If I hook up a big gear to a much smaller one to spin it incredibly fast could that be used to generate power? And if so could that idea be used to generate power on a much bigger scale? In my brain it makes perfect sense but there must be something wrong with this idea.
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A generator experiences resistance based on the load it’s carrying/supporting; think of pushing two magnets together, with the same poles pointing at each other. Spinning a magnet at high speed, low torque means that it can move fast, but will not be able to support higher loads. There’s no free lunch; gearing can convert speed to torque or vice versa but not generate free power.
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