EP0063507B1 - Elektronischer Starter für Fluoreszenzlampen, mit einem, mit einem Überspannungsschaltkreis und einem Vorwärmstromkreis zusammenwirkenden Zeitverzögerungsstromkreis - Google Patents

Elektronischer Starter für Fluoreszenzlampen, mit einem, mit einem Überspannungsschaltkreis und einem Vorwärmstromkreis zusammenwirkenden Zeitverzögerungsstromkreis Download PDF

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Publication number
EP0063507B1
EP0063507B1 EP82400510A EP82400510A EP0063507B1 EP 0063507 B1 EP0063507 B1 EP 0063507B1 EP 82400510 A EP82400510 A EP 82400510A EP 82400510 A EP82400510 A EP 82400510A EP 0063507 B1 EP0063507 B1 EP 0063507B1
Authority
EP
European Patent Office
Prior art keywords
circuit
switching element
overvoltage
capacitor
voltage
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
EP82400510A
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English (en)
French (fr)
Other versions
EP0063507A1 (de
Inventor
Michel Jublot
Jean-Louis Freycenet
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.)
Mazda Eclairage
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Mazda Eclairage
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 Mazda Eclairage filed Critical Mazda Eclairage
Priority to AT82400510T priority Critical patent/ATE25316T1/de
Publication of EP0063507A1 publication Critical patent/EP0063507A1/de
Application granted granted Critical
Publication of EP0063507B1 publication Critical patent/EP0063507B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices

