Electric lamp and discharge devices: systems – Plural load device systems
Patent
1985-05-06
1990-01-23
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Plural load device systems
315 97, 315255, 315324, 315DIG5, H05B 4129
Patent
active
048960780
ABSTRACT:
A ballasting system for powering an array of multiple parallel-oriented fluorescent lamps in a sun tanning apparatus comprises and an electronic frequency converter adapted to convert ordinary 60 Hz power line voltage into a 350 Volt/30 Hz sinusoidal voltage provided between a pair of bus conductors and suitable for directly powering each fluorescent lamp by way of a simple capacitive or inductive current-limiting reactance means. The fluorescent lamp cathodes are heated by way of individual transformers, with one transformer for each pair of lamp cathodes. Only two pairs of distribution conductors are required for powering the complete array of mutually parallel-disposed fluorescent lamp pairs regardless of the number of lamps involved, with one pair running along the one side of the array, and the other pair running along the other side of the array. Of each pair of fluorescent lamps, one lamp is powered by way of an inductive reactance means and one lamp is powered by way of a capacitive reactance means. That way, as long as each of the two lamps operates at approximately the same power level, the total net load represented by each pair of lamps will be substantially resistive.
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