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Variable strength permanent magnet

Variable strength permanent magnet
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I recently read about a switchable (ON/OFF) permanent magnet. [link]

This intrigued me, and caused me to imagine a half-baked version, the variable strength permanent magnet. Simply include a variable control to adjust the relative positions of the two magnets, and viola!

Not to be confused with magnetic monopoles.

csea, May 05 2015

(?) ON/OFF permanent magnet http://us9.campaign...a44399&e=42d7a30a0c
Inspiration [csea, May 05 2015]

[link]






       This is already Baked to a certain extent by winding a coil around a permanent magnet and then passing a current so that the resultant field opposes the permanent magnet.   

       It means that the force can be varied from zero, through P which is the force of the permanent magnet with zero coil current, to P + D where D is the additional force of the coil at maximum current.   

       This is pretty much how remanence relays work.   

       The coil must not heat the core above its Curie point.
8th of 7, May 05 2015
  

       The "on/off" magnet assemblies linked (well, linked to the link) don't come right out and say it's variable, but it sure looks that way.
FlyingToaster, May 05 2015
  

       Would a half-on magnet have East and West poles?
MaxwellBuchanan, May 06 2015
  

       East Poles? Blimey, is everyone carving off a chunk of Ukraine nowadays?
bs0u0155, May 06 2015
  

       It does look likely .. we'll Czech on it and get Baku to you ...
8th of 7, May 06 2015
  
      
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