single phase inverter

This simulation file is the single phase full bridge inverter using the IGBT/Diode. When the T2, T2 conduct(triggered), load voltage is Vs and when T3, T4 conduct load voltage is -Vs. Frequency of output voltage can be controlled by varying the periodic time T.
Thyristor T1, T2 are in series across the source ; Thyristors T1, T4, or T3, T4 are also in series across the source. During inverter operation, it should be ensured that two SCRs in the same branch, such as T1, T2 in diagram, do not conduct simultaneously as this would lead to a direct short circuit of the source.
The main drawback of half-bridge inverter is that it requires 3-wire dc supply. This difficulty can be overcome by the use of a full-bridge inverter.