A quantitative harmonics analysis approach for sinusoidal pulse‐width‐modulation based Z‐source inverters

The shoot-through (ST) states are essential for the operation of sinusoidal pulse-width-modulation (SPWM) based Z-source inverters. However, insertion state unavoidably leads to output harmonics which is greatly affected by its distribution, especially bipolar modulation schemes. With quantitative analysis, this paper investigates mathematical relationship between and single-phase A modified double-Fourier-transformation-based calculation scheme proposed estimate with different methods. Simulations hardware experiments a 200 W converter under two control methods verified accuracy theory. analysis would be helpful design converter's strategy scheme.