614A1 (en) 2020-01-30 2020-12-30 Voltage transformer

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EP4078631A1 EP4078631A1 (en) 2022-10-26
EP4078631B1 true EP4078631B1 (en) 2025-05-21

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EP20839129.2A Active EP4078631B1 (en) 2020-01-30 2020-12-30 Voltage transformer

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EP (1) EP4078631B1 (en)
JP (1) JP7439272B2 (en)
KR (1) KR102745265B1 (en)
CN (1) CN115151986A (en)
DE (1) DE102020201100A1 (en)
WO (1) WO2021151614A1 (en)

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CN116825503B (en) * 2023-04-10 2025-07-18 山东泰开互感器有限公司 An electromagnetic voltage transformer body for GIS and a manufacturing method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3331848B2 (en) * 1996-01-23 2002-10-07 日新電機株式会社 Instrument transformer
JP3387756B2 (en) 1996-11-25 2003-03-17 東光電気株式会社 Transformers for gas insulated instruments
JP2002124424A (en) 2000-10-13 2002-04-26 Toshiba Corp Mounting method of instrument transformer and instrument transformer
JP2003007553A (en) * 2001-06-19 2003-01-10 Mitsubishi Electric Corp Transformer for gas insulation instrument with disconnector
JP3832389B2 (en) * 2002-06-12 2006-10-11 日新電機株式会社 Gas insulated instrument transformer
JP2004055740A (en) * 2002-07-18 2004-02-19 Nissin Electric Co Ltd Transformer for gas insulated meter
FR2933529B1 (en) * 2008-07-07 2010-09-03 Areva T & D Ag DISCONNECT DEVICE FOR SEPARATING OR CONNECTING TWO PARTS OF AN ELECTRIC CIRCUIT AMONG WHICH A VOLTAGE TRANSFORMER
EP2756508B1 (en) * 2011-09-13 2019-02-06 Danmarks Tekniske Universitet An integrated magnetics component
ES2676723T3 (en) * 2013-12-20 2018-07-24 Siemens Aktiengesellschaft Gas insulated transducer with separating device
DE102015216861A1 (en) 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Active part unit of a transducer and transducer
DE102015216860A1 (en) * 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Rim electrode and winding arrangement of a transducer

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JP2023514507A (en) 2023-04-06
KR20220129075A (en) 2022-09-22
JP7439272B2 (en) 2024-02-27
WO2021151614A1 (en) 2021-08-05
EP4078631A1 (en) 2022-10-26
CN115151986A (en) 2022-10-04
DE102020201100A1 (en) 2021-08-05

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