Anyone desired to build this transformer
Any opinion to what voltage the 1 microfarad capacitor will be charged ?
about 340 volts.
your turns ratio is all one to one.
so v in = v out.
a battery charger has no need of filtering,
what it needs is voltage and current limiting so you don't cook the battery.
I don't think he has to worry about cooking the battery.
When the 240 volts hits the battery there won't be any pieces left big enough to cook.
Where in the world did that schematic come from?
@fritznien
thanks a lot. one of the best style answers I've got at all.
lets assume battery can handle enormous charging current.
and lets assume there is some resistance on "the battery side"
charged capacitor voltage is = ... 340 Volts again ( :) around 340 Volts) ?
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.
If i short circuit the left side (without the battery and the rectifier + capacitor), the right side will get 240 AC.
Why Waste My Time monkeying around with that NONSENSE,
when I can buy a $19 battery charger at Harbor Freight?
.
Other opinions how much voltage will get the right side ?
Quote from: stoyan_ on October 26, 2016, 04:15:48 PM
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
" Maybe if you explained what you are really trying to do"
what will be the voltage of the charged capacitor on the right side ? The 1 microfarad capacitor.
other opinions ?
"If i short circuit the left side (without the battery and the rectifier + capacitor), the right side will get 240 AC."
that will smoke the xfomer pretty quick.
what is it you want to hear?
No it wont. It is tested. The difference was that it is with resistors instead capacitor.
The test was performed with shorted left side and multimeter on the right side.
got 240 VAC on the right side. The left side had resistance of around 0.5 Ohm - 1 Ohm
What will be the current in XMM3 (Middle node)
Many thanks
1.2 amps
Many thanks. Is it ok to rephrase my question : Currents through R1, R2, R3 :
R1 = 3.964 microamps
R2 = 1.2 amps
R3 = 0 amps
Ohms law:
E=IR I=E/R R=E/I E is voltage. I is current. R is resistance.
Voltage is expressed in volts.
Current is expressed in amps.
Resistance is expressed in ohms.
Many thanks for replies.