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Piezoelectric linear motor using resonant-type clamping based on harmonic vibration synthesis |
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| Affiliation: | 1. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China;2. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China;1. Department of Mechanical Engineering, Sogang University, 121-742 #1 Shinsu-dong Mapo-gu, Seoul, Republic of Korea;2. Department of Electrical Engineering, The University of Tokyo, Hongo, Tokyo 113-8656, Japan;1. Centre for Robotics Research (CoRe), Department of Informatics, Kings College London, London WC2R 2LS, UK;2. Medical Research Council (MRC) Centre for Transplantation, King’s College London, King’s Health Partners, Guy’s Hospital, London SE1 9RT, UK;3. College of Engineering, Khalifa University of Science, Technology and Research, Abu Dhabi, United Arab Emirates |
| Abstract: | A piezoelectric linear motor (PLM), which has a mechanism based on synchronized switching control, is composed mainly of a driving unit and a clamping unit. A resonant-type clamping (RTC) unit is developed to increase the working frequency of the motor. The developed RTC unit is a three-layer tuning fork structure with ten pieces of single-layer piezoelectric sheets as driving elements. The RTC unit was designed to have a resonant frequency ratio of 1:3:5 by deliberate design of the lengths and widths of each layer. A resonant-type quasi-square-shaped mechanical wave was obtained combined with the three vibration modes of those layers. A PLM prototype that utilized the developed RTC unit was fabricated and tested. The moving speed of the slider can reach up to 78.3 mm/s at a driving voltage of 240 Vp–p. |
| Keywords: | Resonant-type clamping Piezoelectric linear motor Resonant-type piezoelectric motor Mechanical vibration wave synthesis Synchronized switching control |
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