I have an application where I am producing fairly high short duration pulses into a load, 50A and 100us. I am looking for a common mode inductor to help reduce my EMC emissions.
Because these pulses are short and infrequent then from an rms heating point of view this inductor can probably be rated at 5A or less.
Being common mode then the fluxes generated by the outgoing and returning currents will tend to cancel which is the point of a common mode inductor. There must be a point however, where due to slight differences in the coupling between the two windings and the core the choke can saturate and lose inductance.
Does anybody have any experience of this and to what extent you can push the pulsed current beyond the continuous rms rating without loss of inductance.
Are certain types of design better than others in this regard, I would expect toroidal cores to be better than most but I have no evidence to support this. Finally is there any published data available?