EP1968357B1 - Unité d'alimentation pour lampes à vapeur métallique - Google Patents

Unité d'alimentation pour lampes à vapeur métallique Download PDF

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Publication number
EP1968357B1
EP1968357B1 EP20080100552 EP08100552A EP1968357B1 EP 1968357 B1 EP1968357 B1 EP 1968357B1 EP 20080100552 EP20080100552 EP 20080100552 EP 08100552 A EP08100552 A EP 08100552A EP 1968357 B1 EP1968357 B1 EP 1968357B1
Authority
EP
European Patent Office
Prior art keywords
lamp
supply unit
switch
ignition
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.)
Not-in-force
Application number
EP20080100552
Other languages
German (de)
English (en)
Other versions
EP1968357A3 (fr
EP1968357A2 (fr
Inventor
Frank Friedrich
Stefan Reichel
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.)
Elektrobau Oschatz GmbH and Co KG
Original Assignee
Elektrobau Oschatz GmbH and Co KG
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 Elektrobau Oschatz GmbH and Co KG filed Critical Elektrobau Oschatz GmbH and Co KG
Publication of EP1968357A2 publication Critical patent/EP1968357A2/fr
Publication of EP1968357A3 publication Critical patent/EP1968357A3/fr
Application granted granted Critical
Publication of EP1968357B1 publication Critical patent/EP1968357B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
    • 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

