The DC brushless motor used in AGV is mainly used to transport goods between two points, and its function is relatively simple. With the progress of science and technology, the development of AGV industry and the improvement of customer demand, the requirements for the functionality and customization of AGV cars are getting higher and higher, and the AGV motors are constantly updated. From DC brushless motors to DC brushless servo motors, every change is based on the continuous improvement of grass-roots technology.In AGV robot industry, especially logistics storage AGV cars, DC brushless and servo motors have occupied most of the market. DC brushless motor and DC brushless servo motor have been adopted by most AGV enterprises because of their characteristics of maintenance-free, high efficiency, low operating temperature, small electromagnetic radiation and long life. Such as QDTG(H)62-24 DC brushless motor and QDTG62-24 DC brushless servo motor provided by Shanghai Chidong Company.DC motor refers to the use of DC power supply, and its difficulty lies in the motor starting (because the magnetic field generated by DC is constant), which requires brushes or circuits instead of brushes. The DC brushless motor is controlled by Hall feedback, mainly by speed control. For AGV cars with low precision and functional requirements, the control is relatively simple. Generally, a brushless motor judges the rotating position of the rotor according to six groups of codes generated by three Halls, such as 001 and 101, and then controls the current commutation of the winding, which is mainly used as a power output, and it is not necessary to control the rotating angle very accurately. At this time, it is enough to use Hall elements, such as the motor used in the ordinary handling car between two points, that is, the earliest AGV car. Brushless motor has no brush, so it has no relevant interface, so it is cleaner, less noisy, in fact, no maintenance and longer service life. Because the DC motor itself has the advantages of simple control system, convenient speed regulation, and no inverter device, and AGV does not need to work on high speed and high power, most enterprises still use DC motor as the power source of the drive system.