19 Oct
2007
19 Oct
'07
1:11 p.m.
Worrying about any sort of single to three phase
converter for a
modernish computer is just a waste of money.
This amounts to declaring anything that depends on three-phase as
non-"modernish". But there really are substantive differences between
three-phase and single-phase for supplying power, since rectified
single-phase drops to zero (even if full-wave rectified). Rectified
three-phase has a substantial minimum DC component (cos(30?), about
.866, times peak, if full-wave rectified; cos(60?), or .5, times peak,
if half-wave rectified - minus rectifier losses - assuming pure
sine-wave input - I think).
This means substantially less need for filter caps and the like -
indeed, if you're willing to depend on having all three phases, and
your regulators are good enough at ripple rejection, you may be able to
run without any filter caps on the unregulated side of the regulator.
Try feeding *that* single phase!
/~\ The ASCII der Mouse
\ / Ribbon Campaign
X Against HTML mouse at rodents.montreal.qc.ca
/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B