Confirming the Delayed Lenz Effect

[wings]

Hi Luc,

So far I forgot to think of the effect of a shorted coil in case of these transformer tests you have been doing.  Normally a shorted coil or heavily loaded coil reduces all the other coils self inductances on the transformer because of the counter-flux (Lenz law).
You can test this with your L meter connected to say the primary and short the MOT secondary, you may have to see the primary 76-80mH normal inductance value drops to the 10-12mH range (if you indeed measured 76-80mH when the secondary was an open circuit).

A "problem" still seems manifesting in case of the second scope picture you uploaded whereby the f=46.3Hz, 60uF is in parallel with the primary and the secondary is unsorted. In this case the LC resonance calculation gives 196.9mH primary inductance: why did it "increase" so much wrt the 76-80mH? There was no shorted coil then.

Thanks for your nice video.

Gyula

effect of a short circuit on the secondary:

http://www.cliftonlaboratories.com/ferrite_transformers.htm

[Overunityguide]

So if this is Lenz Law happening then where is the Delayed Lenz Effect Overunityguide is talking about?

Also Gyula, would you know why Overunityguide does not see any reason a higher Primary Inductance value would not be any better?... I just can't get my mind around that

@Luc,

Please lets do some calculation on the MOT experiment. In my calculation of the Lenz Delay video, you can see that we can use L/R.

So in the MOT experiment let assume that we are using: 25H as a secondary coil, with an internal reassurance of 300 Ohms. And that we are using 200 Ohms as a load connected to the secondary coil.

This would give us a delay of: L/R = 25/(300+200) = 50 mSec.
To develop a back EMF of around: 63%

If we are using 950Hz in this case, than one period will take you:
1/F = 1/950 = around: 1mSec.

So when you compare the 50 mSec with the 1 mSec, than you can see where the Lenz Delay is coming from...

And further, the secondary MOT transformer coil also has internal capacitance. So this internal capacitance in combination with the secondary induction will create resonance inside the secondary coil.

With Kind Regards, Overunityguide

[CRANKYpants]

And further, the secondary MOT transformer coil also has internal capacitance. So this internal capacitance in combination with the secondary induction will create resonance inside the secondary coil.

With Kind Regards, Overunityguide

DEAR OUG,

I HAVE ANOTHER JOB FOR YOU FOR WHEN YOU GET BACK FROM YOUR BUSINESS TRIP THIS SATURDAY. 

MAKE A BI-FILAR SERIES CONNECTED SECONDARY COIL FOR YOUR ORIGINAL LENZ DELAY TRANSFORMER SO YOU CAN SHOW HOW THE BI-FILAR WOUND COIL DIFFERS FROM THE HIGH IMPEDANCE SINGLE WIRE WOUND COIL.

CHEERS
T

[gyulasun]

...
I hooked up my variable Inductance meter to the Primary and tonight it reads 70mH.
Then I connect the 60uf Cap and it reads (minus) -26mH.
Then I short the Secondary coil and it reads 17.2mH.
Then I remove the Cap and it reads 11mH

So now it is clear why the Capacitance needed to be so high.

Hi Luc,  thanks for this test, this then explains the difference between my calculations and your measurements.

So if this is Lenz Law happening then where is the Delayed Lenz Effect Overunityguide is talking about?

Please ask him to explain it and also that how could it be utilized in practice for instance in case of a microwave oven transformer. I know he showed the LED lamp test in the video but a much higher power load would be much better to test.  I think the crucial point is how such a setup is connected to the mains:  via what means? so that the power factor should stay near zero to consume reactive power...

Here is an interesting animation to show resistive and reactive power in an AC circuit where you can choose between R, L, C and series RL or series RC components as the loads and see that when (in case of reactive components) they return power towards the mains:
http://www.circuit-magic.com/acpower.htm 

Quote from the link:
"... as the current through an inductor increases from its zero value to its maximum value the field around the inductor builds up to a maximum, and when the current decreases from maximum to zero the field collapses and returns the power to the source. You can see therefore that no power is used up in either case, since the power alternately flows to and from the source."

Also Gyula, would you know why Overunityguide does not see any reason a higher Primary Inductance value would not be any better?... I just can't get my mind around that one.

Probably he considers using much higher operational frequency for a transformer than 50 or 60 Hz mains frequency and if this is so then a lower inductance primary poses much less drawback in this respect.

Gyula

[ramset]

Geeezz ,
Poor OUG ,He's like Cindefellah!
Work ,work,Work...........
------------
@Boss
I think we can get you in the movies!!

http://www.youtube.com/watch?v=OibqdwHyZxk

You could play one of the good guys      <- {Good Guy]

Chet