EP0489747A1 - Schaltungsanordnung zum betrieb einer gasentladungslampe. - Google Patents
Schaltungsanordnung zum betrieb einer gasentladungslampe.Info
- Publication number
- EP0489747A1 EP0489747A1 EP90911282A EP90911282A EP0489747A1 EP 0489747 A1 EP0489747 A1 EP 0489747A1 EP 90911282 A EP90911282 A EP 90911282A EP 90911282 A EP90911282 A EP 90911282A EP 0489747 A1 EP0489747 A1 EP 0489747A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge lamp
- gas discharge
- voltage
- circuit arrangement
- ignition
- 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
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000037452 priming Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
-
- 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
Definitions
- the invention relates to a circuit arrangement for operating a gas discharge lamp according to the preamble of the main claim.
- an ignition circuit for a high pressure metal vapor discharge lamp is already known, in which an LC series circuit acts on the switchable primary winding of a transformer. This induces a high voltage in the secondary winding, which ignites the gas discharge lamp.
- the secondary winding of the transformer remains switched in the lighting circuit even after the gas discharge lamp has been ignited. This results in additional losses that heat up the igniter unnecessarily.
- the rate of rise of the ignition voltage pulses due to the inductors is relatively slow, as a result of which the immediate ignition, especially of a warm gas discharge lamp, is hindered.
- the LC series resonant circuit must also be tuned to resonance, which requires relatively closely tolerated, high-quality components which are correspondingly expensive.
- the circuit arrangement according to the invention with the characterizing features of the main claim has the advantage over the fact that the transformer is only actively connected to the gas discharge lamp during the ignition phase, so that the power loss of the circuit arrangement is very low.
- the rate of rise of the ignition voltage pulses is very high.
- the ignition energy stored in the transformer can be used for igniting the gas discharge lamp with almost no loss, so that in particular a warm gas discharge lamp can also be ignited safely.
- Such breakover diodes have a low residual current in the blocked state and are very low-resistance when they break into the conductive state.
- Another advantage is that the ignition is monitored by means of a light sensor. As long as the lamp is not on, the light sensor controls the control circuit to generate new ignition pulses. After the gas discharge lamp has been ignited, the light sensor suppresses the generation of further ignition pulses.
- the signal from the light sensor can advantageously be used to monitor the lamp circuit, regulate the lamp power or the light intensity or to switch off the cooking voltage. This is particularly advantageous for safety reasons when changing the lamp.
- Another advantage is the fact that the ignition coil of the motor vehicle engine is used instead of the transformer. As a result, existing components are used several times, so that the construction of the circuit is very inexpensive.
- the use of a gas discharge lamp in a motor vehicle headlight is also favorable. Since the ignition is guaranteed even when the lamp is warm, the lamp can also be used as a flasher.
- ballast is connected upstream of the ballast to support the ignition process, and its boiling voltage is decoupled from the generator with a diode.
- a particularly simple circuit arrangement results if a second generator is used instead of the transformer.
- FIG. 1 shows a first embodiment
- FIG. 2 shows a second embodiment
- FIG. 3 shows a third embodiment
- FIG. 4 shows a fourth embodiment.
- a gas discharge lamp 1 is connected to the voltage output of an AC voltage generator 2 via the series connection of a ballast 4 and a capacitor 3, the firing circuit 10 of the circuit arrangement.
- the alternating voltage generator 2 is connected with its second output to the second electrode of the gas discharge lamp 1, which is continued as a ground line.
- a series circuit is arranged in parallel with the gas discharge lamp 1 and has a voltage-controlled switch 5, the secondary winding 12 of a transformer 7 and a controlled switch 9.
- the primary winding 11 of the transformer 7 is connected by its one connection to the switched side of the secondary winding and by its second connection to a first output 13 of a control circuit 6.
- the control circuit 6 has a second output 14, which is led to the control input of the controlled switch 9, which is expediently designed as a semiconductor switch is.
- the control circuit 6 is controlled by a light sensor 8, the arrangement of which is selected such that it can detect the ignition of the gas discharge lamp 1. This part of the circuit is called
- Pulse ignition part called.
