I am building a piece of equipment for the aircraft industry that uses
a 115V 400Hz electrical supply. I have found I need to fit a cooling
fan (like a PC one but a bit wider - about 5 inches diameter) and have
got a 120V 50/60Hz one.
Will this work? Impedance wise a higher frequency would mean less
current drawn by what is presumably a mainly inductive load, but my
main query is are fan rotation speeds related to the AC supply
frequency? If so I guess trying to run a fan at about 7 times it's
rated speed would not be a good idea so I haven't yet tried it.