"Steve Lusardi" wrote in
:

It is 10 KW and it can use shore
power from 100V to 280V on either 50 or 60 Hz so it is usable anywhere
in the world.

The modern way of creating a wide ranging, DC to radio frequency
isolation "transformer" isn't a transformer at all......

Whatever input AC voltage and frequency is available over a very wide
range is simply "consumed" by a full wave bridge rectifier and low
frequency DC filter, the same as the power supply in your desktop
computer. The resultant unregulated DC, now from 80 to 400VDC is fed to
a high-powered switching inverter, like your battery-powered inverter,
that feeds off whatever DC is available from the rectifier-filter. Its
output frequency is crystal-controlled, its output sinewave is sampled,
measured and the results are fed back to the inverter's control IC, which
determines the pulse width of the inverter's high powered, high voltage
transistor switching array. Over the range of loads from no load to the
capacity of the unit, output is a virtual sinewave at exactly 60 Hz,
voltage regulated to be rock steady. Because such electronics uses a
high frequency switching system with very lightweight toroid
transformers, unlike the old magnetic transformers, you don't need a fork
lift to haul them down the dock, even though they will create 10KW or
more of stable AC power, completely isolated from the power company and
ground.

This is exactly how the new inverter gensets, like my Honda EU3000i 3KW
work. The "generator" is a very high frequency, permanent magnet, 6
phase alternator built into the flywheel of a 6.5 hp, 1-cyl, computer
controlled by the inverter, engine. It looks just like the stator
windings on an outboard motor it was copied from. Being very high
frequency, in the kilocycle range, the size of the magnetic parts becomes
very small and lightweight. The inverter behind the power outlets merely
rectifies and filters it into DC to run the modified sine inverter from,
instead of rectifing the AC line in the paragraph above.

Switchers are very neat, very efficient pieces of electronic art....(c;