Definitions

  • the invention relates to an improved supply unit for metal halide lamps.
  • Metal halide lamps in particular high-pressure discharge lamps, are frequently operated with a series reactor on the public supply network. Together with an ignition circuit for generating Hochnapsszündimpulsen for igniting the still cold lamp results in a robust and reliable way to operate such lamps.
  • faults can occur which can lead to an increase of the current and thus to an undue excessive heating of the operating device in the form of the series reactor. In this case, the device must be switched off.
  • a thermal switch for example in the form of a bimetallic switch is used, which is heated by the operating current of the metal halide lamp.
  • a supply unit for a discharge lamp is for example off EP 0 613 326 A1 known.
  • a choke is connected to a mains connection.
  • an ignition circuit for igniting the discharge lamp.
  • the supply unit also has a monitoring device. If the mains voltage drops so that the discharge lamp can no longer be operated and goes out, the discharge lamp is re-ignited over a time control without the necessity of having to completely disconnect the supply unit from the mains voltage beforehand.
  • the EP 1 528 577 A1 can be seen, one goes to Protection of the supply unit usable thermal switch eg from the DE 102 58 281 A1 out.
  • the thermal switch is integrated in a connection module there.
  • the thermal switch is very compact. Overall, this allows the design of space-saving supply units.
  • the thermal switch is triggered by various heat influences. On the one hand, it assumes the ambient temperature. On the other hand, it heats up according to the current flowing through it. It thus acts as a slow overcurrent protection and switches off for larger overcurrents. In the case of large overcurrents, however, the thermal switch can rapidly overheat, which can lead to the evaporation of contacts and the formation of an arc. This should be excluded, because in such a case, the supply unit damages.
  • the supply unit according to the invention is suitable for metal vapor high-pressure lamps and also sodium vapor lamps. It has, in addition to the usual components on a monitoring device that checks the supplied mains voltage at least before the ignition of the lamp or even during the ignition of the same, whether the mains voltage is within a specified voltage range. If this is not the case If this is the case, the generation of ignition pulses at the ignition circuit is prevented.
  • the still cold lamp is initially high impedance.
  • ignition pulses in the form of high voltage pulses, a gas discharge is initiated, so that the lamp heating current flow through the lamp comes to conditions.
  • a voltage set range for example, going from 180 volts to 240 volts, thereby laying the currents flowing through the lamp in an allowable range.
  • a network fault such as a zero-conductor fault
  • the ignition of the discharge lamp leads in such a case to currents that can lead to rapid overheating.
  • the thermo-breaker responds, although it can not always switch off the high currents occurring safely. If an arc occurs at the thermal switch, it may possibly last longer and destroy the supply unit.
  • the monitoring device must monitor whether the mains voltage is in a range of, for example, 0 volts to 240 volts. In the preferred case, however, ignition pulses are not generated even if the mains voltage falls below a lower limit, which is greater than 0, for example, 180 volts. This avoids that the discharge lamp is ignited at a mains voltage, which is not sufficient for safe operation of the lamp and would soon lead to re-extinguishing the lamp. When the lamp goes out again and again, it practically runs in continuous ignition mode and thus with increased wear. This too is prevented by the supply unit according to the invention.
  • the supply unit according to the invention has a throttle for limiting the lamp current.
  • This throttle may have a tap for generating ignition pulses. The tap is then connected to the ignition circuit.
  • a separate ignition transformer may be provided, which is connected in series with the throttle.
  • the monitoring device is connected to the ignition circuit, for example, to a corresponding deactivation input of the ignition circuit to disable it when an inadmissible mains voltage is detected. It is also possible to combine the monitoring device and the ignition device into a circuit block by internally passing a signal indicative of improper mains voltage from a circuit part constituting the monitoring device to a circuit part constituting the ignition circuit.
  • thermoswitch is connected in series with the choke.
  • the mains voltage is preferably tapped at a point lying in front of the thermal switch from the point of view of the mains connection and fed to the monitoring device.
  • the mains voltage can also be tapped across the discharge lamp, at least as long as the discharge lamp has not yet been ignited.
  • thermal switch is preferably a bimetallic switch in question. Preference is given to bimetal with Abschalthysteresis. If it has switched off, it cools down and can switch on again after some time. However, that does not happen Generation of ignition pulses as long as the inadmissible mains voltage state persists, so that the discharge lamp is not ignited but remains high-impedance and no current can flow through the lamp or the throttle and the thermal switch.
  • the monitoring circuit with a memory, for example a flip-flop or other memory means, which stores and maintains the blocking state.
  • the reset can be done for example by restarting an intermittently switched off mains voltage.
  • it may require external intervention, for example by resetting an EPROM.
  • the mains voltage monitoring is performed before and / or during the ignition of the lamp.
  • the voltage monitoring is performed continuously and not only the generation of ignition pulses is prevented in the presence of an error condition, but interrupted the current flow through the gas discharge lamp. This can be done either by a parallel to the gas discharge lamp switch is at least temporarily closed. Thus the discharge lamp goes out. If the switch is opened again, the discharge lamp would have to be re-ignited, but the ignition pulse generation is prevented as a result of the present overvoltage condition. Thus, the supply unit switches off safely in this case.
  • one of the discharge lamp connected in parallel switch can be connected in series with the discharge lamp and a semiconductor switch, at least for a short time is switched high impedance, when an overvoltage condition is detected and the lamp is thus turn off.
  • FIG. 1 a supply unit 1 is illustrated, which serves to supply a high-pressure metal vapor lamp with electric power.
  • the supply unit 1 according to FIG. 1 is at the same time ballast and ignitor. It is designed as 3- or 4-pole and has two network connections 3, 4 on the network side. These are connected to the electrical supply network, for example, an AC power supply with rated voltage 230 volts.
  • the supply unit On the lamp side, the supply unit has two Lampenan connections 5, 6, are connected to the leading to the metal vapor high pressure lamp lines.
  • the supply unit 1 has its own housing 7, which in all FIGS. 1 to 5 only symbolically indicated. In this housing, at least preferably, a compensation capacitor 8 is provided, which connects the network terminals 3, 4 with each other.
  • a compensation capacitor 8 is provided, which connects the network terminals 3, 4 with each other.
  • the Netzanchluss 4 is connected to the lamp terminal 6.
  • a thermal switch 9 and a throttle 10 are arranged in series between the mains connection 3 and the lamp connection 5.
  • the thermal switch 9 is normally closed. It opens when it reaches an opening temperature by exceeding a limiting current.
  • the thermal switch 9 is preferably designed as a bimetallic switch with switching hysteresis. For example, it can be housed in a terminal, as can be seen from the DE 102 58 281 A1 is known.
  • the throttle 10 is used in the circuit after FIG. 1 the current limit of the lamp current. It also serves to generate ignition pulses. For this purpose, it has between its ends a tap 11, to which an ignition circuit 12 is connected.
  • the ignition circuit 12 is in FIG. 1 exemplified in a simple variant.
  • two capacitors 13, 14, which in Series are switched.
  • the capacitor 13 branches off in front of the throttle 10 and leads via the capacitor 14 to a reference line 15, which in turn is in communication with the mains connection 4 and the lamp terminal 6.
