i'm driving BLDC using sensorless method. The driving algorithm is woking fine, but on the bemf oscilogram i can see, that the power-on stage length is little bit different for each of the 3 phases. I'm just curious why. I think that it could be caused by the motor assymetry or imperfect magnets positioning, but i'm not sure. Could it be caused also by something else? Lets assume the motor is perfectly symetrical. Will i see this effect too? Why? Thank you for any ideas.