EP0471228B1 - Elektronisches Startgerät für Fluoreszenzlampen - Google Patents

Elektronisches Startgerät für Fluoreszenzlampen Download PDF

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Publication number
EP0471228B1
EP0471228B1 EP91112564A EP91112564A EP0471228B1 EP 0471228 B1 EP0471228 B1 EP 0471228B1 EP 91112564 A EP91112564 A EP 91112564A EP 91112564 A EP91112564 A EP 91112564A EP 0471228 B1 EP0471228 B1 EP 0471228B1
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
thyristor
current
semiconductor switching
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 - Lifetime
Application number
EP91112564A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0471228A1 (de
Inventor
Peter Horn
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.)
Knobel AG Lichttechnische Komponenten
Original Assignee
Knobel AG Lichttechnische Komponenten
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 Knobel AG Lichttechnische Komponenten filed Critical Knobel AG Lichttechnische Komponenten
Publication of EP0471228A1 publication Critical patent/EP0471228A1/de
Application granted granted Critical
Publication of EP0471228B1 publication Critical patent/EP0471228B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 starting device for fluorescent lamps according to the preamble of patent claim 1.
  • FIG. 1 of the present patent application shows a circuit example of such a starting device with a thyristor semiconductor switching element and voltage limiting element 3 called fluoractor.
  • the starting device with the rectifier 2, the fluorine actuator 3 and a further thyristor 4 is connected to the known lamp circuit with the lamp 1, the inductor L and the capacitor C.
  • the function of the known starting device can be briefly recapitulated on the basis of FIGS. 2a to 2d with the voltage profiles of the voltages U1 to U4 indicated in FIG.
  • the fluorine actuator 3 becomes conductive due to the rising voltage U3 at its control input.
  • the lamp current I L flows through the inductor L, the hot cathodes of the lamp 1, the rectifier 2 and the fluorine actuator 3.
  • the lamp 1 is preheated.
  • the rectified voltage U1 gradually charges the capacitor C1 of the starter.
  • the voltage U2 is ramp-shaped with a superimposed ripple (Fig. 2 b).
  • a predetermined voltage value of U2 which appears at a maximum of U1
  • the switching threshold of the thyristor 4 is reached and the control input of the fluorine actuator 3 is set to a low voltage value or zero potential.
  • the Fluoractor 3 is thus activated for blocking.
  • the actual blocking state is only reached later, however, since the fluoractor can only go into the blocking state when the current I L drops below a predetermined holding current I H determined by the fluoractor.
  • the current I L is interrupted, which leads to a high induced ignition voltage at the instant t Z as a result of the inductor L (FIG. 2 d).
  • the ignition voltage is limited to approx. 1500 volts by limiting diodes in the Fluoractor 3.
  • the holding current I H at which the lamp is ignited or the ignition point t Z is therefore not adjustable but is determined by the fluorine actuator. With large inductance values of the choke L (ie with small fluorescent lamps), this predetermined current can even lead to the destruction of the fluorine actuator.
  • GB-A-2 201 307 also makes reference to document EP-A-118 309 and, based on this prior art, it is proposed to effect the safe ignition of the lamp by a large number of high-voltage ignition pulses, the first ignition pulse in the Range of increasing current can be.
  • the circuit for generating a large number of ignition pulses is complex, which is disadvantageous in the case of a starting device, which should be very inexpensive.
  • EP-A-249 485 also teaches to provide a plurality of ignition pulses to cause the lamp to ignite. The same disadvantage arises as in GB-A-2 201 307.
  • the invention is therefore based on the object of providing an improved starting device of the type mentioned at the beginning, in which the ignition current or the ignition voltage can be set precisely and independently of the holding current. This should be possible in the simplest and cheapest possible way.
  • the control arrangement is designed as a thyristor connected in series with the fluororeactor, which is controlled by a voltage divider through which the lamp current I L flows.
  • FIG. 3 shows a starter device according to the invention, the same reference numerals denoting the same elements as in FIG. 1.
  • a voltage divider R1 / R2 and a thyristor 5 are connected in series with the fluoractor 3, the gate of which is controlled by the partial voltage at the voltage divider R1 / R2.
  • the function when applying the AC voltage to the lamp 1 is initially basically the same as in the known starting device.
  • the Fluoractor goes into the conductive state and the lamp 1 is preheated.
  • a voltage curve U1 results, however, as shown in FIG.
  • the thyristor 5 is not ignited. Therefore, the entire preheating current flows through resistor R2.
  • the switching threshold is reached at the gate of thyristor 5, at which thyristor 5 is ignited.
  • the size of the preheating current at which the thyristor 5 ignites and thus the time t x can be set.
  • Resistor R1 determines the level of voltage U x at the thyristor at point t x . Due to the voltage jump from U x to 1V at thyristor 5, a local maximum arises at the gate of thyristor 4 (U2, FIG. 4b) at time t x during each half period of the mains frequency. This local maximum has the effect that, after slowly charging the capacitor C1, the switching threshold at the gate of the thyristor 4 is reached at the time t x after the zero crossing of the preheating current at a predetermined size of the increasing preheating current.
  • the lamp After the lamp has been ignited, sufficient mains current is supplied to keep the lamp in the ionized state for as long as possible in the first mains period after the ignition.
  • the lamp is ignited after the maximum of the mains current and before its zero crossing, which shortens the duration of the ionization of the lamp in the first mains period.
  • the lamp can be switched on in the second network period after ignition tend to go out if the ionization of the lamp gas is only very short.
  • a capacitor C2 can be connected between the gate and cathode of the thyristor 4.

