At 02:46 PM 1/17/2010, Abd ul-Rahman Lomax wrote:
On Jan 17, 2010, at 12:06 PM, Harry Veeder <[email protected]> wrote:
How do you know? With regular bearings it may require more energy
then the system can
generate.
Isn't that my point? They are drawing relatively high power from the
battery. If all of that ends up as heat, and twice as much is going
into rotational energy, there should be no problem with bearings. But
hey , if I have the math wrong, let's say they haven't given us the
info to show it. I didn't do actual calculations, just seat of the
pants estimation.
Suppose that Sean is right. So, they put a controllable brake on the
rotor. It could be done by using an induction coil to extract
rotational energy from the rotor and dump it into a resistor to
generate heat. They let the thing fire up, then move the induction
coil in until rotor acceleration is zero. Or lower the resistance
value until that point.
How much power is being extracted from the battery? How much heat is
being generated there (mostly in the toroids)?
And how much heat, in this steady-state situation, constant RPM, is
being generated in the resistor?
If Sean's claim of 2:1 is correct, say at some rotational rate, then
twice as much power would be dissipated in the brake resistor. Very
easy to measure the resistor dissipation, the waveform would be
simple, no complications at all.
But this is what classical understanding would predict: the resistor
would be dissipating only a small fraction of the energy being
dissipated in the toroid circuit, representing some small deviation
from the claim of 100% generation of heat of the current in that
circuit. Some (small) fraction of that current is converted into
rotor energy. And that's why very low friction bearings are required.
It's a very low percentage, and being so low, it's not easy to see,
the measurement accuracy would have to be high, and with transients,
which is where it's happening (during the turn-on and turn-off of the
circuit), such measurement is quite difficult.
This is what I'd predict if careful analysis is done: the continuous
energy that can be extracted from the rotor, by the induction pickup,
is within the noise in the measurement of energy input from the
battery, minus energy dissipation in the toroid circuit, or it is
observable as a deficit from that circuit, missing energy there, as
would exist with a "classic pulse motor."
There would be a smaller missing component of energy, so the
efficiency isn't actually 100%, because some energy will be radiated
as RF. So (work in the toroid circuit) minus (work in the induction
circuit) will be positive, if measured accurately enough, or will be
in the noise, if not. If Sean's claim is true, this difference will
be very negative, the dissipation in the pickup coil will be double
that in the toroid circuit.
Simple hypothesis to test. Now, obvious question that will be asked,
and this kind of question has been asked many times. "Why haven't
they thought of this?"
Well, I assume that they have thought of it, if fact, the alternative
is to assume that in spite of having the money to bring in serious
expertise, they are seriously stupid. And I rather doubt that.
Abd's version of an old maxim:
Never ascribe to stupidity what may be effective marketing.