- the voltage supply to the light sensor 8, the control circuit 6 and the generator 2 takes place via common lines which are formed by the connections 15 and 16.
- the circuit arrangement essentially has two circuits for the operation of the gas discharge lamp.
- the first circuit is formed by the generator 2, the capacitor 3 and the ballast 4 in connection with the gas discharge lamp 1.
- the generator 2 supplies the operating voltage necessary to maintain the burning operation of the gas discharge lamp 1.
- the necessary operating voltage is e.g. 60 to 120 volts.
- the operating frequency of the generator 2 is advantageously in the kilo-Hz range, because this makes the components and the generator smaller and less expensive to manufacture, and additionally the luminous efficacy of the gas discharge lamp in it
- Frequency range is particularly large.
- the lamp is connected in parallel to an ignition circuit which essentially has the voltage-controlled switch 5, the transformer 7 and the controlled switch 9.
- the control circuit 6 is provided, which can be activated via the light sensor 8.
- the control circuit 6 contains switching elements,
- the switch 9 is first closed, so that the primary winding 11 of the transformer 7 can charge via the first output of the control circuit 6. After charging, the switch 9 is opened so that a voltage is induced in the secondary winding 12. With a suitable transmission ratio of the two windings, the induced voltage for igniting the gas discharge lamp 1 is sufficiently high.
- the voltage-controlled switch 5 is initially blocked when the voltage is low. If the induced voltage rises above the threshold value of the switch 2, then it becomes practically abruptly conductive, so that a high voltage amplitude is available at the combustion electrodes for igniting the gas discharge lamp.
- a breakover diode was used as voltage-controlled switch 5.
- Toggle diodes have the advantage that they are very high-resistance below their threshold voltage, which is adapted to the ignition voltage requirement of the lamp and is, for example, 20,000 volts, so that the losses caused by leakage currents are very low. If the threshold voltage is exceeded, the breakover diode becomes very low-resistance so that it can transmit the energy stored in the transformer 7 to the gas discharge lamp 1. Here, the gas discharge lamp 1 is switched on by the ballast 4
- the capacitor 3 is provided to support the ignition process in the combustion circuit. Since the capacitor 3 is further charged with each unsuccessful attempt to ignite, it can also transfer its energy to the hot electrode of the gas discharge lamp via the ballast during the ignition process and support the successful last attempt to ignite. In particular in the case of a warm gas discharge lamp, this also supports safe ignition and promotes the coupling of the lighting circuit.
- the generator 2 can also be followed by a diode 42, of which a capacitor 41 can be connected to a connecting terminal 15, 16, preferably to ground (see FIG. 4).
- the ignition circuit was dimensioned in such a way that a single ignition pulse has about a few microseconds. If this pulse was not sufficient to ignite the lamp, then further ignition pulses are generated, with the voltage at the capacitor 3 and at the gas discharge lamp 1 continuously increasing with each ignition pulse.
- the charging voltage of the capacitor 3 is determined by the ignition energy transmitted by the voltage-controlled switch 5 during the ignition process. The charging voltage of the capacitor 3 is increased continuously since the capacitor was not discharged if the ignition attempt was unsuccessful.
- the control circuit 6 keeps the switch 9 open, so that the primary winding 11 of the transformer 7 is prevented from being recharged.
- the voltage-controlled switch 5 returns, as after each ignition pulse, to its high-resistance state and thus decouples the ignition circuit from the gas discharge lamp 1.
- the 3running operation is now maintained by the generator 2.
- the ballast 4, in conjunction with the capacitor 3, limits the current, since the gas discharge lamp 1 has a low resistance during the burning process.
- a resonance tuning between the capacitor 3 and the ballast 4, which is necessary in known ignition circuits, is not necessary here.
- ignition coils or corresponding transformers of a motor vehicle engine can also be provided.
- control circuit 66 As a light sensor 8, photo transistors or photo resistors can be used. They recognize the optical radiation from the gas discharge lamp 1 and emit a corresponding electrical signal which can be used to control the control circuit 6.
- the control circuit 66 also has switching devices, for example comparators for current measurement, which, in the event of a missing gas discharge lamp 1 or a short circuit in the lines, cause an unwanted ignition
- control circuit 6 can regulate the combustion current of the gas discharge lamp in a light-dependent manner.
