60 Hz inductor design?

On 3 Dec 2005 21:57:35 -0800, rqlhgl@ieee.org wrote:

I want to reshape the output of a 115v "modified sine wave" inverter so
as to allow it's use with a 19.2 v NiCad battery charger which refuses
to work with the raw inverter output. Using Spice I find that an
inductor input singly loaded Tchebeyscheff filter would give a much
improved sine waveform. The current thru the 237mH inductor appears to
be 3amp pk with of course a very distorted voltage wave of some 190 v
pk. Is it ok to use power transformer core of the above VA and assume
that since there is no secondary there will be twice the winding area
available. Since the inductor Q is max when conductor loss = core loss
does this mean that the optimum core for an inductor will have a
smaller winding window than that of a trnsformer of the same VA?
I use a 19.2 v Sears drill to raise the sail on my boat and want to
recharge the battery from ship's power (12v).
Dick

Inside the battery charger there is undoubtedly a transformer and
rectifiers. Why not see what that DC voltage is when running on
mains, and then replicate it with a simple DC-to-DC boost converter
on the boat?

Inside the battery charger there is undoubtedly a transformer and
rectifiers. Why not see what that DC voltage is when running on
mains, and then replicate it with a simple DC-to-DC boost converter
on the boat?

Or else the charger is a switcher that takes mains power, rectifies it
straightaway and runs off high DC voltage.
Either way, you'd need a step up in voltage. Just a question of how
much.