The 1960s was the time when hydraulic servos were the primary stream in the servo sector, at the exact same time there were increasing needs in electrical servo as a result of issues on maintenance or oil leak. For that reason, it was the objective for electric motor makers to recognize better responsiveness and accuracy than a hydraulic servo. Also, Yaskawa Electric accomplished the mission in advance of the world and generated DC servo-electric motor, Minertia Motor. The item story of Minertia Electric motor is important for Yaskawa Electric to describe its innovation.
With the development in electronic devices technology given that 1970s on the back, DC servo-electric motors reached their height in the 1980s. On the other hand, DC servo-electric motors always included concerns of periodic brush changings and dirt discharge because of wear. Although the AC servo motor which does not need brush concerned launch in the early 1980s, its control performance was far from DC servo-electric motor’s as it utilizes analog control along with a microcomputer with 8bits CPU.
In the late 1980s, all electronic regulated AC servo-electric motors were marketed. And in the 1990s, AC servo-electric motors saw a substantial renovation in their control efficiency many thanks to the use of ASIC as well as 16bits microcomputer along with the velocity in area data transmission from detectors by means of serial communication. Along with these enhancements in amplifier and also the performance of control, the innovation allowed the electric motor to use powerful Nd-Fe-B magnet to its long-term magnet and understood both radical downsizing as well as responsiveness.
As the semiconductor and fluid crystal industry ended up being energetic from the 1990s via the 2000s, the manufacturing equipment for those products began to install a substantial volume of A/C servo motors. In 2017, the number of servo motors produced by Japanese firms internationally increased to approx. 7.9 million (sourced by Fuji Keizai. By the way, the number of servo-electric motors generated in Japan in 2007 was approx. 2.34 million). Additionally, there were also increased demands for cleaner and even more accurate servo motor, which caused the development of direct motors and also direct-drive motors.
If you need to know about the Servo motor control unit [ควบคุม servo motor, which is the term is Thai], please visit the link.