The so-called "Permanent Magnet Brushless Motor", is with the advantages of DC and AC motors, DC motors for the use in the past, even in recent years, the use of AC motors, DC brushless motors have been utilized, the structure is concerned, if There are brush "Permanent Magnet Brushless Motor" of the stator and rotor swap became permanent magnet brushless DC servo motor, but the motor stator coil brushless three-phase windings, so basically its AC motors, DC No Brush followed the usual name of the industry. "Permanent Magnet Brushless Motor" is the traditional rectifier part of a DC motor (brushes and commutator) and retained in electronic form instead of the DC motor can be acceleration, speed and applied voltage is proportional to the torque and the armature current proportional etc., is a very good feature of the motor.