Far field extrapolation from near field interactions and shielding influence investigations based on a FE-PEEC coupling method

Considering standards, the main source of far field emitted by power electronic structures is the common mode current generated by the floating potentials tracks. Moreover, due to the frequency and power increases, the compliance to EMC becomes more and more difficult. In consequence, it is necessary to investigate practical solutions to reduce the emitted field. A useful solution is the shielding of wounded components which are near field influent sources. But this solution may be not efficient for far field reduction and investigations concerning component placement can be a better and cheaper solution. A FE-PEEC hybrid method was developed and can be used to investigate near field interactions and shielding influence. The method is applied to a structure combining a common mode filter with the floating potentials of an inverter. Using the hybrid method, the near field interactions and the influence of the common mode inductance shielding are analyzed on the floating potentials which are the sensitive part of the structure.