EMC assessment of a switching mode power supply for electromedical devices

This paper presents the design and electromagnetic characterization of a Switching Mode Power Supply (SMPS) for an impedance cardiometry (ICARD). The proposed SMPS consists of a flyback converter, which best match the several application requirements (galvanic isolation, compactness, multi-output and/or multi-input, simple construction, etc.). Two different flyback prototypes have been thus designed and manufactured, which resort to silicon-based and Silicon Carbide (SiC) devices respectively. Several tests have been then carried out in order to assess EMC performances of both the prototypes for comparison purposes. The results have shown superior performances of the SiC-based prototype, which is thus chosen as the best solution for the SMPS. In conclusion, several EMC tests on the final SMPS prototype are presented and discussed.