Definitions

  • a fluorescent tube, fitted with a stabilization ballast, is generally lit using a bimetallic starter; such means have contacts which are put out of use in the more or less long term, often being activated several times for the same ignition. This has the consequence of producing, before the final lighting, a series of beats, which is troublesome for the user, and which causes a significant blackening of the electrodes of the fluorescent tube.
  • the invention aims to remedy these drawbacks, and relates to a low-cost electronic choke as well as a small footprint, which allows the ignition of any fluorecent tube in less than two seconds and without untimely beating.
  • the timer circuit cooperates with these first two circuits, by means of a single switching device: on the one hand, to determine the preheating time, on the other hand, to prohibit the establishment of the overvoltage during this preheating, and at the end, ensure the gradual increase in the amplitude of the pulse of the overvoltage applied to the fluorescent tube, until it reaches the value necessary for the lighting of this tube.
  • a choke according to the invention As shown in the single figure, a choke according to the invention, all of the components of which it is located inside a block 111 (shown in dotted lines), has two connection points A and B respectively.
  • a fluorescent tube 1, c intended to operate with this starter and comprising a first filament FI and a second filament F2 is mini of a ballast 2.
  • the filament F1 is connected by its pad P1 to connection A, and by its pad P2 to the end B1 of the ballast 2, the other end B2 of which is connected to the terminal 10 of one of the outputs of a supply network AC, represented by the rectangle 3.
  • the element F2 is connected, to the connection B by its pad P3, and by its pad P4, to the terminal 20 of the other output of the supply network 3.
  • connection A is connected to terminal Pt2 of a thermal protection element 5, the adorns Pt2 leads to the end E1 of the secondary winding.
  • the role of the thermal protection element 5 is to cut the circuit in case of prohibitive heating of the autotransformer -1 on which it is fixed; this element can be constituted by any known means, such as for example a bimetallic element whose cont and opens with the increase in its temperature.
  • the other end of the secondary winding S comes out on the intermediate socket E2, common to the secondary winding S and to the e only primary P, of which the other exit is at E3.
  • the transformation ratio of these two windings allows, starting from the signals generated in the primary winding P, to obtain by the secondary S the overvoltage necessary for the lighting of the fluorescent tube 1, overvoltage essential for the lighting of the small tubes. diameter.
  • the capacitor C2 is connected by one of its terminals to the winding P, at E3, and by its other terminal, on the one hand, to the anode of a single switching ogane which in the example given in the description according to the invention is a thyristor Th whose cathode is brought back to the intermediate tap E2, and on the other hand to the resistor R6, which by its other end, is connected to the cathode of the diode D1, and to resistance R7 mounted in parallel with this diode.
  • the anode of the diode D1 is also connected to the intermediate tap E2. All of these elements with the autotransformer T1 constitute the ignition overvoltage generator circuit of the fluorescent tube 1; resistor R6 is also used to avoid clipping of the overvoltage in the case of certain fluorescent tubes.
  • the capacitor C1 is connected, by its positive terminal to the intermediate socket E2, and by its negative terminal and the series resistor R5, to the anode of the diode D3, itself connected by its cathode to the resistor R8, l the other end of resistor R8 is connected to connection B.
  • the capacitor C1, the resistor R5 and the diode D3 constitute a timer circuit.
  • the zener diode D4, mounted in parallel with the resistor R3, has its anode connected to the negative terminal of the capacitor C1 and its cathode connected to the resistor R2, the other end of the resistor R2 is joined to the trigger G of the thyristor Th as well as resistor R4, the other terminal of which is connected to the intermediate prize E2.
  • the resistor R1 is connected on one side to the cathode of the diode D3, to the anode of the diode D2, to the resistor R8, and on the other side to the trigger G of the thyristor Th.
  • the resistors R8 and R1 constitute a first control channel of the thyristor Th, intended for establishing the overvoltage.
  • the diode D2 with a controlled avalanche, is connected by its cathode to the anode of the thyristor Th, as well as to the resistor R6 and to the capacitors C2, C3 and C4; the other armature of the capacitor C3 is joined to the cathode of the diode D4 and to the common point of the resistors R2 and R3.
  • the capacitor C4 connected by one of its terminals to the anode, and by the other to the trigger of the thyristor Th, is used to reset the latter which, without which risks being blocked during the oscillating discharge of the capacitor C2.
  • the circuit composed of the resistor R8, the diode D2, the capacitor C3 and the resistor R2 constitute a second control channel of the thyristor Th, intended for establishing preheating.
  • connection B When the positive alternation of the supply network occurs at connection B, the diode D2 becomes conductive, and from the start of this alternation, a positive pulse is transmitted by the resistor R8, the diode D2, the capacitor C3 and the resistor R2, to the trigger G of the thyristor Th to control the latter; the latter goes into the conducting state and gives rise to a current which is used to preheat the filaments F1 and F2.
  • This current mainly limited by the resistor R8 is unidirectional.
  • filament F2 resistor R8, diode D2, thyristor Th, secondary winding S, thermal protection element 5, filament F1, ballast 2 and is closed by the supply network 3.
  • the assembly consisting of the capacitor C2 and the primary P is short-circuited by the thyristor Th which thus prevents the charging of the capacitor C2 during the preheating of the filaments F1 and F2.
  • connection B With the reverse polarity of the network, negative alternation is applied to connection B; the thyristor Th is blocked, the diode D2 is no longer conductive, but the diode D3 on the other hand, becomes conductive and allows the passage of a current which is limited by the resistance R8 and the resistance R5, of which it is the role, partially charges the capacitor C1.
  • the latter then develops a negative voltage as a function of its charge, at the level of its negative armature; a fraction of this voltage is applied to the trigger G by the resistors R3 and R2, which form a voltage divider bridge with the resistor R4.
  • This negative voltage present on the trigger G serves as a reference to the positive pulses transmitted by the capacitor C3 for the control of the thyristor Th, and from certain values which this negative voltage will reach over time, the peak level of these pulses will no longer have the level necessary to cause the conducting state of the TH thyristor.
  • the capacitor C1 develops an increasing negative voltage with each negative alternation at connection B; this twnsion is applied, as already described above, to the trigger G, where it will reach the level necessary to prevent the transition to the conducting state of the thyristor Th under the control of the pulses transmitted by the capacitor C3 and the resistor R2.
  • Another characteristic of the invention resides in the fact that the variations of this negative voltage, when the latter reaches a sufficient level, are fully applied to the resistor R2, by means of a voltage regulating element at its terminals; this allows a clear transition to be made, between the moment when the pulses transmitted by the capacitor C3 and the resistor R2 at the trigger G, manage to trigger the conduction of the thyristor Th, and the moment when they no longer succeed.
  • the voltage regulating element at its terminals can be a any known means, such as for example a zener diode, as well as in this description where it is the diode D4.
  • a choke according to the invention also has another very advantageous characteristic in terms of the reduction of the components; this characteristic resides in the fact that, the preheating circuit and the overvoltage circuit, operate thanks to a single switching member which is common to them, and which in the example described is the thyristor Th.
  • This new characteristic of the present invention makes it possible to apply to a fluorescent tube 1, an overvoltage which gradually reaches the value necessary for its ignition.
  • the fluorescent tube 1 being on, its arc voltage present between connections A and B, is lower than that of the supply network 3, causing the choke to stop operating.
  • the capacitor C1 continues to charge, and determines on the trigger G a voltage level such that the thyristor Th is no longer triggered, hence the generation of overvoltage generations. ignition.
  • a choke according to the invention can ensure the lighting of any fluorescent tube, and this in particular in applications requiring a large number of ignitions.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (9)

