Square wave ballast for mercury free arc lamp

Details Square wave ballast for mercury free arc lamp Square wave ballast for mercury free arc lamp

1999-10-07

2000-12-26

Vu, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315DIG5, 313636, 313637, H05B 3700

Patent

active

061664952

ABSTRACT:
A ballast for a mercury-free, metal halide arc lamp having a quartz or fused silica envelope. The ballast provides a square-wave voltage, which substantially reduces or eliminates the re-ignition voltage in the mercury-free, metal halide arc lamp. The ballast reverses the voltage polarity, and reestablishes the arc current in the opposite direction, before the free halogen in the envelope can quench the arc.

REFERENCES:
patent: 5517088 (1996-05-01), Blom
patent: 5973453 (1999-10-01), Van Vliet et al.

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