DE459189C - Compensated current transformer - Google Patents
Compensated current transformerInfo
- Publication number
- DE459189C DE459189C DEP47434D DEP0047434D DE459189C DE 459189 C DE459189 C DE 459189C DE P47434 D DEP47434 D DE P47434D DE P0047434 D DEP0047434 D DE P0047434D DE 459189 C DE459189 C DE 459189C
- Authority
- DE
- Germany
- Prior art keywords
- current transformer
- compensated current
- capacitor
- compensated
- influenced
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000005415 magnetization Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000010363 phase shift Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Description
"Kompensierter Stromwandler Es ist bereits bei Stromwandlern bekannt, durch einen an die Sekundärwicklung angeschlossenen Kondensator oder durch Anordnung einer dritten Wicklung und eines Kondensators oder durch Anwendung eines besonderen Hilfstransformators zwischen Stromwandler und Kondensator die Abweichungen von der gewünschten Proportionalität zwischen Feld und dem zu messenden Strom zu beseitigen."Compensated current transformer It is already known for current transformers by a capacitor connected to the secondary winding or by arrangement a third winding and a capacitor or by applying a special one Auxiliary transformer between the current transformer and capacitor the deviations from the to eliminate the desired proportionality between the field and the current to be measured.
Vorliegender Erfindung liegt der Gedanke zugrunde, diesen Fehler dadurch zu beseitigen, daß nicht erst das Feld, sondern schon der Magnetisierungsstrom entsprechend beeinflußtwird.The present invention is based on the idea of eliminating this error to eliminate that not only the field, but already the magnetizing current accordingly being affected.
Erreicht wird dies durch die Anbringung eines magnetisch gesättigten Eisensteges mit dazu parallelem Luftweg im magnetischen Kreis des Stromwandlers, wodurch die Proportionalität zwischen Magnetisierungskomponente und Induktion erreicht wird. Die dadurch -vergrößerte Magnetisierungskomponente wird durch den Ladestrom eines Kondensators kompensiert.This is achieved by attaching a magnetically saturated Iron web with parallel air path in the magnetic circuit of the current transformer, whereby the proportionality between magnetization component and induction is achieved will. The magnetization component increased as a result is caused by the charging current compensated by a capacitor.
Die Kondensatoren können je nach Bedarf entweder an die Sekundärwicklung, die Primärwicklung oder an eigens zu diesem oder gleichzeitig auch zu anderen Zwecken angebrachte Hilfswicklungen angeschlossen werden. Die zu erfüllende Forderung ist, daß die Ladestromkomponente möglichst genau gleich und entgegengesetzt gerichtet zur Magnetisierungskomponente ist. Ist dies der Fall, so werden sowohl die Abweichungen in der Übersetzung als auch die Winkelabweichung auf ihren kleinsten Wert reduziert.The capacitors can either be connected to the secondary winding, the primary winding or on specifically for this or at the same time for other purposes attached auxiliary windings are connected. The requirement to be fulfilled is that the charging current component is directed as exactly as possible and in the opposite direction to the magnetization component. If this is the case, both the deviations in the translation as well as the angular deviation is reduced to its smallest value.
Die Abb. i, 2 und 3 stellen drei Ausführungsbeispiele von kompensierten Stromwandlern dar. Durch Anbringung eines gesättigten Eisensteges s und eines Luftweges z parallel zu diesem, ist es möglich, das Verhältnis der Magnetisierungsamperewindungen w, i zur Induktion B, wie es durch die Kurve a (Abb. 4) bei reinem Eisenweg gegeben ist, auf die angenäherte Gerade b durch den Anfang zu bringen, d. h. die Proportionalität herzustellen. Die Magnetisierungskomponente i" (Abb. 5), die absolut größer wird, kann nun durch eine entgegengesetzt wirkende Ladestromkomponente i, mehr oder weniger genau kompensiert werden. Zur Erzeugung dieser Komponente kann der Kondensator nach Abb. i an die Sekundärklemmen gelegt oder bei der Ausführungsart nach Abb. 2 an die Ausgleichswicklungen angeschlossen oder endlich durch eine separate Hilfswicklung W, gespeist werden (Abb.3).Fig. I, 2 and 3 show three embodiments of compensated current transformers. By attaching a saturated iron web s and an air path z parallel to this, it is possible to determine the ratio of the magnetization ampere turns w, i to the induction B, as shown by the curve a (Fig. 4) is given in the case of a pure iron route, to bring the approximate straight line b through the beginning, ie to establish the proportionality. The magnetization component i "(Fig. 5), which becomes absolutely larger, can now be compensated more or less precisely by an opposing charging current component i connected to the equalizing windings according to Fig. 2 or finally fed by a separate auxiliary winding W (Fig. 3).
Durch geeignete Anordnung dieser Hilfswicklung kann eine günstige Beeinflussung durch Primär- oder Sekundärstrom erzielt werden.With a suitable arrangement of this auxiliary winding, a favorable Can be influenced by primary or secondary current.
Die dargestellten Anordnungen sind Ausführungsbeispiele, die beliebig abgeändert werden können.The arrangements shown are exemplary embodiments that are arbitrary can be modified.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP47434D DE459189C (en) | Compensated current transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP47434D DE459189C (en) | Compensated current transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
DE459189C true DE459189C (en) | 1929-10-25 |
Family
ID=7382387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP47434D Expired DE459189C (en) | Compensated current transformer |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE459189C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE752154C (en) * | 1938-04-05 | 1953-04-27 | Aeg | Rod core current transformer |
DE898608C (en) * | 1938-04-06 | 1953-12-03 | Aeg | Rod core current transformer |
DE977148C (en) * | 1954-06-16 | 1965-05-06 | Messwandler Bau Gmbh | Circuit arrangement for error and incorrect angle adjustment on voltage converters designed with several primary taps |
-
0
- DE DEP47434D patent/DE459189C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE752154C (en) * | 1938-04-05 | 1953-04-27 | Aeg | Rod core current transformer |
DE898608C (en) * | 1938-04-06 | 1953-12-03 | Aeg | Rod core current transformer |
DE977148C (en) * | 1954-06-16 | 1965-05-06 | Messwandler Bau Gmbh | Circuit arrangement for error and incorrect angle adjustment on voltage converters designed with several primary taps |
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