Brushless DC motor is composed of the motor body and driver, and it is a typical mechatronics integrated product. Due to the fact that brushless DC motors operate in a self controlled manner, they do not add additional starting windings to the rotor like synchronous motors that start with heavy loads under variable frequency speed regulation. Brushless DC motors also do not experience oscillations and out of step during sudden load changes.

The stator windings of brushless DC motors are mostly made into three-phase symmetrical star connection, which is very similar to three-phase asynchronous brushless DC motors. The rotor of a brushless DC motor is adhered with a magnetized permanent magnet. In order to detect the polarity of the rotor of the brushless DC motor, a position sensor is installed inside the motor.

BLDC means brushless DC. BLDC brushless motor is a form of motor, although called BLDC brushless motor, BLDC brushless motor is actually an AC motor. The stator winding of BLDC brushless motor is mostly made into a three-phase symmetrical star connection method, and BLDC brushless motor is very similar to three-phase asynchronous motor.