Reversible Permanent Magnet created at MIT

[ChileanOne]

Dear Fellows:

This video was forwarded by a user in the Yahoo Free Energy group, but it comes from MIT. Is about a material that is called permanent magnet but can be reversed with a short pulse of current.

The video explanation is much more rich on details.

Could it be the answer to the long pursued OU pulse motor?

http://www.youtube.com/watch?v=DGab9-zDUb8

Really interesting!

[Ergo]

This looks more like a magnetic trick than the real deal. And there's plenty of them on YouTube.
There is just not enough information to make judegement.
A crappy video (not revealing anything of importance) usually tell us they're not being honest.

If it is true we still don't know the power consumption to flip polarity vs the work force from the device.

[pese]

This Info is released...
but it say "nothing , that is to understand with the movie.
GP


A reversible permanent magnet is a magnet that can be turned on and off and can keep either state without external power.

The video begins with the magnet in "on" mode, that is, it is holding the bar on the bottom against gravity. Note that the power supply is off (as seen in the background).

A charge pulse is applied (by switching the DC power supply on then off quickly) which changes the magnet to "off". The bar on the bottom drops onto the table.

We hold the magnet near the bar and it is not attracted to the magnet. (This could have been done more dramatically in the video).

Next, the polarity of the DC signal is reversed (we reach behind and swap the banana connectors) and again a short DC pulse is applied. The magnet picks up the bar off the table.

Although we don't explicitly show it clearly in the video, the power supply is off with the exception of the short pulses that turn the magnet on or off. The rest of the time the magnet stays in whatever state it is in; that is why it is still called a "permanent magnet". This is also how this differs from a solenoid where the electrical input power must be provided any time the magnetic field is on.




Built by Ara Knaian, video by Amy Sun, both of the MIT Center for Bits and Atoms.

[Liberty]

This looks more like a magnetic trick than the real deal. And there's plenty of them on YouTube.
There is just not enough information to make judegement.
A crappy video (not revealing anything of importance) usually tell us they're not being honest.

If it is true we still don't know the power consumption to flip polarity vs the work force from the device.

It looks like to me that it is simply a flux flipping device.  The two magnets are mounted opposite polarity of each other between the two short bars that are bolted together.  The bar with the coil is the 'bias' (designed like the gate of an SCR) that diverts the flux of the magnet closest to the coil to flow through the bar until interupted by a pulse of the coil.  The other magnet seeks the closest path back to itself.  The design follows that of an SCR or a logic circuit.  (The magnetic state of the switch stays like a flip-flop.  If any fairly strong magnetic source is present on the attraction bar, it might upset the delicate balance within the magnetic switch.  It might work well for a memory circuit, but probably not for a motor, unless you use only an iron core for a rotor.

[0c]

The device seems to be very similar to a Hildenbrand valve.

Ara Knaian appears to be a real person at MIT

Home Page
http://www.mit.edu/people/ara/

Thesis
http://www.mit.edu/people/ara/thesis08.pdf

Photos
http://img.cba.mit.edu/browse/080613_ara_reversible_permanent_magnet/

Videos
http://img.cba.mit.edu/browse/080613_ara_reversible_permanent_magnet/movies.html

There's an email address at the bottom of his home page if anyone wants to write him.