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WO2021151614A1 - Voltage transformer - Google Patents

Voltage transformer Download PDF

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Publication number
WO2021151614A1
WO2021151614A1 PCT/EP2020/088028 EP2020088028W WO2021151614A1 WO 2021151614 A1 WO2021151614 A1 WO 2021151614A1 EP 2020088028 W EP2020088028 W EP 2020088028W WO 2021151614 A1 WO2021151614 A1 WO 2021151614A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic core
voltage converter
leg
winding
core
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.)
Ceased
Application number
PCT/EP2020/088028
Other languages
German (de)
French (fr)
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP20839129.2A priority Critical patent/EP4078631B1/en
Priority to KR1020227029427A priority patent/KR102745265B1/en
Priority to JP2022545155A priority patent/JP7439272B2/en
Priority to CN202080095301.0A priority patent/CN115151986A/en
Publication of WO2021151614A1 publication Critical patent/WO2021151614A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • H01F27/26Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266Fastening or mounting the core on casing or support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • H01F27/26Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263Fastening parts of the core together
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/288Shielding
    • H01F27/2885Shielding with shields or electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase AC
    • H01F38/24Voltage transformers
    • H01F38/26Constructions

Definitions

  • the invention relates to a voltage converter.
  • an inductive voltage converter generally 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 fixing of the active parts (magnetic cores with windings) of the voltage converter in the encapsulated housing are very important for reasons of the characteristics of the electrical high-voltage field, because an incorrect arrangement or insufficient fixing of the active parts can lead to damage or even total failure of the Voltage converter can lead.
  • the invention is based on the object of specifying a voltage converter which is improved, in particular with regard to the positioning of its active parts and the number of components.
  • the object is achieved by a voltage converter having the features of claim 1.
  • a voltage converter according to the invention comprises at least one magnetic core with a winding limb, around which windings of the voltage converter are arranged, a base limb spaced apart from the winding limb and two side legs, which each connect the winding leg and the base leg to one another,
  • a cover which has a positioning socket for each magnetic core, in which the magnetic core is positioned on the cover, and
  • a holder with two spaced apart frame elements which run on opposite sides of the magnetic core along the two side legs and the base leg and are each connected to the cover.
  • the cover closes, for example, an encapsulating housing of the voltage converter.
  • the shape of the cover with a positioning socket for each magnetic core enables simple and precise positioning of each magnetic core without positioning gauges or similar aids.
  • the mounting of a magnetic core with two frame elements enables a mechanical specific fixation of the magnetic core mounted on a positioning fixture between the two frame elements.
  • the holder can also brace the magnetic core with the holder and develop 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 bracing the active parts and for the formation of electrical fields in a desired way.
  • the holder has clamping elements for each magnetic core, by means of which the magnetic core is clamped to the holder.
  • the clamping elements of the holder of each magnetic core comprise two Klemmele elements and a clamping rod connecting the two clamping elements, each clamping element is positively connected between adjacent ends of the two frame elements of the holder angeord net and the tension rod runs along the winding's angle of the magnetic core.
  • each clamping element of the holder of a magnetic core is net angeord 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.
  • the clamping elements for tensioning the magnet core can be pressed in a simple manner against the curved surface of the transition area by being moved along this surface on the tension rod.
  • magnetic cores designed as cut tape cores have transition areas between the side legs and the winding legs with curved surfaces and are therefore particularly suitable for this embodiment of the invention.
  • the clamping rod of the holder of each magnetic core has, for example, at least one end region guided by a clamping element with a thread onto which a screw element is screwed which presses the clamping element against the magnetic core.
  • each frame element of the holder of each magnetic core has a screen with a surface facing the windings arranged around the magnetic core.
  • the shielding 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.
  • the holder of each magnetic core al so 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. Thanks to the shields integrated in the frame elements, separate te or additional shielding are advantageously omitted or reduced.
