**5. Experimental Validation and Results**

*5.1. Experimental Setup*

An inverter prototype is built and tested by applying *f* = 50 Hz and *Ma* = (1.3, 1.15, 0.98 and 0.8) for validating the compatibility of the studied modulation method and the performance of the proposed inverter, as shown in Figure 8. Three isolated DC voltage supplies having different magnitudes (*Vdc* = 20 V, 3*Vdc* = 60 V and 2*Vdc* = 40 V) are used to form the multilevel DC-link. A three-phase load (237 Ω–0.5 H) is used as the output. The inverter control algorithm based on the suggested modulation technique is developed using Simulink/ MATLAB software and TMS320F28335 DSP controller. Figure 9 illustrates the proposed MLI's control diagram.

**Figure 8.** Laboratory setup of the hardware prototype.

**Figure 9.** Control block diagram.
