DE871482C - Stray field transformer - Google Patents

Stray field transformer

Info

Publication number
DE871482C
DE871482C DEM8084A DEM0008084A DE871482C DE 871482 C DE871482 C DE 871482C DE M8084 A DEM8084 A DE M8084A DE M0008084 A DEM0008084 A DE M0008084A DE 871482 C DE871482 C DE 871482C
Authority
DE
Germany
Prior art keywords
stray field
field transformer
transformer
shunt
fixed
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
Application number
DEM8084A
Other languages
German (de)
Inventor
Friedrich Dipl-Ing Decher
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.)
May & Christe Transformatorenf
Original Assignee
May & Christe Transformatorenf
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 May & Christe Transformatorenf filed Critical May & Christe Transformatorenf
Priority to DEM8084A priority Critical patent/DE871482C/en
Application granted granted Critical
Publication of DE871482C publication Critical patent/DE871482C/en
Expired legal-status Critical Current

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
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Description

Bei Streufeld-Transformatoren mit Mittelpunktserdung besteht die Gefahr ihrer Zerstörung beim Auftreten eines halbseitigen Kurzschlusses.There is a risk of stray field transformers with center point earthing their destruction when a half-sided short circuit occurs.

Die Ursache kann z. B. eine Kabelbeschädigung sein. Infolge dieser einseitigen Belastung tritt in der Sekundärwicklungdes Streufeld-Transformators eine Erwärmung auf, welche .die vom VDE zulässigen Grenzwerte weit überschreitet.The cause can be B. be a cable damage. As a result of this one-sided loading occurs in the secondary winding of the leakage field transformer a temperature rise which far exceeds the limit values permitted by the VDE.

Der sekundäre Kurzschlußstrom steigt je nach .der Auslegung .des Transformators um das 1,5- bis 2fache des Stromes bei normalem Klemmenkurzschluß.The secondary short-circuit current increases depending on the design of the transformer 1.5 to 2 times the current with a normal terminal short circuit.

Es wäre zur Beseitigung dieses Übelstandes erforderlich, den Drahtquerschnitt der Sekundärwicklung entsprechend zu erhöhen. Lies führt zu einem erhöhten Kupferbedarf und damit zu einer beachtlichen Preiserhöhung.It would be necessary to remedy this drawback, the wire cross-section to increase the secondary winding accordingly. Lies leads to an increased copper requirement and thus to a considerable price increase.

Der in der Zeichnung dargestellte Streufeld-Transformator nach der Erfindung enthält außer dem verschiebbaren Streufeldjoch einen festen magnetischen Nebenschluß i bzw. 2 in Form eines Bügels aus Dynamoblech, der sich über jeden Schenkel, auf welchem je eine Sekundär- :und eine Primärspule angeordnet ist, erstreckt. Dieser zusätzliche Nebenschluß bewirkt im halbseitigen Kürzschluß eine beträchtliche Herabsetzung des Stromes, ist aber auf den normalen Betrieb praktisch ohne Einfluß.The stray field transformer shown in the drawing after In addition to the movable stray field yoke, the invention contains a fixed magnetic yoke Shunt i or 2 in the form of a bracket made of dynamo sheet, which extends over each leg, on each of which a secondary: and a primary coil is arranged, extends. This additional shunt causes a considerable reduction in the half-sided short-circuit of the current, but has practically no effect on normal operation.

Die Änderung des Normalbetriebes erfolgt in bekannter Weise durch den verstellbaren magnetischen Nebenschluß.The normal operation is changed in a known manner the adjustable magnetic shunt.

Der feste Nebenschluß kann -die Wicklungen ganz (Ausführung i) oder nur teilweise (Ausführung 2) überbrücken, es ist also nicht unbedingt erforderlich, denselben über den ganzen Schenkel auszudehnen.The fixed shunt can -the windings completely (version i) or bridge only partially (version 2), so it is not absolutely necessary to extend it over the whole thigh.

Claims (1)

PATENTANSPRUCH: Streufeld-Tränsformator, festeingestellt oder regelbar,- gekennzeichnet durch die Anordnung eines zusätzlichen festen, magnetischen Nebenschlusses, der die Wicklungen ganz oder nur teilweise überbrückt.PATENT CLAIM: Stray field impregnation transformer, fixed or adjustable, characterized by the arrangement of an additional fixed, magnetic shunt, which bridges the windings in whole or in part.
DEM8084A 1951-01-03 1951-01-03 Stray field transformer Expired DE871482C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM8084A DE871482C (en) 1951-01-03 1951-01-03 Stray field transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM8084A DE871482C (en) 1951-01-03 1951-01-03 Stray field transformer

Publications (1)

Publication Number Publication Date
DE871482C true DE871482C (en) 1953-03-23

Family

ID=7294006

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM8084A Expired DE871482C (en) 1951-01-03 1951-01-03 Stray field transformer

Country Status (1)

Country Link
DE (1) DE871482C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057221B (en) * 1956-02-16 1959-05-14 Fritz Knobel Stray field transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057221B (en) * 1956-02-16 1959-05-14 Fritz Knobel Stray field transformer

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