Controllable AC source for gas-discharge paths for light production and ozone production

摘要

In the case of light production using gas-discharge lamps, ozone production by means of assisted discharges in oxygen and similar gas-discharge paths, a controllable electrical power supply is required in order to optimise operation. As a result of the arcing characteristics of the load and the requirement for an electrical power supply which is resistant to short circuits in the case of a flashover, ballast inductances, high-reactance transformers etc. are connected between the infinite mains and the load. In consequence, only one specific operating point is possible and large power losses occur. A suitably controlled power electronics device which operates using triangular waveform or even rectangular waveform currents avoids these disadvantages. The efficiencies of the electrical power supply and those of the load also increase. In the case of ozone producers (ozone generators), the power electronics device furthermore multiplies the power of the apparatus (capacitive load) by means of radio-frequency operation. Production-dependent imbalances (asymmetries) of gas-discharge lamps can be regulated out by the electronics.