High power brushless motor consists of an electric motor body and drive and is a typical mechatronic product. The stator winding of the motor is made into three relatively astrocyte, which is very similar to the three-phase asynchronous motor. The rotor of the motor is glued to a magnetal permanent magnet, and in order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits, and its functions are: to accept the start, stop and brake signal of the motor to control the start, stop and brake of the motor. It used to control and adjust the speed.
High power brushless motor is closely linked to the development of electronics, microelectronics, digital technology, self-control technology, and materials science. It is not limited to the AC-DC field, but also involves the power conversion of electric power generation and signal sensing. In the field of motor, the variety of new brushless motors is more, but the high performance of brushless motors due to price constraints, its application is not very extensive.