O.k. 250 us/div, if I see right, the screen has 12 divisions and the wave period is 10 divisions or 2.5 ms, thus correct 400 Hz.
As for the IR2110 in multilevel circuit question, we would need to see the complete schematic.
1 / ( 14 x 250uS ) = 285.71 Hz ...
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for 50Hz each of the 14 steps needs to be 1.428mS, for 400Hz each of the 14 steps needs to be 178.56uS long
If I read the breadboard wiring correctly, all IR2110 are connected to a common ground and power supply. But 4 of 6 devices don't drive a ground connected low side transistor, which is the prerequisite for correct operation of the driver.
A ha, FvM is right you can only use the top half of the 2110 to drive devices that are not source = gnd, and you must allow for bootstrap charging if they are not fed by individual isolated gate drive supplies
Hi, I did the schematic yesterday after work, I have no many time to do my project, sorry for my delay..You didn't yet show a complete schematic of your circuit.
I am not sure about the application of this design in a real situation
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