High-pressure discharge lamp igniting circuit in which the volta

Details High-pressure discharge lamp igniting circuit in which the volta High-pressure discharge lamp igniting circuit in which the volta

1995-03-29

1996-07-09

Pascal, Robert

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Inductance in the condenser circuit

315200R, 315282, 315227R, 315224, 315307, 315DIG5, H05B 3700

Patent

active

055347533

ABSTRACT:
The invention relates to a circuit arrangement for igniting a high-pressure discharge lamp (L), provided with input terminals (C,D) for connection to a commutating supply source with a square-wave supply voltage; a pulse-generating circuit (IV) provided with a voltage-dependent breakdown element (3) and with a voltage-raising network (2) formed by a network of rectifiers and capacitors; a pulse transformer (1); and an electrical connection between a secondary winding (12) of the pulse transformer and lamp connection terminals (E,F). The voltage-raising network (2) is in addition provided with inductors means (21, 22). The result of this is that a strongly increased voltage is available across the breakdown element substantially instantaneously after each commutation of the commutating supply voltage.

REFERENCES:
patent: 3849716 (1974-11-01), De Bergh et al.
patent: 4471269 (1984-09-01), Ganser et al.
patent: 4728865 (1988-03-01), Daniels
patent: 4749914 (1988-06-01), Feher et al.
patent: 4893061 (1990-01-01), Linssen
patent: 4952845 (1990-08-01), Veldman
patent: 4958107 (1990-09-01), Mattas et al.
patent: 5084655 (1992-01-01), Van Zanten
patent: 5087859 (1992-02-01), Blankers

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