  • a voltage-dependent switch for example in the form of a DIAC 16 or a SIDAC, leads to the junction of the capacitors 13, 14. If the voltage on the capacitor 13 exceeds a limit, the switch 16 becomes low-resistance and discharges the capacitor 13 across turns of the inductor 10 until its charge is used up and the switch becomes non-conductive again. This game repeats periodically to generate firing pulses.
  • a switch 17 is connected in series, which is normally closed. It serves to deactivate the ignition device 12 by a monitoring device 18, which is in operative connection with the switch 17 in order to open it as needed.
  • the monitoring device 18 serves to monitor the operating voltage applied to the supply unit 1. For this purpose, it is connected via corresponding lines, on the one hand, to the network connection 3 and, on the other hand, to the network connection 4.
  • the supply unit 1 described so far operates as follows:
  • the metal vapor high-pressure lamp 2 is cold and thus high impedance. If operating voltage is now applied to the mains connections 3, 4, the mains voltage is applied substantially unimpeded to the high-pressure metal-vapor high-pressure lamp 2. Now it will the ignition device 12 is active. If the voltage on the capacitor 13 exceeds the breakdown voltage of the DIAG or switch 16, the capacitor 13 discharges abruptly, whereby a sudden change in current occurs at the terminal 11. As a result, multiple Hochnapsszündimpulse be generated by means of the throttle 10 in each power half-wave, which lead to a gas discharge in the metal halide lamp 2.
  • the monitoring device 18 checks whether the mains voltage lies within a permissible range of, for example, 180 volts to 240 volts. If this is the case, the generation of ignition pulses is continued until the metal vapor high-pressure lamp 2 carries a current which becomes so high that the voltage at the terminal 11 for maintaining tilt oscillations in the tilting oscillation generator formed by the capacitor 13 and the DIAG 16 no longer sufficient.
  • the metal halide lamp 2 is in An antivirus peace over, where it draws increased current.
  • the heating operation leads to the heating of the metal vapor high-pressure lamp 2 until it goes into normal combustion operation. It then draws rated current. Now occurs when a lamp error, which leads to an increase in current, the thermal switch 9 is heated beyond its threshold and switches off. It is dimensioned so that it can easily switch off the operating current of the metal vapor high-pressure lamp 2.
  • the monitoring device 18 prevents the generation of ignition pulses. If, for example, a voltage of 400 volts is applied to the mains connections 3, 4, the Monitoring device 18 this immediately and opens the switch 17. The ignition device 12 can not generate ignition pulses. Consequently, although the increased mains voltage of, for example, 400 volts applied to the metal vapor high-pressure lamp 2. However, this is cold and non-conductive. Without ignition pulses, it can not carry any current. It thus does not come to a state in which an excessive current would flow through the thermal switch 9, which is not switched off by the thermal switch 9.
  • the monitoring device 18 may also be connected to the line between the thermal switch 9 and the throttle 10 instead of the mains connection 3. When switching on there is the same voltage as at the power connector 3. So nothing essential changes in function.
  • the monitoring device 18 can be connected to the lamp connection 5.
  • the metal vapor high-pressure lamp 2 has a high resistance, so that a voltage corresponding directly to the mains voltage is likewise applied to the lamp terminal 5.
  • the voltage monitoring must then be limited to the period before the generation of ignition pulses.
  • FIG. 2 illustrates a modified embodiment.
  • the supply unit 1 assumes the throttle 10 but not the function of generating ignition pulses.
  • a separate ignition transformer 19 is provided. This is connected to a control circuit 20 which contains both the ignition device 12 and the monitoring device 18.
  • FIG. 3 illustrates a further modification of the supply unit 1a as a supply unit 1b.
  • the monitoring device 18 here takes over the monitoring of the switching state of the thermal switch 9.
  • the monitoring device 18 is connected to both ends of the thermal switch 9. If he opens, a voltage drops over him, which is registered by the monitoring device 18. It can now block the monitoring of ignition pulses when re-closing the thermal switch 9. This feature prevents a too-aged or otherwise damaged metal vapor high-pressure lamp 2, which draws too large operating currents and thus leads to the thermal shutdown of the thermal switch 9 is ignited again after switching off.
  • the peel-off state may be stored in a memory module 21, for example in the form of a flip-flop or the like.
  • the reset of the memory module 21 can be done for example by switching off and on the operating voltage. But it is also possible to make the reset of a manual intervention, such as a lamp replacement or a remote control signal or other measures.
  • the embodiments described above monitor the mains voltage in particular before and during the ignition.
  • the following with reference to FIG. 4 described embodiment also allows the monitoring of the operating voltage and the timely shutdown of the supply unit 1c, even if the operating voltage runs out with ignited warm metal vapor high-pressure lamp 2 from the band of admissibility.
  • a switch 22 is provided, for example in the form of a TRIAC, which is connected in parallel with the metal vapor high-pressure lamp 2. Its ignition electrode 23 is connected to the monitoring device 18. If this detects an overvoltage condition at the power supply terminals 3, 4, it prevents, as explained above, the generation of ignition pulses. If it detects the overvoltage condition during normal combustion operation of the metal vapor high-pressure lamp 2, it gives at least one preferably several ignition pulses to the switch 22 in order to short-circuit at least one but preferably several mains half-waves of the voltage across the metal vapor high-pressure lamp 2.
  • the thermal switch 9 is still not responsive to the short-term overcurrent. If the switch 22 no longer receives ignition pulses, it becomes high-impedance. The extinguished metal vapor high-pressure lamp 2 is not ignited again, because the monitoring device 18, the ignition device 12 now blocks.
  • FIG. 5 Another embodiment of the invention is described by the supply unit 1d FIG. 5 educated. For the explanation thereof reference is made to the above description.
  • the throttle 10 may, as exemplified in FIG. 1 shown, also take over ignition function.
  • FIG. 3 and 4 illustrates a separate Zündübertrager be provided.
  • a monitoring of the opening of the thermal switch 9 accordingly FIG. 3 or 4 respectively. But this function can also be dispensed with.
  • the supply unit 1d allows, as the supply unit 1c, the monitoring of the mains voltage during normal operation of the metal vapor high-pressure lamp 2. This is connected in series with a semiconductor switch 24, which is at least briefly opened by the monitoring device 18, if they an overvoltage condition in the supply network after detects the ignition of the metal vapor high-pressure lamp 2. At the same time, in turn, the generation of ignition pulses is suppressed. If the metal vapor high-pressure lamp 2 has not yet ignited, the opening of the semiconductor switch 24 can be omitted.
  • FIG. 6 illustrates in simplified form a supply unit 1e, in which the switches 16 and 17 are combined to form a switch 25 in the form of an externally controlled switch, for example a TRIACs.
  • a switch 25 in the form of an externally controlled switch, for example a TRIACs.
  • This is connected on the one hand to ground and on the other hand via a series circuit of a capacitor 13 'and a coil 26 to the terminal 11 of the throttle 10.
  • the gate of the TRIAC is connected to the ignition device. To generate lamp ignition pulses, this ignition device gives ignition pulses to the gate. The emission of ignition pulses is inhibited if the monitoring device 18, as described above in connection with FIGS. 1 to 5 described, an impermissible state.
  • the advantage of this circuit is the absence of the separate switch 17. Otherwise, the above applies Description of the embodiments according to Fig. 1 to 5 corresponding.
  • a supply unit of a metal vapor high-pressure lamp is proposed to provide relief of the existing temperature-dependent switching circuit breaker monitoring device 18, which monitors the mains voltage. If the mains voltage assumes values at which the metal vapor high-pressure lamp 2 suffers (undervoltage) or carries currents which can no longer be reliably switched off by the temperature switch 9, the monitoring unit 18 prevents the generation of ignition pulses, ie it blocks the ignition device 12.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (6)

