Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2015.10.3.1349
Title & Authors
Analysis of Contact Force in Eddy-current System Using the Virtual Air-Gap Concept Park, Byung Su; Kim, Hwi Dae; Choi, Hong Soon; Park, Il Han;
It is difficult to calculate the magnetic force of an object of magnetic material in contact with other objects using the existing methods, such as Maxwell stress tensor method, magnetic charge method, or magnetizing current method. These methods are applicable for force computation only when the object is surrounded by air. The virtual air-gap concept has been proposed for calculating the contact force. However, its application is limited to magneto-static system. In this paper, we present the virtual air-gap concept for contact surface force in the eddy-current system. Its validity and usefulness are shown by comparison between numerical and experimental examples.
Magnetic contact force;Maxwell stress tensor;Finite element analysis;Virtual air-gap;
K. Rechert, H. Freundl and W. Vogt, “The calculation of force and torque within numerical magnetic field calculation method,” in Proc. COMPUMAG, 1976, pp.64-74.
Carlos Rinaldi and Howard Brenner, "Body versus surface forces in continuum mechanics- Is the Maxwell stress tensor a physically objective Cauchy stress." in PHYSICAL REVIEW E, Vol. 65, 0.6615.
L. H. de Medeiros, G. Reyne, G. Meunier, and J. P. Yonnet, “Distribution of electromagnetic force in permanent magnets,” IEEE Trans. Magn., vol. 34, no. 5, pp. 3012-3015, Sep. 1998.
Hong Soon Choi, Joon Ho Lee, and Il Han Park, “Separation of Each Torque Component on Parts of Electric Machine Using Magnetic Force Density,” IEEE Transactions on Magnetics, Vol. 41, No. 5, May 2005
Jang Ho Seo and Hong Soon Choi, "Computation of Magnetic Contact Forces." IEEE Magnetics 2014 to be published.
S. H. Lee, I. H. Park, and K. S. Lee, “Comparison of mechanical deformation due to different force distributions of two equivalent magnetization models,” IEEE Trans. Magn., vol. 34, no. 4, pp. 1368-1372, Jul. 2000.
H. S. Choi, S. H. Lee, and I. H. Park, “General formulation of equivalent magnetic charge method for force density distribution on interface of different materials,” in Proc. CEFC, Jun. 2004, p. 15.
Byung Su Park, Hong Soon Choi, and Il Han Park, “Analysis of Contact Force in Eddy-current System Using the Virtual Air-Gap Concept,” ICEE, 2014.