SUPPLY APPARATUS FOR HIGH PRESSURE LAMPS

摘要

The invention relates to an apparatus for supplying electrical energy at high frequencies to HID-lamps, comprising at least a first high frequency voltage source adapted to generate a substantial sinusoidal voltage with a fist frequency and a first amplitude, at least a first piezoelectric transformer of which the resonance frequency is substantially equal to the first frequency and which is connected to said first voltage source, a number of secondary voltage sources which are each adapted to generate a substantial sinusoidal voltage with a frequency which is an odd harmonic of the first frequency and an amplitude which is an odd fraction of the first amplitude and a number of piezoelectric transformers of which the connected to the second voltage source.