  • the base leg of the magnetic core is positively mounted on the positioning socket of each magnetic core.
  • the base leg of each magnetic core is mounted in a positioning mount of the cover.
  • each frame element is detachably connected to the cover, for example by at least one screw connection.
  • the voltage converter has three magnetic cores.
  • the winding legs of the magnet cores are arranged in a star shape at an angle of 120 degrees to one another. This enables in particular an expedient design of the voltage converter for three-phase alternating voltages.
  • FIG. 1 shows a perspective illustration of a first exemplary embodiment from a voltage converter
  • FIG. 2 shows a perspective view of the voltage converter shown in FIG. 1 in the area of a positioning detection
  • FIG 3 shows a perspective illustration of a second exemplary embodiment from a voltage converter.
  • FIG. 1 shows a perspective illustration of a first exemplary 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 cover 3 closes an encapsulation 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.
  • the magnetic core 9 comprises a winding limb 12 around which the primary winding 5 and the secondary winding are arranged, a base limb 13 spaced from the winding limb 12 and running parallel to the winding limb 12, and two side limbs 14, each of which is the winding limb 12 and the base limb 13 connect to one another and run perpendicular to the winding leg 12 and the base leg 13.
  • the magnetic core 9 is designed as a cut tape core.
  • the transition area 16 between a side leg 14 and the winding leg 12 and the transition area 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 cannot be seen in FIG.
  • One end of the primary winding 5 is with the Electrode 7 connected, which is arranged around a central portion of the primary winding 5 around.
  • the cover 3 has a positioning socket 21 which is designed to position the magnetic core 9 on the cover 3. On the positioning socket 21 of the base leg 13 of the magnetic core 9 is mounted in a form-fitting manner.
  • FIG. 2 shows a section of the voltage converter 1 shown in FIG. 1 in the area of the positioning socket 21 in a perspective illustration.
  • the holder 11 comprises two frame elements 23, two clamping elements 25, a tension rod 27 and two screw elements 29.
  • 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 shape.
  • Each frame element 23 is releasably connected to the cover 3 by a screw connection 31 a related party.
  • each frame element 23 has a shield 33 with a curved surface which faces the windings arranged around the magnet core 9 (primary winding 5, secondary winding).
  • the shield 33 runs on both sides of the windings partially around the winding leg 12 and along both side legs 14 and the base leg 13, the shields 33 of the two frame elements 23 do not touch each other.
  • the shields 33 of the two frame elements 23 in the area of the winding legs 12 are spaced apart 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.
  • Each clamping element 25 is form-fitting between adjacent ends of the two frame elements 23 at a transition area 16 between a side leg 14 and the winding Leg 12 of the magnetic core 9 is arranged.
  • the tension rod 27 connects the two clamping elements 25 together and ver runs along the winding leg 12.
  • Each end region of the tension rod 27 is guided through a clamping element 33 and has a thread on which a screw element 29 is screwed, the clamping element 25 to the curved Upper surface 19 of the transition region 16 between a side leg 14 and the winding leg 12 presses.
  • FIG. 3 shows a perspective illustration of a second exemplary 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 designed like the magnetic core 9 of the voltage converter 1 shown in FIGS.
  • the winding legs 12 of the magnetic cores 9 are arranged in a star shape at an angle of 120 degrees to one another.
  • the base legs 13 of the magnetic cores 9 are each supported in a positively locking manner in a positioning mount 21 of a cover 3 of the voltage converter 1, analogously to the magnetic core 9 of the voltage converter 1 shown in FIGS.
  • the voltage converter 1 has a holder 11 for each magnetic core 9, which is designed like the holder 11 of the magnetic core 9 of the voltage converter 1 shown in FIGS. 1 and 2 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)

Abstract

The invention relates to a voltage transformer (1). The voltage transformer (1) comprises at least one magnetic core (9) having a winding leg (12) about 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 connect the winding leg (12) and the base leg (13). The voltage transformer (1) further comprises a cover (3), which has, for each magnetic core (9), a positioning mount (21) in which the magnetic core (9) is positioned on the cover (3), and, for each magnetic core (9), a holder (11) having two frame elements (23) which are spaced apart from one another and extend on opposite sides of the magnetic core (9) along the two side legs (14) and the base leg (13) and are each connected to the cover (3).

