Circuit for operating high-pressure discharge lamps

Details Circuit for operating high-pressure discharge lamps Circuit for operating high-pressure discharge lamps

2007-05-22

2007-05-22

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Discharge control discharge device load

C315S279000, C315S2090CD, C315S213000

Reexamination Certificate

active

10565073

ABSTRACT:
A circuit for operating high-pressure discharge lamps, wherein a voltage transformer for power supply to a loading circuit includes 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 the high-pressure discharge lamp. The loading circuit includes at least one capacitor (C1) serially 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 the capacitor (C1) substantially 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).

REFERENCES:
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patent: 5990633 (1999-11-01), Hirschmann et al.
patent: 6100652 (2000-08-01), Konopka
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patent: 0922375 (1996-08-01), None
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patent: WO 98/1 8297 (1996-10-01), None
Ben-Yaakov “Design and Performance of an Electronic Ballast for High Pressure Sodium (HPS) Lamps”, Applied Power Electronics Conference and Exposition, 1995.
Gulko & Yaakov “A MHz Electronic Ballast for Automotive-Type HID lamps”, IEEE Power Electronics Specialists Conference, PESC-97, 1997.

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