Hi guys I wanted some suggestion on a microprocessor based Automatic Voltage Regulator design, I am trying to stabilise a standalone synchronous machine by adjusting the field voltage, the rated voltage of the synchronous machine is 400 V ac and it runs at 1500rpm.

 

I am assuming this is to be retrofitted to an existing motor, not designed into an existing one?

I am also assuming that you are talking about speed regulation against varying load?

What options do you have to measure the speed?

Why do you want to use voltage control rather than curent control which is more normal?