Introduction To Brushless DC Motor

Brushless DC motor is composed of motor body and driver, which is a typical electromechanical integration product. Because the brushless DC motor operates in automatic control mode, it will not add additional starting winding on the rotor like the synchronous motor with heavy load starting under variable frequency speed regulation, nor will it generate oscillation and out-of-step when the load suddenly changes. The permanent magnets of small and medium capacity brushless DC motors now mostly use Nd-Fe-B materials with high magnetic energy level. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame number compared with the three-phase asynchronous motor of the same capacity.