It's not worth for you to spend more time?
Time for explaining what voltage you want to regulate.
How much current and how much voltage.
What's the purpose of it?
If this is your question you can get your answers in some search engine. If you feel anyone should help you its better to provide the more technical details. Expecting your reply to help you out.
Servo motor voltage regulator means it's provide constant 230 volts when voltage goes down like 200v or 180v from electricity supplier so the servo motor moves an get 230v from the round type coil transformer