Hi.

Can someone explain how anautotransformer taps?

I understand there is a single coil on a core, then depending on which output leads along the coil you tap from it will dictate what the voltage will be, tap down or up. But I don't understand the reference to a series coil I have seen in many explanations?

What is the series coil, is it just a coil involved with the tapping mechanism?

Thanks

 

Although wikipedia information is sometimes incorrect, it's still a good first starting point
https://en.wikipedia.org/wiki/Autotransformer

There is only one winding. Post information regarding this so called "series coil".

 

Just that the primary supply and the secondary take off are in series instead of two separate windings in parallel.
Max.

 

Ok. In the example of a regulator as shown in the diagram below, it would appear that the output voltage is being tapped at a point in between the series and the shunt winding, is this correct? How does that work, or is the diagram misleading?