On coupling with EMI capacitors

Abstract

So far, methodical design of EMI filters for power electronic applications fails, because coupling among the filters' components is not predicted accurately. A method of calculating coupling with EMI capacitors is presented. The method is verified by experimental results. The presented results prove the possibility of simulating field coupling in circuits including the circuit's components. In particular, when miniaturizing power electronic devices, the calculated coupling among conductors and components must be taken into account to ensure EMC at the system level.