Random vector position of stator current ( Id + Iq = Is ):
Now I draw the stator current/flux vector as shown below where “Iq = 0” and “Id ≠ 0”:
From lecture I’ve learned that the south pole of the rotor (permanent magnet) lies on the d-axis. In this case it would look like below:
I’ve also learned from lecture that the direction of the stator current depends on the stator coils which are currently energized.
So if I add all those things together, I would expect a picture like below:
in this case, the two outer magnets would repel the rotor magnet so that the rotor magnet would rotate by 180°, wouldn't they?
So the torque would not be zero.
Where is my mistake?
I’m a mechanical engineer.