Split it [RE-wrenches]

[R. Sparks Scott]

	Jay;

	From an engineer's standpoint, nothing replaces iron and copper. The
transformers in an inverter are the flywheel that stabilizes the entire
operation. Where sine-wive power is concerned, the hysterisis in an
iron-core transformer is a perfect match for the attack and decay of
waveforms, helping to smooth the sine wave, and moderating instantaneous
current changes induced by the load. Iron core transformers are resilient
to overloads, slow to heat (and cool), and shake off short circuits.
	The unfortunate side effect of this is eddy currents, copper loss and
variable efficiency dependent upon load. Damn those trade offs.
	Correct me if I'm wrong, but do any of the Statpower high-frequency
inverters offer battery charging? Sure, a bi-directional hi-freq circuit is
possible, but more complicated, delicate and would amount to two
independent devices in one cabinet. Add to this that a hi-freq inverter is
two inverters in one anready: ( DC to hi-freq AC / step-up to 120 / rectify
to DC / invert to 120 AC 60 Hz). The charger would have to: (120 AC /
rectify to DC / invert to hi-freq AC / step down to battery voltage /
rectify to DC).  Lots of mucking about for my taste. Too many active
components in the high voltage path. The only component the two circuits
might share would be the hi-freq transformer?
	When it's time to pound nails, give me a 20 ounce, waffle-faced,
fiberglas-handled framing claw hammer. Inverters? I'll take the copper and
iron every time.

	-S

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