Magnet coil cores, demagnetization power and Lenz delay.

[synchro1]

Although not the purpose of the video, around 2:10 into it he maintains his magnet core speeds the rotor up 25%.





http://www.youtube.com/watch?v=W7rsb0Q9thw[/size]

[skycollection]

COMPRESSED RODIN STARSHIP COIL IS PHYSICALLY ANOTHER COIL, IS A "SPIRAL" COMPRESSED COIL...!
https://www.youtube.com/watch?v=LkFk265MMU0


SALUDOS
FROM MEXICO, JORGE REBOLLEDO

[synchro1]

Apparently no Lenz drag!

An E core acts as the magnet:

https://www.youtube.com/watch?v=z4hOlUzrY4I

[synchro1]

Quote from Mariuscivic:

"The input is 12V/118mA.
The output is 1.7V and just enough curent to lit the led.
The idea is that at the right distance , the coil is not seen by the rotor".

"At the right distance , the coil is not seen by the rotor"

The E core directs a vectored magnetic field through the solenoid  output coil at 90 degrees, like a diametric core magnet would. This mid coil magnetic hurdle retards the pole shift and hides the output coil from the "Lenz Drag". The "E" core manufactures a field at a right angle to the axis of the output coil. The diametric PM output coil core accomplishes the same thing! Both lateral fields slow the timing of the pole reversal in the output coil. This allows the rotor to slip by the grab spot.

[synchro1]

@MarkE,

I resurrected this old thread of mine to answer the question you posed on the Pulse Motor Build off thread.

Quote from MarkE from the "Pulse Motor Build off Thread":

"Synchro, magnetic viscosity is a loss mechanism.  It can be modeled as either a force that opposes the motion, IE like friction it always points against the direction of motion, or it can alternatively be modeled as a magnetic field that always opposes change in the actual magnetic field.  Again that acts as a loss". 

@MarkE,
This was a good thread, but the page grew oversized somehow. I'm going to ask Stephan to try and fix it before I respond.