After experiencing the transition from simulation to digitization, the modern alternative current servo system possess digitization control anywhere, like control of phase conversion, current, speed and position. Adapt semiconductor element with new power, DSP & FPGA with high performance and professional module of servo. The servo system products of the national manufacturer will be innovate every five years, the new power element and module will be innovate every 2 or 2.5 years and the calculation of the new software become variable. Totally, the life time of the products become shorter and shorter. Combine summarize the technology routine and product routine of the servo system manufacturer both in domestic and oversea with the change of the market requirement, reaching some of the development tendency of the servo industry.

       1.High efficiency

       Although this aspect work had operate in the early, still need strength to continue, mainly including the high efficiency of the servo motor, like improvement performance of the permanent magnet material and structure design of the magnet steel installation. Besides, the high efficiency of the servo driver, like optimization of the invert driver circuit and movement of increase and decrease, regenerative braking and energy feedback and better way of cooling, etc.

       2.Direct driver

       The direct driver include adapt the turntable servo driver disc motor and linear servo driver control of linear servo motor. Due to the elimination of the intermediate transmission error, so as to realize the high speed and high positioning accuracy. The characteristics of the linear motor easy chang shape can adapt various devices of the linear straight line mechanism to realize miniaturization and light weight.

       3.High speed, high precision, high performance

       Adapt much higher precision of the encoder(per turn millions of pulse level), higher sampling precision and speed of data bits, faster speed of DSP, non cogging effect of high performance rotary motor, linear motor and application adaptive, artificial intelligence and other modern control strategy, continuously improve indexes of servo system.

       4.Integration

       Motor, feedback, control, driver, communication of vertical integration become one of the development directions of the low power servo system. Sometimes we call this motor integration driver and communication as the intelligent motor (SmartMotor) and sometimes we call the driver integrate movement control and communication as the intelligent servo driver. Integration of motor, driver and control make the design, manufacturer, operation and maintenance more closely integrated. However, this kind of methods facing more technical challenges(e.g., reliability) and the engineers usage habits challenges, so it’s hard to be the mainstream and as a little part with special features in the whole servo market.

       5.Generalization

       Generalization driver configurate large parameters and rich menu functions convenient for the users setup V/F control, non speed sensor open loop vector control, close loop flux vector control, magnet brushless ac servo motor control and regeneration unit five kinds of working methods, under the non changing parameters conditions. And suitable for various occasions. Drive different series motor, like asynchronous motors, permanent magnet synchronous motor, brushless dc motor, step motor, also suitable for different kinds of sensors, even without position sensors. Using the feedback of the motor-self parameters constitute half close loop control system. And through the interface and external position or speed and torque sensor constitute high precision close loop control system.

       6.Intelligence

       Modern ac servo driver possess the parameters storage, fault self diagnosis and analysis functions. Absolutely import driver possess over load inertia measurement and automatic gain adjustment functions, some of them automatic identify parameters of motor and automatic test encoder zero, some of them automatic run vibration suppress. Integrate electric gear, electric CAM, synchronous tracking, interpolation motion control function with driver, for the servo users, provide better experience.

       7.Network and modularity

       Integrating field can, industrial ethernet technology with even wireless network technology in the servo driver had already been the usual methods of European and America manufacturer. The important direction of modern industry local area network development and various can standard competition focus is how to adjust the requirement of live data transmission, reliability, synchronicity of the high performance movement control. With the requirement of the domestic large scale distributed control devices rising, successful development of high grade CNC system and network digital servo system has become the top priority. Modularity not only be the servo driver module, power module, regenerative braking module and communication module combinations ways, but also refer to the servo driver internal software and hardware modular and reusable.

       8.From fault diagnosis to predictive maintenance

       With the continues development of the machine safety standard, traditional fault diagnosis and protect technology(the problems happens to judge the reasons and take measures to prevent fault expansion)already fall behind, the latest product embedded the predictive maintenance technology, which make the people learn the dynamic tendency of the important technical parameters through the internet and take predictive measures, like pay attention on the rise of current, evaluate the peak current when the over load changes, watch out temperature sensor when the shells and core temperature rise and keep vigilant against any distortion of current waveform.

       9.Specialty and diversification

       Although exist the generalization servo system products series on the market, for some special usage occasion professional design and manufacturer everywhere. Utilizing magnet material different performance, different shape, different surface bonding SPM structure and embedded permanent magnet IPM rotor structure motor. Split iron structure type craft usage in Japan make the magnet brushless servo motor manufacturer reach high efficiency, large quantity and automation and cause domestic manufacturer research.

       10.Miniaturization and large scale

       Whether magnet brushless servo motor or step motor are positive to the smaller size development, like 20, 28 35MM outside diameter; Same time develop the much larger power and size kinds of motor and already have seen the 500KW magnet servo motor. Reflecting the development tendency to the heal.