Description

Beschreibung description

Spannungswandler Voltage converter

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 Spannungswand ler weist dazu in der Regel wenigstens einen in einem metal lischen Kapselungsgehäuse angeordneten Magnetkern auf, um den herum eine Primärwicklung und (wenigstens) eine Sekundärwick lung verlaufen. Die korrekte Anordnung und ausreichende Fi xierung der Aktivteile (Magnetkerne mit Wicklungen) des Span nungswandlers in dem Kapselungsgehäuse sind dabei aus Gründen der Ausprägung des elektrischen Hochspannungsfeldes sehr wichtig, weil eine inkorrekte Anordnung oder ungenügende Fi xierung der Aktivteile zu Beschädigungen bis hin zu Totalaus fällen des Spannungswandlers führen kann. In particular, the invention relates to a voltage converter for a high-voltage switchgear. With such a voltage converter, high AC voltages are proportionally and phase-accurately transformed to lower values for measurement, protection or control purposes. For this purpose, an inductive voltage converter generally 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 fixing of the active parts (magnetic cores with windings) of the voltage converter in the encapsulated housing are very important for reasons of the characteristics of the electrical high-voltage field, because an incorrect arrangement or insufficient fixing of the active parts can lead to damage or even total failure of the Voltage converter can lead.

Der Erfindung liegt die Aufgabe zugrunde, einen Spannungs wandler anzugeben, der insbesondere hinsichtlich der Positio- nierbarkeit seiner Aktivteile und der Anzahl der Bauteile verbessert ist. The invention is based on the object of specifying a voltage converter which is improved, in particular with regard to 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. According to the invention, the object is achieved by a voltage converter having the features of claim 1.

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

Ein erfindungsgemäßer Spannungswandler umfasst - wenigstens einen Magnetkern mit einem Wicklungsschenkel, um den herum Wicklungen des Spannungswandlers angeordnet sind, einem von dem Wicklungsschenkel beabstandeten Basisschenkel und zwei Seitenschenkeln, die jeweils den Wicklungsschenkel und den Basisschenkel miteinander verbinden, A voltage converter according to the invention comprises at least one magnetic core with a winding limb, around which windings of the voltage converter are arranged, a base limb spaced apart from the winding limb and two side legs, which each connect the winding leg and the base leg to one another,

- einen Deckel, der für jeden Magnetkern eine Positionierfas- sung aufweist, in der der Magnetkern an dem Deckel positio niert ist, und a cover which has a positioning socket for each magnetic core, in which the magnetic core is positioned on the cover, and

- für jeden Magnetkern eine Halterung mit zwei voneinander beabstandeten Rahmenelementen, die auf einander gegenüberlie genden Seiten des Magnetkerns jeweils entlang der beiden Sei tenschenkel und des Basisschenkels verlaufen und jeweils mit dem Deckel verbunden sind. - For each magnetic core, a holder with two spaced apart frame elements, which run on opposite sides of the magnetic core along the two side legs and the base leg and are each connected to the cover.

Der Deckel verschließt beispielsweise ein Kapselungsgehäuse des Spannungswandlers. Die Ausformung des Deckels mit einer Positionierfassung für jeden Magnetkern ermöglicht eine ein fache und präzise Positionierung jedes Magnetkerns ohne Posi tionierlehren oder ähnliche Hilfsmittel. Die Halterung eines Magnetkerns mit zwei Rahmenelementen ermöglicht eine mechani sche Fixierung des an einer Positionierfassung gelagerten Magnetkerns zwischen den beiden Rahmenelementen. Durch geeig nete, unten genannte Ausgestaltungen der Halterung kann die Halterung ferner den Magnetkern mit der Halterung verspannen und elektrische Felder ausprägen. Die Erfindung vereinfacht damit die Montage des Spannungswandlers und kann die Anzahl der Bauteile des Spannungswandlers zur Fixierung und Verspan nung der Aktivteile und zur Ausbildung elektrischer Felder auf eine gewünschte Art reduzieren. The cover closes, for example, an encapsulating housing of the voltage converter. The shape of the cover with a positioning socket for each magnetic core enables simple and precise positioning of each magnetic core without positioning gauges or similar aids. The mounting of a magnetic core with two frame elements enables a mechanical specific fixation of the magnetic core mounted on a positioning fixture between the two frame elements. By means of suitable configurations of the holder mentioned below, the holder can also brace the magnetic core with the holder and develop 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 bracing the active parts and for the formation of electrical fields in a desired way.

