Magnet motor by pcockriel

[magpower]

Tried that using a ping pong ball with steel bearing inside, I think we will never know and there is more to the picture!

[Jdo300]

Hey Guys,

Here is a big hint. I think what pcockriel made is essentually a permanent magnet form of a shaded pole motor like this:

http://www.mpoweruk.com/motorsac.htm

notice that the core is magnetized to one polarity and there is a copper ring attached on one side. When the AC current changes the polarity of the core piece, the copper ring has eddy currents induced in it which oppose the magnetization in the core. So in effect one side is stronger than the other. This difference causes the rotor (which is usually a solid piece of metal) to rotate.

The only way I could see this working in a permanent magneti sense is if you use the right kind of metal for the rotor. When the rotor "ball" enters the magnetic field, it becomes magnetized the same direction as the magnet's field (if it's ferromagnetic). If you suddendly rotate the ball through the magnetic field, it takes a certain amount of time for the domains in the metal to realign themselves to the field. So for an instant in time, the ball wants to 'rotate' to realign itself with the field when you spin it. So.... If the metal ball retains it's magnetization for an instant, then it is possible that you could induce a current in the copper plate sitting on the magnet when the ball rotates. But in order for this to work right, the magnetic field from the ball would have to be changing (as viewed from the copper plate) in oder for the copper plate to produce an eddy current that could oppose it. If this happened, then you it may be possible to create a rotation like the shaded pole motor.

Just my 0.02

God Bless,
Jason O

[JamesThomas]

the sphere need to be a non magnetic material such as plastic in my opinion

Tried that using a ping pong ball with steel bearing inside, I think we will never know and there is more to the picture!

In the first few pages of this thread, Paul made it pretty clear that it is a hollow metal ball that he used, no bearing inside. The steal bearing in a plastic cup which was in the video, was only for demonstration purposes. Freezer's graphic on the previous page depicts the actual mechanism well.

Did anyone else see the other video Paul Cockreil had on youtube of the small glass gravity engine filled with liquid which he describes on page 2 of this thread as:  "I have gave away another Idea that may be easier for everyone, Its so simple a kid could build it, it has two floats in a tube with a weight in the middle,
the weight floats up the tube , the top becomes top heavy and flips over and it repeats forever!!!!!
This is no joke I posted a demo youtube.com/pcockriel..."

The video didn't show the tube spinning long enough to tell if it was continuous as he said it was. I was hoping he would reveal a bit more about it, but he didn't. Mysterious fellow, that one.


j

[chrisC]

Tried that using a ping pong ball with steel bearing inside, I think we will never know and there is more to the picture!

I tried that too. Different ping-pong ball sizes and steel ball bearing and different cup sizes & material. B. But no cigar! Not even close.

cheers
chrisC

[magpower]

Hi PCOCKRIEL,
good work !

By the way,
what are you exactly doing here ?
I looked at it now 3 times but I don?t understand,
what you stick into the copper tube ?

http://www.youtube.com/watch?v=Dd4BtqeEEww

Please advice.
Many thanks.

Question: was this a battery driven device and can please describe what you saw. I never saw this video and I think you were the only one.

Thanks
wayne