Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Large Thrust Linear Motor for Low-duty-cycle Operation

고추력 저가동률 리니어모터에 관한 연구

  • 방영봉 (서울대학교 기계항공학부) ;
  • 이경민 (서울대학교 기계항공학부 대학원)
  • Published : 2002.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents a linear motor, which generates large thrust with a low operating rate. In industrial fields there is a need for actuators that work with a low duty cycle but generate large thrusts. An example of such a case is provided by the actuators for ejector mechanisms in electric injection molding machines. The ordinary LSM (linear synchronous motor) is unsuitable for this large-thrust and low-operating-rate usage, because of its large size and high cost. This paper contains experimental results on linear motors that can generate large thrusts for a short time, and which can be cheaply produced. The described linear motor could be contained space of $250mm \times250mm\times 250mm$ and generate a maximum thrust of about 20000 N at a current of 250 A.

Keywords

References

  1. Y-B Bang and S Ito, 'Linear Motor Drive Ultra High Speed Injection Molding Machine,' Proceeding of the Institution of Mechanical Engineers Part B, to be published https://doi.org/10.1243/0954405021520283
  2. Akira Yamori, Masahisa Yanagisawa, Kei-ichi Sato, Nobuki Kawashima, Rail gun experiment (HYPAC) at ISAS. IEEE Transactions on magnetics 1991; 27(1):126-129 https://doi.org/10.1109/20.101007
  3. I. Aoki and T. Higuchi, 'Quick stopping system of high-speed movement by electromagnetic force and its applications,' Proceedings of the Third International ISEM Symposium on the Application of Electromagnetic Forces, pp. 523-526, 1992
  4. Yusof Hojjat and Toshiro Higuchi, 'Application of Electromagnetic Impulsive Force to Precise Positioning,' International Journal of The Japan Society for Precision Engineering, Vol. 25, No. 1, pp. 39-44, 1991
  5. FANUC Linear motor catalogue, 2001
  6. S. A. Nasar, I. Boldea, 'Linear motion electric machine,' A Wiley-Interscience Publication, pp. 28, pp. 244-255, 1976
  7. C. W. Green and R. J. A. Paul, 'Application of dc linear machine as short stroke and static actuators,' Proc. IEE, Vol. 116, pp. 599-604, 1969