A New 3000-Cycle Fluorescent-Lighting System

During the past 20 years, a number of installations have been made with fluorescent lamps operating at frequencies higher than 60 cycles. Generally, the frequency-conversion method has been limited by economics and availability to frequencies under 1000 c/s. With development of the silicon-controlled rectifier (SCR), the semiconductor frequency converter emerged as a reality and frequencies of more than 1000 c/s became practical and economical for fluorescent lighting of commercial and industrial buildings. This paper reports on high-frequency fluorescent lighting in which a new product converts 60-c/s power to 3000-c/s power.