DE19534560A1 - Toroidal core current transformer esp. for three=phase current transformer design - Google Patents
Toroidal core current transformer esp. for three=phase current transformer designInfo
- Publication number
- DE19534560A1 DE19534560A1 DE1995134560 DE19534560A DE19534560A1 DE 19534560 A1 DE19534560 A1 DE 19534560A1 DE 1995134560 DE1995134560 DE 1995134560 DE 19534560 A DE19534560 A DE 19534560A DE 19534560 A1 DE19534560 A1 DE 19534560A1
- Authority
- DE
- Germany
- Prior art keywords
- current transformer
- toroidal
- core
- secondary winding
- toroidal 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 25
- 230000004907 flux Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000080575 Oxalis tetraphylla Species 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/16—Toroidal transformers
-
- 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
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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
- H01F38/38—Instruments transformers for polyphase AC
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Ringkern-Stromwandler, der einen Ringkern, eine durch die Kernöffnung geführte Primärwicklung und eine um den Ringkern gewundene Sekundär wicklung aufweist.The invention relates to a toroidal current transformer, one ring core, one through the core opening Primary winding and a secondary wound around the toroid has winding.
Gattungsgemäße Ringkern-Stromwandler gehören seit langem zum Stand der Technik. Aufgrund vorgegebener Geräteabmessungen ist der Einsatz solcher technisch hochwertiger und für be stimmte Anwendungen kostengünstiger Ringkerne wegen ihrer gleichmäßig runden Bewicklung nicht möglich. Insbesondere bei dreiphasigen Stromwandlern sind die Außenabmessungen, die Größe und Lage der Stromschienen festgelegt, was aufwendige, schwere und zugleich teure Sonderwandler erfordert. Kleine, leichte und dadurch günstige Ringkernwandler können dagegen wegen ihrer Ringform nicht immer eingesetzt werden.Generic toroidal current transformers have long been part of State of the art. Due to given device dimensions is the use of such technically high quality and for be agreed applications of inexpensive toroids because of their even round wrapping not possible. Especially at three-phase current transformers are the external dimensions that Size and location of the busbars, which is expensive, requires heavy and expensive special converters. Little one light and therefore inexpensive toroidal converters, however, can not always used because of their ring shape.
Der Erfindung liegt die Aufgabe zugrunde, einen Ringkern- Stromwandler der oben genannten Art zu schaffen, der in seiner äußeren Form dem vorgegebenen Einbauraum, z. B. in einem Gerät, anpaßbar ist.The invention has for its object to provide a toroid To create current transformers of the type mentioned above, which in its outer shape the specified installation space, for. B. in a device that is customizable.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß der Ringkern mit der Sekundärwicklung unrund bewickelt ist.According to the invention the object is achieved in that the Toroidal core is wound out of round with the secondary winding.
Vorteilhafte Weiterbildungen der Erfindung lassen sich den Unteransprüchen entnehmen.Advantageous developments of the invention can be Take sub-claims.
Es ist besonders vorteilhaft, wenn die Primärwicklung als Stromschiene ausgeführt ist, da deren Breite sich der Kern öffnung gut anpassen läßt, wobei zu beiden Seiten der Strom schiene sich halbkreisförmige Sektoren für die Bewicklung des Ringkerns mit der Primärwicklung ergeben. It is particularly advantageous if the primary winding as Busbar is designed because its width is the core opening can be adjusted well, with the current on both sides would appear semi-circular sectors for winding the Toroid with the primary winding.
Ist der Ringkern mit der Sekundärwicklung an nur zwei gegen überliegenden Seiten bewickelt, so ergibt sich eine besonders schmale Bauform für den Ringkern-Stromwandler, dessen Breite durch die Abmessungen des Ringkerns bestimmt ist.Is the toroid with the secondary winding against only two wrapped overlying pages, there is a special narrow design for the toroidal current transformer, its width is determined by the dimensions of the toroid.