Bei einer Ausgestaltung der Erfindung weist die Halterung je des Magnetkerns Spannelemente auf, durch die der Magnetkern mit der Halterung verspannt ist. Beispielsweise umfassen die Spannelemente der Halterung jedes Magnetkerns zwei Klemmele mente und eine die beiden Klemmelemente verbindende Spann stange, jedes Klemmelement ist formschlüssig zwischen benach barten Enden der beiden Rahmenelemente der Halterung angeord net und die Spannstange verläuft entlang des Wicklungsschen kels 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 one embodiment of the invention, the holder has clamping elements for each magnetic core, by means of which the magnetic core is clamped to the holder. For example, the clamping elements of the holder of each magnetic core comprise two Klemmele elements and a clamping rod connecting the two clamping elements, each clamping element is positively connected between adjacent ends of the two frame elements of the holder angeord net and the tension rod runs along the winding's angle of the magnetic core. As a result, the mounting of a magnetic core enables the magnetic core to be braced with the mounting by means of clamping elements which are positively connected to the two frame elements and which are pressed against the magnetic core.

Beispielsweise ist jedes Klemmelement der Halterung eines Magnetkerns an einem Übergangsbereich zwischen einem Seiten schenkel und dem Wicklungsschenkel des Magnetkerns angeord net. Dabei weist der Übergangsbereich beispielsweise eine ge bogene Oberfläche auf, an der das Klemmelement anliegt. Dadurch können die Klemmelemente zum Verspannen des Magnet kerns in einfacher Weise an die gebogene Oberfläche des Über gangsbereichs gedrückt werden, indem sie an der Spannstange entlang dieser Oberfläche verschoben werden. Beispielsweise weisen als Schnittbandkerne ausgeführte Magnetkerne Über gangsbereiche zwischen den Seitenschenkeln und dem Wicklungs schenkel mit gebogenen Oberflächen auf und eignen sich daher besonders für diese Ausgestaltung der Erfindung. For example, each clamping element of the holder of a magnetic core is net angeord 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. As a result, the clamping elements for tensioning the magnet core can be pressed in a simple manner against the curved surface of the transition area by being moved along this surface on the tension rod. For example, magnetic cores designed as cut tape cores have transition areas between the side legs and the winding legs with curved surfaces and are therefore particularly suitable for this embodiment of the invention.

Die Spannstange der Halterung jedes Magnetkerns weist bei spielsweise 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 Schrau belements verspannt werden. The clamping rod of the holder of each magnetic core has, for example, at least one end region guided by a clamping element with a thread onto which a screw element is screwed which presses the clamping element against the magnetic core. As a result, a magnetic core with its holder can be braced 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 an geordneten Wicklungen zugewandt ist. Die Schirmung verläuft beispielsweise auf beiden Seiten der um den Magnetkern herum angeordneten Wicklungen teilumfänglich um den Wicklungsschen kel des Magnetkerns und/oder entlang beider Seitenschenkel und/oder entlang des Basisschenkels. Bei diesen Ausgestaltun gen der Erfindung umfasst die Halterung jedes Magnetkerns al so an den Rahmenelementen angeordnete Schirmungen zum Ab schirmen elektrischer Felder, beispielsweise um hohe Feld stärken an Kanten der Rahmenelemente zu vermeiden. Durch die in die Rahmenelemente integrierten Schirmungen können separa- te beziehungsweise zusätzliche Schirmungen vorteilhaft ent fallen oder reduziert werden. In a further embodiment of the invention, each frame element of the holder of each magnetic core has a screen with a surface facing the windings arranged around the magnetic core. The shielding 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 Ausgestaltun conditions of the invention, the holder of each magnetic core al so 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. Thanks to the shields integrated in the frame elements, separate te or additional shielding are advantageously omitted or reduced.