- a thyristor or a spark gap can also be used as a voltage-controlled switch.
- spark gaps have the disadvantage that they emit high levels of interference, which may be undesirable, and they are also subject to wear.
- the use of a breakover diode has the advantage that when the breakover voltage is reached, the breakover diode is sufficiently fast, i.e. changes to the conductive state within a few nanoseconds.
- breakover diodes have already been proposed in patent application EP 88/00456.
- FIG. 2 A second exemplary embodiment of the circuit arrangement is shown in FIG. 2.
- the control of the transformer 7 is changed here.
- the primary winding 11 of the transformer 7 is preceded by a second capacitor 20 which is charged via a diode 21 from the output 13 of the control circuit 6.
- a switch 9 is connected to ground between the capacitor 20 and the diode 21. After the capacitor 20 has been charged, this switch 9 is closed via the output 14 of the control circuit 6, as a result of which the ignition voltage is induced in the secondary winding 12 of the transformer 7. After reaching the breakover voltage, the voltage-controlled switch 5 becomes conductive and very quickly transmits the energy stored in the transformer 7 to the gas discharge lamp 1.
- the circuit arrangement is dimensioned such that the capacitor 3 can receive several charging pulses until the ignition voltage for the gas discharge lamp 1 is reached. After the ignition, the generator 2 takes over the energy supply for the Gas discharge lamp 1 while the transformer 7 remains switched off.
- a high-voltage generator 30 for example an ignition transformer, which charges a capacitor 32, which can be connected in parallel to the gas discharge lamp 1 via the voltage-controlled switch 5, via a diode 31.
- the energy stored in the capacitor 32 switches through the controllable switch 5 for igniting the gas discharge lamp 1 when the breakover voltage is reached.
- the proposed exemplary embodiments can also be operated on a DC voltage network if the available DC voltage, for example from the battery of a motor vehicle, is clocked to generate a pulsed cooking voltage.
- a DC voltage network if the available DC voltage, for example from the battery of a motor vehicle, is clocked to generate a pulsed cooking voltage.
- Such chopper circuits are known and need not be described in detail.
- the generator 2 can be replaced by a battery.
- the capacitor 3 is to be replaced by a capacitor connected to ground.
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3929029 | 1989-09-01 | ||
DE3929029A DE3929029A1 (de) | 1989-09-01 | 1989-09-01 | Schaltungsanordnung zum betrieb einer gasentladungslampe |
PCT/DE1990/000600 WO1991003919A1 (de) | 1989-09-01 | 1990-08-04 | Schaltungsanordnung zum betrieb einer gasentladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0489747A1 true EP0489747A1 (de) | 1992-06-17 |
EP0489747B1 EP0489747B1 (de) | 1995-11-08 |
Family
ID=6388408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90911282A Expired - Lifetime EP0489747B1 (de) | 1989-09-01 | 1990-08-04 | Schaltungsanordnung zum betrieb einer gasentladungslampe |
Country Status (10)
Country | Link |
---|---|
US (1) | US5367227A (de) |
EP (1) | EP0489747B1 (de) |
JP (1) | JPH05500727A (de) |
KR (1) | KR920704546A (de) |
AU (1) | AU630487B2 (de) |
BR (1) | BR9007620A (de) |
CZ (1) | CZ281990B6 (de) |
DE (2) | DE3929029A1 (de) |
ES (1) | ES2080150T3 (de) |
WO (1) | WO1991003919A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4117288A1 (de) * | 1991-05-27 | 1992-12-03 | Hella Kg Hueck & Co | Hochspannungs-zuenduebertrager zum zuenden und betreiben von wechselstrom-hochdruck-gasentladungslampen in kraftfahrzeugen |
