High-precision and high-speed positioning of 100 G linear synchronous motor |
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| Affiliation: | 1. Department of Physics, Razi University, Kermanshah, Iran;2. Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran;1. Health Management Center, Hospital of University of Electronic Science and Technology of China and Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China;2. Sichuan Provincial Key Laboratory for Disease Gene Study, Hospital of University of Electronic Science and Technology of China and Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China;3. School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, China;4. West China School of Public Health, Sichuan University, Chengdu, China;1. College of Computer and Information, Anhui Polytechnic University, Wuhu 241000, China;2. Institute of Software, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China;3. Key Laboratory of High Confidence Software Technologies, Peking University, Ministry of Education, China;4. Shanghai Key Laboratory of Trustworthy Computing, East China Normal University, Shanghai 200062, China |
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| Abstract: | The present paper describes a moving permanent magnet linear synchronous motor (MPM LSM) that can move with an acceleration above 100 G (=980 m/s2), and is also capable of high-precision and high-speed positioning. The MPM LSM consists of a mover including permanent magnets and a double-sided electromagnet stator. It can produce a thrust of 4.56 × 103 N and has a working range wider than 1 m. The MPM LSM mover is improved for light weight and is driven using a suitable phase lead for flux weakening. The combination of the improved mover and the suitable phase lead provides motion at an acceleration above 100 G and a velocity above 12 m/s. The positioning characteristics of the improved MPM LSM are examined using a controller with two suitable phase lead functions. The control system shows a positioning accuracy and a positioning resolution of 500 nm, which is similar to the vibration amplitude of the sensor output in open loop. In 300-mm step positioning, the improved MPM LSM shows an acceleration above 660 m/s2 and a velocity above 8.3 m/s. It takes less than 101 ms to reduce the positioning error to less than 5 μm. The temperature rise during positioning is also examined experimentally. Continuous positioning for longer than 30 minutes increases the temperature of the MPM LSM, but by less than 6 °C. |
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| Keywords: | Linear synchronous motor Precision positioning Acceleration Temperature characteristics Thrust-to-mover mass ratio Phase lead Flux-weakening |
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