transformer battery charger

[fritznien]

its been a while, rms(240ac) times 1.414 = peak
why would i build your cct?
auto battery chargers are cheap and easy to get
with lots of automatic features.
there is a small industry to produce such things.
car truck signals telephone and mining to name a few.
if you push too much juice something will give, xformer windings hookup wire or boil
the over the batt. yes all these will take some abuse but it cuts the life time.
batteries are easy to abuse, over charge over discharge, overheat to name a few.

[stoyan_]

If i short circuit the left side (without the battery and the rectifier + capacitor), the right side will get 240 AC.

[FatBird]

Why Waste My Time monkeying around with that NONSENSE,
when I can buy a $19 battery charger at Harbor Freight?


                                                                                                                                              .

[stoyan_]

Other opinions how much voltage will get the right side ?

[citfta]

If i short circuit the left side (without the battery and the rectifier + capacitor), the right side will get 240 AC.

This question is confusing.  Did you mean by short that you intend to connect the two leads of the transformer together which would bypass the battery and rectifier and capacitor?  Maybe if you explained what you are really trying to do someone would be more able to help you.  It appears you are trying to understand how transformers work but that is not clear.  There are many good electronic classes for free on the internet.  You can study them and learn all about transformers.  I would not recommend watching YouTube videos unless they are produced by a university or tech school as most of the YouTube videos are garbage produced by people that don't really know what they are talking about.

The answer to your question is not easy because there are several variables that enter into the equation.  The design of the transformer can make a large difference  in what will happen on the right side if you short the left side.  The impedance of the primary winding and the size of the core being the two biggest factors in determining what will happen.

Carroll