DE1232654B - Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters - Google Patents

Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters

Info

Publication number
DE1232654B
DE1232654B DE1965V0027862 DEV0027862A DE1232654B DE 1232654 B DE1232654 B DE 1232654B DE 1965V0027862 DE1965V0027862 DE 1965V0027862 DE V0027862 A DEV0027862 A DE V0027862A DE 1232654 B DE1232654 B DE 1232654B
Authority
DE
Germany
Prior art keywords
circuit
luminous flux
fluorescent lamps
circuit arrangement
lamp current
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
Application number
DE1965V0027862
Other languages
German (de)
Inventor
Wolfgang Brenner
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.)
WERK fur ELEKTRONISCHE BAUGRU
WETRON WEIDA BETRIEB KOMB
Original Assignee
WERK fur ELEKTRONISCHE BAUGRU
WETRON WEIDA BETRIEB KOMB
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 WERK fur ELEKTRONISCHE BAUGRU, WETRON WEIDA BETRIEB KOMB filed Critical WERK fur ELEKTRONISCHE BAUGRU
Priority to DE1965V0027862 priority Critical patent/DE1232654B/en
Publication of DE1232654B publication Critical patent/DE1232654B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53846—Control circuits
    • H02M7/53862—Control circuits using transistor type converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53846—Control circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Description

Schaltungsanordnung zur Lampenstrom- und Lichtstromstabilisierung von an Transistorwechselrichtern betriebenen Leuchtstofflampen Die Erfindung betrifft eine Schaltung für Transistorwechselrichter, welche den Betrieb von Leuchtstofflampen an kleinen Gleichspannungen, wie sie z. B. in Bordnetzen von Eisenbahnen, Autobussen, Flugzeugen und anderen Verkehrsmitteln vorkommen, ermöglichen, ohne daß bei stark schwankender Spannung des Bordnetzes der Lampenstrom und damit der Lichtstrom der angeschlossenen Leuchtstofflampen merkliche Schwankungen aufweist.Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters The invention relates to a circuit for transistor inverters, which enables the operation of fluorescent lamps at small DC voltages, as z. B. in on-board networks of railways, buses, Airplanes and other means of transport occur, allow without being heavily fluctuating voltage of the vehicle electrical system the lamp current and thus the luminous flux of the connected fluorescent lamps shows noticeable fluctuations.

Es ist bereits eine Schaltung bekannt, bei welcher die Kollektor-Emitter-Strecke eines Transistors zur Begrenzung und Konstanthaltung des Lampenstroms dient, wobei der Transistor entweder unmittelbar zwischen Gleichspannungsquelle und Wechselrichter liegt oder von einer Zusatzwicklung des Wechselrichters über entsprechende Gleichrichter gespeist wird. Neben dem relativ hohen Aufwand verschlechtert sich aber dadurch auch der Wirkungsgrad.A circuit is already known in which the collector-emitter path a transistor is used to limit and keep the lamp current constant, with the transistor either directly between the DC voltage source and the inverter or from an additional winding of the inverter via appropriate rectifiers is fed. In addition to the relatively high effort, this deteriorates also the efficiency.

Es ist auch gebräuchlich, bei Transistorvorschaltgeräten mit selbstgeführten Transistorwechselrichtern eine Induktivität in den Lampenkreis zu schalten. Neben der Strombegrenzung ergibt sich gleichzeitig eine Stabilisation des Lampen- und Lichtstroms, weil sich mit ändernder Speisegleichspannung auch die Frequenz der Lampenspannung in einem solchen Sinn ändert, daß sich im Zusammenhang mit dem induktiven Strombegrenzungsglied eine annähernde Kompensation ergibt. Diese ist um so besser, je höher der Spannungsabfall über dem induktiven Strombegrenzungsglied ist, womit sich jedoch der Wirkungsgrad wieder verschlechtert.It is also common practice in transistor ballasts with self-commutated transistor inverters to switch an inductance into the lamp circuit. In addition to the current limitation, the lamp and luminous flux are stabilized at the same time, because as the DC supply voltage changes, the frequency of the lamp voltage also changes in such a way that an approximate compensation results in connection with the inductive current limiting element. This is all the better, the higher the voltage drop across the inductive current limiting element, which, however, causes the efficiency to deteriorate again.

Weiterhin sind bereits Schaltungen bekannt, mit welchen die Frequenz in Abhängigkeit von Änderungen der Netzgleichspannung in dem Lampenstrom konstanthaltenden Sinn stärker als proportional verändert wird. Der Aufwand ist jedoch beträchtlich.Furthermore, circuits are already known with which the frequency depending on changes in the DC line voltage in the lamp current constant Meaning is changed more than proportionally. However, the effort is considerable.

Weiterhin ist aus der Literatur eine Schaltung bekannt, bei welcher dem Steuerwiderstand im Basiskreis einer Gegentakttransistorwechselrichterschaltung eine RC-Kombination aus Kondensator und Heißleiter parallel liegt. Diese Anordnung wirkt bei Netzspannungsschwankungen den gleichsinnigen Änderungen des Lampenstroms entgegen, wodurch der Lichtstrom bei Netzspannungsschwankungen annähernd konstant bleibt.Furthermore, a circuit is known from the literature in which the control resistor in the base circuit of a push-pull transistor inverter circuit an RC combination of capacitor and thermistor is parallel. This arrangement affects the changes in the lamp current in the same direction in the event of mains voltage fluctuations contrary, whereby the luminous flux is almost constant in the event of mains voltage fluctuations remain.

Von erheblichem Nachteil ist jedoch die große Trägheit der Regeleinrichtung, welche durch den Heißleiter begründet ist.A considerable disadvantage, however, is the great inertia of the control device, which is justified by the NTC thermistor.

Bei plötzlichen Spannungsschwankungen im Bordnetz treten kurzzeitige störende Lichtzuckungen auf. Zweck der Erfindung ist es, eine Schaltungsanordnung zu finden, welche mit geringem technischem Aufwand die oben aufgezeigten Nachteile vermeidet.In the event of sudden voltage fluctuations in the vehicle electrical system, brief annoying flashes of light. The purpose of the invention is to provide a circuit arrangement to find which with little technical effort the disadvantages outlined above avoids.

Der Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung für ein Transistorvorschaltgerät zur Speisung von Leuchtstofflampen aus einem Gleichspannungsnetz über einen Transistorwechselrichter zu finden, bei welcher trotz stark schwankender Speisegleichspannung mit einer Regelung im Basisstromkreis der Transistoren eine weitgehende Stabilisierung des Lampen- und Lichtstroms der angeschlossenen Leuchtstofflampe erreicht wird.The invention is based on the object of a circuit arrangement for a transistor ballast for supplying fluorescent lamps from a DC voltage network via a transistor inverter to find which despite strongly fluctuating DC supply voltage with regulation in the base circuit of the transistors extensive stabilization of the lamp and luminous flux of the connected fluorescent lamp is achieved.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß parallel zu einem Basissteuerkreiswiderstand der Transistorwechselrichterschaltung eine Reihenschaltung aus einem Kondensator und einer Zenerdiode oder aus einem Kondensator und zwei oder mehr gegeneinandergeschalteten Zenerdioden liegt.According to the invention this object is achieved in that parallel to a base control circuit resistor of the transistor inverter circuit forms a series circuit from a capacitor and a zener diode or from a capacitor and two or more Zener diodes connected against each other.

Durch die erfindungsgemäße Schaltungsanordnung werden die eben aufgeführten Nachteile beseitigt. Insbesondere fällt das lästige Schwanken der Helligkeit bei Leuchtstofflampen weg, durch welches bisher die Passagiere, insbesondere in Eisenbahnfahrzeugen, belästigt wurden.By means of the circuit arrangement according to the invention, those just listed are Disadvantages eliminated. In particular, the annoying fluctuation in brightness is a problem Fluorescent lamps, through which passengers, especially in railway vehicles, were harassed.

Ein besonderer Vorteil ist durch den geringen Aufwand der erfindungsgemäßen Schaltung gegeben. Es werden dadurch die teuren Regler, z. B. Kohledruckregler in Eisenbahnzügen, entbehrlich, welche mit geringem Wirkungsgrad sowie großem Verschleiß arbeiten und einer ständigen Wartung bedürfen.A particular advantage is due to the low cost of the invention Circuit given. Thereby the expensive regulator, z. B. coal pressure regulator in Railway trains, dispensable, those with low efficiency and high wear work and require constant maintenance.

Demgegenüber arbeitet die vorgeschlagene Anordnung völlig verschleiß- und wartungsfrei.In contrast, the proposed arrangement works completely wear-resistant and maintenance free.

C Die Erfindung soll nachstehend an zwei Ausführungsbeispielen näher erläutert werden. In den Zeichnungen zeigt F i g. 1 die Grundschaltung, F i g. 2 die erweiterte Grundschaltung mit verbesserter Wirkung. C The invention is to be explained in more detail below using two exemplary embodiments. In the drawings, F i g. 1 the basic circuit, F i g. 2 the extended basic circuit with improved effect.

Nach F i g. 1 sind die beiden Emitter der Transistoren 1 und 2 mit den beiden Primärwicklungen 7 und 8 des Schwingtransforinators 12 verbunden, während die beiden Kollektoren der Transistoren direkt miteinander verbunden sind.According to FIG. 1 , the two emitters of the transistors 1 and 2 are connected to the two primary windings 7 and 8 of the oscillating transformer 12, while the two collectors of the transistors are connected directly to one another.