Bei einer weiteren Ausgestaltung der Erfindung ist an der Po sitionierfassung jedes Magnetkerns der Basisschenkel des Mag netkerns 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 platzspa rende Ausführung des Spannungswandlers, bei der die Wicklun gen des Spannungswandlers im Wesentlichen in zu dem Deckel orthogonalen Ebenen verlaufen. In a further embodiment of the invention, the base leg of the 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 mount 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 Rah menelement lösbar, beispielsweise durch wenigstens eine Schraubverbindung, mit dem Deckel verbunden. Dadurch können die Rahmenelemente der Halterung eines Magnetkerns in einfa cher 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. As a result, the frame elements of the holder of a magnetic core can be mounted on the cover in a simple manner 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 Spannungswand lers für dreiphasige Wechselspannungen. In a further embodiment of the invention, the voltage converter has three magnetic cores. For example, the winding legs of the magnet cores are arranged in a star shape at an angle of 120 degrees to one another. This enables in particular an expedient 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 Zusam menhang mit der folgenden Beschreibung von Ausführungsbei spielen, die im Zusammenhang mit den Zeichnungen näher erläu tert werden. Dabei zeigen: The properties, features and advantages of this invention described above and the manner in which they are achieved will be more clearly understood in connection with the following description of exemplary embodiments, which are tert erläu in connection with the drawings. Show:

FIG 1 eine perspektivische Darstellung eines ersten Aus führungsbeispiels eines Spannungswandlers, FIG 2 eine perspektivische Darstellung des in Figur 1 ge zeigten Spannungswandlers im Bereich einer Positio nierfassung, 1 shows a perspective illustration of a first exemplary embodiment from a voltage converter, FIG. 2 shows a perspective view of the voltage converter shown in FIG. 1 in the area of a positioning detection,

FIG 3 eine perspektivische Darstellung eines zweiten Aus führungsbeispiels eines Spannungswandlers. 3 shows a perspective illustration of a second exemplary embodiment from a voltage converter.

Einander entsprechende Teile sind in den Figuren mit densel ben 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 aus gelegt. Der Spannungswandler 1 umfasst einen Deckel 3, eine Primärwicklung 5, eine Sekundärwicklung, eine Elektrode 7, einen Magnetkern 9 und eine Halterung 11 für den Magnet kern 9. FIG. 1 (FIG. 1) shows a perspective illustration of a first exemplary 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 Kapselungs gehäuse, in dem die Primärwicklung 5, die Sekundärwicklung, die Elektrode 7, der Magnetkern 9 und die Halterung 11 ange ordnet sind. The cover 3 closes an encapsulation 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 angeord net sind, einen von dem Wicklungsschenkel 12 beabstandeten und parallel zu dem Wicklungsschenkel 12 verlaufenden Ba sisschenkel 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 Se kundärwicklung 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 Pri märwicklung 5 herum angeordnet ist. The magnetic core 9 comprises a winding limb 12 around which the primary winding 5 and the secondary winding are arranged, a base limb 13 spaced from the winding limb 12 and running parallel to the winding limb 12, and two side limbs 14, each of which is the winding limb 12 and the base limb 13 connect to one another and run perpendicular to the winding leg 12 and the base leg 13. The magnetic core 9 is designed as a cut tape core. The transition area 16 between a side leg 14 and the winding leg 12 and the transition area 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 cannot be seen in FIG. One end of the primary winding 5 is with the Electrode 7 connected, which is arranged around a central portion of the primary winding 5 around.

Der Deckel 3 weist eine Positioniertassung 21 auf, die dazu eingerichtet ist, den Magnetkern 9 an dem Deckel 3 zu positi onieren. An der Positioniertassung 21 ist der Basisschen kel 13 des Magnetkerns 9 formschlüssig gelagert. The cover 3 has a positioning socket 21 which is designed to position the magnetic core 9 on the cover 3. On the positioning socket 21 of the base leg 13 of the magnetic core 9 is mounted in a form-fitting manner.

Figur 2 (FIG 2) zeigt einen Ausschnitt des in Figur 1 gezeig ten Spannungswandlers 1 im Bereich der Positioniertassung 21 in einer perspektivischen Darstellung. FIG. 2 (FIG. 2) shows a section of the voltage converter 1 shown in FIG. 1 in the area of the positioning socket 21 in a perspective illustration.

