The arrangement of the full-bridge, current-source inverter as a power supply for ozone generators providing high power factor (PF) and high electrical efficiency in a single stage is the main contribution of this paper. The corresponding design, simulation, and experimental results are presented. Also, the use of the current-fed, full-bridge resonant inverter for PF correction in ozone generation applications is discussed. The proposed power supply consists of an ac supply, a single rectifier bridge, an input inductor to the inverter, four switches, an LC parallel resonant tank, a resonant transformer, and a set of ozone generating cells. Experimental results with the proposed topology provided 96% for PF, 91% for electrical efficiency, and ozone production of 614 mgO ₃ /min, satisfying the requirements of the standard 61000-3-2, class A.

This paper presents the study of quasi-square waveforms in order to avoid the problem of acoustic resonances in lamps of high intensity discharge. The study consists in the analysis of the electric power waveform, mainly, the study of the effect of the power harmonics generated with the quasi square waveform over the arc discharge of the lamp. The incidence of the acoustic resonances is evaluated by means of the wave equation for a high pressure Sodium lamp model Lucalox LU-70. After, the harmonics of the power waveform are obtained by Spice simulations and compared with the characteristics frequencies evaluated for this lamp. The analysis of the results indicate that a low frequency it is possible to avoid the presence of acoustic resonances with this kind of waveforms.