EP2100484A1 - Dispositif d'allumage pour une lampe à décharge à haute pression et lampe à décharge à haute pression avec dispositif d'allumage - Google Patents

Dispositif d'allumage pour une lampe à décharge à haute pression et lampe à décharge à haute pression avec dispositif d'allumage

Info

Publication number
EP2100484A1
EP2100484A1 EP07822870A EP07822870A EP2100484A1 EP 2100484 A1 EP2100484 A1 EP 2100484A1 EP 07822870 A EP07822870 A EP 07822870A EP 07822870 A EP07822870 A EP 07822870A EP 2100484 A1 EP2100484 A1 EP 2100484A1
Authority
EP
European Patent Office
Prior art keywords
pulse generator
spiral line
line pulse
lamp
discharge lamp
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Withdrawn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
EP07822870A
Other languages
German (de)
English (en)
Inventor
Bernhard Siessegger
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 EP2100484A1 publication Critical patent/EP2100484A1/fr
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • 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

Definitions

  • the invention relates to an ignition device for a discharge lamp which is equipped with a spiral line pulse generator which generates the ignition voltage required for igniting the gas discharge in the discharge lamp.
  • Such an ignition device is disclosed for example in US 4,325,004 Bl and in US 4,325,012 Bl.
  • No. 4,325,004 B1 describes an ignition device for a discharge lamp provided with an auxiliary starting electrode, wherein the ignition device has a spiral-line pulse generator whose high-voltage connection is connected to the auxiliary starting electrode.
  • the discharge lamp and the ignition device are operated with the mains alternating voltage.
  • US 4,325,012 Bl describes an ignition device for a high-pressure discharge lamp, wherein the ignition device comprises a spiral line pulse generator whose high voltage terminal is connected to a gas discharge electrode of the high pressure discharge lamp.
  • the high-pressure discharge lamp and the ignition device are operated with the mains AC voltage.
  • a disadvantage of the above-described ignition devices is that they can only be operated with mains alternating voltage, which has a comparatively low frequency, and are unsuitable for operation in the high-frequency range, for example in the megahertz range.
  • the ignition device comprises a spiral line pulse generator and a charging circuit for charging the spiral line pulse generator, wherein according to the invention means are provided for rectifying the charging current in the charging circuit.
  • the means for rectifying the charging current ensures that the spiral line pulse generator is charged to a sufficiently high voltage during high-frequency operation to be able to generate pulses of sufficiently high amplitude when short-circuiting its charging contacts or when it discharges, which allow ignition of the gas discharge in the discharge lamp.
  • the aforesaid charging current rectifying means ensures that the charging of the spiral line pulse generator can extend over several periods of the high frequency AC voltage in the case of high frequency operation of the ignition device and the discharge lamp.
  • the means connected in the charging circuit for rectifying the charging current of the spiral line pulse generator thus make it possible for the spiral line pulse generator to be operated during high-frequency operation of the high-pressure discharge lamp (for example at frequencies in the range from 0.1 MHz to 5 MHz ) can be used as Zündimp- pulse generator for generating the necessary for the ignition of the gas discharge in the high-pressure discharge lamp ignition voltage pulses.
  • high-frequency operation of the high-pressure discharge lamp for example at frequencies in the range from 0.1 MHz to 5 MHz
  • higher frequencies are possible, for example, the operation of the discharge lamp in the ISM bands (ISM band: Industrial Scientific Medical Band) at 13.56 MHz and 27.12 MHz.
  • the high operating frequency allows operation of the discharge lamp above its acoustic resonances, which is of particular advantage, since negative effects by acoustic resonances such as flickering of the emitted light or a reduced life of the lamp, do not occur.
  • the operating frequency above about 300 kHz (for lamps of high power, eg with 250 W rated power) to about 2 MHz (for small lamps, eg with 20 W rated power) to choose.
  • the Means for rectifying the charging current of the spiral line pulse generator at least one diode.
  • the at least one diode By means of the at least one diode, a rectification of the charging current can be ensured in a simple and cost-effective manner, and it can be achieved that the charging of the spiral line pulse generator can extend over several periods of the high-frequency alternating voltage in order to sufficiently charge the spiral line Pulse generator.
  • the means for rectifying the charging current of the spiral line pulse generator advantageously comprise a voltage multiplier circuit, for example a voltage double circuit ,
  • the ignition device according to the invention is advantageously dimensioned such that it contributes to a significant extent to the limitation of the lamp current or for stabilizing the gas discharge. This is true even in the case of a high-frequency lamp current with frequencies in the megahertz range, without having to be feared by the reactance of the igniter considerable stress on the electronic components of the ballast.
