Steorn demo device

[pinestone]

The rotor has two 1/4" ceramic ferrite spheres 180 deg apart..

They are polarized opposite each other, and their fields are parallel.

N----S
    --
    --
    --

    --   
    --
    --
S----N

The 'pendulum' magnet is a 2 T NEO cube with the south-seeking pole facing the rotor.

[Liberty]

Nice video Pinestone,

Looked like it started on the attract pole on the rotor and the stator pushed across to the repel side to cause the repel field to rotate the motor 180 degrees to the next attract magnet.  Then when the stator was pushed back the other way into the repel side of the rotor the same thing occurred to complete a cycle. 

They must of used the weights on the toy for energy input to switch the poles?

[pinestone]

I'm not sure if they used a weight to start the process, or if they need angular momentum to keep it spinning in the same direction.
That's why I added it to mine.

The rotation becomes unstable when I try and pick up a heavy weight on a string, but it will wind up a small weight.

Plenty of room for refinement. I built mine out of a scraped vhs camcorder.
Aluminium against aluminum wastes a lot of energy. I need to put a set of low friction rollers in there and make the pendulum magnet solid. Duct tape is for Red Green. ha ha

is your pmm continuing to run since you built it?

[Liberty]

I'm not sure if they used a weight to start the process, or if they need angular momentum to keep it spinning in the same direction.
That's why I added it to mine.

The rotation becomes unstable when I try and pick up a heavy weight on a string, but it will wind up a small weight.

Plenty of room for refinement. I built mine out of a scraped vhs camcorder.
Aluminium against aluminum wastes a lot of energy. I need to put a set of low friction rollers in there and make the pendulum magnet solid. Duct tape is for Red Green. ha ha

is your pmm continuing to run since you built it?

@Pinestone,

I have not run my permanent magnet motor continuously since 2005 but on and off.  I took it apart because I am trying to move to a new location and to reuse some of the parts in the next model.  The next models have a low power electronic control circuit that I developed and tested that uses an infra-red light sensor for timing and much better motor precision.

I did run my original 'toy' for several hours per day for about a week and took some walk around movies of it running with a digital camera.  (The movie posted at the web site only shows that it rotates and is a poor video at best).  I use all neo magnets in the rotor and stator (and what appears to be a bit different approach than Steorn).  The permanent magnets provide rotational gain in this motor.  It was my version of a 'toy', but it turns at about 400 RPM @ about 1.44 watts input rather than cycle start and stop. 

My version uses a low power method instead of strictly a mechanical method. 
With more magnetic modules, I think it will improve the torque of the device (as opposed to my first toy), much better and stronger due to one stage driving the next.  I believe that using a low power method provides greater precision (resulting in greater efficiency) in the motor and much more control, and with the option of variable output capability.

Hope things go well for you on your version of the device.  Nice pictures.

[CLaNZeR]

I have not run my permanent magnet motor continuously since 2005 but on and off. 

Hi Liberty

I just checked your site, very nice.

Did you ever release more info on your design in these forums?, if so a pointer would be good as interested in having a look.
If not then fair enough as tis fair enough.

Regards

Sean.