Coilgun

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Contents

What is this?

Documentation, notes, resources, etc. about Phil's project to try and build a coilgun (aka a Gauss gun).

Background Info / Resources

Wikipedia entry on coilguns

Barry's Coilgun Page

Barry's Bibliography

World's Coilgun Arsenal

Coilgun Technology @ UTexas (pdf)

Coilgun Forum

Other useful discussion forums / boards

Other 4HV Forums

EDABoard Forums

Make Magazine Forums

All About Circuits forum

PhysicsForums.com


Coilgun Videos on Youtube

http://www.youtube.com/watch?v=7LjnhhtHojM

http://www.youtube.com/watch?v=GjMTffRav-I

http://www.youtube.com/watch?v=6mobpTrl7cA

Reference Material

http://info.ee.surrey.ac.uk/Workshop/advice/coils/terms.html

http://www.facstaff.bucknell.edu/mastascu/elessonshtml/LC/Induct1A.htm

http://teacher.pas.rochester.edu/phy122/Lecture_Notes/Chapter32/chapter32.html

Barry's Inductor Simulator

Inductor Mathematics

AWG (American Wire Gauge) Chart

http://home.earthlink.net/~jimlux/hv/wheeler.htm

http://electronbunker.sasktelwebsite.net/CalcMethods3b.html

http://www.moshier.net/coildoc.html

University of Texas - Center for Electromechanics

http://en.wikipedia.org/wiki/Electromagnet

http://en.wikipedia.org/wiki/Ampere's_Law

http://en.wikipedia.org/wiki/Electromagnetism

EEVBlog Forum

MadModder

PowerSupplyCircuit.net


Insulated Gate Bipolar Transistor

MOSFET

Silicon Controlled Rectifier

Thyristor


http://ocw.mit.edu/courses/physics/8-02sc-physics-ii-electricity-and-magnetism-fall-2010/

http://www.amazon.com/Inductance-Calculations-Dover-Phoenix-Editions/dp/0486495779/ref=sr_1_1?s=books&ie=UTF8&qid=1315496581&sr=1-1

http://www.amazon.com/Inductance-Calculations-Dover-Books-Engineering/dp/0486474402/ref=pd_sim_b_1

http://www.amazon.com/Inductance-Partial-Clayton-R-Paul/dp/0470461888/ref=pd_sim_b_2

http://www.amazon.com/Students-Guide-Maxwells-Equations/dp/0521701473/ref=pd_bxgy_b_text_c

http://books.google.com/books?id=VLm_dqhZUOYC&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=zFeWdS2luE4C&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=HWrMET9_VpUC&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=zFeWdS2luE4C&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=b2f8rCngSuAC&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=31hjdifsTeQC&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=x5JHdOPHwcQC&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=Zfk2E5pkwy0C&dq=isbn%3D0763738271&source=gbs_similarbooks

http://books.google.com/books?id=2CbvXE4o5swC&dq=isbn%3D0763738271&source=gbs_similarbooks

Software

FEMM

Magpar

GNU Octave

Scilab

Maxima

GNU Scientific Library

Sage

GNUPlot

NumPY

Jakarta Commons - Math

Sources for parts / materials / tools/ etc

Bulk magnet wire

Magnet wire

Clear PVC Pipe

Clear PVC (again)

Surplus Sales of Nebraska

Information Unlimited

Skycraft Parts & Surplus

All Electronics

Allied Electronics

Jameco

Newark

Digikey

Mouser Electronics

JPM Supply

Big list of suppliers from mini-lathe.com

Northern Tool & Equipment

The Electro Store

Electronic Surplus

Surplus Traders

McMaster-Carr

Lowes

Radio Shack

KJ Magnetics

Zoro Tools

Grainger Industrial Supply

Wholesale Electronics, Inc.

Valuetronics

Emco High Voltage

Electronic Goldmine

HSC Electronic Supply

Notes / Pictures / Documentation

09-09-2011

A batch of photos of a very (very!) primitive prototype of the physical layout. What this is driving towards is a version where the electromagnets are outside of the "barrel" and not directly in line with the projectile. The reason for doing this is so we can use a ferrous core for the magnet, which greatly, greatly increases the field strength (all other things: # of turns, wire gauge, current, etc., being equal). The hope is that the greater field strength will more than compensate for not having the field directly aligned with the barrel.

Photo Gallery on G+


2011-09-08 cg1.jpg


09-11-2011

Got one electromagnet wound, playing around to see if it would move a small ball bearing without using a ton of current. Turns out, at 25-30 volts, you only get 1 amp of current through this thing (resistance), but that's enough to grab the ball bearing from about an inch away and get it moving. It'll be interesting to see how it works with the two magnets, one on each side.

What I'm quickly realizing about this, is that the power switching and the timing of the magnet pulses, is going to be crucial, especially if I go with a multi-stage gun. Relays are big, clunky, and possibly too slow, so I ordered a batch of high power SCRs (Silicon Controlled Rectifier) from Newark last night. From what I've seen, SCRs are how most people are doing the switching on these things. We'll see...

Another batch of pictures of the progress:

https://plus.google.com/photos/114301088526097505896/albums/5650980399687868385