EP2399429A1 - Appareil électronique de fonctionnement pour une lampe à décharge dans un gaz - Google Patents

Appareil électronique de fonctionnement pour une lampe à décharge dans un gaz

Info

Publication number
EP2399429A1
EP2399429A1 EP10704914A EP10704914A EP2399429A1 EP 2399429 A1 EP2399429 A1 EP 2399429A1 EP 10704914 A EP10704914 A EP 10704914A EP 10704914 A EP10704914 A EP 10704914A EP 2399429 A1 EP2399429 A1 EP 2399429A1
Authority
EP
European Patent Office
Prior art keywords
lamp
voltage
inverter
current
bridge
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.)
Withdrawn
Application number
EP10704914A
Other languages
German (de)
English (en)
Inventor
Joachim MÜHLSCHLEGEL
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2399429A1 publication Critical patent/EP2399429A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2887—Static converters especially adapted therefor; Control thereof characterised by a controllable bridge in the final stage
    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to an electronic operating device for a gas discharge lamp with a DC-DC converter having a power factor correction circuit, and an inverter having a lamp inductor and a full bridge with two separately controllable half-bridges.
  • the invention is based on an electronic control gear for a gas discharge lamp with a DC-DC converter having a power factor correction circuit, and an inverter having a lamp inductor and a full bridge with two separately controllable half-bridges, according to the preamble of the main claim.
  • Fig. 1 shows the previous concept of an electronic control gear according to the prior art. This consists of three stages: In a first stage, which includes the DC-DC converter, the input AC voltage is set to a so-called intermediate circuit voltage U z ⁇ of 400V.
  • the intermediate circuit voltage U z ⁇ is a DC voltage, which is usually supported by a DC circuit capacitor.
  • the DC-DC converter operates in a special mode, so that it simultaneously performs the function of a power factor correction circuit.
  • the DC-DC converter can be designed, for example, as a flyback converter, Sepie or Cukwandler.
  • the DC voltage of 400V is reduced to a low-frequency AC voltage equal to the lamp voltage in a subsequent second stage, which has a half-bridge inverter.
  • the frequency of the alternating voltage is usually between 50 and 500 Hz.
  • the ignition stage normally consists of a superimposed ignition device, which superimposes a high ignition voltage on the output voltage of the inverter.
  • the ignition voltage of the superimposed ignition device consists of individual ignition pulses, which are generated until an electrical breakdown takes place in the burner of the gas discharge lamp.
  • the deep-setting half-bridge in the inverter operates in a lopsided mode. This allows a complete discharge of the energy storage and thus minimizes the switching losses.
  • the lamp inductor is used.
  • a significant Rippeistrom created by the energy storage so that the inverter thus generates an AC voltage low frequency to which a high-frequency AC voltage is aufmoduliert.
  • the ribs stream through the energy Memory is three-cornered by full charge / discharge and produces a similar ripple voltage across the AC output voltage of the inverter. Since this high-frequency ripple voltage can excite acoustic resonances in the burner vessel, it is undesirable and must be filtered in front of the lamp.
  • an electronic control gear for a gas discharge lamp comprising: - a DC-DC converter, with a power factor correction circuit,
  • the DC-DC converter additionally has the function of aricserstungsSetzung, and
  • the inverter additionally has the following functions: - a lamp current control,
  • This circuit topology can be used very inexpensively, since an ignition stage with an ignition transformer and high component costs due to the DC link voltage can be saved.
  • the DC-DC converter is preferably designed to lower the input voltage to a DC link voltage of 160V-250V. By this measure significantly cheaper components can be used, since a technology-related voltage limit is below in semiconductor devices.
  • the inverter preferably has a lamp choke and a resonant capacitor, wherein the resonant choke is designed as an autotransformer whose center tap is connected to the resonant capacitor.
  • This arrangement provides an effective resonant circuit for the ignition of the lamp. If the current flow through the resonant capacitor by means of a switch which is connected to the resonant capacitor, the switch is switched on during the ignition and acceptance of the lamp, and then turned off when the lamp is burned and in the nominal operation of the lamp, then a Effective and safe operation of the circuit arrangement can be ensured because the resonant circuit is interrupted in rated operation.
