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2023
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Development history of servo motor
Author：
Since the Indramat branch of Rexroth Company of MANNESMANN in Germany officially launched the MAC permanent magnet AC servo motor and drive system at the Hannover Trade Fair in 1978, this marks that this new generation of AC servo technology has entered the practical stage.
Since the Indramat branch of Rexroth Company of MANNESMANN in Germany officially launched the MAC permanent magnet AC servo motor and drive system at the Hannover Trade Fair in 1978, this marks that this new generation of AC servo technology has entered the practical stage. By the middle and late 1980s, each company had a complete series of products. The entire servo market has moved to AC systems. The early analog system has deficiencies in aspects such as zero drift, anti-interference, reliability, precision and flexibility, and cannot fully meet the requirements of motion control. In recent years, with the application of microprocessors and new digital signal processors (DSP) , a digital control system has appeared, and the control part can be completely carried out by software, which are called DC servo system and three-phase permanent magnet AC servo system respectively.
Most of the high-performance electric servo systems use permanent magnet synchronous AC servo motors, and the control drives mostly use fast and accurate positioning full-digital position servo systems. Typical manufacturers include German Siemens, American Kollmorgen, Japanese Panasonic and Yaskawa and other companies.
The small AC servo motors and drivers launched by Japan Yaskawa Electric Manufacturing Co., Ltd., among which D series is suitable for CNC machine tools (maximum speed is 1000r/min, torque is 0.25 ~ 2.8Nm), R series is suitable for robots (maximum speed is 3000r/min, The torque is 0.016～0.16Nm). Later, six series of M, F, S, H, C, and G were launched. In the 1990s, new D series and R series were successively launched. Changed from the old series of rectangular wave drive, 8051 single-chip microcomputer control to sine wave drive, 80C, 154CPU and gate array chip control, the torque fluctuation is reduced from 24% to 7%, and the reliability is improved. In this way, it took only a few years to form a relatively complete system of eight series (power range 0.05 ~ 6kW), which meets the needs of working machinery, handling mechanisms, welding robots, assembly robots, electronic components, processing machinery, printing machines, Different needs for high-speed winding machines, winding machines, etc.
Drive System,servo motor
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