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Author Topic: Electronically generate rotating magnetic fields  (Read 26847 times)

Offline mscoffman

  • Hero Member
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  • Posts: 1377
Re: Electronically generate rotating magnetic fields
« Reply #15 on: November 27, 2012, 06:50:23 PM »
I was thinking about standard synchronous AC motor/generators, which
literature sometimes claim have "rotating magnetic fields" working inside
them. What exactly is a rotating magnetic field? One way to think
about this is to have the motor/generator field wound in a spiral form.
*So that a "magnetic node" will  move about in X,Y,Z physical
space in the core material depending on the sinewave phase of the
driving signal*. This physical motion would inevitably called be
rotation because eventually the phase of an AC driving signal will
come around to repeat itself and the physical motion of a magnet node
will repeat itself at the same frequency. Until someone convinces
me otherwise, I regard this as a model of a rotating magnetic field.

An interesting question is would an AC motor armature that could be spiral
wound to match the field coil, then replacing that motor armature with a straight
strong permanent DC magnet, would that new rotor rotate along with motor's field flux?
I think the answer is; Yes, but the moving magnetic field node would have a tendency
to erase the permanent magnet by locally overheating it because the particular
polarity of the magnetic node will be concentrated on one small and moving
physical area of the permanent magnet of the rotor when it is under load.

:S:MarkSCoffman


Dave45

  • Guest
Re: Electronically generate rotating magnetic fields
« Reply #16 on: November 27, 2012, 09:01:17 PM »
This should work driving two sets of coils out of phase.
The driver also includes the choke SM put on top to draw the aether.
A choke stops high frequency from passing into an ac circuit, think about that, how does it stop hf,  ;)
Is there an electric field that orbits the chokes magnetic field at 90 degrees, I'll bet there is.

I too have been thinking on the tpu

coil windings and direction play an important role.