Conducted electromagnetic compatibility (EMC) noise qualification tests are normally carried out after a prototype has been designed, built and tested and the process is repeated in the event of non-compliance. The ability to determine compliance with electromagnetic interference (EMI) standards at the design stage is therefore desirable. This study will present conducted EMC noise modelling and measurement techniques, yielding simulated and measurement noise results accurate enough to serve as a prequalification test at the design and prototyping stages, respectively. Accurate models of the power feed line connecting the line impedance stabilisation network to the device under test (converter), including the load are developed. Predictive conducted EMC modelling is accomplished using detailed active level 3 SPICE-based models, creating a real-time circuit model consisting of a complete converter in its operational state, without the need to separate into equivalent models. Effects of the power feed-line length on EMI noise measurements are investigated as currently available literature has not dealt adequately with this issue. The modelling and measurements are performed using software and instruments available in a development laboratory.
Grobler, Inus; Gitau, M.N. (Michael)(Institution of Engineering and Technology, 2017-07)
Effects of polymer heatsink materials on electromagnetic interference (EMI) noise in converters have not been adequately investigated. Heatsinks provide a path to ground for the common-mode (CM) noise. Selecting an appropriate ...
Sinha, Saurabh; Stander, Tinus; International Conference on Radioelektronika, (23rd : 2013 : Pardubice, Czech Republic)(Institute of Electrical and Electronics Engineers, 2013-04)
Gigahertz transverse electromagnetic (GTEM) cells
are used extensively in industry for testing the impact of defined
E-fields on devices sensitive to electromagnetic interference.
Compared to anechoic chambers, GTEM ...
Pretorius, Johann Christiaan(University of Pretoria, 2013)
The electromagnetic wave absorption characteristics of composite cement-based building
material have attracted much interest in recent times. Researchers have mainly focused on
the 2 GHz to 12 GHz frequency range. Mobile ...