1. Elektronischer Starter für Leuchtstofflampen mit einer Wechselstromquelle und bestehend aus:
a. einem Vorwärmstromkreis mit einer Serienschaltung aus zumindest
(1) den Wendeln der Lampe,
(2) einem mittels einer Steuerelektrode betätigten Schaltelement,
b. einer Verzögerungsschaltung mit einer Serienschaltung aus zumindest
(3) einer Anzahl eine Brückenschaltung bildender Widerstände zur Steuerung der genannten Elektrode,
c. einer Überspannungsschaltung mit einer Serienschaltung aus zumindest
(4) einem Überspannungskondensator,
(5) einem induktiven Element,

dadurch gekennzeichnet, dass
d. das Schaltelement einseitig gerichtet ist, und dass der Vorwärmstromkreis ebenfalls eine Serienschaltung enthält aus
(6) einer Diode, deren Durchlassrichtung gleich der des Schaltelements ist und zum Beschränken der Wirkung des Vorschaltkreises auf positive Halbperioden der Speisung entsprechend dem leitenden Zustand dieser Diode durch die Aufladung zumindest einer Kapazität in Serienschaltung mit einem mit der Steuerelektrode des Schaltelements verbundenen Widerstand dient,
e. die Verzögerungsschaltung ebenfalls einen Verzögerungskondensator in Serienschaltung mit der Speisequelle während der negativen Halbperioden und in Parallelschaltung mit mindestens einem Teil der Widerstandbrücke zum Anglegen einer immer negativer werdenen Spannung zur Steuerelektrode in den gesperrten Zeitabschnitten des Schaltelements und auf diese Weise zum progressiven Verzögern der Schliessung des Schaltelements im Laufe jeder positiven Halbperiode enthält,
f. die Überspannungsschaltung parallel zum Schaltelement angeordnet ist, damit sich vom Beginn der positiven Halbperioden der Überspannungskondensator in den länger werdenden Verzögerungszeiten hinsichtlich der Schliessung des Schaltelements auflädt und anschliessend bei der Schliessung dieses Schaltelements sich über das Schaltelement in das induktive element entlädt, das die Primärwicklung eines Autotransformators in Serienschaltung mit dem Vorwärmstromkreis ist.
2. Elektronischer Starter nach Anspruch 1, dadurch gekennzeichnet, dass das Schaltelement ein Thyristor (Th) ist.
3. Elektronischer Starter nach Anspruch 2, dadurch gekennzeichnet, dass die Verzögerungsschaltung im wesentlichen aus der Verknüpfung eines Kondensators (C1) mit einem Widerstand (R5) und einer Diode (D3) besteht, wobei eine progressiv ansteigende Spannung erzeugt wird.
4. Elektronischer Starter nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass die Steuerelektrode (G) des Thyristors (Th) über einen ersten Steuerweg, bestehend aus der Serienschaltung der Widerstände (R8) und (R1), und einen zweiten Steuerweg, bestehend aus einem Widerstand (R8), einer diode (D2), einem Kondensator (C3) und einem Widerstand (R2), verfügt.
5. Elektronischer Starter nach einem der Ansprüche 2, 3 und 4, dadurch gekennzeichnet, dass die Verzögerungsschaltung (C1, R5, D3) in Zusammenarbeit mit dem ersten Steuerweg des Thyristors (Th), bestehend aus den Widerständen (R1) und (R8), ermöglicht, dass der Thyristor (Th) mit den variablen Verzögerungen in bezug auf die Anfänge der positiven Halbperioden an der Klemme (B); für die Erzeugung der Überspannung in den leitenden Zustand übergeht.
6. Elektronischer Starter nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Verzögerungsschaltung (C1, R5, D3) in Zusammenarbeit mit dem zweiten Steuerweg des Thyristors (Th), bestehend aus dem Widerstand (R8), der Diode (d2), dem Kondensator (C3) und dem Widerstand (R2) ermöglicht, dass der Thyristor (Th) die Vorwärmung für eine bestimmte Zeit versorgt.
7. Elektronischer Starter nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass ein Kondensator (C2) eine jedesmal höhere Ladung vor der Entladung vom Thyristor (Th) erreicht, wodurch bei jeder seiner Entladungen eine Überspannung mit einem höheren Wert in bezug auf die vorangehenden Entladung erreicht wird.
8. Elektronischer Starter nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die Verzögerungsschaltung (C1, R5, D3) über die Widerstände (r3, R2, R4) in einem ersten Zeitabschnitt und über die gleichen Widerstände zusammen mit einem Regelelement für die Spannung an seinen Klemmen in einem zweiten Zeitabschnitt auf den Thyristor (Th) einwirkt.
9. Elektronischer Starter nach Anspruch 8, dadurch gekennzeichnet, dass das Regelelement für die Spannung an seinen Klemmen eine Zenerdiode (D4) ist.
EP82400510A 1981-04-03 1982-03-19 Elektronischer Starter für Fluoreszenzlampen, mit einem, mit einem Überspannungsschaltkreis und einem Vorwärmstromkreis zusammenwirkenden Zeitverzögerungsstromkreis Expired EP0063507B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400510T ATE25316T1 (de) 1981-04-03 1982-03-19 Elektronischer starter fuer fluoreszenzlampen, mit einem, mit einem ueberspannungsschaltkreis und einem vorwaermstromkreis zusammenwirkenden zeitverzoegerungsstromkreis.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106772A FR2503521A1 (fr) 1981-04-03 1981-04-03 Starter electronique pour tube fluorescent, comportant un circuit temporisateur cooperant avec un circuit de surtension et un circuit de prechauffage
FR8106772 1981-04-03

