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Three examples shows that with development of electronics technology and information technology, the diversity of test samples brings new challenge to electromagnetic compatibility(EMC) test engineers. For many “special” equipment under test(EUT), standard EMC measurement devices and methods become not “compatible”. Specially designed auxiliary equipments(AE) are in need to make them compatible again...
One electrical fast transient/burst (EFT) test case and one surge test case are demonstrated to show that EFT generators and surge generators that meet the requirements of current standards may lead to unreasonable and irreproducible test results. Analyses on this situation reveal that definition of EFT and surge waveforms is too rough. So a conclusion drawn in this paper is that more detailed definition...
Three kinds of electrical fast transient (EFT) pulse wave forms are defined with three sets of formulas. Based on the formulas, the spectral distribution of EFT signals are deduced by using the method Fourier series expansion. An experiment is designed to verify the deduction and measure the electric field near equipment under EFT test. The results show that the electric field is strong at low frequency...
In this paper, a new method is proposed to test the conducted electromagnetic interference (EMI) noise of new energy based on analysis the internal structure and measuring principle of line impedance stabilization network. A more accurate measurement of conducted EMI noise in new energy system can be provided by this method in order to design the appropriate filter for conducted EMI noise suppression...
Radiation characterization is composed of radiation mechanism diagnosis and radiated electromagnetic (EM) field estimation. Based on not only the internal relationship between radiated EM field and wave impedance, but also the inner relationship between wave impedance and measurement distance, a new near-field method is proposed for diagnosis of radiation mechanism, including common mode (CM) and...
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