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

Yoshihiko Namba (EMC & PCB Analysis Division, Matsushita Electric Works Analysis Center Co. Ltd, Osaka, Japan)
Tomoyuki Kida (EMC & PCB Analysis Division, Matsushita Electric Works Analysis Center Co. Ltd, Osaka, Japan)
Yoshio Mitsutake (Advanced Technologies Development Laboratory, Matsushita Electric Works Ltd, Osaka, Japan)
Katsuhiro Hirata (Graduate School of Engineering, Osaka University, Osaka, Japan)

Abstract

Purpose

This 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/approach

The 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.

Findings

The 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/implications

The 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/value

In 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.

Keywords

Citation

Namba, Y., Kida, T., Mitsutake, Y. and Hirata, K. (2008), "Conducted emission analysis of a lighting implement employing the 3D finite element method", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 27 No. 4, pp. 855-860. https://doi.org/10.1108/03321640810878261

Publisher

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Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited