Summary of Control Strategy for High Performance AC Servo Motor System
With the rapid development of power electronics technology, motor manufacturing technology, large-scale integrated circuits and microprocessor control technology, people have higher and higher requirements for the performance, function and cost performance of AC servo control products. The organization's AC servo control system has been widely used in CNC machine tools, robots, office automation equipment, large-scale integrated circuit manufacturing, radar and flexible manufacturing systems.
As one of the important driving sources of modern industrial production equipment, AC servo system is the core technology involved in the modernization of modern industrial technology. Developed countries such as Japan, the United States, Germany, the United Kingdom, and France hold the vast majority of core technologies in this field, and implement technical blockades on China. Among them, the key technology that determines the performance of the servo system is servo drive control technology, which is a foreign servo technology. The main part of the blockade. With the maturity of domestic AC servo motor and driver hardware technology, the servo drive technology in soft form in the control chip has become the bottleneck restricting the development of high-performance AC servo technology and products in China.
Therefore, the research and development of digital AC servo drive control technology is based on the AC servo system and motion control technology of independent intellectual property rights, and it forms an industry, which provides favorable technical support for the development of China's equipment manufacturing industry. It has great practical significance and broadness. The prospect of social application.
Development status of servo drive technology
The history of high-performance servo systems and servo drive technology is closely related to servo motors. In the past 60 years of development history, it has experienced three major stages of development:
Before the 1960s, this stage was mainly driven by power stepper motors, mostly position open loop control systems. The system has the advantages of short response time, small size of the drive components, etc. It is widely used in EDM machines, dot matrix printers, automated production lines, etc., but at the same time, it has the disadvantages of large heat, low efficiency, easy pollution, and difficult maintenance. .
In the 1960s and 1980s, DC servo motors were more mature than AC servo motors, and the speed control performance was good. The related theory and technology are relatively mature. Therefore, DC servo systems have been widely used in industry and related fields. The position control of the system has also evolved from an open loop system to a closed loop system.
After entering the 1990s, with the rapid development of microelectronics technology, the integration of circuits is getting higher and higher. The development of related technologies such as sensor technology, rare earth permanent magnet materials and motor control theory makes AC servo control technology Great development. A variety of new motors such as brushless DC servo motors (bldc) and AC servo motors (pmsm) have emerged. And gradually replaced the DC servo system has been widely used in many high-tech fields. The control mode of the AC servo system is rapidly developing to the digital control direction, and the hardware servo is turned to the software servo. The intelligent software servo will become a development trend of servo control.
