TY - GEN
T1 - Spin motion of a levitated magnet caused by vertical excitation of a high-Tc superconductor
AU - Sugiura, Toshihiko
AU - Hayakawa, Shuuichi
AU - Tanaka, Tsuyoshi
AU - Yoshizawa, Masatsugu
PY - 2002/1/1
Y1 - 2002/1/1
N2 - This research deals with nonlinear dynamics of a permanent magnet freely levitated above a high-Tc superconductor excited in the vertical direction, focusing on generation of spin torque acting on the magnet. Equations of 6 d.o.f. motion, nonlinearly coupled by magnetic force and torque, were described on the assumption that a magnet has an eccentricity between the center of gravity and the magnetic center. Force and torque were evaluated analytically by the flux frozen method. Dynamic behavior of the magnet was examined numerically for different frequencies of excitation. A simplified 2 d.o.f. system with only essential terms was introduced in order to discuss the mechanism of nonlinear coupling which generates spinning from vertical oscillation. Spinning motion of the magnet was examined in detail analytically by the method of harmonic balance. Experiments of vertical excitation were also carried out. Experimental results were compared with numerical ones.
AB - This research deals with nonlinear dynamics of a permanent magnet freely levitated above a high-Tc superconductor excited in the vertical direction, focusing on generation of spin torque acting on the magnet. Equations of 6 d.o.f. motion, nonlinearly coupled by magnetic force and torque, were described on the assumption that a magnet has an eccentricity between the center of gravity and the magnetic center. Force and torque were evaluated analytically by the flux frozen method. Dynamic behavior of the magnet was examined numerically for different frequencies of excitation. A simplified 2 d.o.f. system with only essential terms was introduced in order to discuss the mechanism of nonlinear coupling which generates spinning from vertical oscillation. Spinning motion of the magnet was examined in detail analytically by the method of harmonic balance. Experiments of vertical excitation were also carried out. Experimental results were compared with numerical ones.
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M3 - Conference contribution
AN - SCOPUS:78349238239
SN - 0791836282
SN - 9780791836286
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 155
EP - 163
BT - Design Engineering
PB - American Society of Mechanical Engineers (ASME)
ER -