Theory
Section
descriptions:
Coilgun
Basics 1, 2, 3 
Brief
introduction to coilguns and instructions on how to build a simple tabletop coilgun.
Electromagnetic
Basics 1, 2, 3, 4 
Describes the basics
of electromagnetic forces and shows how these operate in general.
Coilgun
Fundamentals 1, 2 
This section looks
at the principles involved in the operation of a coilgun.
Coil
Resistance 
If you don't have
a high resolution ohmmeter then this formula will give you a good approximation
to the coil resistance.
Optimised
Coil Parameters 1, 2, 3 
Find out how the
circuit resistance and coil parameters affect the current density and field strength
in the coil.
Coil
Power Handling 
Make sure that
you don't melt your coils. Find out how to estimate the temperature rise.
Inductance
Measuring 
A transient technique
is described which can be used to determine the inductance of a
coil.
Inductance
Calculation 
FEMM can be
used to determine the approximate inductance of a coil operating
at low frequencies.
Switching
Devices 
This describes
the most common semiconductor devices which can be used in a coilgun system.
Triggering
Circuits 
The main types
of triggering are discussed and some example circuits are given.
Measuring
Speed 
How fast does your
coilgun fire that projectile? This explains two methods which can be used to tell
you just that.
Projectile
Design 
If you want your
projectiles to go ballistic then think about some of these design issues.
Metallic
Tubes 
Metal accelerator
tubes mean one thing, eddy currents. This section shows how to reduce eddy current
paths in a metallic tube.
Coil
Construction Issues 
High power coilguns
experience large dynamic forces so the coils need to be constructed with inherent
strength. Some simple ways to achieve a strong coil are discussed.
Energy
Sources 
Suggestions about
what can be used to power a coilgun.
Mathematics

Covers some of
the math used in electromagnetics.
Finite
Element Software 
A brief look at
two free finite element numerical field solution packages, Quickfield and FEMM.
