With the rapid expansion of industrial robots, electronic manufacturing equipment and other industries in recent years, the application scale of servo systems in emerging industries will also accelerate. When everyone is talking about the lack of core technology of domestic robots and the need to strengthen the four core components,  the reducer are mentioned a lot, however only few conversation involves the servo motor in the servo system.

　　 The current status of domestic servo motors is that the small is not small, and the big is not big. How to understand this? Small-power servo motors are not suitable for miniaturization such as 200W and 400W servo motors commonly used in light-duty robots. At present. Panasonic's A6 and Yaskawa's Σ7 motors are short and delicate

　　In contrast, domestic servos are generally long and have a rough appearance, which is not possible in some high-end applications, especially on desktop robots with a light load of about 6kg since the installation space of the robot arm is very small, which has a strict limit to the length of servo motor.

　　Second, the reliability of signal connectors has been criticized. Domestic servos need to be improved, and the miniaturization and high density of connectors are also a necessary trend. And the integration design with the servo motor body is a good way. At present, many Japanese servo motors are designed in such a way that they are easy to install, debug and replace.

　　Another core technology of servo motors is high-precision encoders, especially multi-turn absolute encoders used in robots, which rely heavily on imports with failure to achieve localization, which is a major bottleneck restricting the development of high-end servo systems in China. The miniaturization of the encoder is also the core technology for the miniaturization of servo motors. We can easily find that the replacement of Japanese servo motor products are accompanied by the coordinated development of motor magnetic circuit and encoder!

　　At present, the servo motor that domestic OEMs produce are mostly based on the market share, which is why they look like that of Japan. There are a lot of small-to- medium servo motors within 3Kw output power, and none between 5Kw-15Kw in the market, resulting in the application of some devices have to give up the whole system because there is no high-power servo motor and driver. 

　　To sum up, the development model of Japanese servo system is layered and coordinated development, and its overall performance is excellent, which is very similar to the development of robots in Japan. In China, the company only manufactures what they sell without integration. For example, you will find motor manufacturing company only produces motor with nothing attached, which is similar to the running model of encoder manufacturing company, driver manufacturing company, which leads to lower overall performance of the servo motor and the drive system, compared with thoes of Japan. 

　　Secondly, there are less basic research on the servo system, including absolute encoder technology, industrial manufacturing technology of high-end motors, breakthroughs in production processes, practical verification of performance indicators and formulation of assessment standards. These need to be perfected by the core component companies in the robotics industry.