Does anyone know what the difference is between ferrite cores and powdered iron cores?
Powdered iron cores are usually compressed into shape and have a naturat air core around each particle. The saturation curve is softer or slower.
Ferrite (probably better classified as soft iron) cores have less air in them as they are kind of cast. the saturation curve is sharp or fast.
But don't quote me because I barely know any of this stuff
JB calls this motor snake oil. From his POV I can see why he says that.
But there is always more than one way to look at things. I am interested in both the Steorn motor and JB's type "A" motor. I think they both have something to offer.
On the subject of the Magnetite I spoke of. I know the material is not as good as the high tech materials they are using these days but it is a natural mineral and the most magnetic natural mineral on earth. So to me, that makes it "Green".
I find this mineral has some interesting qualities.
The one that sticks out the most is that it is ferrimagnetic. This allows the material to switch polarities better than a ferromagnet material. In the steorn motor, that is actually what they are doing with the torrids right? Changing the magnetic polarity of the attraction material so the magnet looses its bond.
Since each grain of magnetite is naturally polarized (not magnetized), I thought just for fun I would try this in a couple cores. Setting the mold on some Neos that are stuck to a piece of steel with all the N sides up, I should be able to freeze all the grains in place with some epoxy, all going the same way.
Now whethere this is will do anything I do no know but using the right hand rule to wind the torrid, I thought it would be a fun experiment.
regards,
Murlin
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