Modern servo motor ac servo system, has experienced the transition from analog to digital, digital control loop is everywhere, such as phase, current, speed and position control; Using new type of power semiconductor devices, high performance DSP and FPGA, and the servo module is not surprising. International manufacturers of servo products every five years will, every 2 ~ 2 new power device or module. Will update once 5 years, new software algorithm is rapid, short product life cycles are getting shorter. Summarizes the technical route of the servo manufacturers at home and abroad and product line, combining with the change of market demand, can see some latest development trend of the following: 1, high speed, high precision, high performance-based and higher accuracy of the encoder (Turn every million pulse)Digits, faster, higher sampling precision and data of DSP, no the cogging effect of high performance rotary motor, linear motor, and the application of adaptive control, artificial intelligence and other modern strategy, continuously improve servo system of indexes. 2, integration and integrated motor, drive, communication, feedback, control of vertical integration become the small power servo system is a development direction. Sometimes we call this integrates the motor drive and communication of intelligent motor (SmartMotor), sometimes we call integrated motion control and communication drive intelligent servo driver. Motor, drive and control from design, manufacturing to the integration of three operation and maintenance are more closely integrated. But the greater technical challenge this way (Such as reliability)And engineers use habits of challenge, so it is difficult to become mainstream, in the whole servo market has distinguishing feature is a small part. 3, generalized universal actuator configuration and rich menu functions, there are a large number of parameters is convenient for users under the condition of without changing the hardware configuration, convenient to set V/F control, open loop of speed sensorless vector control, the closed-loop flux vector control, permanent magnet brushless ac servo motor control and regeneration unit five works such as control engineering net all rights reserved, suitable for various occasions, can drive different types of motors, such as asynchronous motor, permanent magnet synchronous motor, brushless dc motor, step motor, also can adapt to different sensor types even without position sensor. You can use the motor itself, constitute a half closed loop feedback control system configuration, also can through the interface and external position or speed or torque sensor constitute a high precision closed loop control system. 4, intelligent modern ac servo drives have parameters memory, fault self-diagnosis and analysis function, the vast majority of imports drive has function of load inertia measurement and automatic gain adjustment, some can automatically identify the motor parameters, automatic determination of encoder zero, while others can automatically suppress vibration. Electronic gear, electronic CAM, synchronous tracking, interpolation motion control function and drive together, such as for servo users, provides better experience. 5, network and modularization can fieldbus and industrial Ethernet technology, and even of the wireless network technology integration to the servo drive, has become a common European and American manufacturers. The important direction of modern industrial local area network (LAN) and various bus standard competition focus is how to adapt to the high performance motion control to the requirement of real-time data transmission, reliability, synchronicity. As the rising domestic demand for large-scale distributed control device, the successful development of high-grade CNC system, the development of networked digital servo has become the top priority. Modular refers not only to the servo driver module, power module, regenerative braking module, communication module between combinations, and refers to the servo drive internal software and hardware modular and reusable. 6, from the fault diagnosis to the predictive maintenance with the continuous development of the machine safety standards, the traditional fault diagnosis and protection technology (Problem occurs when judging reasons and take measures to prevent failure expansion)Already moss-grown, the latest product embedded in the predictive maintenance technology, can make people through the Internet trends in the dynamic of important technical parameters in time, and take preventive measures. Such as: pay attention to the rise of current, load change assessment of peak current, shells or core temperature monitoring temperature sensor, and to be vigilant against any current waveform distortion. 7, specialty and diversification though exist generalization of servo products on the market, but for some specific applications specially design and manufacture of servo system. Using magnetic material different performance, different shape, different surface bonding structure (SPM)And embedded permanent magnet (IPM)The structure of the motor rotor, split type iron core structure of the use of technology in Japan of the permanent magnet brushless servo motor production to achieve the high efficiency, large quantity and automation, and research of domestic manufacturer. 8, miniaturization and large permanent magnet brushless servo motor and step motor are positive to the smaller the size of the development, such as 20,28,35 mm outside diameter; Also in the development of more powerful and size of the model, have seen the emergence of 500 kw permanent magnet servo motor. Reflecting the development tendency to heal.
