DE517014C - Heating transformer for large currents - Google Patents

Heating transformer for large currents

Info

Publication number
DE517014C
DE517014C DET37096D DET0037096D DE517014C DE 517014 C DE517014 C DE 517014C DE T37096 D DET37096 D DE T37096D DE T0037096 D DET0037096 D DE T0037096D DE 517014 C DE517014 C DE 517014C
Authority
DE
Germany
Prior art keywords
transformer
large currents
heating transformer
secondary winding
heating
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
DET37096D
Other languages
German (de)
Inventor
Mendel Osnos
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Priority to DET37096D priority Critical patent/DE517014C/en
Application granted granted Critical
Publication of DE517014C publication Critical patent/DE517014C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • H01F27/289—Shielding with auxiliary windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Description

Heiztransformator für große Stromstärken Es ist bekanntlich von Vorteil, die Heizung von Kathodenröhren so anzuordnen, daß die Mitte des Heizfadens .das Erdpotential erhält. Zu diesem Zweck wird gewöhnlich bei Heizung von. Kathodenröhren mittels eines Wechselstromtransformators die Sekundärwicklung des Transformators aus zwei hintereinandergeschalteten gleichen Teilen ausgeführt und die Verbindung derselben an die Erde angeschlossen.Heating transformer for large currents It is known to be advantageous to arrange the heating of cathode tubes so that the center of the filament .das Receives earth potential. This is usually done when heating. Cathode tubes the secondary winding of the transformer by means of an AC transformer made of two identical parts connected in series and the connection the same connected to the earth.

Soll nun der Heiztransformator für große sekundäre Stromstärken und kleine sekundäre Spannungen nur aus wenigen (z. B. aus drei) Windungen bestehende Sekundärwicklung besitzen, so ist die angegebene bekannte Ausführung der Sekundärwicklung aus zwei hintereinandergeschalteten gleichen Teilen mit praktischen Schwierigkeiten verbunden. Durch die Verbindungen zwischen den beiden Teilen wird die Gesamtlänge der Sekundärwicklung und hiermit auch her schädliche sekundäre Spannungsabfall verhältnismäßig stark vergrößert. Auch entstehen bei großen Stromstärken durch die für die Verbindung der einzelnen Teile der Sekundärwicklung notwendigen massiven Kabelschuhe große Stromverluste. Man kann diese Schwierigkeit dadurch umgehen, :daß man außerhalb des Transformators parallel zu seinen Klemmen einen O'hmschen oder induktiven Spannungsteiler anschließt und die -litte dieses Spannungsteilers erdet. Ein derartiger Spannungsteiler .erzeugt, wenn er als ein Ohmscher Widerstand ausgeführt ist, zusätzliche Verluste; wird er aber als ein induktiver Widerstand ausgebildet, so .erfordert er, um nicht zu große Dimensionen zu benötigen, einen Eisenkern.Should now the heating transformer for large secondary currents and small secondary voltages consisting of only a few (e.g. three) turns If you have a secondary winding, then this is the known design of the secondary winding consisting of two identical parts connected in series with practical difficulties tied together. The connections between the two parts make up the total length the secondary winding and herewith also damaging secondary voltage drop proportionally greatly enlarged. Also arise in the case of high currents due to the connection the individual parts of the secondary winding necessary massive cable lugs Power losses. One can avoid this difficulty by: being outside of the transformer has an O'hm or inductive voltage divider in parallel with its terminals and the -litte of this voltage divider is grounded. Such a voltage divider .generates additional losses if it is designed as an ohmic resistor; but if it is designed as an inductive resistor, then it does not require it too large dimensions to need an iron core.

-Nach der Erfindung kann man die angegebenen Schwierigkeiten ohne besondere, außerhalb des Transformators anzuordnende Apparate umgehen, und zwar dadurch, daß auf dem Transforinatorkern parallel zur Sekundärwicklung eine Hilfswicklung angebracht ist, deren Mittelpunkt an das Erdpotential angelegt wird. Da der durch die Erde fließende Gleichstrom verhältnismäßig klein ist, so sind auch die Verluste in dieser Hilfswicklung verhältnismäßig klein. Die Sekundärwicklung kann aber auf diese Weise ganz normal ausgeführt werden.-According to the invention, one can face the stated difficulties without avoid special equipment to be placed outside the transformer, namely in that on the transformer core parallel to the secondary winding an auxiliary winding attached, the center of which is applied to the earth potential. Since the through The direct current flowing through the earth is relatively small, so are the losses relatively small in this auxiliary winding. The secondary winding can, however can be done as normal.

Claims (1)

PATENTANSPRUCH: Heiztransformator für große Stromstärken, insbesondere fürKathodenröhrenanlagen, dadurch gekennzeichnet, daß auf dem Tr anäformatorkern parallel zur Sekundärwicklung eine Hilfswicklung angebracht ist, deren Mittelpunkt als an das Erdpotential anzulegender neutraler Punkt dient.PATENT CLAIM: Heating transformer for large currents, in particular for cathode tube systems, characterized in that on the transformer core an auxiliary winding is attached parallel to the secondary winding, its center point serves as a neutral point to be applied to the earth potential.
DET37096D 1929-06-15 1929-06-15 Heating transformer for large currents Expired DE517014C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET37096D DE517014C (en) 1929-06-15 1929-06-15 Heating transformer for large currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET37096D DE517014C (en) 1929-06-15 1929-06-15 Heating transformer for large currents

Publications (1)

Publication Number Publication Date
DE517014C true DE517014C (en) 1931-01-30

Family

ID=7559852

Family Applications (1)

Application Number Title Priority Date Filing Date
DET37096D Expired DE517014C (en) 1929-06-15 1929-06-15 Heating transformer for large currents

Country Status (1)

Country Link
DE (1) DE517014C (en)

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