Die Halterung 11 umfasst zwei Rahmenelemente 23, zwei Klemm elemente 25, eine Spannstange 27 und zwei Schraubelemente 29. The holder 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 Basisschen kels 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 ver bunden. Ferner weist jedes Rahmenelement 23 eine Schirmung 33 mit einer gewölbten Oberfläche auf, die den um den Magnet kern 9 herum angeordneten Wicklungen (Primärwicklung 5, Se kundärwicklung) zugewandt ist. Die Schirmung 33 verläuft auf beiden Seiten der Wicklungen teilumfänglich um den Wicklungs schenkel 12 sowie entlang beider Seitenschenkel 14 und des Basisschenkels 13, wobei die Schirmungen 33 der beiden Rah menelemente 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 Kernfens ter 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 shape. Each frame element 23 is releasably connected to the cover 3 by a screw connection 31 a related party. Furthermore, each frame element 23 has a shield 33 with a curved surface which faces the windings arranged around the magnet core 9 (primary winding 5, secondary winding). The shield 33 runs on both sides of the windings partially around the winding leg 12 and along both side legs 14 and the base leg 13, 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 area of the winding legs 12 are spaced apart 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 Übergangsbe reich 16 zwischen einem Seitenschenkel 14 und dem Wicklungs- Schenkel 12 des Magnetkerns 9 angeordnet. Die Spannstange 27 verbindet die beiden Klemmelemente 25 miteinander und ver läuft 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 ge schraubt ist, das das Klemmelement 25 an die gebogene Ober fläche 19 des Übergangsbereichs 16 zwischen einem Seiten schenkel 14 und dem Wicklungsschenkel 12 drückt. Each clamping element 25 is form-fitting between adjacent ends of the two frame elements 23 at a transition area 16 between a side leg 14 and the winding Leg 12 of the magnetic core 9 is arranged. The tension rod 27 connects the two clamping elements 25 together and ver runs along the winding leg 12. Each end region of the tension rod 27 is guided through a clamping element 33 and has a thread on which a screw element 29 is screwed, the clamping element 25 to the curved Upper surface 19 of the transition region 16 between a side leg 14 and the winding leg 12 presses.

Figur 3 (FIG 3) zeigt eine perspektivische Darstellung eines zweiten Ausführungsbeispiels eines Spannungswandlers 1. Der Spannungswandler 1 ist für dreiphasige Wechselspannungen aus gelegt. Der Spannungswandler 1 weist daher drei Magnetkerne 9 auf, um die herum jeweils eine Primärwicklung 5 und eine Se kundärwicklung angeordnet sind. Jeder Magnetkern 9 ist wie der Magnetkern 9 des in den Figuren 1 und 2 gezeigten Span nungswandlers 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 Mag netkern 9 eine Halterung 11 auf, die wie die Halterung 11 des Magnetkerns 9 des in den Figuren 1 und 2 gezeigten Spannungs wandlers 1 ausgebildet und mit einer Schraubverbindung 31 an dem Deckel 3 befestigt ist. FIG. 3 (FIG. 3) shows a perspective illustration of a second exemplary 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 designed like the magnetic core 9 of the voltage converter 1 shown in FIGS. The winding legs 12 of the magnetic cores 9 are arranged in a star shape at an angle of 120 degrees to one another. The base legs 13 of the magnetic cores 9 are each supported in a positively locking manner in a positioning mount 21 of a cover 3 of the voltage converter 1, analogously to the magnetic core 9 of the voltage converter 1 shown in FIGS. Furthermore, the voltage converter 1 has a holder 11 for each magnetic core 9, which is designed like the holder 11 of the magnetic core 9 of the voltage converter 1 shown in FIGS. 1 and 2 and is fastened to the cover 3 with a screw connection 31.

Obwohl die Erfindung im Detail durch bevorzugte Ausführungs beispiele 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 Erfindung zu verlassen. Although the invention has been illustrated and described in more detail by preferred embodiment examples, the invention is not restricted by the disclosed examples and other variations can be derived therefrom by the person skilled in the art without departing from the scope of the invention.

Claims

Patentansprüche Claims 1. Spannungswandler (1), umfassend 1. Voltage converter (1), comprising - wenigstens einen Magnetkern (9) mit einem Wicklungsschen kel (12), um den herum Wicklungen des Spannungswandlers (1) angeordnet sind, einem von dem Wicklungsschenkel (12) beab- standeten Basisschenkel (13) und zwei Seitenschenkeln (14), die jeweils den Wicklungsschenkel (12) und den Basisschen kel (13) miteinander verbinden, - At least one magnetic core (9) with a winding leg (12) around which windings of the voltage converter (1) are arranged, a base leg (13) spaced apart from the winding leg (12) and two side legs (14), each of which connect the winding leg (12) and the base leg (13) to one another, - einen Deckel (3), der für jeden Magnetkern (9) eine Positi onierfassung (21) aufweist, in der der Magnetkern (9) an dem Deckel (3) positioniert ist, und - A cover (3), which for each magnetic core (9) has a posi onation (21) in which the magnetic core (9) is positioned on the cover (3), and - für jeden Magnetkern (9) eine Halterung (11) mit zwei von einander beabstandeten Rahmenelementen (23), die auf einander gegenüberliegenden Seiten des Magnetkerns (9) jeweils entlang der beiden Seitenschenkel (14) und des Basisschenkels (13) verlaufen und jeweils mit dem Deckel (3) verbunden sind. - For each magnetic core (9) a holder (11) with two spaced apart frame elements (23) which run on opposite sides of the magnetic core (9) along the two side legs (14) and the base leg (13) and each with the cover (3) are connected. 2. Spannungswandler (1) nach Anspruch 1, wobei die Halte rung (11) jedes Magnetkerns (9) Spannelemente (25, 27) auf weist, durch die der Magnetkern (9) mit der Halterung (11) verspannt ist. 2. Voltage converter (1) according to claim 1, wherein the holding tion (11) of each magnetic core (9) has clamping elements (25, 27) through which the magnetic core (9) is clamped to the holder (11). 3. Spannungswandler (1) nach Anspruch 2, wobei die Spannele mente (25, 27) der Halterung (11) jedes Magnetkerns (9) zwei Klemmelemente (25) und eine die beiden Klemmelemente (25) verbindende Spannstange (27) umfassen, jedes Klemmele ment (25) formschlüssig zwischen benachbarten Enden der bei den Rahmenelemente (23) der Halterung (11) angeordnet ist und die Spannstange (27) entlang des Wicklungsschenkels (12) des Magnetkerns (9) verläuft. 3. Voltage converter (1) according to claim 2, wherein the Spannele elements (25, 27) of the holder (11) of each magnetic core (9) two clamping elements (25) and a clamping rod (27) connecting the two clamping elements (25), each Klemmele element (25) form-fitting between adjacent ends of the frame elements (23) of the bracket (11) is arranged and the tension rod (27) runs along the winding leg (12) of the magnet core (9). 4. Spannungswandler (1) nach Anspruch 3, wobei jedes Klemm element (25) an einem Übergangsbereich (16) zwischen einem Seitenschenkel (14) und dem Wicklungsschenkel (12) des Mag netkerns (9) angeordnet ist. 4. Voltage converter (1) according to claim 3, wherein each clamping element (25) is arranged at a transition region (16) between a side leg (14) and the winding leg (12) of the Mag net core (9). 5. Spannungswandler (1) nach Anspruch 4, wobei der Übergangs bereich (16) eine gebogene Oberfläche (19) aufweist, an der das Klemmelement (25) anliegt. 5. Voltage converter (1) according to claim 4, wherein the transition region (16) has a curved surface (19) on which the clamping element (25) rests. 6. Spannungswandler (1) nach einem der Ansprüche 3 bis 5, wo bei die Spannstange (27) der Halterung (11) jedes Magnet kerns (9) wenigstens einen durch ein Klemmelement (25) ge führten Endbereich mit einem Gewinde aufweist, auf das ein Schraubelement (29) geschraubt ist, das das Klemmelement (25) an den Magnetkern (9) drückt. 6. Voltage converter (1) according to one of claims 3 to 5, where in the tension rod (27) of the holder (11) of each magnet core (9) has at least one through a clamping element (25) GE led end region with a thread on the a screw element (29) is screwed, which presses the clamping element (25) against the magnetic core (9). 