  1. Unité d'alimentation (1) pour lampes à vapeur métallique (2), en particulier des lampes à décharge à haute pression, pour l'amorçage et l'alimentation en courant des lampes (2) à partir d'un réseau,
    comprenant un dispositif de surveillance (18) qui contrôle la tension de réseau fournie, déjà avant ou pendant l'amorçage, pour savoir si la tension de réseau se situe dans une plage de tension définie,
    comprenant un circuit d'amorçage (12) qui est connecté au dispositif de surveillance (18) ou contient celui-ci, et qui n'est libéré pour la génération d'impulsions d'amorçage que si le circuit de surveillance de tension (18) a constate que la tension de réseau se situe dans la plage de tension définie,
    où la surveillance de la tension de réseau est effectuée par le dispositif de surveillance (18) même lorsque la lampe à vapeur métallique (2) est amorcée et chaude et, en présence d'un état de surtension, non seulement la génération d'impulsions d'amorçage est empêchée, mais le flux de courant à travers la lampe à décharge gazeuse est interrompu,
    comprenant un chemin de courant qui mène d'une entrée de réseau (3) à la lampe (2) et dans lequel est disposé le circuit d'amorçage (10, 12),
    comprenant une inductance (10), disposée dans le chemin de courant, pour le réglage du courant de lampe à une valeur souhaitée, et comprenant un interrupteur thermique (9) qui est monté en série avec l'inductance (10),
    comprenant un interrupteur de court-circuit (22) qui est monté en parallèle avec la lampe (2), ou un interrupteur à semi-conducteur (24) qui est monté en série avec la lampe (2),
    où l'interrupteur de court-circuit (22) est fermé au moins temporairement, ou l'interrupteur à semi-conducteur (24) est ouvert au moins temporairement, si le dispositif de surveillance (18) constate l'état de surtension lorsque la lampe à vapeur métallique (2) est amorcée et chaude.
  2. Unité d'alimentation selon la revendication 1, caractérisée en ce qu'un interrupteur thermique (9) est disposé dans le chemin de courant.
  3. Unité d'alimentation selon la revendication 2, caractérisée en ce que l'interrupteur thermique (9) est un interrupteur bimétallique.
  4. Unité d'alimentation selon la revendication 2, caractérisée en ce que le dispositif de surveillance (18), en plus de sa fonction de surveillance de la tension de réseau, surveille l'interrupteur thermique (9) et bloque la génération d'impulsions d'amorçage lorsque celui-ci s'est ouvert au moins une fois.
  5. Unité d'alimentation selon la revendication 4, caractérisée en ce que le blocage est maintenu jusqu'à la remise en circuit suivante de la tension de service.
  6. Unité d'alimentation selon la revendication 4, caractérisée en ce que le blocage est maintenu jusqu'à la réinitialisation suivante d'une EPROM du circuit d'amorçage (12).
EP20080100552 2007-03-08 2008-01-16 Unité d'alimentation pour lampes à vapeur métallique Not-in-force EP1968357B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710011245 DE102007011245B4 (de) 2007-03-08 2007-03-08 Versorgungseinheit für Metalldampflampen