Gesteuert werden die Transistoren 1 und 2 über ihre Basen durch die Rückkopplungswicklungen 9 und 10. Der Widerstand 6 dient als Anschwinghilfe, während der einstellbare Widerstand 5 im gemeinsamen Basiskreis als Steuerwiderstand dient. Ihm parallel liegt erfindungsgemäß eine Reihenschaltung aus einem Kondensator 4 sowie einer Zenerdiode 3 als spannungsstabilisierendes Schaltungselement. Diese Anordnung der Schaltungselemente 3 und 4 bewirkt, daß bei Schwankungen der Speisespannung an den Klemmen 13, 14 die Wechselspannungskomponente an der Reihenschaltung 3 und 4 konstant bleibt.The transistors 1 and 2 are controlled via their bases by the feedback windings 9 and 10. The resistor 6 serves as an oscillation aid, while the adjustable resistor 5 in the common base circuit serves as a control resistor. According to the invention, parallel to it is a series circuit comprising a capacitor 4 and a Zener diode 3 as a voltage-stabilizing circuit element. This arrangement of the circuit elements 3 and 4 has the effect that, in the event of fluctuations in the supply voltage at the terminals 13, 14, the AC voltage component at the series circuit 3 and 4 remains constant.

Damit liegt auch eine konstante Aussteuerung der Transistoren 1 und 2 vor.There is thus also a constant modulation of transistors 1 and 2.

Der Lampen- und Lichtstrom einer an die hier beispielsweise dargestellten Sekundärwicklung 11 des Transistorwechselrichters weist dann keine merklichen Schwankungen mehr auf. Insbesondere arbeitet die Regelung trägelos. Eine weiter ergänzte Schaltung zeigt F i g. 2, be welcher durch eine Gegeneinanderschaltung zweiei Zenerdioden 3 eine weitere Verbesserung der Sta. bilisierung möglich ist. Die Wirkungsweise ist in Prinzip dieselbe wie die nach F i g. 1. The lamp and luminous flux of a secondary winding 11 of the transistor inverter, shown here for example, then no longer has any noticeable fluctuations. In particular, the regulation works without a sluggishness. A further supplemented circuit is shown in FIG. 2, in which by connecting two zener diodes 3 against one another, a further improvement of the Sta. bilization is possible. The mode of operation is in principle the same as that according to FIG. 1.

Claims (2)

Patentansprüche: 1. Schaltungsanordnung zur Lampen- un# Lichtstromstabilisierung von aus einer Gleichspannung gespeisten, über Transistorwechselrichter betriebenen Leuchtstofflampen be, Schwankungen der Speisegleichspannung mil einer Regelung im Basisstromkreis der Transistoren, gekennzeichnet dadurch, daf parallel zu einem Basissteuerkreiswiderstand(S# eine Reihenschaltung aus einem Kondensator(d# und einer Zenerdiode (3) liegt. Claims: 1. Circuit arrangement for lamp and luminous flux stabilization of fluorescent lamps fed from a DC voltage and operated via transistor inverters, fluctuations in the DC supply voltage with a regulation in the base circuit of the transistors, characterized in that parallel to a base control circuit resistor (S # a series circuit of a capacitor (d # and a zener diode (3) . 2. Schaltungsanordnung nach Anspruch 1, da. durch gekennzeichnet, daß die stabilisierend( Zenerdiode (3) durch zwei oder mehrere Zenerdioden ersetzt ist, welche gegeneinander und ir Reihe mit dem Kondensator (4) geschaltet sind In Betracht gezogene Druckschriften: Deutsche Auslegeschriften Nr. 1061438, 1128 041; »BBC-Nachrichten«, 1962, H. 7 (Juli 1962), S. 308 bis 312. 2. Circuit arrangement according to claim 1, there. characterized by that the stabilizing (Zener diode (3) is replaced by two or more Zener diodes, which are connected against each other and ir series with the capacitor (4) Contemplated publications: German Auslegeschrift No. 1 061 438, 1128 041; "BBC. Nachrichten ”, 1962, no. 7 (July 1962), pp. 308 to 312.
DE1965V0027862 1965-02-23 1965-02-23 Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters Pending DE1232654B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1965V0027862 DE1232654B (en) 1965-02-23 1965-02-23 Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1965V0027862 DE1232654B (en) 1965-02-23 1965-02-23 Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters

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DE1232654B true DE1232654B (en) 1967-01-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005335A (en) * 1975-07-15 1977-01-25 Iota Engineering Inc. High frequency power source for fluorescent lamps and the like

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061438B (en) * 1958-02-21 1959-07-16 Licentia Gmbh Operating arrangement for preheating and current limitation of fluorescent lamps
DE1128041B (en) * 1958-03-10 1962-04-19 Licentia Gmbh Circuit arrangement for supplying fluorescent lamps from a direct current network via a transistor inverter and transistor inverter for the circuit arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061438B (en) * 1958-02-21 1959-07-16 Licentia Gmbh Operating arrangement for preheating and current limitation of fluorescent lamps
DE1128041B (en) * 1958-03-10 1962-04-19 Licentia Gmbh Circuit arrangement for supplying fluorescent lamps from a direct current network via a transistor inverter and transistor inverter for the circuit arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005335A (en) * 1975-07-15 1977-01-25 Iota Engineering Inc. High frequency power source for fluorescent lamps and the like

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