Confirming the Delayed Lenz Effect

[CRANKYpants]

Bravo also for your test. Yes it is really fantastic and somehow disturbing  to feel the effect in our's hands.

YOU ARE ALL JUST A BUNCH OF FREAKIN' INTERNATIONAL LAW BREAKERS   

T

[DeepCut]

OK i stabilised the test-bed.

I put two wooden blocks (yes it's all very high-tech !) under the base-plate to stop it flexing when the coil is placed there.

I also cut a new shaft (carbon rod) that is longer, so there is more room between base-plate and top-plate and the coil isn't squeezing up the top-plate.

I seem to have lost a few tens of Hz though, top speed has dropped to 412 Hz. Maybe that happens with a longer shaft, i don't know anything of mechanical engineering.

It's interesting that you get the best speed from the magnet when it's center is above the drive coil center. Is the magnetic field strong at the 'curve-out' than it is at TDC of a coil ?

So the results aren't as dramatic, but the effect is still there, the coil still 'over-speeds' the rotor.

All previous tests have shown that the higher the impedance, the stronger the effect so i will buy a kilo of wire for the next test.

I stuck a voltmeter on the gen-coil and it read 272 VAC, i haven't bothered measuring current since this gauge of wire won't be used for getting power out, but it's probably micro-amps rather than milli.

I'm going to test the addition of a capacitor now.


** EDIT ADD **

Oops, forgot results !

First stable test-bed test, 21/10/2011.

No coil/core present.

Hz   : 412
mA   : 411

Coil/core present, open-circuit.

Hz   : 400
mA   : 415

Coil/core present, short-circuit.

Hz   : 414
mA   : 409

10 Ohm load resistor.

Hz   : 422
mA   : 404

30 Ohm load resistor.

Hz   : 420
mA   : 405

100 Ohms load resistor.

Hz   : 420
mA   : 405


Onward And Upward

DC.

[kEhYo77]

DELETED double post

[DeepCut]

Tested the effect through a stepdown AC-AC transformer then rectifier, got speedup but no overspeed.

One thing i don't understand is, i am measuring no current at all.

I have one meter setup to read voltage, with a 10 ohm resistor between it and the gen coil.

Another meter for reading current, is clipped to either leg of the resistor.

Am i doing something wrong with the power measuring ?


Cheers,

DC.

[kEhYo77]

I just did 2 test runs. At first I couldn't replicate the speed up from my previous setup at 950Hz. I started thinking what changes did I make. And it became clear. The core length in front of the coil has shortened! I readjusted my coils a little to the back and Bingo! The effect came back, starting from around 800 Hz. So the Lenz delay has got much to do with that sticking out piece of the core for the most part, I think. At least in my case.

Look at WoopyJump's latest vid how far to the back his coil is...