2.1 OPERATION
Each pulse of rectified output is 3.334ms. let me consider
first pulse in which switch (S1) and switch S6) will conduct
for 60° which is equal to 3.334ms, but at the same time the
other two switches (S4 and S3) of same legs are not
conducting. Make use of these two switches for the inverter
operation.
The conduction time of these switches depend on switching
frequency; in the design chosen switching frequency is 25
kHz. So, the conduction cycle will be 40μs and for the first
20μs S1 and S6 will conduct and for the next 20μs S3 and S4
will conduct. For the first 3.334ms switches S1, S4 and S6, S3