Editing Determining motor pole count

[[File:Wyedelta.jpg|thumb|3 phase AC/BLDC motor winding schemes. A, B and C represent the phase wires coming out of motor.]]
If magnetic pole count of permanent magnet AC/BLDC motor is unknown, there is an easy way to determine it experimentally.

Needed items:
#3 phase AC/BLDC motors
#Adjustable lab DC power supply 

Procedure:
#Wire DC power supply + and - wires between any of two leads of the motor. I.e. + to A and - to B while C is not connected.
#Use the PSU to drive some DC current to the windings. Don't exceed motor's current rating. A good starting value may be 20-30% of motor continuous current. Now motor should start holding position as the rotor's magnets snap to the driven windings.
#Rotate motor shaft by hand or tool and count the distinct snapping positions per one revolution.
#Motor pole count is twice as much as the number of snapping positions found in the previous step. I.e. if motor snaps 2 times per revolution, it means that motor has 4 magnetic poles.