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Registered Member #3950
Joined: Wed Jun 15 2011, 12:45AM
Location:
Posts: 51
I had an idea how to collect the excess energy past the first half-sine wave in which the projectile is fired. The main capacitor bank will have a controlled pulse time using an IGBT. It will pulse the capacitor bank, releasing as much energy as possible. The projectile will then fire, but a new magnetic field with reversed polarity will quickly build up due to the problems associated with cutting off current to an inductor. An anti-parallel diode will then be used to route the energy not back into the coil to dissipate as heat, but instead into a second capacitor bank. These capacitors should be non-polarized an be able to absorb large amounts of energy quickly. A voltage multiplying circuit can then be used to re-charge the original, "main" capacitor bank. Thoughts?
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Do you mean to use the second capacitor bank as a power source to an inverter that drives a multiplier to charge up your main bank? That could work but you will lose efficiency in the switching circuitry. Still, it is better than nothing!
Registered Member #3950
Joined: Wed Jun 15 2011, 12:45AM
Location:
Posts: 51
Here is my idea.Simulation Hit SW1 to charge the main cap bank, then turn it off. Then hit SW2, and open it just as the main capacitor voltage hits zero. This will cause the back emf to charge the second cap. Hit SW3, and then SW4 to recharge the main cap bank. I left out the voltage multiplier for simplicity's sake. Is there any way that I can use an IGBT or MOSFET to be on for a certain amount of time such as 1-2 milliseconds and then turn off again and not come back on? Obviously in real life you could not close and open SW2 with nearly enough precision for the circuit to work.
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Ideas for independent variables
