AC switching

Hi,

I have questions ...

First of all: What is your question? I see no problem, no description of a problem.. I don´t know what you expect from us.

Then:
"C" usually is used for capacitors. But here you used it for inductive loads. Is there any reason for this?
In your description there is nothing mentioned about a motor .... but the PDF filename talks about a motor. So is it a motor or not?
Can you modify your inductive loads so that you get one common connectior and one for "in phase" and one for "out of phase" operation?
How much sense does it make to have a 50Hz mains frequency ... but switch the loads with 400Hz? What´s the use of it?
I don´t know what to do with the +/-5V information. I see nothing about this in your draft.
Who / what controls the swtiching?
Are you aware that wrong switching sequence my caue a hard short circuit. Thus you need a clear OFF state before ON again.

You say "to be determined by the designer". Who is the designer if not you?

Klaus

U have 4 active switches which need controlling {time and voltage} switching states for different sequences of L2 coil
0 = off, 1 = on

S1 S2 S3 S4
1 1 0 0 Normal
0 0 1 1 Reversed
0 0 0 0 Off
1 0 0 0 other transition modes.
0 1 0 0 "
0 0 1 0 "
0 0 0 1 "

Several issues are:
1. flyback of high voltage spikes
2. Unknown type of AC motor, (Induction, Reluctance etc)
3. No detailed specs, no questions, no more answers.

Your switches are an arrangement known as an H-bridge. You may have some experimental purpose in running two motors in 'sync' at times or else 'out of sync'. Are they located close together? Do you plan to watch what effect their operation has on each other?

It isn't easy to switch house voltage in one direction not to mention back-and-forth using low voltage transistors. Or do you plan to build a special kind of circuit?