  • a DC link capacitor is preferably arranged, which leads during operation aistsripple, wherein the AC voltage generated by the inverter is synchronized with theistsripple.
  • the inverter is synchronized to the frequency of the voltage ripple so that the alternating voltage always commutes in the region of the maximum of the voltage ripple.
  • the lamp flow is preferably rectangular, and the height of the Lamp current is preferably adjusted so that the instantaneous lamp power is the same in the positive quadrant of the lamp current as in the negative quadrant of the lamp current.
  • the duty cycle of the lamp current is adjusted so that the average lamp power in the positive quadrant of the lamp current is the same as in the negative quadrant of the lamp current.
  • the full bridge is preferably operated so that it is divided into two half-bridges, wherein during operation of the gas discharge lamp, the first half-bridge is driven with a high-frequency pulse width modulated voltage, and the second half-bridge with a low-frequency rectangular voltage.
  • a low-frequency AC voltage and a deep-set operation can be realized with a full bridge.
  • both half-bridges are driven with a high-frequency voltage at the start of the lamp.
  • FIG. 2 shows a schematic block diagram of an electronic operating device according to the invention
  • Fig. 3 is a schematic diagram of an inverter according to the invention in a first embodiment.
  • FIG. 4 shows a schematic circuit diagram of an inverter according to the invention in a second embodiment.
  • FIG. 2 shows a schematic block diagram of an electronic operating device according to the invention.
  • the electronic control gear according to the invention has only two stages.
  • the first stage which includes the DC-DC converter
  • the AC input voltage is converted into an intermediate circuit voltage U z ⁇ of about 180V.
  • the DC-DC converter in addition to the power factor correction a deep-setting function, since he, for example, the rectified 220V AC voltage of ⁇ 325V to a DC link voltage U z ⁇ of ⁇ 180V decreases.
  • the intermediate circuit voltage U z ⁇ is converted into a low-frequency AC voltage.
  • Half bridge of the inverter full bridge works as a buck converter, the intermediate circuit voltage U z ⁇ downsized to the amount of smaller lamp voltage.
  • the other half-bridge of the full bridge works with a low-frequency alternating voltage.
  • a low-frequency alternating voltage is generated, which is reduced by the deep-setting half-bridge to the amount of lamp voltage. Since the intermediate circuit voltage U z ⁇ is already quite low, the inverter is constructed as a full-bridge arrangement.
  • FIG. 20 A schematic circuit diagram of the full-bridge arrangement in a first embodiment is shown in FIG.
  • the intermediate circuit voltage U z ⁇ which serves as an input voltage here, is supported by a DC link capacitor C1 .
  • a first half-bridge 110 has the MOS-FETs Tl and T2. Parallel to the MOS-FETs in each case a free-wheeling diode is connected. This has better electrical properties compared to the free-wheeling diodes installed in the MOS-FETs. These are advantageous in this half-bridge 110, since it assumes the deep-setting function and consequently is driven at a high frequency.
  • a lamp inductor L is connected, which also serves as a Tiefsetzerdrossel.
  • the gas discharge lamp 5 is connected.
  • the second half-bridge 120 is connected with its center.
  • the second half-bridge 120 has the MOS-FETs T3 and T4. These transistors are responsible for generating the low-frequency AC voltage which is applied to the gas discharge lamp 5. As mentioned above, they reverse the current direction through the gas discharge lamp 5 in a low-frequency cycle. For this task are the free-wheeling diodes integrated in the MOS-FETs are sufficient. For this reason, no freewheeling diodes are connected in parallel to the MOS FETs of the half bridge 120.
  • An ignition capacitor C L is connected in parallel to the gas discharge lamp 5.
  • the deep-setting half-bridge 110 operates in the circuit arrangement according to the invention during startup of the lamp and especially when the lamp has started up, ie when the lamp is in the nominal operating point, in non-leaking operation, in which the lamp inductor L functioning as a step-down inductor is not completely discharged in one cycle.
  • This has the disadvantage of increased switching losses, but at the same time the advantage of a significantly smaller Stromrippeis by the reduced depth of discharge of the lamp inductor L. By this much smaller current ripple a filter capacitor can be completely eliminated, the capacitor is thus only used as a starting capacitor for a resonance ignition.
  • the deep-setting half-bridge 110 preferably operates with a quadrant-selective current regulation, which keeps the lamp power equal during the positive half-wave and during the negative half-wave.
