transformer polarity dot convention

[kduff70]

If there is a chance Transformer Polarity dotted convention are possible test question does anyone know how much I should understand about Dot convention in transformer as well as autotransformer. The only thing I understand so far the current flow through the dot in the transformer but not sure how the dot work with autotransformer Graffeo book has a good explanation of dot polarity with transformer and how to find the effective inductance but is there more about dot convention anyone think I should know? Are there some good example of dot convention polarity information that some could refer me to?

 

[saberger_vt]

Here is some possible useful information found on the internet:

http://faculty.citadel.edu/potisuk/elec202/notes/xformer.pdf

 

[kduff70]

thank you it helps clear thing up a little better

 

[J-Dubbs]

Here are two simple rules for helping remember dot convention:

1. Current - Current goes into the dot on one winding, and comes out of the dot on the other winding.
2. Voltage - Voltage peaks at the same point on both dots.