DE372112C - Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line - Google Patents

Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line

Info

Publication number
DE372112C
DE372112C DES58013D DES0058013D DE372112C DE 372112 C DE372112 C DE 372112C DE S58013 D DES58013 D DE S58013D DE S0058013 D DES0058013 D DE S0058013D DE 372112 C DE372112 C DE 372112C
Authority
DE
Germany
Prior art keywords
loaded
circuit
coils
line
impedance
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
DES58013D
Other languages
German (de)
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Publication date
Priority to DES58013D priority Critical patent/DE372112C/en
Application granted granted Critical
Publication of DE372112C publication Critical patent/DE372112C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length

Description

Es ist schon vorgeschlagen worden, zur Nachbildung des Scheinwiderstandes von mit Spulen belasteten langen Leitungen geeignete Schaltmittel der belasteten Leitung zuzufügen, durch welche der resultierende Scheinwiderstand derselben so umgebildet wird, daß er im Bereich der Betriebs-■ frequenzen sich praktisch wie der Wellenwiderstand einer homogenen Leitung verhält, ίο so daß die Nachbildung auch wie bei einer solchen vorgenommen werden kann.It has already been proposed to simulate the impedance of long lines loaded with coils, suitable switching means for the loaded line add, through which the resulting impedance of the same so transformed that it is practically like the wave resistance in the range of the operating frequencies a homogeneous line behaves, ίο so that the replica also as with a such can be made.

Die zusätzlichen Schaltmittel bestehen aus einem parallel zur Leitung geschalteten Kondensator und einem oder zwei aus Kapazität und Induktivität bestehenden Schwingungskreisen, die in Reihe in die Leitung geschaltet sind.The additional switching means consist of a capacitor connected in parallel to the line and one or two oscillating circuits consisting of capacitance and inductance connected in series in the line are.

Bei dieser Anordnung entsteht eine gewisse Unsymmetrie in der Leitung, weil der Schwingungskreis sich nur in einer Ader der Leitung befindet. Wenn die Leitung als Vierer geschaltet werden soll, ist diese Unsymmetrie störend. Nun ist schon vorgeschlagen worden, für diesen Zweck in jeder Ader einen Schwingungskreis zu benutzen, deren Induktionsspulen auf einem gemeinsamen Eisenkern sitzen, um den Scheinwiderstand bei Parallelschaltung beider Adern, wie sie beim Viererbetrieb notwendig ist, herabzusetzen. Man erhält in dieser Weise die Schaltung nach Abb. 1.This arrangement creates a certain asymmetry in the line because of the The oscillation circuit is only in one wire of the line. If the line as Four is to be switched, this asymmetry is disruptive. Now is already suggested been to use an oscillating circuit in each wire for this purpose, the induction coils on a common Iron core sit in order to reduce the impedance when both wires are connected in parallel, as is necessary for four-way operation. to belittle. The circuit shown in Fig. 1 is obtained in this way.

Dadurch wird zwar eine vollständige Symmetrie erreicht, die Schaltungsart bringt aber den Übelstand mit sich, daß drei einstellbare Kapazitäten vorhanden sind, wodurch die Einstellung natürlich wesentlich erschwert wird.As a result, a complete symmetry is achieved, which brings the type of circuit but the disadvantage with it that three adjustable capacities are available, whereby the setting is of course made much more difficult.

Die Erfindung geht nun von der Überlegung aus, daß der Scheinwiderstand der Kondensatoren des Schwingungskreises klein ist gegen den der Spulen in Parallelschaltung (dieser besteht bekanntlich nur aus dem kleinen Verlustwiderstand der Spulen). Daher bedeutet es keine fühlbare Verschlechterung der Symmetrie, wenn man die beiden Kondensatoren durch einen einzigen in der einen Ader liegenden ersetzt.The invention is based on the consideration that the impedance of the The capacitors of the resonant circuit are small compared to those of the coils in parallel (As is well known, this only consists of the small loss resistance of the coils). Therefore there is no noticeable deterioration in symmetry if you put the two capacitors through a single one in the one core replaced.

Diese Anordnung ist in Abb. 2 veranschaulicht. Die Kapazitäten C1, C2 nach Abb. ι sind durch eine einzige Kapazität C3 ersetzt.This arrangement is illustrated in Fig. 2. The capacities C 1 , C 2 according to Fig. Ι are replaced by a single capacity C 3 .

Claims (1)

Patent-Anspruch:Patent claim: Schaltung zur Änderung des Schein-Widerstandes von mit Spulen belasteten langen Leitungen durch zusätzliche, der belasteten Leitung zugefügte Schaltmittel zwecks Erleichterung der Nachbildung, gekennzeichnet durch einen parallel zur Leitung geschalteten Kondensator und einen Schwingungskreis in einer Ader, dessen Induktivität mit einer in der zweiten Ader liegenden entsprechenden Induktivität auf einen gemeinsamen Kern gewickelt ist.Circuit for changing the apparent resistance of loaded with coils long lines through additional switching means added to the loaded line for the purpose of facilitating the simulation, characterized by a capacitor and connected in parallel to the line an oscillating circuit in one wire, its inductance with a corresponding one in the second wire Inductance is wound on a common core.
DES58013D Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line Expired DE372112C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES58013D DE372112C (en) Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES58013D DE372112C (en) Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line

Publications (1)

Publication Number Publication Date
DE372112C true DE372112C (en) 1923-03-22

Family

ID=7492245

Family Applications (1)

Application Number Title Priority Date Filing Date
DES58013D Expired DE372112C (en) Circuit for changing the impedance of long lines loaded with coils by additional switching means added to the loaded line

Country Status (1)

Country Link
DE (1) DE372112C (en)

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