Estudo da Interferência eletromagnética produzida por lâmpadas fluorescentes compactas.

Abstract

This work constitutes with the Study of Electromagnetic Interference Produced by Compact Fluorescent Lamps (CFL’s). We studied the behavior of the electromagnetic spectrum emitted by CFL’s with integrated ballast. These devices are one of the most popular light sources and are present in various environments, from homes to medical clinics. In Brazil, its massive use and lack of specific regulations with regard to electromagnetic compatibility and interferece (EMI) have motivated this work. Highlight the incompatibility of the CFL’s tested with the international standard and the design of EMI filter as a mitigating of radio frequency noise produced by them Two models for the internal circuitry of the lamp were analyzed by computation simulations. Some restrictions are outlined in the model suggested in the literature. It is proposed a new circuit model for the CFL including the effects of high frequency in the circuit of the real lamp. One discusses the influence of CFL’s in the harmonics generation and energy quality.The tests were done following the recommendations of the international standard CISPR 15, which covers the range from 9 kHz to 30 MHz in some brands of lamps on the market in the northeast region, particularly in the state of Paraiba, Brazil. The brands cover the less popular the unknown to international known brands. The cases analyzed take into account the number of lamps (one, two, three and five), the distance of separation between them and their powers. The analysis was performed on each pair of lamps from the same brand. Was tested fourteen marks. The lamps spectrum results with and without the EMI filter have been presented, one conclude that the filter works satisfactorily in blocking the EMI produced by CFL’s over majority brands tested that violate the CISPR 15.