Publications (3)

Publication Number Publication Date
EP1968357A2 EP1968357A2 (fr) 2008-09-10
EP1968357A3 EP1968357A3 (fr) 2012-09-26
EP1968357B1 true EP1968357B1 (fr) 2014-04-23

Family

ID=39493301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080100552 Not-in-force EP1968357B1 (fr) 2007-03-08 2008-01-16 Unité d'alimentation pour lampes à vapeur métallique

Country Status (3)

Country Link
EP (1) EP1968357B1 (fr)
DE (1) DE102007011245B4 (fr)
ES (1) ES2466042T3 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763044A (en) * 1986-01-23 1988-08-09 Hubbell Incorporated Start, hot restart and operating lamp circuit
US4949018A (en) * 1987-11-06 1990-08-14 Unicorn Electric Products High pressure sodium lamp starter controller
JP2587720B2 (ja) * 1990-10-19 1997-03-05 株式会社小糸製作所 車輌用放電灯の点灯回路
US5424617A (en) * 1993-02-26 1995-06-13 North American Philips Corporation HID lamp ignitor-timer with automatic reset for dips in line voltage
JP3174993B2 (ja) * 1995-05-12 2001-06-11 株式会社小糸製作所 放電灯点灯回路
JP3210570B2 (ja) * 1996-02-29 2001-09-17 株式会社小糸製作所 放電灯点灯回路
US6359396B1 (en) * 2000-04-28 2002-03-19 Philips Electronics North America Corporation Multiple-parameter control of lamp ignition
DE10258281B4 (de) 2002-12-13 2007-02-08 Vossloh-Schwabe Deutschland Gmbh Anschlusseinrichtung, insbesondere für elektrische Betriebsmittel
JP4030884B2 (ja) * 2003-01-22 2008-01-09 Ｎｅｃディスプレイソリューションズ株式会社 放電ランプ点灯用電源装置
DE10350617B3 (de) 2003-10-30 2005-06-30 Vossloh-Schwabe Deutschland Gmbh Versorgungseinheit für Leuchtmittel

Also Published As

Publication number Publication date
DE102007011245A1 (de) 2008-09-11
EP1968357A3 (fr) 2012-09-26
DE102007011245B4 (de) 2010-04-15
EP1968357A2 (fr) 2008-09-10
ES2466042T3 (es) 2014-06-09

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