Future development trend of servo motor industry

Modern AC servo system, after experiencing the changes from imitation to digitization, its internal digital control loop is now ubiquitous, such as commutation, current, speed and azimuth control, etc.; its completion is mainly through new power semiconductor devices, like high The function of DSP plus FPGA, and even the dedicated servo module is also very simple. In addition, new power devices or modules are updated every 2 to 2.5 years, and new software algorithms are also changing with each passing day. Servo products of international manufacturers are also updated approximately every 5 years-after all, the product life cycle is getting shorter and shorter , The changes are getting faster and faster. Summarizing the technical roads and product roads of domestic and foreign servo manufacturers, and contacting the changes in market demand, you can see the latest trends in the following servo motor systems: 　　High efficiency 　　   Although high efficiency has always been the most important issue for servo systems, it still needs to be strengthened. It mainly includes the high efficiency of the motor itself: such as the improvement of the function of the permanent magnet material and the very good structure of the magnet equipment; also the high efficiency of the drive system: including the optimization of the inverter drive circuit, the optimization of the acceleration and deceleration movement, and the regeneration system. Dynamic and energy response and very good cooling methods. 　　Direct drive 　　  Direct drive includes turntable servo drive with disk motor and linear servo drive with linear motor. Since the transmission error of the base mechanical transmission equipment is eliminated, high speed and high positioning accuracy are achieved. The linear motor's feature of simply changing the shape can make various equipment using linear linear organization miniaturization and lightweight. 　　High speed, high precision, high function Choose higher-precision encoders, higher sampling accuracy and data bits, faster DSP, high-performance rotary motors and linear motors without cogging, and various modern control strategies such as self-learning and artificial intelligence. Constantly improve the basic policy of the servo system. 　　Integration and integration 　　  The vertical integration of motor, response, control, drive, and communication became an opening direction of the low-power servo system at that time. Sometimes we call this integrated drive and communication motor an intelligent motor, and sometimes we call the integrated motion control and communication drive an intelligent servo drive. The integration of motors, drives, and controls makes the three more closely integrated from planning, manufacturing, operation, and maintenance. However, this method is faced with greater technical challenges and the challenges of engineers using habits, so it is difficult to become a mainstream, and it is a small and characteristic part of all servo markets.  Universal The universal drive is equipped with many parameters and rich menu functions, which is convenient for users to easily set to V/F control, speed sensorless open-loop vector control, closed-loop magnetic flux vector control, and permanent magnet without changing the hardware configuration. Five operating methods, including brushless AC servo motor control and regeneration unit, are suitable for various occasions and can drive different types of motors, such as asynchronous motors, permanent magnet synchronous motors, brushless DC motors, stepping motors, and can also be used Different sensor types and even no orientation sensors. The response of the motor itself can be used to form a semi-closed-loop control system, or it can be connected to an external position or speed or torque sensor to form a high-precision full-closed-loop control system. 　　Intelligent Modern AC servo drives have the functions of parameter recall, fault self-diagnosis and analysis. Most drives have the functions of load inertia measurement and automatic gain adjustment. Some can automatically identify the parameters of the motor and automatically determine the zero position of the encoder, and some can Automatic vibration suppression. Linking control functions such as electronic gears, electronic cams, synchronous tracking, and interpolation motions with the drive provides a very useful approach for servo users.