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want to experiment with charging a large capacitor using the Earth as the power supply
Circuits have two ends. Could you sketch your earth-balloon circuit showing the flow paths and indicate the EMF source.
In the post above you can see electrostatic motors that have been run using the weather field of the Earth as the power source.
Simply you would ground one plate of the capacitor to Earth and the other plate you would attach to a balloon on a wire or a tower. The plate that is grounded would be negatively charged whilst the other plate would be positively charged.
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
But how does the current get back from the earth, to the balloon, to balance the circuit, i.e. to account for the energy loss in the rotor of the electrostatic motor?
If you want to charge a leyden jar all you do is earth one side to ground and touch the terminal of a static machine to the other. There is a potential difference between the Ionosphere and Earth which will cause electrons to flow from ground to the positively charged balloon. For current to flow you only need a potential difference.
Registered Member #5752
Joined: Sun Jul 15 2012, 07:20PM
Location: USA
Posts: 1
Considering that the wattage that can be pulled from the atmosphere is so low due to the miniscule current, teeny tiny non-ideals suddenly become a huge problem. Leakage due to humidity and pollutants in the air and the reactance of parasitic capacitances and inductances are but two examples off the top of my head. Even the expansion and contraction of materials with changes in temperature could make it extremely hard to keep everything adequately in tune, no?
I'm not saying it can't be done or we wouldn't have crystal radios, but it seems to me that extracting a meaningful amount of power is quite a task to tackle.
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How to calculate resonant frequency of capacitor?
