The full-bridge converter of Fig 8-1a is the basic circuit used to convert dc to ac.
The full-bridge converter was introduced as part of a dc power supply circuit in
Chap. 7. In this application, an ac output is synthesized from a dc input by closing
and opening the switches in an appropriate sequence. The output voltage vo
can be Vdc, Vdc, or zero, depending on which switches are closed. Figure 8-1b
to e shows the equivalent circuits for switch combinations.