Thanks for answers. That's a big relief for me because I already ordered my pcb and it takes 1 month to receive.
Why do you have separate gate drivers for positive and negative switch? For a basic bidirectional switch, one driver can drive both gates.
Goal is to synthesizing an AC output at desired V/f, directly from 3-phase using Bidirectional Switches (BDS).
When commutating output from one input to another I have 2 options.
1 - death time (I don't want load phases open-circuit not for a moment, so this is not an option)
2 - safe commutation
I need to do 4-step safe commutation to accomplish a safe commutation. To accomplish this I must be able to control switches seperately.
4-Step commutation
Chart and tables explaination :
i>0 means current flows from source to load,
i<0 means current flows from load to source.
As an example current switching state is Saa (output connected to input A)
Next we need to disconnect Saa and connect to Sbb (output needs connected to input B)
First we need to make switching S1 S2 S5 and Sbb to accomplish this (4-step)
Mathematical simulation results promising but I want to see hardware implemented results. That's why I'm around.
Figure on the left is current, one on the right is Line-Line voltage
Edit Reason : Typo