Lebowski wrote:I always had a slightly different view. Iron does not amplify the magnetic field. It concentrates it in a smaller area, thus reducing the length of wire (resistance !) necessary to make N windings. But the field through the windings comes from the permanent magnets.
I've often wondered whether small area windings would be possible in a core-less design, but with the field concentrated by some sort of lens type focussing...
Also, motors and generators are the same thing, with the same design considerations. Whether a machine acts as a motor or a generator is purely and alone determined by the electronics attached to it. If the electronics suck power out it is a generator, if electronics shove power in it is a motor. Efficiency for both setups is ruled by the same consideration: get as much back-emf as possible with the least amount of winding resistance.
Have you seen my motor building threads ? (look for Lebowski axial flux and triple stator axial flux)
You schooled me by there.
Your correct the magnetic field is concentrated not amplified and the coreless motors is just another type of motor I've never encountered, I found this article backing up your info
http://www.designworldonline.com/ironle ... cond-look/
Thanks for the Input helps educate a monkey
I'll be sure to have a read of your threads.