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Registered Member #2652
Joined: Mon Jan 25 2010, 11:36PM
Location: Hamilton Ontario
Posts: 7
I know the basics about the rail gun. I know that it requires a high voltage pulse to create the strong magnetic fields between the rails. Instead of a few (or more) high voltage capacitors would it not also work to use a marx generator? Sorry if this is a stupid question but I have been looking at the whole subject of electricity for some time and I just don't understand it.
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Magnetic field strength is porportional to the current, not voltage. The reason that a high(er) voltage is used is so it can over come resistance (ohms law), and more current will be drawn. A marx generator creates excessive voltage, but can not supply the current to take advantage of that (Unless you have a huge marx gen).
Registered Member #2652
Joined: Mon Jan 25 2010, 11:36PM
Location: Hamilton Ontario
Posts: 7
Okay, that makes sense. But would a large marx generator work? I know that they give off a slight emp so wouldn't a generator to the size needed actually fry all electronics in the area? And how would building an even larger marx generator increase the current. Wouldn't that just increase the voltage even more than it already is? Forgive me but I really can't put the difference between joules current and voltage in perspective either. NO matter how i look at it, it just won't stick.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
I think when he say bigger marx gen he means one with insanely large capacitors. The bigger the capacitor, the more current you will be able to draw. The reason this is hard is because caps that big at high voltages are easily a few hundred each even when found used and surplus.
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040
Azaroth wrote ...
Okay, that makes sense. But would a large marx generator work? I know that they give off a slight emp so wouldn't a generator to the size needed actually fry all electronics in the area? And how would building an even larger marx generator increase the current. Wouldn't that just increase the voltage even more than it already is? Forgive me but I really can't put the difference between joules current and voltage in perspective either. NO matter how i look at it, it just won't stick.
Thanks Azaorth
here is a good analogy I have NEVER had fail with anyone I have met that can put everything in perspective:
the voltage is like the pressure in a pipe, it is only the pressure of what is in the pipe, it has nothing to do with the material flowing through the pipe. The current is the fluid flowing through the pipe. A high voltage at a low current can be compared to having compressed air hit you. the same voltage at the same current it can be compared to the pipe having the same pressure, but instead of air it is water, which hurts a lot more. The voltage is the pressure that moves the current through the circuit. the resistance is like pushing that fluid uphill, you need more pressure (voltage) to do it.
Joules are the measurement unit for Energy: it can be compared to the work done by anything or potential work that could be done. For example, in the water pipe say it has a certain number of joules. That water strikes an object that is pushed by the water, moving a distance. Increasing the energy gives the pipe the ability to do more work (either move the same distance faster, move farther at the same speed, or a balance between the two).
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Railgun with marx generator?
