A Coupled System of a Magnet and Magnetic Fluid in a U-Tube under Reciprocating Traveling Magnetic Field

Abstract:

A coupled system of a magnet and magnetic fluid is used as a piston in a U-tube. Applying reciprocating travelling magnetic field produces reciprocating motion of the coupled system. In this study, vibration properties of the coupled system are investigated experimentally. Three types of vibration mode of the coupled system appear and the mode depends on the frequency and intensity of travelling magnetic field and the shape of the magnet. Basically the coupled system follows the travelling magnetic field in the range of low frequency, while the system cannot follow the travelling field when the frequency of the travelling magnetic field is high. However, when the magnet is sphere or short cylinder, the other type of vibration appears in the range of low frequency and the coupled system intermittently tracks the travelling magnetic field.

• Periodical: Materials Science Forum (Volume 670)
• Pages: 207-214
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.670.207
• Online since: December 2010
• Authors: Yasushi Ido, Koichi Hayashi, Takahiro Kunitomo
• Keywords: Actuator, Coupled System, Magnetic Fluid, Travelling Magnetic Field, U-Tube, Vibration

References

[1] R. E. Rosensweig, Ferrohydrodynamics, Cambridge University Press, (1985).

[2] A. Sato, T. Oyama, K. Koike and S. Kamiyama, Proc. KSME/JSME Therm. Fluid Eng., 310 (1990).

[3] S. Kamiyama and K. Koike, Brazilian J. Phys., 25, 83 (1995).

[4] S. Sudo, T. Yano M. Okabe and T. Komatsu, Int. J. Appl. Elect. Mech., 25, 95 (2007).

[5] H. Suzuki, and Y. Mitamura, Tech. Rep. IEICE., MBE2003-24, 16 (2003) (in Japanese).

[6] Y. Ido, H. Nakagawa, T. Kunitomo and H. Kawai, Int. J. Appl. Elect. Mech., 28, 33 (2008).

[7] Y. Ido and K. Tanaka, J. Magn. Magn. Mat., 252, 344 (2002).