Weiterhin ist es vorteilhaft, wenn die äußere Kontur der Sekundärwicklung ovalförmig ist, da diese in einem Einbauraum dessen Querschnitt rechteckförmig ist, eine optimale Nutzung der Einbauverhältnisse darstellt.Furthermore, it is advantageous if the outer contour of the Secondary winding is oval in shape since it is in an installation space whose cross section is rectangular, an optimal use represents the installation conditions.
Außerdem erweist es sich als zweckmäßig, wenn der Ringkern- Stromwandler mit zwei weiteren, in gleicher Weise aufgebauten Ringkern-Stromwandlern zu einer dreiphasigen Einheit aufge baut ist, da auch hier unter optimaler Nutzung vorgegebener Raumabmessungen sich noch kostengünstig eine dreiphasige Stromwandlung realisieren läßt.It also proves useful if the toroid Current transformer with two further, constructed in the same way Toroidal current transformers added to a three-phase unit is built, as here too, with optimal use of predetermined Room dimensions are still a three-phase Current conversion can be realized.
Eine optimierte Anordnung erhält man, wenn die Ebenen, in denen zumindest zwei Ringkern-Stromwandler angeordnet sind, gegeneinander versetzt sind und die Fluchtlinien ihrer Ring kerne sich schneiden.An optimized arrangement is obtained when the levels are in which have at least two toroidal current transformers arranged, are offset from each other and the escape lines of their ring cores intersect.
Ein Ausführungsbeispiel der Erfindung wird im folgenden an hand einer Zeichnung näher erläutert.An embodiment of the invention will follow hand explained in more detail a drawing.
In der Zeichnung sind drei, eine dreiphasige Einheit bildende Ringkern-Stromwandler 1 in einem Gehäuse 2 dargestellt. Jeder Ringkern-Stromwandler 1 umfaßt einen ferromagnetischen Ring kern 3, durch dessen Kernöffnung jeweils eine als Stromschie ne 4 ausgeführte Primärwicklung hindurchgeführt ist, sowie eine um den Ringkern 3 gewundene Sekundärwicklung 5. Im vor liegenden Fall ist der Ringkern 3 jeweils mit der zugehörigen Sekundärwicklung 5 derart bewickelt, daß sich eine ovale äußere Form ergibt. Allgemein sind durch die unrunde Bewick lung auch andere Formen denkbar. Die Breite und Höhe der Bewicklung kann dabei stets dem vorhandenen Einbauraum ange paßt werden. Die minimale Baubreite ist, wie in der Zeichnung dargestellt, durch die Abmessungen des Ringkerns 3 gegeben.In the drawing, three toroidal current transformers 1 forming a three-phase unit are shown in a housing 2 . Each ring core current transformer 1 comprising a ferromagnetic toroidal core 3, a primary winding 4 performed ne as a current slide is guided through the core opening, respectively, and a winding around the toroidal core 3 secondary winding. 5 In the present case, the toroidal core 3 is wound with the associated secondary winding 5 in such a way that there is an oval outer shape. In general, other shapes are also conceivable due to the non-circular winding. The width and height of the wrapping can always be fitted to the existing installation space. The minimum overall width, as shown in the drawing, is given by the dimensions of the ring core 3 .
Bei der vorliegenden dreiphasigen Ausführung sind die Strom schienen 4 parallel nebeneinander in einer gemeinsamen Ebene geführt. Der in der Mitte angeordnete Ringkern-Stromwandler 1 liegt versetzt zu den beiden äußeren Ringkern-Stromwandlern 1, wobei die Fluchtlinien des mittleren Ringkerns 3 zumindest teilweise die Fluchtlinien der äußeren Ringkerne 3 schneiden, d. h. die beiden äußeren Ringkerne sind bei entsprechender Draufsicht durch den mittleren Ringkern teilweise abgedeckt. Auf diese Weise wird der beschränkt verfügbare Raum zwischen den Stromschienen 4 für die Ringkerne 3 optimal ausgenutzt.In the present three-phase version, the busbars 4 are guided in parallel side by side in a common plane. The toroidal current transformer 1 arranged in the middle is offset from the two outer toroidal current transformers 1 , the alignment lines of the central toroidal core 3 at least partially intersecting the alignment lines of the outer toroidal cores 3 , ie the two outer toroidal cores are through the central toroidal core when viewed from above partially covered. In this way, the limited space between the busbars 4 for the toroidal cores 3 is optimally used.
