Reversing Lenz Project

[Jim Mac]

 I don't yet get why it will be attracting on its way in. I'm guessing on entering the coil, the strong north that is decreasing will encounter an initial strong north in the coil that will decrease as the metal reaches the center of the coil. 

Interesting in seeing this build continue.

During the entering stage (causing the magnetic field collapse)   The coil is far enough from the center of the magnet to barely notice any of the rotor's field growing to TDC of the magnet. Whatever it does notice will be filtered out with a diode.  So none of the initial growing field will influence the rotor. Then as the rotor approaches TDC of the coil, that field in the rotor is dropping according to the reverse square law. 

" that is decreasing will encounter an initial strong north in the coil that will decrease as the metal reaches the center of the coil"

A coil's induced current is not linear with distance. You can verify by using your function generator to create a positive biased sinewave and feeding it into a transformer.  Scope the input and output.  You should notice Single polarity wave coming IN, and a full 2 polarity sinewave coming out.  

Although I do agree at this point the majority of the advantage will probably be on the going out field growing. 

Think of this:  Growing North = Shrinking South  and Growing South = Shrinking North.  The coil has no care what side the bias charge is on, only if it is growing or shrinking.  And the output current is only dependent on the amount of magnetic change.

Test-  Hook a coil to your scope.  Take a magnet and Push the north field IN.  Observe the direction of the current.  Now flip the magnet so South is facing the coil and Pull the South Away.  You will notice pulling away produces the exact same way current with equal intensity between both tests.

Overall, you may have a point that the incoming may do little to nothing in aiding us.  Even so, all current that hurts rotation can be filtered out with a simple diode.

I am close to testing stage, but now my work week starts. But soon I will have more