  • the impedance of the spiral line pulse generator at the operating frequency advantageously has a value greater than or equal to 0.25 times the value of the lamp impedance.
  • at least one capacitor is connected in series with the spiral line pulse generator. This at least one capacitor offers several advantages.
  • the at least one capacitor prevents diffusion of metal ions from the discharge medium to the discharge vessel wall.
  • the at least one capacitor prevents the diffusion of sodium ions to the discharge vessel wall in the case of metal halide high-pressure discharge lamps and thus contributes to the reduction of the sodium loss in the discharge medium.
  • the high-voltage generated by the spiral line pulse generator is supplied to a arranged in the discharge vessel gas discharge electrode of the discharge lamp and after ignition of the gas discharge in the lamp, the high-frequency lamp current flows through the spiral line pulse generator , the at least one capacitor allows for partial compensation of the inductance of the spiral line pulse generator.
  • the partial compensation of the inductance of the spiral line pulse generator reduces the losses in the operating device of the lamp, since the lower effective inductance of the spiral line pulse generator results in correspondingly reduced reactive power.
  • the at least one capacitor connected in series with the spiral line pulse generator furthermore prevents a direct current flow through the discharge lamp and thus ensures that there is no segregation of the discharge plasma.
  • the at least one, in series with the spiral line pulse Generator switched capacitor with the spiral line pulse generator a series resonant circuit, due to its characteristic by means of a slight frequency variation of the AC voltage source provided by the high frequency AC voltage control of the amplitude of the lamp current or coupled into the lamp electrical power over a large Range of values allows.
  • the aforementioned series resonant circuit enables the so-called power starting in a metal halide high-pressure discharge lamp which serves as a light source in a vehicle headlight.
  • the high-pressure discharge lamp is operated at three to five times its rated power in order to achieve rapid vaporization of the metal halides in the discharge plasma.
  • the spiral line pulse generator and the at least one capacitor connected in series with the spiral line pulse generator are designed as a common component.
  • a space-saving arrangement of these two components can be achieved and both components can be accommodated, for example, in the lamp base or in the interior of the outer bulb of the lamp.
  • the aforementioned common component is preferably designed as a ceramic component, so that it meets the high requirements of operating temperatures of a high pressure discharge lamp withstands.
  • the ignition device has a switching means for short-circuiting the contacts of the spiral line pulse generator arranged in the charging circuit in order to prevent a sudden discharge of the spiral line pulse generator and thus the generation of voltage pulses in the spiral line. To enable pulse generator.
  • the aforementioned switching means for short-circuiting the contacts of the spiral line pulse generator is preferably designed as a threshold value switch, for example as a spark gap, in order to charge the spiral line pulse generator to a sufficiently high voltage, so that when unloading the Spiral line pulse generator generated voltage pulses can cause ignition of the gas discharge in the high pressure discharge lamp.
  • the ignition device according to the invention is preferably housed in the interior of the lamp cap of a discharge lamp or in the outer bulb of a discharge lamp, in particular a high-pressure discharge lamp to allow a compact design and to avoid high voltage lines leading to the lamp.
  • the spiral line pulse generator is designed as a component which encloses the protruding into the lamp base lamp vessel portion of the discharge vessel or an outer bulb of the discharge lamp.
  • FIG. 1 is a circuit diagram of the ignition device according to the first embodiment of the invention
  • FIG. 2 is a circuit diagram of the ignition device according to the second embodiment of the invention.
  • FIG. 3 is a circuit diagram of the ignition device according to the third embodiment of the invention.
  • FIG. 4 is a circuit diagram of the ignition device according to the fourth embodiment of the invention.
  • FIG. 5 A schematic representation of the interconnection of the spiral line pulse generator and of the compensation capacitor, which are designed as a common ceramic component, in accordance with the ignition device shown in FIG.
  • Figure 6 is a schematic representation of the structure of the unit shown in Figure 5 of spiral line pulse generator and compensation capacitor
  • Figure 7 is a schematic representation of the layer sequence of the spiral line pulse generator
  • FIG. 8 is a circuit diagram of the ignition device according to the fifth embodiment of the invention.
  • FIG. 9 A circuit diagram of the ignition device according to the tenth exemplary embodiment of the invention, including sive operating circuit and high pressure discharge lamp
  • the circuit diagram of the ignition device according to the first exemplary embodiment of the invention shown schematically in FIG. 1 is a pulse ignition device for a high-pressure discharge lamp, for example a metal halide high-pressure discharge lamp used as a light source in a vehicle headlight or in a projection device.
  • a ballast 101 for example from the electrical system voltage of the motor vehicle or from the AC mains voltage during the ignition phase and the subsequent operation of Hochtiktikladladlampe pe a high-frequency output voltage in the frequency range of about 0.1 MHz 5 MHz generated.
  • a charging circuit for the spiral line pulse generator 104 is connected, in which the internal terminals 105, 106 of the spiral line pulse generator 104, a rectifier diode 108 and a resistor 109th are switched. Parallel to the two internal connections 105, 106 of the spiral line pulse generator 104, a spark gap 112 is connected.
  • the external terminal 107 of the spiral line pulse generator 104 is connected to a first electrode 110 of the high pressure discharge lamp 100.
  • the first electrode 110 is also connected to the output 102 of the ballast 101.
  • the other electrode 111 of the high-pressure discharge lamp 100 is connected to the second chip output 103 of the ballast 101 connected.
  • the second external contact 108 'of the spiral line pulse generator 104 is connected to no component.
  • the spiral line pulse generator 104 is essentially a capacitor with a capacitance and a non-negligible inductance. It consists of two electrical conductors 701, 702 which are arranged parallel to one another, spirally wound and separated and insulated from one another by two dielectric layers 703, 704.
  • the two dielectric layers 703, 704 each consist of ceramic, in particular of a so-called LTCC ceramic.
  • the abbreviation LTCC stands for low temperature co-fired ceramic.
  • the electrical conductors 701, 702 are made of silver.
  • the layer thickness of the ceramic layers 703, 704 is preferably in the range of 30 ⁇ m to 60 ⁇ m. The ceramic withstands temperatures up to 800 ° C. and has a relative permeability of 65.
  • the thickness of the silver layers 701, 702 is preferably in the range from 1 ⁇ m to 17 ⁇ m.
  • the number n of turns of the spiral line pulse generator 104 is, for example, in the range of 10 to 20.
  • the inner diameter of the spiral line pulse generator 104 is approximately 20 mm and its height is, for example, in the range of 4 mm up to 6 mm.
  • the layer sequence of the spiral line pulse generator 104 is shown schematically in FIG.
  • the sandwich structure shown in FIG. 7 is spirally wound and thus produces the spiral line pulse generator 104.
  • the first electrical conductor 701 has the inner terminal 105 and the outer terminal 107.
  • the other electrical conductor 702 has the inside lying terminal 106 and the outer contact 108 ', which is not used to connect a component.
  • the two internal connections 105, 106 of the spiral line pulse generator 104 are connected in the charging circuit, which is supplied with high-frequency output voltage of the ballast 101.
  • the high-frequency charging current for the spiral line pulse generator 104 is rectified by means of the diode 108 and limited by the resistor 109.
  • the charging of the spiral line pulse generator 104 therefore extends over several periods of the high-frequency output voltage of the ballast 101.
  • the charging circuit and also the spark gap 112 are short-circuited by the now conductive discharge path of the high-pressure discharge lamp 100.
  • the high-frequency discharge current of the high-pressure discharge lamp 100 flows through the terminals 105, 107 through the electrical conductor 701 of the spiral line pulse generator 104.
  • the impedance which can be measured between the terminals 105 and 107 of the spiral line pulse generator 104, can after ignition of the gas discharge during lamp operation to limit the lamp current or be used to stabilize the gas discharge. Due to the wound structure of the spiral line pulse generator 104, this impedance is predominantly inductive.
  • the spiral line pulse generator 104 is dimensioned such that its impedance at the frequency (or fundamental oscillation) of the lamp current is 0, 25 times to 7 times the impedance of the high pressure discharge lamp 100 corresponds.
  • the impedance of the spiral line pulse generator 104 stabilization of the lamp current flowing after the ignition of the gas discharge over the discharge path of the high pressure discharge lamp 100 is generally not possible, and for larger values of the impedance of the spiral line pulse generator 104 is no longer efficient lamp operation possible because the ballast 101 then has to provide a very high output voltage for lamp operation because of the high reactive power and losses.
  • the geometric dimensions and the materials used are selected accordingly.
  • this can be a material having a high permeability, which is determined by the inner diameter of the spiral line pulse generator 104, enclose.
  • a ferrite rod stretched by the spiral line pulse generator 104 significantly increases the inductive component of the impedance of the spiral line pulse generator 104.
  • a ring formed from a U and an I core can also surround the annular spiral line pulse generator 104, wherein the impedance can be adjusted through the air gap between the U and the I core.
  • the sixth embodiment described below indicates a particularly advantageous embodiment of the first embodiment, in which the impedance of the spiral line pulse generator 104 accomplishes the stabilization of the gas discharge.
  • a spiral line pulse generator 104 is used, which by a series circuit of an inductance of 180 microhenry and a 0.8 ohm ohmic resistance.
  • the ballast 100 provides an approximately sinusoidal current at a frequency of 100 kHz, so that the small ohmic component of the total impedance of the spiral line pulse generator 104 results in a particularly efficient lamp operation.
  • the discharge lamp is operated in a so-called frequency window, in which there are no negative effects due to acoustic resonances.
  • the seventh embodiment described below also gives a particularly advantageous embodiment of the 1, in which the impedance of the spiral line pulse generator 104 accomplishes the stabilization of the gas discharge and in which the lamp is operated in the region above the acoustic resonances.
  • the mercury-containing high-pressure discharge lamp (100) with a ceramic discharge vessel has a nominal power of 20 W and a nominal firing voltage of 85 V.
  • the spiral line pulse generator 104 is represented by a series connection of an inductance of 16 microhenries and an ohmic resistance of 2.2 ohms.
  • the ballast 100 supplies an approximately sinusoidal current with a frequency of 2.45 MHz, so that the low ohmic component of the total impedance of the spiral line pulse generator 104 results in a particularly efficient lamp operation.
  • FIGS. 1 and 2 shows the circuit diagram of a second embodiment of the ignition device according to the invention with connected high-pressure discharge lamp 100 'is shown.
  • This exemplary embodiment differs from the first exemplary embodiment only in that a high-pressure discharge lamp 100 'equipped with an auxiliary starting electrode 113' is connected to the ignition device according to the invention instead of the high-pressure discharge lamp 100.
  • FIGS. 1 and 2 therefore, the same reference numerals are used for identical components.
  • the high-pressure discharge lamp 100' has an auxiliary starting electrode 113 'which is arranged outside the inner chamber enclosed by the discharge vessel and with the ignition voltage pulses for igniting the gas discharge the high pressure discharge lamp 100 'is applied.
  • the external terminal 107 of the first electrical conductor of the spiral line pulse generator 104 is connected to the auxiliary starting electrode 113 '.
  • the spiral line pulse generator 104 is charged to the breakdown voltage of the spark gap 112.
  • the spiral line pulse generator 104 When the breakdown voltage of the spark gap 112 is reached, the spiral line pulse generator 104 is discharged, as already explained above, whereby voltage pulses are generated at the external terminal 107 of the spiral line pulse generator 104 Ignition auxiliary electrode 113 'of the high pressure discharge lamp 100' are supplied to ignite the gas discharge in the high pressure discharge lamp 100 '. After ignition of the gas discharge in the high-pressure discharge lamp 100 ', the charging circuit of the spiral line pulse generator 104 and the spark gap 112 are short-circuited by the now conductive discharge path of the high-pressure discharge lamp 100'.
  • the discharge current of the high-pressure discharge lamp 100 ' flows at node Al into the current path 114' via the gas discharge electrodes 110 ', 111' of the high-pressure discharge lamp 100 '.
  • the spiral line pulse generator 104 is inoperative after ignition of the gas discharge in the high-pressure discharge lamp 100 '.
  • auxiliary starting electrode 113 ' which is arranged outside the inner space enclosed by the discharge vessel, it is a lamp with capacitively coupled Zündangeselekt- rode. If the auxiliary ignition electrode is attached in another way coupled, so the circuit according to the invention can be applied accordingly.
  • auxiliary starting electrode projects into the interior space enclosed by the discharge vessel.
  • FIG 3 the circuit diagram of a third embodiment of the ignition device according to the invention is shown schematically.
  • This third embodiment differs from the first embodiment in that in the charging circuit of the spiral line pulse generator 104, a voltage doubling circuit 308, 310, 311 is arranged at the inner terminals 105, 106 of the spiral line pulse generator 104 provides the double, rectified output voltage of the ballast 101.
  • Identical components are therefore provided in Figures 1 and 3 with the same reference numerals.
  • the voltage doubler circuit consists of the rectifier diodes 308, 310 and the capacitor 311.
  • the high frequency output voltage provided at the terminals 102, 103 of the ballast 101 is applied to the internal terminals 105, 106 of the spiral Line pulse generator 104 generates up to twice as high a DC voltage as the amplitude of the output voltage of the ballast 101.
  • the spiral line pulse generator 104 can thereby be charged to a significantly higher voltage than in the first embodiment, provided that the breakdown voltage of the spark gap 312 is also designed to be correspondingly higher.
  • a voltage doubling of the input voltage to the inside lying terminals 105, 106 of the spiral line pulse generator 104 leads to a doubling of the ignition voltage available at the external terminal 107 of the spiral line pulse generator 104 Zündschreibsimpulse for the electrode 110 of the high pressure discharge lamp 100.
  • the operation of the ignition device and of the spiral line pulse generator 104 according to the third embodiment, apart from the voltage doubling, is identical to the operation of the above-described first embodiment of the ignition device according to the invention.
  • voltage multiplier circuit in addition to the unbalanced voltage doubling circuit shown here, which is also referred to as single-stage cascade circuits, the symmetrical voltage doubling circuit or alternatively multi-stage cascade circuits can be used.
  • FIG. 4 shows the circuit diagram of a fourth exemplary embodiment of the ignition device according to the invention.
  • This fourth exemplary embodiment differs from the first exemplary embodiment only in that a capacitor 400 is connected between the external terminal 107 of the spiral line pulse generator 104 and the electrode 110 of the high-pressure discharge lamp 100.
  • the ignition devices according to the first and fourth embodiments agree. Therefore, the same reference numerals are used in Figures 1 and 4 for identical components.
  • the capacitor 400 provides for the high voltage pulses generated by the spiral line pulse generator 104 and provided at the terminal 107 for igniting the gas discharge This means that the generated ignition voltage pulse is only slightly attenuated, and despite the capacitor 400, the amplitude of the ignition pulse at the electrode 110 is more than 70% of the amplitude of the voltage pulse at the terminal 107.
  • the capacitor 400 serves to partially compensate for the inductance of the spiral line pulse generator 104 during lamp operation after completion of the ignition phase of the high-pressure discharge lamp 100, when the first conductor 701 of the spiral line pulse generator 104 is flowed through by the high-frequency lamp current .
  • the operation of the ignition device according to the fourth embodiment is identical to the above-described operation of the ignition device according to the first embodiment.
  • a high-frequency current flows through the electrical conductor 701 of the spiral line pulse generator 104 and via the Kompensationskon- capacitor 400 and the discharge path of the high pressure discharge lamp 100.
  • the inductance of the spiral line pulse Generator 104 is used to limit this current.
  • a high inductance which may well be desirable during the ignition phase, because of the often associated with it desirable properties of the spiral line pulse generator, causes losses in the ballast during lamp operation after completion of the ignition phase. Therefore, in series with the conductor 701 of the spiral line pulse generator 104, the capacitor 400 is connected whose capacitance is dimensioned such that it is in close proximity during the ignition phase. represents a short circuit for the Zündnapssimpulse and during the subsequent lamp operation, the effective inductance of the current flowing through the lamp current spiral line pulse generator 104 is reduced.
  • the capacitor 400 prevents a DC flow through the discharge lamp and thus ensures that no segregation of the discharge plasma takes place.
  • the latter would be the case, for example, if the ballast 101 essentially consisted of a half-bridge circuit, the voltage output 102 being connected to the midpoint of the half-bridge and the voltage output 103 to the positive or negative supply voltage of the half-bridge.
  • the capacitor 400 in this case has the task of a DC blocking capacitor.
  • the capacitor 400 connected in series with the spiral line pulse generator forms a series resonant circuit with the spiral line pulse generator, which regulates the amplitude of the lamp current due to its characteristic by means of a slight frequency variation of the high frequency AC voltage provided by the AC source or the coupled into the lamp electrical power over a wide range of values allows.
  • the aforementioned series resonant circuit enables the so-called power start in a metal halide high-pressure discharge lamp, which serves as a light source in a vehicle headlight. During this power start, which takes place immediately after the ignition of the gas discharge in the high-pressure discharge lamp, the high-pressure discharge lamp becomes operated at three to five times their rated power to achieve rapid vaporization of the metal halides in the discharge plasma.
  • the eighth embodiment described below indicates a particularly advantageous embodiment of the fourth embodiment, wherein the high-pressure discharge lamp 100 is used from the seventh embodiment.
  • a spiral line pulse generator 104 is used, which can generate a significantly higher ignition voltage of 18 kV.
  • this has a much higher inductance of 246 microhenry and a ohmic resistance of 5.5 ohms between the terminals 105 and 107.
