How Do You Calculate Current from a Faraday Disc?

[charlie r]

Hi,

How do you calculate the current from a faraday disc? I have found calculations for the voltage, but what about the current?
I think it is a bit more complicated due to back emf, but if you know what motor you are using (the torque it can generate), then can you work it out?
Thanks for any help,

Charlie

 

[Drakkith]

I see what you mean. I spent a little bit of time looking myself and couldn't find too much. I finally stumbled across the following article. I hope it helps.

http://www.jaredkirschner.com/uploads/9/6/1/0/9610588/homopolargenerator.pdf

 

[charlie r]

Thanks Drakkith, great link.
It seems that this isn't as simple as i first hoped it was!

Charlie

 

[Malverin]

If you use a flat coil instead of solid disk and coil is wind in such direction, that its magnetic field adds to the field of stator magnets, the generator will be more efficient.