DE4117589A1 (de) * | 1991-05-29 | 1992-12-03 | Hella Kg Hueck & Co | Vorschaltgeraet fuer hochdruck-gasentladungslampen in kraftfahrzeugen |
DE4127970C1 (de) * | 1991-08-23 | 1992-10-01 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
ITVR940055U1 (it) * | 1994-09-14 | 1996-03-14 | Apparecchiatura per lampade a scarica, con accensione e riaccensione istantanea con lampada calda, particolarmente per lampade illuminazio | |
US5449980A (en) * | 1994-09-15 | 1995-09-12 | General Electric Company | Boosting of lamp-driving voltage during hot restrike |
IL121819A (en) * | 1997-09-22 | 2003-12-10 | Elop Electrooptics Ind Ltd | Circuit arrangement for igniting gas discharge flash tubes |
US6873110B2 (en) * | 2002-10-02 | 2005-03-29 | Chin-Fa Yen | Hid single light emitting point lamp tube switching device for switching lamp tube in positions of far light and near light and the method of the same |
NO20053519L (no) * | 2005-07-18 | 2007-01-19 | Thia Medica As | Anvendelse av forbindelser som omfatter fettsyrer |
US7456583B2 (en) * | 2006-09-05 | 2008-11-25 | General Electric Company | Electrical circuit with dual stage resonant circuit for igniting a gas discharge lamp |
US7460379B2 (en) * | 2006-09-05 | 2008-12-02 | General Electric Company | Electrical circuit with voltage multiplier for facilitating ignition of a gas discharge lamp |
DE102008004787A1 (de) * | 2008-01-17 | 2009-07-23 | Bag Electronics Gmbh | Zündgerät mit zwei Eingangspolen |
US9544970B2 (en) * | 2012-12-21 | 2017-01-10 | Tridonic Gmbh & Co Kg | Detection of an LED module |
DE102016120672B4 (de) * | 2016-10-28 | 2018-07-19 | Heraeus Noblelight Gmbh | Lampensystem mit einer Gasentladungslampe und dafür angepasstes Betriebsverfahren |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092565A (en) * | 1976-11-22 | 1978-05-30 | General Electric Company | Pulse circuit for gaseous discharge lamps |
AT369609B (de) * | 1980-09-11 | 1983-01-25 | Elger Elektro Neon | Schaltungsanordnung fuer den betrieb von gasentladungslampen |
US4890041A (en) * | 1988-03-10 | 1989-12-26 | Hubbell Incorporated | High wattage HID lamp circuit |
US5021716A (en) * | 1990-05-18 | 1991-06-04 | Gte Products Corporation | Forward inverter ballast circuit |
-
1989
- 1989-09-01 DE DE3929029A patent/DE3929029A1/de not_active Ceased
-
1990
- 1990-08-04 DE DE59009861T patent/DE59009861D1/de not_active Expired - Fee Related
- 1990-08-04 ES ES90911282T patent/ES2080150T3/es not_active Expired - Lifetime
- 1990-08-04 JP JP2510496A patent/JPH05500727A/ja active Pending
- 1990-08-04 EP EP90911282A patent/EP0489747B1/de not_active Expired - Lifetime
- 1990-08-04 AU AU60528/90A patent/AU630487B2/en not_active Ceased
- 1990-08-04 KR KR1019920700434A patent/KR920704546A/ko active IP Right Grant
- 1990-08-04 WO PCT/DE1990/000600 patent/WO1991003919A1/de active IP Right Grant
- 1990-08-04 BR BR909007620A patent/BR9007620A/pt unknown
- 1990-08-21 CZ CS904074A patent/CZ281990B6/cs unknown
-
1992
- 1992-02-21 US US07/840,731 patent/US5367227A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9103919A1 * |
Also Published As
Publication number | Publication date |
---|---|
CS407490A3 (en) | 1992-01-15 |
DE3929029A1 (de) | 1991-03-07 |
BR9007620A (pt) | 1992-07-07 |
US5367227A (en) | 1994-11-22 |
JPH05500727A (ja) | 1993-02-12 |
WO1991003919A1 (de) | 1991-03-21 |
KR920704546A (ko) | 1992-12-19 |
CZ281990B6 (cs) | 1997-04-16 |
ES2080150T3 (es) | 1996-02-01 |
DE59009861D1 (de) | 1995-12-14 |
EP0489747B1 (de) | 1995-11-08 |
AU630487B2 (en) | 1992-10-29 |
AU6052890A (en) | 1991-04-08 |
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