  • the compensation capacitor 400 of 30 picofarad is an efficient operation of the entire system in a lamp current supplied by the ballast 101 with a Frequency of about 2.5 MHz achieved. Also in this case, the stabilization of the discharge by the igniter takes place.
  • the ninth embodiment described below indicates a particularly advantageous embodiment of the fourth embodiment, wherein the high-pressure discharge lamp 100 is used from the sixth embodiment.
  • a spiral line pulse generator 104 is now used, which can generate a much higher ignition voltage of 25 kV.
  • This has an inductance of 51 microhenry and a resistance of 0.8 ohms between the terminals 105 and 107.
  • the compensation capacitor (400) of 270 Pikfarad, an efficient operation of the entire system at a lamp current supplied by the ballast 101 with a frequency of 1.85 MHz in stationary operation of the high-pressure discharge lamp. Also in this case, the stabilization of the discharge by the Zündvor- direction takes place.
  • the regulation of the lamp power is carried out as in the previous embodiment by changing the operating frequency or the frequency of the lamp current which is provided by the ballast 101. After ignition, and thus at the beginning of the start of the lamp initially supplied 3 times the rated power. Within a few seconds, the supplied power is continuously reduced to the nominal power, which is done by increasing the operating frequency from about 1.4 MHz to 1.85 MHz.
  • FIG. 8 shows the circuit diagram of a fifth exemplary embodiment of the ignition device according to the invention with connected high-pressure discharge lamp 100 '.
  • This embodiment differs from the second embodiment only in that between see the outer terminal 107 of the first electrical conductor of the spiral line pulse generator 104 and the auxiliary ignition electrode 112 ', the capacitor 800 is connected.
  • the same reference numerals are used for identical components.
  • the capacitor 800 prevents diffusion of metal ions from the discharge medium to the discharge vessel wall.
  • the capacitor prevents the diffusion of sodium ions to the discharge vessel wall and thus contributes to the reduction of the sodium loss in the discharge medium at.
  • This function of the capacitor 800 is effective in all lamps with auxiliary ignition electrode, in particular those with capacitively or galvanically coupled Zündangeselektrode, regardless of the fact that in Figure 8, a lamp is shown with capacitively coupled Zündiselektrode.
  • the operation of the ignition device and the spiral line pulse generator 104 according to the fifth embodiment is, apart from the capacitor 800, identical to the operation of the above-described second exemplary embodiment of the ignition device according to the invention.
  • FIG. 5 schematically shows a circuit diagram of the ceramic component 500, which contains both the spiral line pulse generator 501 and the compensation capacitor 502.
  • the spiral line pulse generator 501 is not shown here as a spiral in order to simplify the circuit diagram.
  • the electrical conductors 503, 504, 505 enclosed in the ceramic dielectric form both the spiral line pulse generator 501 and the compensation capacitor 502.
  • the terminals 506, 507 form the internal connections of the spiral line pulse generator 501, in the charging circuit of the ignition device for the Spiral line pulse generator 501 are connected.
  • the electrical conductor 503 belongs both to the spiral line pulse generator 501 and to the compensation capacitor 502.
  • the sections of the electrical conductor 503 running in the spiral line pulse generator 501 and in the compensation capacitor 502 are via a so-called via 5061 electrically connected to each other.
  • the connection 508 of the compensation capacitor 502 forms the high-voltage output of the ceramic component 500, which is connected to the electrode 110 or to the auxiliary starting electrode 113 'of the high-pressure discharge lamp 100 or 100'.
  • FIG. 6 schematically shows a cross section through the ceramic component 500.
  • the spiral shape is shown schematically in FIG.
  • the ceramic layers 509, 510 acting as a dielectric and the via 5061 are shown in FIG. 6, in addition to the electrical conductors 503, 504, 505, the ceramic layers 509, 510 acting as a dielectric and the via 5061 are shown.
  • the dielectric ceramic layers 509, 510 and the electrical conductors 503, 504, 505 form a sandwich structure as shown in Figure 7, which is spirally wound.
  • the ceramic layers 509, 510 are made of an LTCC ceramic and the electrical conductors 503, 504, 505 and the via 5061 are made of silver.
  • Via 5061 is a silver-filled breakthrough in ceramic dielectric.
  • a vias can also be another connection of the corresponding points, within the two wound into a winding and correspondingly metallized dielectric ceramic layers occur.
  • the spirally curved electrical conductors 503, 504, 505 are drawn in Figure 6 with solid lines.
  • the spirally running, dashed lines in Figure 6 show areas in which no metallic conductor between the ceramic layers 509, 510 is arranged.