Publications (2)

Publication Number Publication Date
EP0063507A1 EP0063507A1 (de) 1982-10-27
EP0063507B1 true EP0063507B1 (de) 1987-01-28

Family

ID=9257004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400510A Expired EP0063507B1 (de) 1981-04-03 1982-03-19 Elektronischer Starter für Fluoreszenzlampen, mit einem, mit einem Überspannungsschaltkreis und einem Vorwärmstromkreis zusammenwirkenden Zeitverzögerungsstromkreis

Country Status (7)

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EP (1) EP0063507B1 (de)
AT (1) ATE25316T1 (de)
DE (1) DE3275345D1 (de)
ES (1) ES8303875A1 (de)
FR (1) FR2503521A1 (de)
MA (1) MA19430A1 (de)
PT (1) PT74682B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU83920A1 (fr) * 1982-02-03 1983-09-02 Jean Marie De Pra Dispositif de demarrage pour lampes a decharge
CN1311715C (zh) * 2002-06-18 2007-04-18 陈树煌 有保护装置的电子镇流器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411575A (en) * 1972-12-20 1975-10-29 Lampes Sa Two-terminal electronic starters for fluorescent lamps

Also Published As

Publication number Publication date
FR2503521B1 (de) 1984-05-04
FR2503521A1 (fr) 1982-10-08
PT74682B (fr) 1983-08-22
ES511049A0 (es) 1983-02-01
PT74682A (fr) 1982-04-01
EP0063507A1 (de) 1982-10-27
DE3275345D1 (en) 1987-03-05
ES8303875A1 (es) 1983-02-01
MA19430A1 (fr) 1982-12-31
ATE25316T1 (de) 1987-02-15

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