Miért lenne gond?

3000-et fordul 50 Hz-en, 3600-at 60-Hz-en.

http://en.wikipedia.org/wiki/AC_motor

"Single-phase AC synchronous motors:

....The rotors in these motors do not require any induced current so they do not slip backward against the mains frequency. Instead, they rotate SYNCHRONOUSLY with the mains frequency...."


"Three-phase AC synchronous motors

If connections to the rotor coils of a three-phase motor are taken out on slip-rings and fed a separate field current to create a continuous magnetic field (or if the rotor consists of a permanent magnet), the result is called a synchronous motor because the rotor will rotate in SYNCHRONISM with the rotating magnetic field produced by the polyphase electrical supply."