  • the power is regulated at each operating point to a predetermined power. This requires a fast current control, which can regulate the pulse width modulation as a function of the instantaneous lamp voltage.
  • the lamp power is controlled only over an entire half cycle, so that a simpler slower control can be used, which is cheaper to implement.
  • freewheeling diodes with correspondingly low reverse voltage can be used, which have significantly better properties with respect to their electrical behavior than higher-blocking types which must be used in the prior art.
  • Low-blocking diode types are significantly faster and have a significantly softer recovery behavior, which in turn further improves the electromagnetic compatibility and even more compensates for the disadvantage of hard switching.
  • Schottky diodes are also commercially available, which have even better properties and further increase the advantages of the inventive design.
  • the deep-setting half-bridge 110 In order to ignite the gas discharge lamp 5, the deep-setting half-bridge 110 is excited with the resonant frequency of a resonant circuit consisting of the lamp inductor L and of the filter capacitor C L. The voltage applied to the filter capacitor C L oscillates through the resonance to a height which results in an electrical breakdown in the gas discharge lamp burner of the gas discharge lamp 5.
  • the drive frequency of the deep-setting half-bridge 110 By skillful control of the drive frequency of the deep-setting half-bridge 110, the voltage on the gas discharge lamp after its ignition can be increased in order to achieve a better starting behavior of the gas discharge lamp.
  • the deep-setting half-bridge is controlled so that it performs the Stromregelnde function and thus the gas discharge lamp is operated with a power control.
  • FIG. 26 A schematic circuit diagram of the full-bridge arrangement in a second embodiment is shown in FIG. This embodiment is similar to the first embodiment, therefore, only the differences from the first embodiment will be explained.
  • the full bridge of the second embodiment instead of the parallel to the lamp connected firing capacitor C L, a series circuit of a resonant capacitor C R and a switch S.
  • This series circuit is connected by a center tap of the lamp or resonance inductor L, which is designed as an autotransformer , to the negative input voltage U z ⁇ .
  • the switch S is now closed before the start of the ignition, so that a current path and to give a resonant circuit of the lamp inductor L and the resonant capacitor CR.
  • the switch After the gas discharge lamp has been ignited, the switch is left in the closed state for a short time in order to apply a higher transfer voltage generated by the resonance overshoot to the gas discharge lamp.
  • the phase of the gas discharge lamp is referred to here, in which shortly after the electrical breakdown in the lamp burner, the burning voltage is still very low, and the electrodes are still very cold. Due to the cold electrodes in the acquisition phase, the gas discharge lamp requires a lot of voltage in order not to go out with the next current commutation.
  • the switch S When the acquisition phase is completed, and the electrodes of the gas discharge lamp have a sufficiently high voltage, the switch S is opened, and the current path is interrupted.
  • the switch remains open during the entire run-up, ie the time during which the gas discharge lamp is not yet operated at its nominal power. Even at the rated operating point at which the lamp is operated at its nominal power, the switch S remains open, and is closed again only after a lamp extinguishment to ignite the gas discharge lamp.
  • the operating device according to the invention is particularly suitable for operating mercury-free high-pressure discharge lamps, since it offers significant advantages over the prior art: •
  • the switching frequency of the half-bridge can be freely selected, as it is hard-wired in non-gap operation. This is a significant advantage to the usual lopsided operation, in which the frequency can not be freely selected, since the frequency results from the ZCS condition (Zero Current Switching).
  • ZCS condition Zero Current Switching
  • the first stage which operates as a power factor correction circuit, can be designed as a pure buck converter (Bück Converter).
  • Bück Converter buck converter
  • the operating device according to the invention can be omitted a complete stage for the operation of a gas discharge lamp, and the costs are thus significantly reduced.
  • the fact that the deep-setting half-bridge is operated in the non-latching mode and the filter capacitor can be very small, the component costs for an additional ignition stage can be saved.

