Power supply

262

02:40:59

This is a circuit that dropped to mind, I haven't built it practically. But kind of wondering if, it will work in real life. I thought of rectifying 220v AC to 220v DC . then with a current limiting resistor, to limit current flowing through Z diode of 15v stabilization voltage. Which then gets current amplified through a network of Darlington configured transistors and finally the load. All critics are welcomed.

published 6 years ago

ewric

6 years ago

Note you have 200V on every transistor. Imagine a 300 mA current, divided by 3 transistor, 100mA. Power dissipated on each transistor=200*0,1=20W. Times 3 transistors=60W. Power on load=20V*0,3=6W. Efficiency=6/66=0,09...

Laadi

6 years ago

Thanks for your very educating comment. Am grateful.

ewric

6 years ago

This is a linear voltage regulator. What some videos on internet about it or look for lm78XX datasheets. I learnt how to build some linear sources from there. Look for LM371 simple schematic. It also teaches a lot.

Laadi

6 years ago

OK, i will do that

hurz

6 years ago

Hey @Laadi, 220V AC rectified are not 220V DC it would be the factor √2 or 1.414 higher about 311Vpeak. Check the topic sinewave AC vs DC rms

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