Re: Keokuk Dam & 25Hz Power

Not necessarily ... the resulting waveform would be quite fine

> ... imagine a 25 Hz motor on one side turning a shaft connected to a > 60 Hz alternator.

That is how it works. I remember doing some computer work for a company that developed aircraft electronics. In the back room with the ups and such were a couple of motor-generators that produced 400hz power, which is used in large jets. This was routed to the test benches and such.

They have been used as online ups for a long time, usually with a flywheel to store the energy. Very low maintenance devices, that have been around for ages.

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John Hines
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