Brushless DC motors are synchronous motors, meaning that motor stator rotating magnetic field of the rotor speed, speed and rotor poles (p) impact:
n=120. f / p¡£ Rotor pole fixing cases, change the frequency of the stator rotating magnetic field can change the rotational speed of the rotor. Brushless DC motors are synchronous motors with electronic control (drive), the control frequency of the stator rotating magnetic field and rotor speed feedback to the control centre over correction, to achieve close to DC motor characteristics. DC Brushless motor that is within the rated load when the load changes can still control the rotor when you maintain a certain speed.
Brushless DC drive, including power and Control Division, Department of power, with three-phase power to the motor, control Department, according to convert input power frequency.
