EP0063507A1 - 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
EP0063507A1
EP0063507A1 EP82400510A EP82400510A EP0063507A1 EP 0063507 A1 EP0063507 A1 EP 0063507A1 EP 82400510 A EP82400510 A EP 82400510A EP 82400510 A EP82400510 A EP 82400510A EP 0063507 A1 EP0063507 A1 EP 0063507A1
Authority
EP
European Patent Office
Prior art keywords
circuit
overvoltage
thyristor
preheating
switching element
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.)
Granted
Application number
EP82400510A
Other languages
English (en)
French (fr)
Other versions
EP0063507B1 (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
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes, Mazda Eclairage filed Critical Compagnie des Lampes
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

  • the invention relates to an electronic starter for fluorescent tube.
  • 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 an electronic starter at low cost and with reduced overall dimensions, which allows the lighting of any fluorescent tube in less than two seconds and without untimely beating.
  • an electronic starter for fluorescent tube connected by its two connection points A and B, to the filaments of the tube, comprising a preheating circuit, an overvoltage circuit, a timer circuit, is characterized in that this circuit timer cooperates with these first two circuits, via 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 finally , ensure the progressive increase of the overvoltage applied to the fluorescent tube, until it reaches the value necessary for lighting this tube.
  • a choke according to the invention As shown in the single figure, a choke according to the invention, of which all the components constituting it are located inside a block 111 (shown in dotted lines), has two connection points A and B respectively.
  • fluorescent tube 1 intended to work with.
  • this starter and comprising a first filament Flet a second filament F2, is provided with a ballast 2.
  • the filament FI is connected, by its pad Pl to the connection A, and by its stud P2 at the end BI of the ballast 2, the other end B2 of which is connected to terminal 10 of one of the outputs of an AC 220v supply network, represented by rectangle 3.
  • the filament F2 is connected, to connection B by its pad P3, and by its pad P4, at terminal 20 of the other output of the supply network 3.
  • connection A is connected to the terminal Ptl of a terhmic protection element 5 whose terminal Pt2 leads to the end El of the secondary winding.
  • the role of the thermal protection element 5 is to cut the circuit in the event of prohibitive heating of the autotransformer Tl on which it is fixed; this element may consist of any known means, such as for example a bimetallic element whose contact opens with the increase in its temperature.
  • the other end of the secondary winding S exits on the intermediate socket E2, common to the secondary winding S and to the primary winding P, the other outlet of which takes place 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.
  • 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 the 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 D5, and to the resistor R7 connected in parallel with this diode.
  • the anode of diode D5 is also connected to the intermediate socket E2. All of these elements with the autotransformer Tl constitutes 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; 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 socket E2.
  • the resistor RI 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 RI 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 resistance 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 FI and F2.
  • This current mainly limited by the resistor R8 is unidirectional.
  • filament F2 It circulates in the following elements: filament F2, resistor R8, diode D2, thyristor Th, secondary winding S, thermal protection element 5, filament FI, ballast 2 and is closed by the supply network 3.
  • the assembly consisting of the capacitor C2 and of 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 Flet F2.
  • connection B With the reverse polarity of the network, it is the negative half-wave which 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 resistor R8 and the resistor R5, of which it is the role, partially charges the capacitor CI.
  • 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 controlling 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 thyristor Th.
  • the capacitor CI develops an increasing negative voltage with each negative half-wave at connection B; this voltage 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 it 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 any known means, such as for example a zener diode, as well as in this description where it is the diode D4.
  • a starter 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.
  • the level of the overvoltage applied to the fluorescent tube 1 will increase, with a limit, until the lighting of the latter.
  • the negative voltage developed by the capacitor Cl continuing to increase, the time necessary to trigger the thyristor Th at each positive half-wave on the connection B also increases. This allows the capacitor C2 to reach each time a higher charge level before being discharged in the primary winding P, thereby causing each of its discharges to have a higher overvoltage level than at its previous discharge.
  • 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)
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
FR8106772 1981-04-03
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

Publications (2)

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

Country Link
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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002871A1 (en) * 1982-02-03 1983-08-18 Pra Jean-Marie De Ignition device for discharge lamps
CN1311715C (zh) * 2002-06-18 2007-04-18 陈树煌 有保护装置的电子镇流器

Citations (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

Patent Citations (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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002871A1 (en) * 1982-02-03 1983-08-18 Pra Jean-Marie De Ignition device for discharge lamps
EP0105042A1 (de) * 1982-02-03 1984-04-04 Jean-Marie De Pra Vorrichtung zum Zünden einer Entladungslampe
CN1311715C (zh) * 2002-06-18 2007-04-18 陈树煌 有保护装置的电子镇流器

Also Published As

Publication number Publication date
ES511049A0 (es) 1983-02-01
FR2503521B1 (de) 1984-05-04
PT74682B (fr) 1983-08-22
FR2503521A1 (fr) 1982-10-08
PT74682A (fr) 1982-04-01
DE3275345D1 (en) 1987-03-05
ES8303875A1 (es) 1983-02-01
EP0063507B1 (de) 1987-01-28
ATE25316T1 (de) 1987-02-15
MA19430A1 (fr) 1982-12-31

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