if I have around 2000 volts with only a few milliamps, can i convert it to 12 volts and at least 1 amp?
Hi,
If you want 12V@1Amp we talk about a Power of P=UxI = 12V x 1 Amp = 12 Watts
If our source Voltage is 2000 V, the needed source current would be > I = P/U = 12W / 2000V = 6mA, or even more
depending on the efficiency of the converter.
For various technical voltage/current situations - there are optimized converters.
Conversion from 2000V DC down to 12 V is a very unusual conversion - so there are no simple out-of-the-box approaches.
Typical semiconductors, transistors, fets used for switching supplies can handle maximum voltage of 600V, state-of the art uptto 1500V, 2000V ist typically above.
If we were talking about 2000V and _energy supply_ with lots of amps - there are thyristor modules which can chop your 2000V into AC - and the voltage could be stepped down with a transformer.
With just a very little current consumed - I have no simple idea at hand.
A basic principle is that the efficiency of the conversion decreases with the voltage span needed.
Making high voltage out of low voltage is even a very simple thing using a flyback transformer.
There ar 3 concepts : transformers (need ac)
magentic switch mode (using rf transformer or flyback)
charge pumps (using switched capacitors)
All 3 concepts need ac or a way to switch the dc current making a pulsed one out of it.
Having more than 600V - we would need a series of fets or transistors - to achieve the high voltage.
Then you would need a transformer which handles the 2000 - to 12 volt conversion - maybe in your case a series of
2 converters would be the solution.
Having conversion 1 from 2000V DC down to 240VAC,
and a second conversion using traditional power supply from 240 downto 12.
What I recall there are 2kV power lines and transformers - but not for 12W.
- conclusion: technically not impossible, but difficult because no standard circuits/schematics/components available.
probably difficult to achieve high efficiency.