Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[pmgr]

I noticed the same a couple of days ago. The other side has something similar, see attached image. Not sure why there would be a need for any connectors if this is a continuously wound coil. Maybe it is a reed switch?
PmgR

[ARTMOSART]

pmgr
what i point out are in the other side ,go fram by fram on vid 1 at 2'15 .

[jerdee]

Basics of self induction.  When there is a time varying change in current, you induce voltage.  The higher the rate of changing current the higher the value of EMF.   When doing groupings of series and parallel to change current rate of change, you induce voltage on the armature output.  This is how I see it.   If current remains the same in other wiring configurations, you don't allow EMF.  Maybe I'm wrong, but I see a need for change in current THROUGH INDUCTANCE to induce voltage while in rotation.

Jerdee

[seaad]

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[Dog-One]

jerdee,

You're on the right track.  Let me add a couple more pieces to the puzzle...

If you take a transformer, two coils, good coupling and short the 2nd coil, you can pull down the inductance of the first coil to nearly zero.  This is good, but unfortunately it's not enough.  We actually need the inductance to become negative.  We need the 1st coil to act more like a capacitor than an inductor.  Sounds funny, but it can actually be done.

When we short the 2nd winding, observe the direction of current flow.  Now replace the short with something that increases the magnitude of current flow keeping the direction the same.

Seems counter-intuitive right?  Why would we ever want to do this? 

Reactance.

A typical inductor is going to have the characteristics of inductive reactance.  When it does, all the Lenz Law stuff comes into play--CEMF now opposes every change we make to current.  But if we "transform" the inductor into a negative inductor (capacitor), we get capacitive reactance.  Now the CEMF aids every change we make to current.  Think of it as an investment.  We pay with some current to change the characteristics of the inductor and get back an inductor that no longer fights everything we try to do with it.