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Old 05-20-2009, 04:35 PM   #2 (permalink)
Bicycle Bob
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The only limit I know of is the insulation for higher voltages. To raise voltage, DC is first chopped up and switched to AC, and then run through a transformer. For a 1:50 step-up, you just need 50 turns of thin wire on one side, for every turn of thick wire on the other. For 3-phase, you'd use 3 choppers and 3 transformers.
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