> Modern motor controllers can be quite tolerant of significant voltage
> variation.  However, I doubt they're changing the voltage.

I'm not a power systems engineer, but it could be that changing the supply
voltage would be a matter of changing taps on a transformer.

As for flag day - I remember as a kid when there was a changeover to 60Hz
in the hydro system. (Was it 20Hz before that? Something much lower.)
Anyway, every electric motor in the house had to be changed. Must have
cost a fortune.

P.



--
Peter Hiscocks
Syscomp Electronic Design Limited, Toronto
http://www.syscompdesign.com
USB Oscilloscope and Waveform Generator
647-839-0325

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