Die erfindungsgemäßen Ringkern-Stromwandler 1 ermöglichen unter Ausnutzung der Ringkerntechnik mit geringem Eisenquer schnitt das Verhältnis von Breite der Stromschiene 4 zur Breite des Gehäuses 2 optimal zu wählen. Der Einsatz von Eisen und Kupfer ist minimal, so daß sich auch ein kosten ogünstiger Stromwandler ergibt.The toroidal current transformers 1 according to the invention enable the ratio of the width of the busbar 4 to the width of the housing 2 to be optimally selected using the toroidal technology with a small iron cross section. The use of iron and copper is minimal, so that there is also an inexpensive current transformer.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995134560 DE19534560C2 (en) | 1995-09-18 | 1995-09-18 | Toroidal current transformer |
| FR9611251A FR2738950A1 (en) | 1995-09-18 | 1996-09-16 | CURRENT TRANSFORMER WITH ANNULAR CORE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995134560 DE19534560C2 (en) | 1995-09-18 | 1995-09-18 | Toroidal current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE19534560A1 true DE19534560A1 (en) | 1997-03-20 |
| DE19534560C2 DE19534560C2 (en) | 1999-09-02 |
Family
ID=7772468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1995134560 Expired - Fee Related DE19534560C2 (en) | 1995-09-18 | 1995-09-18 | Toroidal current transformer |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19534560C2 (en) |
| FR (1) | FR2738950A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009000622A2 (en) * | 2007-06-25 | 2008-12-31 | Siemens Aktiengesellschaft | Measuring transducer arrangement with multiple secondary circuits |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1965820U (en) * | 1967-04-01 | 1967-08-10 | Purrmann & Herr G M B H | CONVERTER. |
| DE2228651B1 (en) * | 1972-06-13 | 1973-12-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | RING COIL |
| EP0558428A1 (en) * | 1992-02-24 | 1993-09-01 | Schneider Electric Sa | Toroidal transformer for class A differential sensor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE976708C (en) * | 1950-01-20 | 1964-03-12 | Hans Ritz Dr Ing | Low-voltage current transformer for installation in switchgear |
| FR1096761A (en) * | 1953-02-25 | 1955-06-24 | Reyrolle A & Co Ltd | Improvements to assemblies constituting transformers for high voltage switchgear |
-
1995
- 1995-09-18 DE DE1995134560 patent/DE19534560C2/en not_active Expired - Fee Related
-
1996
- 1996-09-16 FR FR9611251A patent/FR2738950A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1965820U (en) * | 1967-04-01 | 1967-08-10 | Purrmann & Herr G M B H | CONVERTER. |
| DE2228651B1 (en) * | 1972-06-13 | 1973-12-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | RING COIL |
| EP0558428A1 (en) * | 1992-02-24 | 1993-09-01 | Schneider Electric Sa | Toroidal transformer for class A differential sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009000622A2 (en) * | 2007-06-25 | 2008-12-31 | Siemens Aktiengesellschaft | Measuring transducer arrangement with multiple secondary circuits |
| WO2009000622A3 (en) * | 2007-06-25 | 2009-02-19 | Siemens Ag | Measuring transducer arrangement with multiple secondary circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2738950A1 (en) | 1997-03-21 |
| DE19534560C2 (en) | 1999-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |