# Whats is the angle precision of a 3 phases bldc motor?

I have a small BLDC motor and I would like to use it in a project of mine.

Is there any relation between the minimum angle (precision) I can move the motor and its number of poles?

How could I calculate the minimum step I can move the motor, considering that it has 12 poles?

• A BLDC motor in angle operation behaves rather a lot like a stepper motor. The controller will determine your interpolated angle precision. Typical microstepping is 16 to 256 of a full step (up to 200 full steps per rotation equivalent to 50 poles on a 4 phase motor) for stepper motors, standard microstepping products for BLDC motors are a bit less common or DIY so the answer is that it depends. The camera gimbal people have solved this problem a few times, check them out. Nov 19, 2016 at 22:27
• It looks like twelve poles. Has to be a multiple of three, doesn't it? Or does the rotor have fourteen teeth? Nov 20, 2016 at 8:19
• I edited the question. The motor has 14 permanent magnets on the outer part (rotor) and 12 electro-magnets on the stator, connected to the 3 phases. Nov 20, 2016 at 9:50