Evaluation of Multichannel Synchronous Conducted TDEMI Measurements for High Voltage Power Electronics

Safely measuring high power conducted electromagnetic interference (EMI) is an issue to be addressed, where a possible measurement strategy is being discussed in this paper which uses the benefits of multi-channel synchronous time-domain electromagnetic interference (TDEMI) measurements. Only the differential mode (DM) voltage has been evaluated in this paper, however the setup is not limited in this respect. Common mode (CM) voltage can also be synchronously analyzed with this setup. Nevertheless, with respect to the to be measured amplitudes, DM voltages in this particular system offer a larger challenge and are addressed. The setup was developed with respect to Low-Frequency conducted EMI measurements in high power, fast switching systems using a low-cost solution.