Confirming the Delayed Lenz Effect

[DeepCut]

Nice one keyho. The position of the core will change the inductance of the coil to a certain extent.

[DeepCut]

Good book on transformer engineering, lots of explanations, doesn't just rely on maths alone and includes phase-shifting transformers :

http://www.mediafire.com/?6ikmb55t92wixr8


Best to all,

DC.

[CRANKYpants]

"Until one is committed, there is hesitancy,the chance to draw back, always ineffectiveness. Concerning all acts of initiative and creation, there is one elementary truth, the ignorance of which kills countless ideas and splendid plans: that the moment one definitely commits oneself, then providence moves too. All sorts of things occur to help one that would never have otherwise occurred. A whole... stream of events issues from the decision, raising in one's favor all manner of unforeseen incidents and meetings and material assistance which no man can have dreamed would have come his way. Whatever you can do or dream you can begin it. Boldness has genius, power, and magic in it. Begin it now." ~ Goethe

[ramset]

Boss
Truer words have rarely been put to print !!
Thank you for sharing this inspiration!!

Chet
PS
I'll be posting this in the mens room over the Urinal!!

"Until one is committed, there is hesitancy,the chance to draw back, always ineffectiveness. Concerning all acts of initiative and creation, there is one elementary truth, the ignorance of which kills countless ideas and splendid plans: that the moment one definitely commits oneself, then providence moves too. All sorts of things occur to help one that would never have otherwise occurred. A whole... stream of events issues from the decision, raising in one's favor all manner of unforeseen incidents and meetings and material assistance which no man can have dreamed would have come his way. Whatever you can do or dream you can begin it. Boldness has genius, power, and magic in it. Begin it now." ~ Goethe

[woopy]

Hi all

@Kehio very nice job bravo. Hope to get more results soon.

OK today i decided to make a second serie of test.

First i doublestacked  the magnets on the rotor to get more flux

Second i changed the prime mover motor for a stronger one

third i made the measurement through a FWBR and a 1 ohm resistor ( see the pix and the shematic at the bottom of the result pix.)

So  in this new setup the threshold seems to be at around 865 rpm.

Under this speed the rotor begin slowly to slow down and goes down to very low rpm (about 230 ) and during the deceleration the current increase from 470 ma up to 570 ma.

But above the threshold the rotor accelerates.

So i made the test at 6 than 7 up to 11 volts dc on the prime mover.

And as you can see on the result sheet , the acceleration is much stronger at 10 volts than at 6 volts.

It is a pitty because at 2600 rpm i heard the bad "CLAACKK" followed by a special woble , which indicate me to immediately stop the test before beeing tranperced by some furious ejected magnets  Youp!!

But i wonder what would happen if i could go much faster. I mean when we go higher above the threshold , the acceleration is even stronger.

(at 6 volt, i  can only accelerate from 950 rpm up to 1087 rpm that is an increase of 137 rpm,  but at 10 volts i go from 1197 up to 2438 rpm that is an increase of 441 rpm

What would the rpm  increase be at 20 volt ??

Of course in this test i did not take account of the increasing output of electrical energy from the coil. But i can  spin  the same DC motor as the prime mover  (slowly ) with a propeller.

I will re-re-watch the Thane's video to try to pick up some more explanation of this phenomen. And improve my test bench.

ok for today

good luck at all

Laurent