RadioBanter - View Single Post

May 5th 04, 09:05 PM

wrote:

I'ts a power converter for my Solar RC plane.
The inductors and the wires carying the current to the motor are a
significant part of the power system weight.

Paul

On Wed, 05 May 2004 10:21:14 -0700, Tim Wescott wrote:

wrote:

Anyone know where I can find/ purchase a small qualtity
(Or any quantity) of Aluminum Magnet Wire?

Looking for 12 or 14 Ga AL magnet wire, square would be better, round is acceptable.

Paul (Kl7JG)

Why? It's way less conductive than copper, so unless you're making an
air-wound coil that needs to save a few ounces I can't see how you'd
save anything using Al over Copper.

But I'm willing to be educated.

I suspect that you have a choice between (a) losing more power to
resistive losses because of the lower conductivity of aluminum or (b)
_increasing_ the weight of your power converter because you've increased
the core size to save on resistive losses. You may be able to do better
with _silver_ wire and a smaller core, for all I know.

This doesn't mean that you shouldn't make the attempt, I'm just
wondering if you've taken all the variables into account.

Have you already pushed the switcher frequency up to insane levels?
Looked into resonant topologies, all that stuff?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com