7. Spannungswandler (1) nach einem der vorhergehenden Ansprü che, wobei jedes Rahmenelement (23) der Halterung (11) jedes Magnetkerns (9) eine Schirmung (33) mit einer Oberfläche auf weist, die den um den Magnetkern (9) herum angeordneten Wick lungen zugewandt ist. 7. Voltage converter (1) according to one of the preceding Ansprü surface, wherein each frame element (23) of the holder (11) of each magnetic core (9) has a shield (33) with a surface which is arranged around the magnetic core (9) Wick lungs is facing. 8. Spannungswandler (1) nach Anspruch 7, wobei die Schir mung (33) auf beiden Seiten der um den Magnetkern (9) herum angeordneten Wicklungen teilumfänglich um den Wicklungsschen kel (12) des Magnetkerns (9) verläuft. 8. Voltage converter (1) according to claim 7, wherein the shielding (33) extends on both sides of the windings arranged around the magnetic core (9) around the circumference of the winding's angle (12) of the magnetic core (9). 9. Spannungswandler (1) nach Anspruch 7 oder 8, wobei die Schirmung (33) entlang beider Seitenschenkel (14) des Magnet kerns (9) verläuft. 9. Voltage converter (1) according to claim 7 or 8, wherein the shield (33) runs along both side legs (14) of the magnet core (9). 10. Spannungswandler (1) nach einem der Ansprüche 7 bis 9, wobei die Schirmung (33) entlang des Basisschenkels (13) des Magnetkerns (9) verläuft. 10. Voltage converter (1) according to one of claims 7 to 9, wherein the shield (33) runs along the base leg (13) of the magnetic core (9). 11. Spannungswandler (1) nach einem der vorhergehenden An sprüche, wobei an der Positioniertassung (21) jedes Magnet kerns (9) der Basisschenkel (13) des Magnetkerns (9) form schlüssig gelagert ist. 11. Voltage converter (1) according to one of the preceding claims, wherein on the positioning socket (21) of each magnet core (9) of the base leg (13) of the magnet core (9) is positively mounted. 12. Spannungswandler (1) nach einem der vorhergehenden An sprüche, wobei jedes Rahmenelement (23) lösbar mit dem De ckel (3) verbunden ist. 12. Voltage converter (1) according to one of the preceding claims, wherein each frame element (23) is detachably connected to the cover (3). 13. Spannungswandler (1) nach einem der vorhergehenden An sprüche, wobei jedes Rahmenelement (23) durch wenigstens eine Schraubverbindung (31) mit dem Deckel (3) verbunden ist. 13. Voltage converter (1) according to one of the preceding claims, wherein each frame element (23) is connected to the cover (3) by at least one screw connection (31). 14. Spannungswandler (1) nach einem der vorhergehenden An sprüche mit drei Magnetkernen (9). 14. Voltage converter (1) according to one of the preceding claims with three magnetic cores (9). 15. Spannungswandler (1) nach Anspruch 14, wobei die Wick- lungsschenkel (12) der Magnetkerne (9) sternförmig in einem15. Voltage converter (1) according to claim 14, wherein the winding legs (12) of the magnetic cores (9) are star-shaped in one Winkel von 120 Grad zueinander angeordnet sind. Angle of 120 degrees to each other are arranged.
PCT/EP2020/088028 2020-01-30 2020-12-30 Voltage transformer Ceased WO2021151614A1 (en)

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EP20839129.2A EP4078631B1 (en) 2020-01-30 2020-12-30 Voltage transformer
KR1020227029427A KR102745265B1 (en) 2020-01-30 2020-12-30 Transformer
JP2022545155A JP7439272B2 (en) 2020-01-30 2020-12-30 instrument transformer
CN202080095301.0A CN115151986A (en) 2020-01-30 2020-12-30 Voltage converter

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DE102020201100.1A DE102020201100A1 (en) 2020-01-30 2020-01-30 Voltage converter
DE102020201100.1 2020-01-30

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CN116825503A (en) * 2023-04-10 2023-09-29 山东泰开互感器有限公司 An electromagnetic voltage transformer body for GIS and its manufacturing method

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JP2023514507A (en) 2023-04-06
KR20220129075A (en) 2022-09-22
EP4078631B1 (en) 2025-05-21
JP7439272B2 (en) 2024-02-27
EP4078631A1 (en) 2022-10-26
CN115151986A (en) 2022-10-04
DE102020201100A1 (en) 2021-08-05

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