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Author Topic: Energy from a permanent magnet! (and an explosive...)  (Read 4627 times)

Offline d3x0r

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Energy from a permanent magnet! (and an explosive...)
« on: November 27, 2013, 07:15:32 PM »
I end up here after searching for ferrofluid generators; which can't work... since there is no order or crystal-structure to the field, any induced field is lost after leaving a magnet.  Although I did find fluids that are permanently magnetic... their gross domains wouldn't yield anything useful... they do end up forming chains/walls... as n-s-n-s etc align... and that structure moving through coils might work... assuming it didn't go sideways; which things always do.

"An explosive-driven ferromagnetic generator (EDFMG, explosively pumped ferromagnetic generator, EPFMG, or FMG) is a compact pulsed power generator, a device used for generation of short high-voltage high-current pulse by releasing energy stored in a permanent magnet. It is suited for delivering high-current pulses (kiloamperes) to low-impedanceloads.The FMGs consist of a permanent magnet (usually a neodymium magnet), a high explosive charge, and a pickup coil.[1] They are a kind of phase transition generators, utilizing pressure-induced magnetic phase transition effect.[2] By adjusting the number of turns of the coil, which can be as low as a single turn, the generator can be designed for delivery of high-current low-voltage pulses or, with more turns, low-current high-voltage pulses.
The shock wave generated by explosion destroys the magnetic domains in the magnet, cause loss of the magnetic field, and the very sudden change induces a high-peak electric currentin the surrounding coil. Both the shock wave directions parallel to the vector of magnetization (longitudal) and perpendicular (transverse) are possible to be used. One of the possible configurations is a ring magnet with the explosive charge in its center.[3]
EDFMGs are especially well suited as seed power sources for explosively pumped flux compression generators and can be used for charging capacitor banks.
A generator coupling an EDFMG containing a 8.75 cm3 of magnetic material with a spiral vector inversion generator yielded a pulse of amplitude over 40 kilovolts with a rise time of 6.2 nanoseconds.[4] Generators delivering pulses over 50 kV and 5 kA were demonstrated.[5]
Ultra-compact generators with diameter less than 50 mm were developed."
« Last Edit: November 27, 2013, 09:35:48 PM by d3x0r »

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