Brushless dc motor is different from common motor's biggest brushless dc function well control motor rotation Angle; Brushless dc motor is a kind of electrical pulses into angular displacement of the actuator. Popular point: when brushless dc drive receives a pulse signal, it is set according to the direction of the brushless dc motor driven rotating a fixed Angle (The step torque Angle)。 Can be controlled by controlling the pulse number of angular displacement, so as to achieve the purpose of accurate positioning; At the same time you can control the pulse frequency to control motor rotation speed and acceleration, so as to achieve the purpose of regulating.