In a message dated 97-03-14 04:24:25 EST, Roger Garnett wrote:
<< > It's easier with a graph but bear with me.
Well, I can even do that. Due to the nature and timing of the 3 sine waves,
the
resultant power curve looks like this:
_____________________________________________________
That's right- flat, with no peaks. The highs & lows of all 3 phases cancel
out
to make a nice, constant power output. The result? With the peaks of
single/dual phase, you get pulsing at the line frequency, which can be seen
in
the final work. With 3 phase, it's smooth, like DC.
>>
Close, but not quite. It's true the resulting voltage curve won't drop below
zero, but the output will have a PRONOUNCED 180 Hz ripple. Much smoother than
single phase, but certainly NOT DC!
Dan Masters,
Retired Electrical Engineer,
Alcoa, TN
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