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Registered Member #4659
Joined: Sun Apr 29 2012, 06:14PM
Location:
Posts: 158
I'm doing a Science Fair project on coilguns - I'm trying to find the coil size and shape that gives the highest energy efficiency. Yandersen and Saz have argued about this before, I believe. Anyway, I wanted to use FEMM to simulate a coilgun firing, so that i could (hopefully) get answers on the efficiency of a certain design without having to physically build it.
Does anyone here have FEMM script code that can accurately simulate a single stage coilgun firing? One where I can adjust all the size and shape parameters and find the exit velocity (and thus kinetic energy)?
Registered Member #90
Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
I published a couple FEM models in a theory section here. But I can't vouch for how well they model reality as I had no way to make meaningful direct comparisons.
They should provide a fair starting point and examples for making your own FEM models.
Hope it helps, Barry With great power comes great electricity bill.
I have a real-time simulator written as lua-script for the recuperational gauss I'm going to build. Simulator asks for input parameters: 60 uF for the cap charged to 780 V, 400 mOhm for the extaernal elements resistance should be entered to emulate losses in iron (I don't know how to emulate this precisely). Time discretisation is 30us is good. The second stage is drawn which receives projectile running at 20m/s. If you are interested to emulate first stage, move projectile closer to the center, and replace wire with thinner one. Simulator proved to give pretty close results for my last prototype.
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Does anyone have a FEMM script for simulating coilgun shots?
