DE1253357B - Choke coil to limit the current between the tapping contacts of step transformers - Google Patents
Choke coil to limit the current between the tapping contacts of step transformersInfo
- Publication number
- DE1253357B DE1253357B DE1961M0048265 DEM0048265A DE1253357B DE 1253357 B DE1253357 B DE 1253357B DE 1961M0048265 DE1961M0048265 DE 1961M0048265 DE M0048265 A DEM0048265 A DE M0048265A DE 1253357 B DE1253357 B DE 1253357B
- Authority
- DE
- Germany
- Prior art keywords
- coils
- connections
- current
- coil
- transformer
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Description
DEUTSCHES GERMAN JfflTWp JfflTWp PATENTAMTPATENT OFFICE
AUSLEGESCHRIFT HOlh EXPLAINING LETTER HOlh
DeutscheKl.: 21 d2-53/03 German class: 21 d2- 53/03
Nummer: 1 253 357Number: 1 253 357
Aktenzeichen: M 48265 VIII b/21 d2File number: M 48265 VIII b / 21 d2
1 253 357 Anmeldetag: 3.März 19611 253 357 filing date: March 3, 1961
Auslegetag: 2. November 1967Open date: November 2, 1967
In üblicher Weise wird die Begrenzung des Stroms zwischen zwei Anzapfkontakten während der Stufenänderung mit Hilfe von Drosseln oder Widerständen durchgeführt. Die Drosseln sind jedoch verhältnismäßig kostspielig, und die Widerstände verlangen eine sehr schnelle Umschaltung, was zu Schwierigkeiten führt. Die bekannten Drosseln bestehen aus zwei parallelgeschalteten Spulen, wovon je eine auf den beiden Seitensäulen eines mantelförmigen Einphasenkerns montiert ist. Auf der Hauptsäule befindet sich die Transformatorenspule. Die Drosselspulen werden nur während des Überganges von einer Stufe zur anderen benutzt, was zu einer geringeren Ausnutzung der Spule führt. Die Benutzung zweier gleichartiger Spulen in der Wicklung des Transformators selbst als Begrenzungsdrossel ist bekannt, wobei diese Spulen auf der gleichen Säule zusammen mit der Wicklung der parallelgeschalteten Phase montiert sind. In diesem Fall ist jedoch die verwirklichte Reaktanz verhältnismäßig gering, aus welchem Grund die Verwendung dieser Drosselschaltung wenig Verbreitung gefunden hat.In the usual way, the limitation of the current between two taps is made during the step change carried out with the help of chokes or resistors. However, the chokes are proportionate expensive, and the resistors require very fast switching, causing difficulties leads. The known chokes consist of two coils connected in parallel, one of which is on the is mounted on both side columns of a jacket-shaped single-phase core. On the main pillar is the transformer coil. The reactors are only activated during the transition from one stage to another used, which leads to a lower utilization of the coil. The use of two similar Coils in the winding of the transformer itself as a limiting inductor is known, this being the case Coils mounted on the same column along with the winding of the parallel phase are. In this case, however, the realized reactance is relatively low, for whatever reason the use of this choke circuit has not found widespread use.