  • FIG. 6 only a few turns of the spiral of the spiral line pulse generator 501 and of the compensation capacitor 502 designed as a wound capacitor are depicted for the sake of clarity.
  • FIG. 9 shows the circuit diagram of the tenth exemplary embodiment, which describes a compact arrangement of the overall system which, in addition to the gas discharge lamp and the ignition device according to the invention, also includes the electronic operating device including the control unit.
  • This tenth exemplary embodiment is identical to that in FIG. 4, but in addition a particularly advantageous embodiment of the ballast 101 is disclosed. In FIGS. 4 and 9, the same reference numerals are therefore used for identical components.
  • the tenth embodiment uses the same high-pressure discharge lamp 100 with a ceramic discharge vessel and a rated power of 20W as in the seventh embodiment.
  • the electronic control gear is supplied at the two input terminals 960 and 961 with a mains voltage of 230 V and 50 Hz.
  • the mains voltage is rectified by means of the diodes 950, 951, 952 and 953 and charges the DC link capacitor 940.
  • the lamp 100 is operated via a half-bridge circuit.
  • the half-bridge circuit consists of the two complementarily controlled MOS switching transistors 910 and 920 via their drain-source paths in each case a capacitor 911 or 921 is connected. By means of the capacitors 911 and 921, a switch relieved switching (ZVS) of the transistors is possible.
  • ZVS switch relieved switching
  • For the two transistors 910 and 920 instead of two identical MOSFETs, two complementary types can also be used, implemented as field-effect or bipolar transistors.
  • the half-bridge center is connected to the 12 microhenry choke 901.
  • the choke 901 forms, during ignition, together with the capacitor 900, a series resonant circuit which generates a high AC voltage which is used by the diode 108 to charge the spiral line pulse generator 104.
  • the switching transistors of the half-bridge are driven at a frequency close to the stationary operating frequency of 2.45 MHz.
  • the inductor 901 supplied half-bridge signal is harmonic, so that the excitation of the resonant circuit of 3 times the operating frequency.
  • the ignition takes place by means of the spiral line pulse generator 104, which is represented by a series connection of an inductance of 40 microhenry and a resistance of 6 ohms.
  • the lamp is operated via the compensation capacitor 400 having a size of 150 picofarads, which also prevents direct current through the high-pressure discharge lamp 100.
  • the regulation of the lamp power after ignition takes place by variation of the switching frequency of the two switching transistors 910 and 920 by the control unit 930. In the stationary state, the two switching transitions driven at a frequency of 2.45 MHz.
  • the control unit can obtain information from the operating device as well as the lamp by means of the dotted electrical connections and components:
  • the intermediate circuit voltage can be detected by means of the voltage divider from the two resistors 930 and 931.
  • the extension of the inductor 901 to a transformer by way of the winding 902 provides further information.
  • the lamp current can be detected by the shunt resistor 903.
  • the ignition capacitor 900, the spiral line pulse generator 104 and the compensation capacitor 400 are formed as a common ceramic component.
  • a part of the ballast namely the ignition capacitor 900, is provided by the ceramic component used in the ignition device.
  • This training is analogous to the manner already described above and shown in Figures 5 and 6.
  • the ceramic component has the terminals 109 ', 105, 106, 107 and 108'.
  • the internal connections are led out of the side of the winding.
  • the connection of trapped electrical see ladders can be done via vias in the winding or on the laterally led out terminals of the electrical conductors.
  • the ignition device according to the invention is preferably housed in the base of a high-pressure discharge lamp, for example a metal halide high-pressure discharge lamp, which is provided as a light source for a motor vehicle headlight.
  • a high-pressure discharge lamp for example a metal halide high-pressure discharge lamp, which is provided as a light source for a motor vehicle headlight.
  • a metal halide high-pressure discharge lamp for the ignition devices according to FIGS. 1, 3 and 4 is disclosed, for example, in EP 0 975 007 A1 and such a metal halide high-pressure discharge lamp with auxiliary starting electrode for the ignition device according to FIGS. 2 and 8 is included.
  • WO 98/18297 Al described.
  • the inner diameter of the spiral line pulse generator 104 or 501 is preferably larger than the outer diameter of the discharge vessel or the outer bulb of the disclosed in the aforementioned publications halogen-metal vapor high-pressure discharge lamps.
  • a space-saving arrangement of the spiral line pulse generator 104 in the base of these metal halide high-pressure discharge lamps is possible, in such a way that the spiral line pulse generator 104 projects into the lamp base into the end section of the outer bulb or or and the discharge vessel annularly encloses.
