# winding a generating coil

Discussion in 'General Electronics Chat' started by blckwlfny1, Jan 15, 2013.

1. ### blckwlfny1 Thread Starter New Member

Jan 15, 2013
1
0
this is my first post
I have a rudimentary knowlege of electricity theory...working concept of ohms law and series vs parallel circuits ....passed physics 101
But thats where it ends.
I am trying to create a generator coil to insert into an existing rotating magnet system to generate 6-8 volts @ 5A
I have no idea where to start including
What kind of wire
What gauge
Insulated wire?
How many coils...or a range of where to start
What to make the core out of
I know a certain amt of trial and error can be expected, but can someone start me off?
Thanks

2. ### Ron H AAC Fanatic!

Apr 14, 2005
7,018
682
What is the magnet's rotational speed (e.g., RPM)?

3. ### Veracohr Distinguished Member

Jan 3, 2011
665
101
Review Faraday's law of induction. You need to know the flux of the rotating magnet to determine the number of turns of the coil.

As far as wire, I believe wire with a thin insulating coating is used. Uninsulated wire with the coils touching each other would basically be like a sold sheet, not a coil.

4. ### Ron H AAC Fanatic!

Apr 14, 2005
7,018
682
The reason I asked about rotational speed is you are looking for 8V @ 5A. That's 40 Watts. Power is equal to torque times rotational speed. Once we know RPMs, we can calculate how much torque will be required (ideally).