The
system for offsetting the input
voltage unbalance in multilevel inverters or the like comprises a
control unit operatively associated with a
multilevel inverter for converting
direct current into
alternate current, the
control unit being suitable for piloting the
multilevel inverter for generating an output current depending on a
reference current, and an equalisation unit for equalising the input voltages of the
multilevel inverter having
first generation means of a
harmonic component of order equal to the
reference current,
out of phase with respect to the fundamental component of the
reference current, detection means of the unbalance of the input voltages to the multilevel
inverter, regulation means of the amplitude of the
harmonic component depending on the detected unbalance, for offsetting the unbalance. The method for offsetting the unbalance of the input voltages in multilevel inverters or the like comprises a control phase of a multilevel
inverter for converting
direct current into
alternate current, in which the multilevel
inverter is piloted for generating an output current depending on a reference current, a generation phase of a
harmonic component of order equal to the reference current,
out of phase with respect to the fundamental component of the reference current, a detection phase of the unbalance of the input voltages to the multilevel inverter and a regulation phase of the amplitude of the harmonic component depending on the detected unbalance, for offsetting the unbalance.