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Fig. 6.40 Three-level converter with parallel legs and a summing inductor to generate multilevel voltage
waveforms.
Fig. 6.41 Key waveforms of the three-level converter with parallel legs and a summing inductor circuit
operation. (a) voltage waveform between the mid-point of the left phase leg A 1 and the DC bus mid-point O,
v A10 ; (b) voltage waveform between the mid-point of the right phase leg A 2 and the DC bus mid-point O, v A20 ;
(c) voltage waveform between the phase point and the DC bus mid-point, v AO ; and (d) voltage waveform
across the inductor v A1A2 .
