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.
- posted
15 years ago