TinselKoala's Magnetics Workbench

[0c]

I haven't had a chance to map the fields like you requested, 0c, but here is a video of a comparison I did that might be of interest.

http://www.youtube.com/watch?v=mvb39SwTXBE

Good stuff. And I'm sure there's more of this to come. I know how much you like those HV sparks.

But please don't forget I'm primarily interested in the low voltage DC or transient DC magnetic characteristics. First thing I'd like to find out is if there is a noticable difference in shape or intensity of the magnetic field that might make a bifilar coil more suitable for use with a magnet motor. And how effective is a ferromagnetic core for concentrating the magnetic field with these types of coils?

0c

[Pirate88179]

@ Tinsel:

Great video demonstration!!  I subscribed to your youtube channel.  I am on there as 0WildBill0.  Very nicely done.

Bill

[Michelinho]

@Oc,

In an alternator, the bifilar coil will give the same voltage but twice the current over a regular wound coil with the same length of wire. I just finished building an axial flux alternator with bifilar coils, my son-in-law tested both coil versions before I started winding my coils and that is what he saw as output under the same condition of testing.

The results with the bifilar coil Tinsel shows in his video was in line with what I was expecting to see.

Thanks TK for the nice video.

Take care,

Michel

[0c]

In an alternator, the bifilar coil will give the same voltage but twice the current over a regular wound coil with the same length of wire. I just finished building an axial flux alternator with bifilar coils, my son-in-law tested both coil versions before I started winding my coils and that is what he saw as output under the same condition of testing.

Would you be able to share any photos, drawings, notes about this alternator you and your son-in-law built? There might be some answers there. I'm especially interested in the increased current you found (increased current = increased magnetic field).

The spark demo was interesting, but I was also not surprised. There have been a number of experiments demonstrating the electrical characteristics of a Tesla bifilar coil. Except for a couple obscure comments, I have been unable to locate any description of the magnetic characteristics.

@TK, Thanks again for another interesting and informative experiment. Keep up the good work!

0c

[Michelinho]

@ Oc,

You can view the alternator in my Newman motor thread. The Newman uses bifilar and the alternator too. There are pictures and details there:
http://www.overunity.com/index.php?topic=5287.20

Take care,

Michel