Wear brushless motor is mainly on the bearing, nidec motor from a mechanical point of view, a brushless motor is almost maintenance-free electric motor, and when necessary, just do some maintenance to dust. On the next comparison, we know brushless motor with respect to the brush motor strengths lie, but everything is not absolute, there is an excellent low-speed torque performance brush motor, torque brushless motor performance characteristics are irreplaceable, but brushless motor on ease of use perspective, with the decline in the cost of brushless controller development and market trends, and domestic and international competition brushless technology, brushless power system is the rapid development and popularization stage weight, servo it is also very promote the development of large-model sport.
　　Brushless DC motor is a synchronous motor, that the motor speed of the rotor by the motor stator and the rotor speed of the rotating magnetic field of the number of poles (P) Effect: N = 120. f / P. In the case of a fixed number of rotor poles, changing the frequency of the stator rotating magnetic field can change the speed of the rotor.
　　Brushless DC motor that is coupled to a synchronous motor electronic control (drive), the frequency of the rotating magnetic field to control the stator and the rotor speed of the motor feedback to the control center repeatedly corrected to achieve near DC motor characteristic ways. That brushless DC motor can remain within the rated load range can be controlled when the load changes the motor rotor to maintain a certain speed.