Bekannt ist eine Drosselspule zur Begrenzung der Stromstärke zwischen den Anzapfkontakten von
Stufentransformatoren während der Lastumschaltung, bestehend aus zwei auf dem magnetischen Kern des
Transformators aufgebrachten und jeweils etwa die Hälfte des magnetischen Hauptflusses des Transformators
umfassenden Spulen, die jeweils mit einem Ende an einem von zwei beweglichen Stufenwählerkontakten
angeschlossen sind. Bei dieser bekannten Anordnung sind die beiden Spulen in Reihe geschaltet,
und der Potentialunterschied an den Enden der Spulenreihe ist dem Potentialunterschied zwischen
zwei aufeinanderfolgenden Stufen der Reglerwicklung gleich. Die beiden Spulen sind an zwei
verschiedene Kontakte angeschlossen, so daß die Strombegrenzung zwischen den Reglerkontakten
durch die Gegenspannung erfolgt, die in den beiden in Serie geschalteten Spulen vorhanden ist. In diesem
Fall verbleibt der Fluß in den beiden Kernhälften im Gleichgewicht. Hierbei können die Enden des
reihengeschalteten Spulensystems nicht an derselben Kontaktstelle der Reglerwicklung anliegen, da
dies einen Kurzschluß hervorrufen würde. Die Windungszahl der in Reihe geschalteten Spulen zur Erzielung
einer der Spannung zwischen zwei Regelstufen gleichen elektromotorischen Kraft richtig zu
bestimmen, daß der Kurzschlußstrom der beiden Spulen einen annehmbaren Wert annimmt, kann in
den meisten Fällen nicht erfolgen, es sei denn, daß z. B. Widerstände oder Blindwiderstände in Reihe
Drosselspule zur Begrenzung der Stromstärke
zwischen den Anzapfkontakten
von StufentransformatorenA choke coil for limiting the current between the tapping contacts of step transformers during load switching is known, consisting of two coils attached to the magnetic core of the transformer and each comprising about half of the main magnetic flux of the transformer, each with one end at one of two movable coils Step selector contacts are connected. In this known arrangement, the two coils are connected in series, and the potential difference at the ends of the row of coils is equal to the potential difference between two successive stages of the regulator winding. The two coils are connected to two different contacts so that the current is limited between the regulator contacts by the counter voltage that is present in the two coils connected in series. In this case the flow in the two core halves remains in equilibrium. In this case, the ends of the series-connected coil system cannot rest on the same contact point of the regulator winding, as this would cause a short circuit. The number of turns of the coils connected in series to achieve one of the same electromotive force as the voltage between two control stages to correctly determine that the short-circuit current of the two coils assumes an acceptable value, can not be done in most cases, unless, for. B. Resistors or reactances in series Choke coil to limit the current
between the tap contacts
of step transformers
Anmelder:Applicant:
Ministerul Industriei Grele, Bukarest
Vertreter:Ministerul Industriei Grele, Bucharest
Representative:
Dr. E. Sturm, Patentanwalt,
München 23, Leopoldstr. 20Dr. E. Sturm, patent attorney,
Munich 23, Leopoldstr. 20th
Als Erfinder benannt:Named as inventor:
Stefan Grosu, Craiova (Rumänien)Stefan Grosu, Craiova (Romania)
geschaltet werden, wodurch jedoch zusätzliche Spannungsabfälle entstehen. Wenn mehr als zwei in Reihe geschaltete Spulen verwendet werden, kann eine genügende Begrenzung des Stromes zwar erreicht werden, jedoch wird das gesamte System aufwendig. can be switched, but this creates additional voltage drops. If more than two in Series connected coils are used, a sufficient limitation of the current can be achieved However, the entire system becomes complex.
Erfindungsgemäß wird deshalb eine Drosselspule der im vorhergehenden Absatz genannten Art vorgeschlagen, die dadurch gekennzeichnet ist, daß die anderen Enden der beiden Spulen dauernd miteinander verbunden sind und der Wicklungssinn der Spulen derart gewählt ist, daß bei Potentialgleichheit der beiden beweglichen Stuf en Wählerkontakte kein Kreisstrom in den Spulen fließt. Die Spulen sind hierbei vorzugsweise auf je einer Hälfte des mit einer Öffnung versehenen Transformator-Kernschenkels angeordnet. Sie können jedoch auch auf je einem Außenschenkel des in Mantelbauart ausgeführten Transformatorkerns angeordnet sein.According to the invention, therefore, a choke coil of the type mentioned in the preceding paragraph is proposed, which is characterized in that the other ends of the two coils are permanently connected to each other and the direction of winding of the coils is selected so that when the two movable stages are equal in potential, no circuit current in selector contacts the coils flows. The coils are in this case preferably arranged on each half of the transformer core leg provided with an opening. However, they can also be arranged on each outer leg of the transformer core, which is designed in a jacket design.
