The fundamental concept behind multilevel inverters involves the generation of an output voltage from several levels of DC voltages. However, most 3-phase loads are connected in wye or delta, placing constraints on the instantaneous voltages that can be applied to each branch of the load. The required AC output quantity – frequency and voltage – is created by a sequence of segments properly cut out from the input variable quantity, which is a DC-voltage. In order to build. Some medium voltage motor drives and utility applications require medium voltage and megawatt power level. From the little research I have done so far, I have only found inverters with fixed input voltages such as 12V, 24V, 36V or 48V.
