Conducted emission analysis of a lighting implement employing the 3D finite element method

Abstract

PurposeThis paper aims to describe the simulation technique which can be used at the design stage in order to efficiently develop low‐electromagnetic emission type lighting implements.Design/methodology/approachThe influence on the conducted noise by the change of the implements' shape is investigated employing the 3D finite element method. Because of the difficulty in modelizing the electronic ballast accurately as a noise source, the electronic ballast is replaced by a comparison spectrum transmitter. Line impedance stabilization network is used for the measurement of the noise. The validity of this numerical model is confirmed by comparing the measurement results.FindingsThe validity of the computation was confirmed by comparison with the measured results of a simplified implement model. The difference between the measured and calculated results was less than 5 dB all over the frequency range.Research limitations/implicationsThe frequency range is from 10 to 30 MHz and the construction and wiring of the implement have a great influence on the electromagnetic field.Originality/valueIn previous papers, circuit simulators are used to analyze conducted emission from an electronic circuit including inverter, where common mode current cannot be taken into consideration. Therefore, the displacement current was taken into consideration in the model. Not only the implement, but also the measurement method and environment are modelized in the analyzed model.