  • the ignition device according to the invention is particularly advantageous for high-frequency operation of these metal halide high-pressure discharge lamps used.
  • the ignition device according to the invention can preferably be accommodated in the outer bulb of a high-pressure discharge lamp, for example a metal halide or sodium high-pressure discharge lamp, which serves as the light source of the general illumination.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un dispositif d'allumage pour une lampe à décharge (100) avec un générateur d'impulsions en spirale (104) et un circuit de charge servant à charger le générateur d'impulsions en spirale. Des moyens (108) servant à redresser le courant de charge sont installés dans le circuit de charge. Cela permet d'adapter le dispositif d'allumage équipé du générateur d'impulsions en spirale (104) à un fonctionnement en haute fréquence. Il peut en particulier être branché dans la prise d'une lampe à décharge à haute pression pour phares de véhicules.
EP07822870A 2006-12-12 2007-11-28 Dispositif d'allumage pour une lampe à décharge à haute pression et lampe à décharge à haute pression avec dispositif d'allumage Withdrawn EP2100484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006058538A DE102006058538A1 (de) 2006-12-12 2006-12-12 Zündvorrichtung für eine Hochdruckentladungslampe und Hochdruckentladungslampe mit Zündvorrichtung
PCT/EP2007/062944 WO2008071547A1 (fr) 2006-12-12 2007-11-28 Dispositif d'allumage pour une lampe à décharge à haute pression et lampe à décharge à haute pression avec dispositif d'allumage

Publications (1)

Publication Number Publication Date
EP2100484A1 true EP2100484A1 (fr) 2009-09-16

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EP07822870A Withdrawn EP2100484A1 (fr) 2006-12-12 2007-11-28 Dispositif d'allumage pour une lampe à décharge à haute pression et lampe à décharge à haute pression avec dispositif d'allumage

Country Status (8)

Country Link
US (1) US20100026202A1 (fr)
EP (1) EP2100484A1 (fr)
JP (1) JP2010512630A (fr)
KR (1) KR20090088948A (fr)
CN (1) CN101536612A (fr)
DE (1) DE102006058538A1 (fr)
TW (1) TW200843560A (fr)
WO (1) WO2008071547A1 (fr)

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DE102005061832A1 (de) * 2005-12-23 2007-06-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe mit verbesserter Zündfähigkeit sowie Hochspannungspulsgenerator
DE102007017497A1 (de) * 2007-04-13 2008-10-16 Osram Gesellschaft mit beschränkter Haftung Mischlichtlampe
DE102011076404B4 (de) 2011-05-24 2014-06-26 TRUMPF Hüttinger GmbH + Co. KG Verfahren zur Impedanzanpassung der Ausgangsimpedanz einer Hochfrequenzleistungsversorgungsanordnung an die Impedanz einer Plasmalast und Hochfrequenzleistungsversorgungsanordnung
US10193228B2 (en) 2013-10-24 2019-01-29 The United States Of America As Represented By The Administrator Of Nasa Antenna for near field sensing and far field transceiving
US10180341B2 (en) 2013-10-24 2019-01-15 The United States Of America As Represented By The Administrator Of Nasa Multi-layer wireless sensor construct for use at electrically-conductive material surfaces
US9497846B2 (en) * 2013-10-24 2016-11-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Plasma generator using spiral conductors
FR3055494B1 (fr) * 2016-08-25 2018-09-21 Clarteis Generateur d'impulsions electriques

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US4484085A (en) * 1982-09-29 1984-11-20 Gte Laboratories Incorporated Spiral line voltage pulse generator characterized by secondary winding
US4721888A (en) * 1984-12-27 1988-01-26 Gte Laboratories Incorporated Arc discharge lamp with ultraviolet enhanced starting circuit
US4629945A (en) * 1984-12-27 1986-12-16 Gte Laboratories Incorporated Method and apparatus for starting low wattage high intensity discharge lamps
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DE102004056002A1 (de) * 2004-11-19 2006-05-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe mit Impulszündvorrichtung und Betriebsverfahren für eine Hochdruckentladungslampe
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Also Published As

Publication number Publication date
TW200843560A (en) 2008-11-01
CN101536612A (zh) 2009-09-16
WO2008071547A1 (fr) 2008-06-19
KR20090088948A (ko) 2009-08-20
JP2010512630A (ja) 2010-04-22
DE102006058538A1 (de) 2008-06-19
US20100026202A1 (en) 2010-02-04

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