Qaisar Azeemi
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So you mean there is no way at all to make a transformerless powersupplies for high currents??? :-(
I think Chinees are making such type of power supplies. Do you know anything about that? i also hear about some UPSes (1KVA or 2KVA) in our country that are using Transformerless approach. :-(
It is not possible to make a supply with such a large current supply. I think what you are assuming a TRANSFORMERLESS power supply is the Switch Mode power supply (SMPS) as said in post #5 and #7. The reason for assuming is that it is almost weightless as compared to the Transformer power supply. In post #7 many references are given for good guidance.i have made a battery charger successfully with a maximum output of 20A. i used 20A transformer in it but it is too bulky and having larger in size and having cost double than the original circuit... so i want to replace the transformer with an Electronic circuit....
Please refer the following article to know how to make a CHEAP, high current transformerless power supply circuit
transformer less circuitory in high current rating is not possible in real time even smps follows some form of power transformations only SO IT IS PRACTICALLY NOT POSSIBLE in current world scenario
The original post is asking about a 20 A battery charger. Providing 20 A by the suggested method involves peak currents of several 100 A and > 50 A rms current. That's effectively impossible.It is possible. I have done this with a mosfet a transistor and a zener, basically I control the switching of the mosfet so as to charge a capacitor only from 0 to 12v of the sine wave. It provides good power and no inductor or transformer is used. So yes, its possible and I've done this before.
Hello Mr
i have 220v source with max 0.5a
can i use this anyway to drive a transformer then connect it to an inverter to supply higher current ?
thx
It is possible. I have done this with a mosfet It provides good power and no inductor or transformer is used. So yes, its possible
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