The THD of both the line-to-line and line-to-neutral voltages can be shown to be
31 percent from Eq. (8-17). The THD of the currents in load-dependent 15 are
smaller for an RL load. An example of the line-to-neutral voltage and line current
for an RL wye-connected load is shown in Fig. 8-28e.
The output frequency can be controlled by changing the switching frequency.
The magnitude of the output voltage depends on the value of the dc supply voltage.
To control the output voltage of the six-step inverter, the dc input voltage must
be adjusted.