The brushless DC motor is composed of a motor body and a driver, which is a typical mechatronics product. Brushless motor refers to a motor without brushes and commutator (or collector ring), also known as a commutator-free motor. As early as the nineteenth century, when the motor was born, the practical motor produced was the brushless form, that is, the AC squirrel cage asynchronous motor, which was widely used. However, asynchronous motors have many insurmountable drawbacks to the slow development of electrification technology. In the middle of the last century, transistors were born, so brushless DC motors that used transistor commutation circuits instead of brushes and commutators came into being. This new brushless motor is called an electronically commutated DC motor, which overcomes the shortcomings of the first generation of brushless motors.
