(1) loss of small, high efficiency.
Because the permanent magnet excitation, eliminate the loss of induction motor excitation current;At the same time, permanent magnet brushless dc motor work in synchronous operation mode, eliminates the loss of switch frequency of induction motor rotor core .These two aspects makes the running efficiency of the permanent magnet brushless dc motor is far higher than that of induction motor, small capacity motor efficiency is more obvious.
(2) high power factor.
As a result of the brushless dc motor excitation magnetic field does not need power grid reactive current, so the power factor is far higher than that of induction motor, brushless dc motor can be run on 1 power factor, it is highly advantageous to small power motor.Brushless motor not only has higher efficiency and power factor when compared with induction motor,but also has more advantages in light load.
(3) the speed performance is good, simple control.
Compared with the variable frequency speed control of induction motor, brushless dc motor speed regulation control is not only simple, but also has better performance of speed adjustment.
