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Overunity Machines Forum



Cooling effects in Steorn eOrbo

Started by PaulLowrance, December 26, 2009, 11:45:15 AM

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PaulLowrance

#95
January 08, 2010, 03:13:25 PM

Has anyone built equipment capable of re-magnetizing NdFeB magnets?  I'm about to build the following with what I have here. According to FEMM & LTspice, I should get a magnetic field of ~ 36000 Gauss. That assumes my capacitors are in good condition, and have a comparable ESR to similar capacitors sold at digikey.com.

The NdFeB are 2" long, 1" diameter. Also there will be a long steel rod connected to one side of the NdFeB magnet to help increase the field. The coil is 0.5" wide, 0.5", 0.55" ID, deep, 1.05" OD. Coil inductance according to FEMM is 155uH, if square wire is used.  The coil will be shorted to 4 * 1500uF 250 volt capacitors for a total of 6000uF. That should bring the peak current up to 1085 amps for a brief moment. The only problem is the current needs to halted after 3ms, otherwise the current flips due to oscillations due to capacitance & inductance.

Anyway, maybe my caps are junk. They're very old, so we'll see how much current it really peaks to.

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