Es ist auch vorteilhaft, wenn mindestens eine der beiden Spulen zur feinstufigen Spannungseinstellung Anzapfungen besitzt, die an einen Umschalter geführt sind. Wenn beide Spulen Anzapfungen zur feinstufigen Einstellung besitzen, so sind diese derart an einen Umschalter geführt, daß die Anschlüsse der einen Spule mit den Anschlüssen der anderen Spule abwechseln.It is also advantageous if at least one of the two coils is used for fine voltage adjustment Has taps that are led to a changeover switch. When both coils are tapped for have fine adjustment, they are led to a changeover switch in such a way that the connections of the alternate one coil with the connections of the other coil.
Die F i g. 1 bis 5 zeigen den Erfindungsgegenstand. ;o F i g. 1 zeigt die prinzipielle Wirkungsweise;The F i g. 1 to 5 show the subject matter of the invention. ; o F i g. 1 shows the principle of operation;
F i g. 2 zeigt die Anordnung, bei der die Spulen auf dem Kernschenkel angeordnet sind;F i g. Fig. 2 shows the arrangement in which the coils are arranged on the core leg;
709 680/149709 680/149
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1961M0048265 DE1253357B (en) | 1961-03-03 | 1961-03-03 | Choke coil to limit the current between the tapping contacts of step transformers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1961M0048265 DE1253357B (en) | 1961-03-03 | 1961-03-03 | Choke coil to limit the current between the tapping contacts of step transformers |
FR855865A FR1283772A (en) | 1961-03-16 | 1961-03-16 | Device for adjusting the voltage of transformers under load |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1253357B true DE1253357B (en) | 1967-11-02 |
Family
ID=25987095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1961M0048265 Pending DE1253357B (en) | 1961-03-03 | 1961-03-03 | Choke coil to limit the current between the tapping contacts of step transformers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1253357B (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE337093C (en) * | 1918-08-29 | 1921-05-24 | Bergmann Elek Citaets Werke Ak | Circuit for step transformers in which the steps of the main transformer are bridged by means of the secondary winding of an auxiliary transformer |
US2146914A (en) * | 1936-04-07 | 1939-02-14 | Pintsch Julius Kg | Potential-regulating apparatus |
GB546437A (en) * | 1940-03-14 | 1942-07-14 | British Thomson Houston Co Ltd | Improvements in tap-changing circuits for electric transformers |
US2488418A (en) * | 1947-03-27 | 1949-11-15 | Oerlikon Maschf | Potential divider for stepwise regulation of transformers |
DE754479C (en) * | 1941-02-03 | 1954-07-26 | Siemens Schuckertwerke A G | Step control device for regulating transformers or regulating chokes |
DE762272C (en) * | 1933-07-22 | 1954-08-23 | Siemens Schuckertwerke A G | Control transformer with motor-driven coarse and fine-level control mechanism that can be switched under load |
-
1961
- 1961-03-03 DE DE1961M0048265 patent/DE1253357B/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE337093C (en) * | 1918-08-29 | 1921-05-24 | Bergmann Elek Citaets Werke Ak | Circuit for step transformers in which the steps of the main transformer are bridged by means of the secondary winding of an auxiliary transformer |
DE762272C (en) * | 1933-07-22 | 1954-08-23 | Siemens Schuckertwerke A G | Control transformer with motor-driven coarse and fine-level control mechanism that can be switched under load |
US2146914A (en) * | 1936-04-07 | 1939-02-14 | Pintsch Julius Kg | Potential-regulating apparatus |
GB546437A (en) * | 1940-03-14 | 1942-07-14 | British Thomson Houston Co Ltd | Improvements in tap-changing circuits for electric transformers |
DE754479C (en) * | 1941-02-03 | 1954-07-26 | Siemens Schuckertwerke A G | Step control device for regulating transformers or regulating chokes |
US2488418A (en) * | 1947-03-27 | 1949-11-15 | Oerlikon Maschf | Potential divider for stepwise regulation of transformers |
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