As the "big heart" of mechanical movement, the motor appears in our living environment all the time. For example, shopping malls, office buildings, hotels, schools, hospitals and other places cannot do without the auxiliary operation of the motor. With the rapid development of industry, motor matching in all walks of life is particularly important, that is, the motor requires high precision, miniaturization, low speed.

The high precision of motor mainly depends on the mechanical properties of motor, and the high speed motor positioning technology is one of the conditions of many industrial controllers. In recent years, with the vigorous development of electronic manufacturing industry and the development of industrial machinery automation as a future trend, the requirements for motor motors, which are highly related to the mechanical movement, are becoming more and more stringent.