Wednesday, January 2, 2013

[Electric Boats] Magnetic Circuits & The Prototype Motors

 

Hi, .........but wouldn't even simplistic thinking give you a time
factor in there so that the influence between the magnet and the electro
parts as the motor rotates mean that adding magnets might merely smooth
out power pulses, as each pull/push 'association' has less time to do
the work? Whereas adding batteries increases the magnetic field area
covered and it's power while consuming more electrical power?
I have a gut feeling that a motor of larger then normal diameter, to
give more torque per 'association' with some different propeller
thinking might give better efficiency. Obviously, such a motor might
have more magnets, but only to fill in the space created by having a
larger general circumference, and thus maintain the current distances of
field-to-field. Current motor designs, like ICE designs, are perhaps
based upon having excess amounts of power being allowed to be consumed.
Again, thinking in basic terms, an electric motor only uses
electro-magnetism because it is switchable, and conventionally one of
the two main parts need the magnetic field to be switched on and off.
Thinking outside of the box, possibly also outside the scope of this
group, maybe a motor could use permanent magnets on both components, and
use the electricity to kind of mechanically change the magnetic field
distance of influence maybe by individual pole rotation or it's
shielding somehow?

John

1a. Magnetic Circuits & The Prototype Motors
Posted by: "Roger L"
rogerlov@ix.netcom.com[mailto:rogerlov@ix.netcom.com] roger_scotty
Date: Tue Jan 1, 2013 6:18 am ((PST))

The discussion of the Gemini Motor makes a good sounding board for some
magnetic discussion. I've followed some good electrical discussion on
this forum, but there's been little on magnetic side.

Looking at the Gemini site, part of Gemini electric motor prototype
seems to work around the idea of incorporating extra magnets into the
magnetic field circuit.

On the face of it, the idea makes sense. Common sense says that
adding magnets to a magnetic circuit might will work in much the
same way as adding batteries to an electric circuit. And we already
know from experience that adding more batteries increases the
ability to do work.

But magnetics doesn't work quite the same way. It turns out that adding
batteries works to advantage for a couple of reasons that aren't true of
magnets. When a battery is added, the battery's own internal resistance
needs to be low - and it's conductivity high - compared with the rest of
the circuit. While that happy situation is true for charged batteries,
the analogous situation is not true in magnetic circuits. In fact, all
of the magnetic material we have available so far has a rather poor
ability to serve as a conductor of magnetic energy or "flux". The
materials are said to have "low permeability".

......................SNIP.....................
Enjoy!
Roger Loving

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