Hi,
On 29-5-2013 16:47, Berke Durak wrote:
Using three phases you can get DC with decent ripple using only a
handful of diodes. The power never goes to zero, whereas it would go
to zero 100 times a second if you were using a full-wave rectifier
with single-phase input. If the peak power required by the e-CAT is
around 1 kW, then you would need caps supplying up to 1 kW. We're
talking ~100 µF caps rated at 350V supplying 3.5A. Such large caps
are difficult to find and it makes more sense to go with multiple caps
in parallel to supply that current. These caps would dissipate a
couple watts each. Temperature very quickly shortens the lifetime of
aluminum electrolytic caps. Hence, if you use them you reduce the
reliability of your device, which could be a problem for the e-Cat.
And the above assumes the peak power is 1 kW.
Here is an interesting circuit: http://www.nbtv.wyenet.co.uk/6-fasen.gif
with these voltage and current
http://www.nbtv.wyenet.co.uk/3-fasenspanning+stroom.jpg
It "converts" the three 50 Hz phases into one output of 300 Hz :-) ,
which is a lot easier due to the smaller capacitor needed to be directed
into DC!
Kind regards,
Rob
