Re: Is it possible to use permanent magnets to assist a motors power efficiency?

"Autymn D. C." <lysdexia@xxxxxxxxxxxxx> wrote in message
news:8c0f9a72-2879-43cb-8cb8-589cd1b4e6a7@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
what experiments?
To see if it's possible to use a permanent magnet/magnets flux in
combination with that of a coil/coils do the following.
You will need to make something similar to a rectangular transformer core.
A box of staples, some copper magnet wire, and a pair of appropriately sized
ceramic magnets will do the job. Stronger magnets can be used but you want
to avoid saturating this core.

You should place the magnets so that like poles are in the same direction
with a gap between them big enough to place a coil between the north poles,
and the south poles. About 20 winds for each coil will do. The coils
should be wound in opposite directions to each other.

After winding the coils onto the staples place the magnets either side of
the coils and a row of staples either end so that you have a rectangular
flux path.
At this point you should expect to see that the flux is more or less evenly
distributed around the core.

Now, measure and note the force required to remove the staples from one end.
Now replace the staples.
Using a variable DC source apply a current to the coils. Increase the
volatge untill at some point one or the other end of the core will drop off,
as the flux has been cancelled at that end.
Now measure the force required to pull the other end off, whilst leaving the
coils energised.

I forgot to mention that you will also need some electrical tape or
something similar to hold the core together as you remove the permanent
magnets. Having removed the magnets apply the same voltage that allowed the
end of the core to fall off previously. Now measure the force required to
remove one end of the core.

On examining the force measurements it should now be apparent that when you
combine the permanent magnets and the coils that the force generated is
considerabley greater than when there are only coils, or only magnets. It
is very important that the core is well below saturation when maximum flux
is flowing within the core.

Whilest the coils are energised you will find that flux from both magnets,
and the coils, is flowing through one end of the core. As a doubling of
magnetic flux squares the magnetic force it should be apparent that you can
generate considerabley more force by switching the permanent magnets flux in
combination with the flux of the coils than can be achieved with one or the
other alone.

Bottom line.
You should notice that there is much less current required to produce a
given amount of magnetic force than when no permanent magnets are involved

Is there a video?
I don't think so. But why would you want one. It's very easy to either
debunk or verify with very simple experiments

Is this the livewire-version of
Finsrud's mobile?

Nope.


.

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