High Frequency Modeling Technique for Three Phase Power Electronics Module

Nowadays, the high integrated power electronics modules (PMs), characterized by high speed, low loss and hardware miniaturization, represent a new technology that meets the emerging demands of many applications, such us vehicle industry, home appliance and renewable energy sources in smart and micro grid. On the other hand, the integration process and the high switching speeds increase the electromagnetic emissions generated by PMs that can create electromagnetic interference (EMI) with the electric/electronic devices that share the same electromagnetic environment of PMs. For this reason, electromagnetic compatibility (EMC) have to be carefully considered, yet in the design phase, in order to guarantee the safety and reliability of PM systems. To this aim, it is necessary to develop PMs high frequency (HF) model to study the EMI phenomena. In this paper a method to characterize the HF behavior of a three-phase Power Module is presented. The method is based on experimental measurements at the external pins of the device and it allows to extract internal inductive and capacitive parasitic coupling without the knowledge of structural and physics parameters of the PM. The HF model of the PM prototype has been developed in the frequency range of 150kHz- 30MHz and it has been implemented in MATLAB® environment. The method has been experimental validated comparing the frequency responses of the PM characteristics with that obtained by the model.