摘要:
The invention relates to a ballast for a high pressure discharge lamp, in particular to a motor vehicle headlamp or a projection lamp embodied in the form of a class-E converter.
摘要:
The invention relates to a circuit arrangement for operating a high pressure discharge lamp comprising a voltage transformer, a load circuit which is supplied by said voltage transformer and provided with connections for the high pressure discharge lamp (La), a choke (L2b) for limiting a current passing through said high pressure discharge lamp (La) and with an impulse igniting device for igniting a gas discharge therein, wherein the choke (L2b) is embodied in the form of the secondary winding of the igniting transformer (T2) of the impulse igniting device.
摘要:
The invention relates to a device for operating or starting a high-pressure discharge lamp (18), provided with an auxiliary starting electrode (181), whereby the device comprises a voltage-dependent switch means (16), for providing the starting voltage for the high-pressure discharge lamp (18) to the auxiliary starting electrode (181) and the switch threshold voltage of the voltage-dependent switch means (16) is greater tan or the same as the starting voltage of the high-pressure discharge lamp (18).
摘要:
The invention relates to a device for igniting the gas discharge in a high-pressure discharge lamp (La). Said igniting device is embodied as a pulsed igniting device (C, FS, Tr1) while a piezoelectric transformer (PT) is provided for supplying the pulsed igniting device (C, FS, Tr1) with voltage.
摘要:
The invention relates to a circuit for operating high-pressure discharge lamps, wherein a voltage transformer for power supply to a loading circuit comprises a connection for the high-pressure discharge lamp (La) and for the secondary winding (L1b) of an ignition transformer (T1) for an impulse ignition system for igniting a gaseous discharge in said high-pressure discharge lamp. The inventive circuit is characterised in that the loading circuit comprises at least one capacitor (C1) which is in series arranged with the secondary winding (L1b) of the ignition transformer (T1) when the impulse ignition system is reconnected, the capacity of the capacitor (C1) being selected in such away that said capacitor (C1) substentially forms a bridging for ignition impulses generated by the impulse ignition device in such a way that after ignition of the gaseous discharge in the high-pressure discharge lamp (La), at least one partial compensation of the ignition transformer (T1) is produced when the lamp current passes through the secondary winding (L1b).
摘要:
The invention relates to a circuit arrangement for operating high pressure discharge lamps and corresponding operating method, whereby the input voltage for the pulsed trigger device is increased by means of a series resonance loop (L3, C4), of a cascade circuit, or a symmetrical voltage doubling circuit.
摘要:
The invention relates to a device for operating or starting a high-pressure discharge lamp (10), whereby the device comprises a voltage-dependent switch (131), for generation of the starting voltage for the high-pressure discharge lamp (10), the switch threshold voltage of which is greater or equal to the starting voltage of the high-pressure discharge lamp (10) and a corresponding operating or starting method. The invention permits an impulse starting of the high-pressure discharge lamp (10) without use of a starter transformer. Said impulse starting device and said method may be advantageously combined with the high-frequency operation of the high-pressure discharge lamp (10), in particular, with a vehicle headlight high-pressure discharge lamp.
摘要:
The invention relates to an operating method for a high-pressure discharge lamp which comprises a transparent discharge vessel (1), enclosing a substantially cylindrical discharge chamber (10), in which electrodes (2, 3) and an ionizable charge, for generating a light-emitting gas discharge, are arranged, whereby the aspect ratio is higher than 0.86. According to said invention, the high-pressure discharge lamp is operated by means of a substantially sinusoidal current at a preset frequency, lying in a frequency range above 30 kilohertz and free from acoustic resonances.
摘要:
The invention relates to a device for operating a high-pressure gas discharge lamp (Lp), which is provided with a starting auxiliary electrode (ZE), with a current of alternating polarity. The device comprises a series resonance circuit (L11, C1; L, C3) with a resonance inductive resistor (L11; L), which is flowed through by the lamp current when the lamp is in operation, and comprises a starting device for subjecting the starting auxiliary electrode (ZE) to the starting voltage required for starting the gas discharge in the high-pressure gas discharge lamp (Lp). The device comprises a capacitive component (C2; C5), which is connected in series to the resonance inductive resistor (L11; L) and is dimensioned in such a manner that the capacitive component (C2; C5) effects, after the gas discharge in the high-pressure gas discharge lamp (Lp) has been started, at least a partial compensation for the inductance of the resonance inductive resistor (L11; L), flowed through by the lamp current.
摘要:
The invention relates to a lamp base (2) for a high-pressure discharge lamp comprising an ignition transformer (1000), which is placed in the interior (214) of the lamp base (2) and which serves to ignite the gas discharge inside the high-pressure discharge lamp. To this end, the ignition transformer (1000) comprises a core on which its windings (1001, 1002) are placed. The invention is characterized in that the core is formed by a first (1004) and by at least one second core part (1005, 1006, 1007), which are each made of a ferromagnetic or ferrimagnetic material and are separated by at least one gap (1008). The first core part (1004) has a cylindrical section on which the windings (1001, 1002) of the ignition transformer (1000) are placed, and core parts (1004, 1005, 1006, 1007) are formed in such a manner that the core, apart from the at least one gap (1008), has a closed shape.