Say I have a toroidal coil, and I insert a diametric magnet in it and start spinning it.
Is this an efficient way of generating power? Would it be better to partition the coil in several segments, and use several magnets instead of just one? Would it be better to make the coil's outer diameter larger, so as to step further away from the magnetic field?
That last question is because I'm guessing that the flow of current induced in the coil's outer diameter would have an opposite direction than the one induced in the inner diameter, and the result would be heat in the coil, instead of net current flow through the load.
The purpose of my question is to find if a more or less efficient generator could be built by spinning a magnet, instead of a wire-wound rotor that would need brushes. The contraption's outer diameter needs to be no larger than 35mm, and its thickness 15mm or less. The power I'd like to generate would be about 2 mA, at 6 to 9V if possible. In the end, I'd like to calculate the magnet strength, number of wire turns, and rotational speed needed to obtain such power.
And yes... I did some googling around before posting my question here. But the results were a bunch of crap promoting free energy and overunity nonsense. Maybe I used the wrong keywords for my search.
To those new to this forum: The discussion of overunitiy (a.k.a. free energy crap) goes against the T.O.S. of A.A.C. Please refrain from posting comments related to that subject in this, or any other thread.
Is this an efficient way of generating power? Would it be better to partition the coil in several segments, and use several magnets instead of just one? Would it be better to make the coil's outer diameter larger, so as to step further away from the magnetic field?
That last question is because I'm guessing that the flow of current induced in the coil's outer diameter would have an opposite direction than the one induced in the inner diameter, and the result would be heat in the coil, instead of net current flow through the load.
The purpose of my question is to find if a more or less efficient generator could be built by spinning a magnet, instead of a wire-wound rotor that would need brushes. The contraption's outer diameter needs to be no larger than 35mm, and its thickness 15mm or less. The power I'd like to generate would be about 2 mA, at 6 to 9V if possible. In the end, I'd like to calculate the magnet strength, number of wire turns, and rotational speed needed to obtain such power.
And yes... I did some googling around before posting my question here. But the results were a bunch of crap promoting free energy and overunity nonsense. Maybe I used the wrong keywords for my search.
To those new to this forum: The discussion of overunitiy (a.k.a. free energy crap) goes against the T.O.S. of A.A.C. Please refrain from posting comments related to that subject in this, or any other thread.