One magnet no bearing Bedini motor

[xenomorphlabs]

@Gyula: Your info is EXACTLY what we need to know ! Thanks so much for your input here !!!

I agree that the shape of my coils might be close to ideal. I will just make some with more turns now.

With the helpful calculator i could verify that jonnydavro reaches a 364 % higher inductance with his coil setup than the ones i made. (I had to guesstimate his coil specs though, because he has no data of it)

6313.06 uH as opposed to 23022.46 uH

Well i will stick to SWG 40 (AWG 36-38) for now. Everything thinner is too much of a hazzle hehe.

I once made a 4000 turn JT-toroid with AWG 43 wire and it didnt work, too easy to rupture it i guess.

It seems that we have to find out experimentally what the maximum affordable copper losses are trying out different coils.

[brownsville]

@JonnyDavro - Thanks for the help and info...will rebuild tonight...coil anyway. BTW are you a Doctor Who fan?

Now that Bill has done it with the Lidmotor coil I will git-r-done...I hope.

Thanks again.

Brownsville

[jonnydavro]

@pirate.Thats good news Bill.Try putting the relay in when you get a moment and don't forget to recover the bemf.Your core is in about the same position as mine.Can't wait to see that beast spinning.
@Brownsville.Thats the spirit,never give up.You will get it going and yes i like dr who.
@Gyulasun.Thanks for posting that link.It may help me bring a more scientific approach to the way i make my pickups.Regards jonnydavro

[xenomorphlabs]

Little update:

I use bigger puffer capacitors now to dump into the battery.
Also a different lid that allows a more stable rotation of the magnet.

Video: http://www.youtube.com/watch?v=oFqayiEQpGs

I am wondering if it is wiser to just use one big cap and connect the 4 bridge rectifiers to it ?

Gyula, what would you think is a parallel or serial connection of the rectifiers charging the cap more efficiently?

[Pirate88179]

@ Jonny and all:

Here is a short video of my replication attempt: 

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


I still have a stability problem, as you can see in the video.  I am using a 103ohm base resistor and one pot is 5k and the other is 2k.  I crank the resistance up to start it and then quickly turn it down.  In this video I have it down all the way and it still gets too wild to control.  Once in a while, it will settle in to a stable spin but then, it begins the wobble that you see.  In a day or two, I will go out and get the pots that Jonny used and go from there.

Thanks again for the help, there is more to do but at least I have rotation and it stands up...just not straight.

Bill