Thane Heins Perepiteia.

[OilBarren]

"By Faraday's law, the voltage on the coil is the rate of change of flux through the coil.
It doesn't matter one bit that the flux is confined to the shaft.
That's why transformers work, eh?"Cheers, Mr. Entropy

YES BUT TRANSFORMERS USUALLY DON'T  ROTATE AT 1000 RPM DO THEY?

Thane.

[OilBarren]

"By Faraday's law, the voltage on the coil is the rate of change of flux through the coil.  It doesn't matter one bit that the flux is confined to the shaft.
That's why transformers work, eh?"
Cheers,Mr. Entropy

I BELIEVE I POSTED A DIAGRAM OF THE RUNNING ANALYSIS OF A SPLIT PHASE INDUCTION MOTOR A WHILE BACK?

IF YOU LOOK AT THE CROSS SECTION OF THE DRIVE SHAFT IT WILL HAVE POLARITIES AS SHOWN BELOW:

  N  pole
O  - Drive Shaft
  S pole

EVEN IF YOU COULD CREATE A BRUSHED SYSTEM FOR READING YOUR DRIVE SHAFT COIL OUTPUT - THERE WOULD BE NO OUTPUT BECAUSE THE TOP HALF OF THE COIL'S INDUCED CURRENT WOULD BE CANCELLED BY THE BOTTOM HALF.

THE DRIVE SHAFT FLUX DOES NOT TRAVEL INTO AND OUT OF THE "PAGE" O AS IT WOULD IN A TRANSFORMER - BUT RATHER IT IS FLIPPING AS SHOWN BELOW:

  N 
O 
  S


  S 
O 
  N


  N 
O 
  S

Thane

[aether22]

"Also, it would be worthwhile measuring the magnetic flux in the shaft,"

PB

OK PB NOW TELL US HOW TO MEASURE FLUX INSIDE A STEEL SHAFT?
I SAY IT CANNOT BE DONE.
WHAT DO OTHERS SAY?

Thane

[/quote]

A stationary coil over the rotating shaft would give you changes in the magnetic field (regardless of the fact that the flux appears to stay in the shaft).
But it would not give you the intensity of the magnetic field.

The posting from you (Thane) above in reply to Mr.Entropy has no bearing (forgive the pun) on the truth that you can read the changes in flux through a shaft. (but not the absolute value unless you start from zero flux and carefully record all voltages)



NOTE: My post above this one has several important additions in case you didn't notice them.

[aether22]

ALSO 1 MORE THEORY PLEASE...
WHY DOES THE ROTOR IN DEMO 2 SPIN FASTER AFTER THE STEEL BAR IS INSERTED BUT BEFORE THE COIL IS SHORTED?

Thane

Because your coil cores support eddy currents and are hence always shorted to an extent.

[aether22]

The drive-frequency theory explains that too. Higher frequency means higher slip, which means higher torque, which delivers the acceleration you observed. It does not require additional electric power input because some of the power that was formerly being dissipated as heat is instead accelerating the motor.

ONE FINAL THING...
HOW DOES A DC MAGNETIC FIELD (WITH NO FREQUENCY) ACCELERATE THE MOTOR IN DEMO 4?

Thane

Note the extreme weakness of the effect which to get you had to remove the face plate of the motor despite the fact that the magnetic field delivered by the neo's is HUGELY stronger by probably at least 500 times than any back emf from the coil (assuming your table is not a magnetically permeable steel).

Also WRT my theory magnets do create some aether flow.