| Abstract |
During the last years, electromagnetic compatibility (EMC) problems have reached
power electronics. In fact, an increase of electric power levels and semiconductor commutation
frequencies makes static converters become a source of electromagnetic interference (EMI).
The numerical study of the EMI can help the circuit designer to predict the radiated field and
then to modify the circuit with the aim to satisfy International Standards. In this paper, we
present the computational method that we use. This method is based on moments method
coupled to a circuit simulator. After, we use the numerical tool to study the influence of electric
parameters on the electromagnetic field radiated from circuits of power electronic converters.
So the influence of the amplitude of the feeding source, the loaded current, and the chopping
frequency is analysed. Numerical results concerning the radiated electric field by a circuit of a
chopper are presented. Then, these results are compared to measurements realised at our
laboratory. Numerical results are in agreement with experimental results. The numerical tool
for EMI prediction can be used when circuits of power electronics are designed. |
