Affiliations: [a] Department of Mechanical and Automotive Engineering, Kongju National University, Seobuk-gu, Cheonan-si, Chungcheongnam-do, Republic of Korea | [b] Printed Electronics Research Team, Korea Institute of Machinery and Materials, Yuseong-Gu, Daejeon, Republic of Korea | [c] Korea Railroad Research Institute, Future Innovation R&D Strategy Division, Uiwang-si, Gyeonggi-do, Repulbic of Korea | [d] Department of Mechanical Engineering, Ajou University, Yeongtong-gu, Suwon-si, Gyeonggi-do, Republic of Korea | [e] Department of Safety Engineering, Seoul National University of Science and Technology, Nowon-gu, Seoul, Republic of Korea
Correspondence:
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Corresponding author: Jae-Yong Lim, Department of Safety Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea. Tel.: +82 2 970 6388; Fax: +82 41 555 9123; E-mail: jylim@seoultech.ac.kr
Abstract: Magnetic levitation is state-of-the-art technology to realize 6 degree of freedom motion stages. The major weakness of magnetic levitation technology is the small force of the actuators, since electromagnetic actuators usually have small force compared to other actuators. Moreover, they always have to be turned on in order to compensate for the weight of the stage. In this paper, voice coil motors, a kind of electromagnetic actuator, are designed for a magnetic levitation stage. Two different types of voice coil motors are mathematically modeled, analyzed and optimized to obtain high force. According to the optimized final designs, the voice coil motors are manufactured and their performances are evaluated. The optimal design results are compared with the finite element simulations and the test results of the manufactured products. Both types of voice coil motors show high force. The results are quantified and compared. Through the design process and the evaluation of the voice coil motors, a practical design guideline for a voice coil motor is suggested.
Keywords: Voice coil motor, optimal design, aspect ratio, force capacity
