/diy/ - Do It Yourself

image for the next OP?

>>1710628
Depends on the type of motor, if it's an induction motor the maximum speed is indeed controlled by the AC mains frequency (rotation frequency ≤ mains frequency). But little to no mains AC motors I know of use synchronous motors (rotation frequency = mains frequency) for the very reason that at startup the motor isn't moving at all and somehow has to speed up just from a "rotating" magnetic field. In an induction motor, the magnetic field precesses around the squirrelcage motor at a rate equal to the difference between the mains frequency and rotation frequency, so at startup this precession rate will be equal to the startup rate, and at maximum speed it will barely be moving at all. The faster the precession, the more torque on the motor, give or take. So a higher frequency will likely make the motor spin faster, but to a severely limited extent. A brushless DC motor is effectively an AC synchronous motor because the magnetic field in the rotor cannot precess, I know of no other types of synchronous motor.
If you instead have a brushed universal motor, AC frequency means nothing as the waveform is being effectively rectified into DC as far as the forces are concerned. So in the event that your vacuum cleaner has a brushed universal motor (quite likely) it will not care about frequency at all. Brushed universal motors are about the most asynchronous type of motors you can imagine.
cont.