Solid state ignitor

Details Solid state ignitor Solid state ignitor

1988-09-22

1990-09-18

Mis, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315220, 315279, 315287, 315290, 315DIG7, H05B 4136

Patent

active

049581090

ABSTRACT:
The ignitor is a high voltage power supply for intermittent operation used to ignite HMI (Hydrargyrum Medium Arc Iodide), Xenon and mercury arc lamps of the type typically used in motion pictures, video applications, theater and television. The ignitor inputs through a rectifier circuit and the rectified current drives the primary coil of the first transformer of two ganged transformers. The primary coil is driven into saturation, at which point a pulse-width modulated controller senses that the saturation current has been reached in the primary, and opens a FET which acts as a switch in series with the primary, collapsing the field around the primary to induce an energy surge into the secondary, which results, after further conditioning and transforming, in the production of a high voltage (30 kv-50 kv) arc-jumping current to ignite the arc lamp to which it is connected.

REFERENCES:
patent: 4663570 (1987-05-01), Luchaco et al.
patent: 4686428 (1987-08-01), Kuhnel et al.

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