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  • Circuit Arrangements For Discharge Lamps (AREA)
EP91112564A 1990-08-16 1991-07-26 Elektronisches Startgerät für Fluoreszenzlampen Expired - Lifetime EP0471228B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2669/90 1990-08-16
CH2669/90A CH681263A5 (enrdf_load_stackoverflow) 1990-08-16 1990-08-16

Publications (2)

Publication Number Publication Date
EP0471228A1 EP0471228A1 (de) 1992-02-19
EP0471228B1 true EP0471228B1 (de) 1995-05-17

Family

ID=4238911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112564A Expired - Lifetime EP0471228B1 (de) 1990-08-16 1991-07-26 Elektronisches Startgerät für Fluoreszenzlampen

Country Status (4)

Country Link
EP (1) EP0471228B1 (enrdf_load_stackoverflow)
AT (1) ATE122840T1 (enrdf_load_stackoverflow)
CH (1) CH681263A5 (enrdf_load_stackoverflow)
DE (1) DE59105497D1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE151586T1 (de) * 1992-01-24 1997-04-15 Knobel Lichttech Elektronischer starter für fluoreszenzlampen
KR0152673B1 (ko) * 1992-09-29 1998-10-01 모리시타 요이찌 형광램프점등장치
BE1007611A3 (nl) * 1993-10-11 1995-08-22 Philips Electronics Nv Schakelinrichting.
WO2003103344A1 (en) * 2002-05-30 2003-12-11 Koninklijke Philips Electronics N.V. Starter
CN109188309B (zh) * 2018-10-15 2020-08-18 中国船舶重工集团公司第七0五研究所 一种高压起爆器检测电路的动态门限参数精确确定方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4503359A (en) * 1979-09-12 1985-03-05 Hitachi Lighting, Ltd. Discharge lamp lighting device
GB8614470D0 (en) * 1986-06-13 1986-07-16 Texas Instruments Inc Starter circuit
GB8703284D0 (en) * 1987-02-12 1987-03-18 Martin D J Electronic starter for fluorescent lamps

Also Published As

Publication number Publication date
EP0471228A1 (de) 1992-02-19
ATE122840T1 (de) 1995-06-15
DE59105497D1 (de) 1995-06-22
CH681263A5 (enrdf_load_stackoverflow) 1993-02-15

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