In general, we were accustomed to use a dc/dc boost converter upstream of an inverter, especially in Fuel Cell applications when the output voltage of the Fuel cell needs to be boosted and controlled to feed correctly an inverter. Indeed, there is no trouble when the dc/dc boost converter used is two-level, because it comprises just one output capacitor and consequently one output load. and then, to feed an inverter it will be necessary to connect additionally at least two capacitors to the output, so we can obtain negative voltages relative to the midpoint which is required for the inverter. But if a three-level boost converter (with two output capacitors) is used, rationally one doesn't need to connect other capacitors to the output because we can enjoy the original midpoint of the two output capacitors.

Thus my question is, Ignoring the inverter in my study (it's viewed as an output load or dual load) and when we just interest to the dc/dc part of the powertrain, should i consider the inverter as a dual load or just single load in my dc/dc converter? if it's single it will be okay, but if it's dual how can i assume the load currents' trajectories, knowing that the inverter will feed a synchronous motor of an Electric Vehicle?