Brushless DC motor not only maintains the good speed regulation performance of traditional DC motor, but also has the advantages of no sliding contact and commutation spark, high reliability, long service life and low noise, so it has been widely used in aerospace, CNC machine tools, robots, electric vehicles, computer peripherals and household appliances. The following is a detailed introduction to the advantages of Brushless DC motor:

(1) Brushless DC motor is also called DC frequency conversion because it has the characteristics of DC brushless motor and the driver is also the device of frequency change. The operation efficiency, low-speed torque and speed accuracy of Brushless DC motor are better than those of frequency converter of any control technology. Because brushless DC motor operates in self-control mode, it will not start under heavy load like frequency conversion speed regulation In the same way as the synchronous motor, adding the starting winding on the rotor will not produce oscillation and out of step when the load changes suddenly.

(2) At present, the permanent magnet of Brushless DC motor mostly uses rare earth NdFeB material with high magnetic energy product. Therefore, the volume of rare earth permanent magnet brushless motor is one frame number smaller than that of three-phase asynchronous motor with the same capacity.

(3) Brushless DC motor has high efficiency, high efficiency area, high power and torque density, power factor (COS Φ) is close to 1, and system efficiency is less than 90%. In any case, the rotor of permanent magnet brushless DC motor runs synchronously, AC variable frequency motor drives by variable frequency, DC brushless motor drives by variable frequency, and the rotor of motor runs at synchronous speed without copper or iron loss

(4) Brushless DC motor has the advantages of low voltage, high torque overload, high starting torque and low starting current.

(5) Wide speed range, the motor can run in low, medium and high speed range.

(6) It has strong overload capacity and can meet the needs of protruding stall of vehicles. The regenerative braking effect is good. When the car is going downhill or braking, the motor can completely enter the generator state to charge the battery. At the same time, it plays the role of electric braking and reduces the burden of mechanical braking. The motor has the advantages of small volume, light weight and high specific power, which can effectively reduce the weight and save space.

(7) The motor has no mechanical commutator and adopts a fully enclosed structure to prevent dust from entering into the motor with high reliability.

(8) Motor control system is simpler than asynchronous motor.