Thane Heins Perepiteia.

[Heinstein]

Are you sure that your steel bar is increasing the voltages in your output coil because of some very low back coupling of bemf to the motor? The effect could very well be the fact that your motor become more efficient because the steel bar is improving the magnetic field in your motor because of a strengthening of the rotor field in the motor itself.

YES EXACTLY THE NEW DRIVE SHAFT FERROMAGNETIC MATERIAL IS DECREASING THE AIR GAP RELUCTANCE BETWEEN THE STATOR AND ROTOR BUT NOW THE NEW ROTOR WEIGHS ANOTHER 10 lbs (ROTOR WEIGHT + MAGNETS + COGGING TORQUE) - RIDDLE ME THAT ONE BATMAN?

I ask because when I put a Ferrite to the end of my coil I get more core mass to the coil and my voltage goes up because of that. In my little motor setup I get a voltage gain of approx. 1 Volt by just adding more core to my coil.

YOUR VOLTAGE GOES UP BECAUSE YOU ARE INCREASING THE RELATIVE PERMEABILITY OF YOUR COIL. http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/solenoid.html

So this is a dramatic big effect compared to the back coupling of some low gauss from the magnets. This effect does NOT explain why a motor speeds up when your coils are loaded, just to be clear about that.

THE MOTOR SPEEDS UP BECAUSE THE COIL'S MAGNETIC FIELD CAUSES IT TO DO SO WHEN LOADED (OR SHORTED). THERE MAY BE MORE THAN ONE TERTIARY REASON BUT THIS IS THE BROAD ONE.

One way to test this is by running the motor without any load at a preset voltage. Measure the rpm before and after a steel axle is connected to the motor.

GOOD PLAN!

@PulsedPower,

Yes, everything is exspencive in Norway. 
By CRO you mean a Catode Ray Oscilloscope?

Groundloop.

[/quote]

[Heinstein]

When I short the coil the motor stops.
Groundloop.

SO KNOW YOU KNOW THAT MOTOR TYPE DOES NOT WORK BUT LENZ'S LAW DOES.
NOW CHANGE MOTORS UNTIL YOU FIND ONE THAT DOES WORK.

Thane

[Heinstein]

Anyway it may be that the accelleration effect due to any flux entering the motor is weak and it is totally swamped by the strong pulsating pull of the magnet to the shorted coil. The system that Thane was demonstrating had plenty of inerita compared to the pulstations of the magnets interacting with the coil pole pieces.

THERE IS A THRESHOLD SPEED AT WHICH:
BELOW THIS SPEED = DECELERATION
ABOVE THIS SPEED = ACCELERATION

THIS THRESHOLD IS A FUNCTION OF THE MOTOR - SO YOU HAVE TO GET INTIMATE WITH YOUR MOTOR AND FIND THE RIGHT SPOT. TRY A VARIAC OR BREAK BREAK OUT THAT VIBRATING DRILL.

The other thing I noticed with Thanes setup was that it was a bench grinder, these typically have aluminium end closures meaning that any magnetic flux can easily enter the rotor, If I am not mistaken you motor has a pressed steel end closure which would act as a magnetic shield with an effectiveness that increases with thickness and permeability.

Thanes motor is also running with massive slip (98.5% @ 60 rpm) and may behave very differently to a motor running closer to its design slip.
[/quote]

THERE IS NO DIFFERENCE WITH SPEED (OR SLIP) IF THE THRESHOLD SPEED IS IDENTIFIED.
THE EFFECTS ARE STILL THERE AT HIGH SPEEDS BUT LESS NOTICABLE DUE TO THE STORED INERTIA IN THE ROTOR - SO A VIDEO DEMO WOULD BE MORE BORING THAN IT ALREADY IS.
WE ACTUALLY CUT OUT SOME FRAMES IN PART 1 TO BECAUSE THE ROTOR DECELERATES SLOWLY OVER TIME.

Thane

[Heinstein]

I agree with you about the difference of a motor that runs at slow speeds vs full speed. If the Thane effect is only visible when using a motor at slow speeds then it will be impossible for my motor to show the effect at full speed. I will try to slow down my motor.

IF YOUR SLIP ANGLE IS ZERO (OR VERY CLOSE) HOW CAN YOU INCREASE SPEED BEYOND THAT?

Thane

[Heinstein]

Are you sure that your steel bar is increasing the voltages in your output coil because of some very low back coupling of bemf to the motor?

THE STEEL BAR IS INCREASING THE VOLTAGES IN THE COIL BECAUSE THE ROTOR IS SPINNING FASTER AFTER THE STEEL BAR IS INSERTED THAN BEFORE.

MOTOR INPUT HAS NOT INCREASED BUT THE SPEED HAS INCREASED SO MY GENERATOR COIL IS ADHERING TO FARADAY'S LAW OF INDUCTION.

NO STEEL BAR = 70 V
STEEL BAR       = 90 V

REASON = INCREASED ROTOR RPM

INCREASED ROTOR RPM REASON = STRONGER MOTOR ROTOR FIELD DUE TO MAGNETIC COUPLING OF PM ROTOR TO MOTOR DRIVE SHAFT AND MORE TORQUE = ACCELERATION.

Thane