DE583772C - Device for monitoring a DC voltage by means of a glow tube - Google Patents

Device for monitoring a DC voltage by means of a glow tube

Info

Publication number
DE583772C
DE583772C DEQ61113D DEQ0061113D DE583772C DE 583772 C DE583772 C DE 583772C DE Q61113 D DEQ61113 D DE Q61113D DE Q0061113 D DEQ0061113 D DE Q0061113D DE 583772 C DE583772 C DE 583772C
Authority
DE
Germany
Prior art keywords
voltage
glow
tube
glow tube
monitoring
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
DEQ61113D
Other languages
German (de)
Inventor
Ernst Mittelstedt
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEQ61113D priority Critical patent/DE583772C/en
Application granted granted Critical
Publication of DE583772C publication Critical patent/DE583772C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/12—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being glow discharge tubes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Description

Einrichtung zur Überwachung einer Gleichspannung mittels einer Glimmröhre Glimmlampen bzw. Glimmröhren zünden bekanntlich stets bei einer bestimmten Spannung, die abhängig ist von der Bauart dieser Röhren. In der Regeltechnik verwendet man häufig die Glimmröhren als spannungsabhängige Widerstände. Man legt sie zu diesem Zweck an eine veränderliche Gleichspannung, so daß bei Veränderung der Gleichspannung bei Überschreiten der Zündspannung der Glimmröhren die Glimmlampen zünden und einen Regelvorgang auslösen. Diese Anordnung hat nun den Nachteil, daß die Ansprech-oder Zündspannung der Glimmröhren relativ hoch liegt, etwa bei iao bis 16o Volt, während für viele Fälle der Praxis wesentlich geringere Ansprechspannungen erwünscht sind.Device for monitoring a DC voltage by means of a glow tube It is well known that glow lamps or glow tubes always ignite at a certain voltage, which depends on the design of these tubes. In the control technology one uses often the glow tubes as voltage-dependent resistors. You put them to this one Purpose of a variable DC voltage, so that when the DC voltage changes If the ignition voltage of the glow tubes is exceeded, the glow lamps ignite and one Trigger control process. This arrangement now has the disadvantage that the response or The ignition voltage of the glow tubes is relatively high, around iao to 16o volts, while in many cases in practice much lower response voltages are desired.

Nach der Erfindung werden die Nachteile der bekannten Einrichtungen dadurch beseitigt, daß außer der Gleichspannung an die Elektroden der Glimmröhren über einen Kondensator eine Wechselspannung angelegt wird. Zweckmäßig wird hierbei durch entsprechende Bemessung des. Vorwiderstandes der Röhren auch deren Belastungsverhältnisse entsprechend der geänderten Zündspannung geändert. Man wählt z. B. den Vorwiderstand derart, daß die Röhren entsprechend dem tiefer gelegten Zündpunkt bei den bisherigen Ansprechspannungen schon voll belastet sind.According to the invention, the disadvantages of the known devices thereby eliminating the fact that in addition to the direct voltage to the electrodes of the glow tubes An alternating voltage is applied via a capacitor. It is useful here by appropriate dimensioning of the series resistance of the tubes also their load conditions changed according to the changed ignition voltage. One chooses z. B. the series resistor in such a way that the tubes correspond to the lower ignition point in the previous Response voltages are already fully loaded.

Das Anlegen der Wechselspannung über den Kondensator an die Elektroden der Röhren geschieht zweckmäßig über einen Transformator, während die Gleichspannung gegebenenfalls über einen abstimmbaren Vorwiderstand direkt an die Elektroden angeschlossen wird. Auf diese Weise wird vermieden, daß die Gleichspannung über die Sekundärwicklung des Transformators kurzgeschlossen wird. Zündet ohne Anlegung der Wechselspannung die Glimmröhre bei einer Spannung von etwa iao Volt, so wird sie bei einer über einen Kondensator von i MF angelegten Wechselspannung von etwa aao Volt schon bei 6o Volt Gleichspannung zünden. Ein weiterer Vorteil der Anordnung gemäß der Erfindung besteht darin, daß der Strom in der Röhre nach erfolgter Zündung und bei zunehmender Gleichspannung wesentlich langsamer ansteigt als bei der bekannten Anordnung ohne Wechselspannung.The application of the alternating voltage to the electrodes via the capacitor the tubes is conveniently done via a transformer, while the DC voltage if necessary, connected directly to the electrodes via a tunable series resistor will. In this way it is avoided that the DC voltage across the secondary winding of the transformer is short-circuited. Ignites without the application of AC voltage the glow tube at a voltage of about iao volts, it will be at one over a capacitor of i MF applied alternating voltage of about aao volts already at Ignite 6o volts DC voltage. Another advantage of the arrangement according to the invention consists in the fact that the current in the tube after ignition and with increasing DC voltage increases much more slowly than in the known arrangement without AC voltage.

Die Erfindung eignet sich besonders für Regeleinrichtungen nach dem Tirrillprinzip, bei welchen durch die Glimmröhren der von den Tirrillkontakten kurzzuschließende Widerstand in Abhängigkeit von der Erregerspannung verändert wird.The invention is particularly suitable for control devices according to the Tirrill principle, in which the glow tube to be short-circuited by the Tirrill contacts Resistance is changed depending on the excitation voltage.

Claims (1)

PATENTANSPRÜCHE: i. Einrichtung zur Überwachung einer Gleichspannung mittels einer Glimmröhre, insbesondere für Regelzwecke, dadurch gekennzeichnet, daß an den Elektroden der Glimmröhre außer der zu überwachenden Gleichspannung über einen Kondensator eine Wechselspannung anliegt, welche die Ansprechspannung der Glimmröhre erniedrigt. a. Einrichtung nach Anspruch r, gekennzeichnet durch einen vor der Röhre liegenden Vorschaltwiderstand, der so bemessen ist, daß die Röhre bei der Spannung, die ohne Wechselspannung zum Zünden erforderlich ist, schon annähernd voll belastet ist.PATENT CLAIMS: i. Device for monitoring a direct voltage by means of a glow tube, in particular for control purposes, characterized in that that at the electrodes of the glow tube except for the DC voltage to be monitored a capacitor an alternating voltage is applied, which is the response voltage the glow tube is lowered. a. Device according to claim r, characterized by a series resistor located in front of the tube, which is dimensioned so that the Tube at the voltage that is required for ignition without alternating voltage is almost fully loaded.
DEQ61113D 1931-03-12 1931-03-12 Device for monitoring a DC voltage by means of a glow tube Expired DE583772C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEQ61113D DE583772C (en) 1931-03-12 1931-03-12 Device for monitoring a DC voltage by means of a glow tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEQ61113D DE583772C (en) 1931-03-12 1931-03-12 Device for monitoring a DC voltage by means of a glow tube

Publications (1)

Publication Number Publication Date
DE583772C true DE583772C (en) 1933-09-09

Family

ID=7394912

Family Applications (1)

Application Number Title Priority Date Filing Date
DEQ61113D Expired DE583772C (en) 1931-03-12 1931-03-12 Device for monitoring a DC voltage by means of a glow tube

Country Status (1)

Country Link
DE (1) DE583772C (en)

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