1 Some equipment require a 3 phase supply ie motors
I never knew there where 3 phase motors on Aircraft - I'm not being cute - have there been 3 phase AC motors aboard aircraft and what are they used for ?
Freq= RPM x pairs of Poles
don't forget the /60 to allow for RPM ref minutes and HZ (or CPS) ref seconds.
FREQ = RPM x Pole Pairs / 60
It would be almost DC if it was 1 or 2Hz.... or is my aged brain playing tricks with my radio theory?
Now you'd be in the ballpark's home city :P if we're talking servo drive theory -from a standpoint of a PCM driven device (or motor) a higher freq = higher drive =kind of= more DC drive. but AC at any freq, because of pos & neg voltage excursions is not DC.