The application patent number is CN2005 1005 1933.4.
Date of patent application: February 2005.18? .
Brushless DC motor is composed of motor body and driver, which is a typical mechatronics product. Because the brushless DC motor runs in automatic control mode, it will not add additional starting windings on the rotor like the synchronous motor with heavy starting under variable frequency speed regulation, nor will it produce oscillation and out-of-step when the load suddenly changes. At present, most of the permanent magnets of small and medium-sized brushless DC motors use NdFeB materials with high magnetic energy product. Therefore, the volume of rare earth permanent magnet brushless motor is smaller than that of three-phase asynchronous motor with the same capacity by a cardinal number.