mne1018:
Also, how do you know the number of poles the motor has? I tried to look it up online, but have not been able to find a good answer. Thank you!
Two ways - take it apart and measure the number of magnetic field reversals round the rotor. That's
the pole count.
Without disassembly: Put a few amps between two of the wires of the motor, count the number of detent positions you get
turning the shaft, that's the number of electrical cycles per revolution, which is half the pole count.