On 7/25/16 6:55 AM, Bob Camp wrote:
HiIf you go back far enough in time …. there is another alternative: Big rectifier bank, turning AC into DC, often off of multiple phases or sources. Big DC motor running into a fairly large flywheel. AC generator (or in some cases DC generators) running off of the shaft A tuning fork (yes state of the art timing) based control on the AC output frequency A saturated reactor control loop on the generator side, same thing on the motor side. Wonderfull stuff. State of the art UPS for your shipboard computer in 1962. Ear muffs anyone? Bob
we had a system like this to turn 60 Hz into 50 Hz with a toothed belt drive between synchronous motor and synchronous generator. It whined.. "Satan's Siren" is what we called it.
IBM mainframes used a similar scheme but I can't remember the details. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
