Some basic facts and some advanced information on ballasts for fluorescent lamps
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چکیده
Gas discharge lamps, this meaning lamps using the principle to make a gas electrically conductive and thereby light emitting, are a relatively old technique. Especially fluorescent lamps represent a very widespread lighting system. It is not possible to apply the line voltage directly to such lamp, be it AC or DC, a higher or a lower magnitude. Traditionally these lamps have always been operated on AC mains by means of a so-called magnetic ballast, which is nothing more than a reactor or choke, for limiting the lamp current. In recent years, as power electronics techniques came up, an alternative way of operation was introduced, the so-called electronic ballast, which converts the incoming mains frequency into a much higher frequency, usually in the range of 20 kHz to 80 kHz, to operate the lamp with.
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