h a l f b a k e r yA dish best served not.
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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.
(?) ON/OFF permanent magnet
http://us9.campaign...a44399&e=42d7a30a0c
Inspiration [csea, May 05 2015]
[link]
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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. |
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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. |
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This is pretty much how remanence relays work. |
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The coil must not heat the core above its Curie point. |
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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. |
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Would a half-on magnet have East and West poles? |
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East Poles? Blimey, is everyone carving off a chunk of
Ukraine nowadays? |
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It does look likely .. we'll Czech on it and get Baku to you ... |
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