You can't wait for a ready-to-use solution served on a silver platter.

Do some small scale experiments using any toroidal core with reasonably thick wire (e.g. as used in dimmers), put some windings of wire around the existing coil and use different known loads (e.g. sandwich toaster or water boiler) to connect to mains.

Then measure the output voltage at the secondary winding. If you deem it too low add some more windings.

The toroidal will behave like any transformer being connected with the load in series with the only difference, that the voltage drop across it is pretty low.

The photo I posted is part of practical experience and I explained it well.

That shoe won't fit me.

The toroidal as mentioned has been tested and is used in a functioning circuit.

On the other hand, if you want 100% proof and a scientific dissertation about the problem then why not ask a university professor?

Originally Posted by premkumar9

Normally I post questions for practical applications. Not for any school assignment.

Still unsatisfactory, because the answer doesn't include an exact describtion about the object to use.

The toroidal transformer you made may be working fine for your application. My requirement is different. So I need to know the design aspects also to make one suitable for me. Doing it on trial and error basis may not be practical for me.

With other words, you expect a ready-to-go design as well as you expect to do the trial and error work for you by others. (Served on a silver platter)

I am thankful to you for all your suggestions. But my only suggestion not to get irritated when somebody questions your statements.

There is absolutely nothing to question if a tested and working design has been described.

So get your butts up and do some research for your special requirements. The start is given.