199 servo system is based on the development of frequency conversion technology products, it is usually composed of servo motor and servo driver. In addition to the speed and torque control, servo system can carry out accurate, fast and stable position control. The application of digital AC servo system is more and more widely, and the requirement of servo drive technology is more and more high.
In general, the development trend of servo motor servo system can be summarized as the following four aspects:
First, integration
More and more output devices of the servo control system adopts the new power semiconductor device switching frequency is high, the device will enter the isolation, braking and overtemperature, overvoltage, overcurrent protection and fault diagnosis function are integrated in a small module. With a control unit, as long as the software system parameters are set, they can change their properties, sensor can use the motor itself to form a closed loop control system configuration, and can be connected with external sensors such as position, speed, torque sensor, a high precision closed loop control system. High integration significantly reduces the volume of the entire control system.
Two, intelligent
Most of the internal control of the servo system adopts a new type of high speed microprocessor and a special digital signal processor (DSP), so as to realize the full digital servo system. The digitalization of servo system is the precondition to realize it. Intelligent servo system in the following aspects: all the operating parameters of the system can be through interactive way to set up the software; secondly, they all have the fault self diagnosis and analysis functions; and parameter self-tuning function etc.. As we all know, the parameter setting of the closed-loop control system is an important part to ensure the performance of the system. The servo unit with auto tuning function can automatically adjust the parameters of the system through several test runs, and realize the optimization automatically.
Three, networking
Network servo system is an inevitable trend of the development of integrated automation technology, control technology, computer technology and communication technology, fieldbus is a kind of application in the production field, in the field of equipment, between field devices and a control device between the two-way string form, multi node digital communication technology. Fieldbus has been widely used in servo system, servo system and other peripheral devices, such as the man-machine interface HMI, programmable logic controller (PLC) and so on. There are several types of FF: ProfiBus, WorldFIP, ControlNet/DeviveNet, CAN, etc.. All of these protocols provide the possibility of multi axis synchronous control, and are also integrated by some high-end servo drivers, which make the servo system have the advantages of distributed, open, interconnected and high reliability.
Four, simplified
According to the user will use the user control function to be strengthened, so fine, but some features will not be used to be streamlined, thereby reducing the cost of the servo system, create more benefits for customers, and by reducing the number of components, reduce the waste of resources and environmental protection. Here said the "easy" refers to the servo system software programming and operation is from the user point of view of the development of the design, and strive to be simple and easy to use, so that users simply need to debug.
China's servo system servo motor market is still dominated by foreign enterprises. And a number of domestic enterprises in the fierce competition in the market gradually grow up. Therefore, many domestic manufacturers have foresight to increase research and development efforts to enhance the performance of their products, and then expand its brand appeal, domestic manufacturers to change the monopoly of imported servo will point the day and await for it. The next five years, the industry in China to benefit from the effects of servo system of industrial upgrading, will still maintain a growth rate of over 20%, to 2015, China's servo system industry market size is expected to exceed 10 billion yuan, domestic servo product market share will reach 40%.
