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Old 07-21-2012, 04:57 AM
Farmhand Farmhand is offline
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Join Date: Jun 2010
Location: Australia
Posts: 3,387
Hi Carroll, As far as motors go I think they are already quite efficient, there
is benefit to recovering the coil collapse from switched coils, but from what I see
if the motor is pulsed the max power is reduced, and when loading a
pulsed motor if the motor tries to maintain speed the input power will increase
and the recovered energy will be more. When a pulsed motor with recovery is
accelerated by increasing the voltage input, the recovered energy is less.

This all tells me there is no free energy in a motor, all that is possible is closer
to 100% efficient. Motors are for delivering shaft power and if we reduce
maximum input power we reduce maximum shaft power, it's the in between area's where
people see what appears to be extra energy because they reduce the input
by pulsing or removing windings and recover some energy, but under full load
at full power they cannot perform as a regular motor would in my opinion, only
slightly or partially loaded motors can afford to lose "on" time to get the
recovery in my opinion and I doubt it will ever be more out than in in a modified motor.

To improve a motor I think it needs to keep the same shaft power or more
and reduce input. Testing shaft power is not simple, using a generator could
work for testing but won't give a hard figure to compare so I have little
expectation any improvements will be made unless to already inefficient
motors. Almost a waste of time trying to improve on 97% efficient.

Cheers
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