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Author Topic: Magnetic energy Harvesting Using Magnetostriction  (Read 3621 times)

Offline markdansie

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Magnetic energy Harvesting Using Magnetostriction
« on: July 28, 2013, 06:32:04 AM »

Hopefully this might fire up the creative juices in those of you interested in the potential of magnets

Kind Regards

Offline ZeroFossilFuel

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Re: Magnetic energy Harvesting Using Magnetostriction
« Reply #1 on: May 15, 2022, 03:32:47 PM »
I'll post here a portion of what I just sent to Stefan privately.

I am still advancing my idea surrounding NJM (Non-Joulian Magnetostriction), or more commonly called "Swelling Magnets".  It requires a specially treated alloy of iron and gallium formed as a single crystal.  Most all ferrous materials exhibit a small amount of Joulian Magnetostriction which is a linear function.  This new alloy exhibits NJM, a very non-linear reaction, which changes the physical size so dramatically that one of it's possible applications is in mechanical actuators.  I liken it to a solid counterpart of the liquid/gas phase change that occurs in freon in air conditioners, which undeniably produces up to 4x COP, but are almost impossible to loop because of the number of energy conversions necessary to get back to electrical energy to run the compressor.

This solid alloy, when exposed to magnetic fields, literally changes it's shape and molecular orientation.  My original concept was to test it as a mechanical actuator for a rotary device.  Then it hit me.  It could also easily be applied to MEG devices.  It would also explain why so many experimenters who tinkered with MEGs and thought they had something had so much difficulty repeating their results.  It's because they did not fully understand the necessity of fine tuning the biasing magnetic field around the core material.  And even if they did, using conventional ferrous materials in the core produced so little return it wasn't worth it.  The hysteresis of regular core materials produces to much heat and efficiency losses.  This new alloy exhibits no measurable hysteresis or heat loss.  Not only do I think this alloy might be the key, but it could easily be scaled up and tuned to oscillate at 50 or 60 Hz alternating current!  I'm talking Tony Stark "ARC" reactors in everything from cell phones to electric cars, even factories.

If I had the money I would just buy a sample from Ames Laboratories and start testing immediately.  The apparatus I started building to replicate the process pioneered by Ames on a bench-top scale for making the crystalline alloy is presently half assembled and stalled for time and resources.  I will be getting back to it, hopefully before the end of the year.


Offline Paul-R

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Re: Magnetic energy Harvesting Using Magnetostriction
« Reply #2 on: May 15, 2022, 05:04:28 PM »

There are several threads on terfenol D and Don Smith's implementation. It might be better to join one of them.