One of the most clever things I've read on this site is a post where an experienced builder told a new enthusiast to build the full rotors and magnets set. Then make one coil and insert it. Spin the rotors at the speed you anticipate being able to get, and measure the output.
There are so many variables. I like the oven idea for heat-testing coils, too.
You will need something the size of a 2kW conventional alternator to give you 100W. It will cost you far more in the extra magnets to save a small cost on copper. You will need to wind many strands in hand or use lots of parallel coils.
I can't even see the justification for using second hand magnet wire but that makes a bit more sense although it may cause more trouble than it's worth.
For most of us there is no saving in money from renewable power, it is far more costly than grid power. If you are not on grid and rely on it you had best not cut corners or you will pay dearly. If you are doing it as a hobby then ok have fun but you may be advised to spend precious money on more worthwhile hobbies.
Flux[ Parent ]