Abstract

L'invention concerne un appareil électronique de fonctionnement pour une lampe à décharge dans un gaz comprenant : un convertisseur continu-continu, doté d'un circuit correcteur du facteur de puissance, d'un onduleur, d'un piège de lampe, et d'un pont intégral pourvu de deux demi-ponts distincts à commande d'amorçage. Le convertisseur continu-continu présente en outre la fonction d'abaissement de tension, et l'onduleur présente en outre les fonctions supplémentaires suivantes : régulation du courant de la lampe, fonction d'abaissement de tension de la lampe et allumage à résonance.
EP10704914A 2009-02-20 2010-01-29 Appareil électronique de fonctionnement pour une lampe à décharge dans un gaz Withdrawn EP2399429A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009009892A DE102009009892A1 (de) 2009-02-20 2009-02-20 Elektronisches Betriebsgerät für eine Gasentladungslampe
PCT/EP2010/051043 WO2010094543A1 (fr) 2009-02-20 2010-01-29 Appareil électronique de fonctionnement pour une lampe à décharge dans un gaz

Publications (1)

Publication Number Publication Date
EP2399429A1 true EP2399429A1 (fr) 2011-12-28

Family

ID=42234492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10704914A Withdrawn EP2399429A1 (fr) 2009-02-20 2010-01-29 Appareil électronique de fonctionnement pour une lampe à décharge dans un gaz

Country Status (7)

Country Link
US (1) US20110298383A1 (fr)
EP (1) EP2399429A1 (fr)
JP (1) JP2012518977A (fr)
KR (1) KR20110119812A (fr)
CN (1) CN102326454A (fr)
DE (1) DE102009009892A1 (fr)
WO (1) WO2010094543A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102010029981A1 (de) * 2010-06-11 2011-12-15 Osram Gesellschaft mit beschränkter Haftung Elektronisches Betriebsgerät für Gasentladungslampen mit verringerter Verlustleistung und Verfahren zum Betreiben des Betriebsgerätes
DE102011089553A1 (de) * 2011-12-22 2013-06-27 Robert Bosch Gmbh Elektronisches Vorschaltgerät für eine Gasentladungslampe
US8648643B2 (en) 2012-02-24 2014-02-11 Transphorm Inc. Semiconductor power modules and devices
CN103874299A (zh) * 2014-03-28 2014-06-18 溢阳（太仓）光电科技有限公司 一种新型氙气路灯驱动电路
US9590494B1 (en) 2014-07-17 2017-03-07 Transphorm Inc. Bridgeless power factor correction circuits
US10200030B2 (en) 2015-03-13 2019-02-05 Transphorm Inc. Paralleling of switching devices for high power circuits
DE102016223153A1 (de) 2016-11-23 2018-05-24 Osram Gmbh Betreiben eines vorschaltgeräts für eine gasentladungslampe
US10319648B2 (en) 2017-04-17 2019-06-11 Transphorm Inc. Conditions for burn-in of high power semiconductors

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Also Published As

Publication number Publication date
DE102009009892A1 (de) 2010-09-16
CN102326454A (zh) 2012-01-18
US20110298383A1 (en) 2011-12-08
WO2010094543A1 (fr) 2010-08-26
JP2012518977A (ja) 2012-08-16
KR20110119812A (ko) 2011-11-02

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