Homopolar with only permanent magnets, and no battery?

[Low-Q]

This experiment did not work. So I continued to research the reasons why a homopolar motor works.


I made a simple test with the traditional single wire. The magnet hangs in a screw.
I then went furter by making a coil with som 10-ish windings, and connected the wire ends like normal.


In the first part the magnet spins out of control as expected.
In the second part, with the coil, the magnet is so much more i fluenced by the electromagnetic field. So it starts to wobble heavily. Acts like a pendulum as the magnet tries to align with the much stronger electromagnetic field. It looses connection periodically and therfor swings back and forth.


I try to understand the magnetic connection the wire and the magnet has. I think I have figured it out.


South is pointing up, so the field goes ccw on right side and cw on the left side. The current throug the wire flows upwards and create a magnetic field ccw seen from above.


This will force the magnet to spin.


In my permanentmagnet experiment, this wire is replaced with magnets. Even if we would think it should work, and think a magnetic field is a magnetic field, they are not the same. Fields from an electromagnet is different. Because I cannot replace the electromagnet in a homopolar motor with a permanetmagnet that assumingly should do the same thing.


A video of the homopolar motor experiment:
https://youtu.be/Ca5KhC95owI


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