 My first coil gun... 100V battery or 100V capasitor?
|
|
|
KLH
|
|
Registered Member #1819
Joined: Thu Nov 20 2008, 04:05PM
Location:
Posts: 137
|
To expand upon Barry's remarks, the kind of equation you use depends on your charger topology. Assuming a pure DC source, or something such as a push-pull inverter driving a transformer, you can use this calculator: 
You can enter the charge voltage you expect minus about 5% to give a pratical charge time. The resistance value can be derived from the current that your DC source can supply. This will give the same results as Barry's equations.
The charge time for fixed frequency and duty cycle flyback topologies (those using a boost inductor or flyback transformer) is determined by a completely different set of equations. The charge time is function of the energy stored in the inductor or transformer per cycle and the frequency. You can determine the current in an inductor for a given period in time using this calculator: You need to know your system resistance (including that of your power supply) and the time period during which your inductor is being charged. Then you solve for the energy stored (Energy = 0.5 * Current^2 * Inductance) and multiply by the frequency.
|
|
Back to top
|
|
Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob
|
|
Powered by e107 Forum System
|
