円形導体と部分環状磁石より構成されるねじり形磁気ダンパの開発 : 第1報,磁束の取扱いの簡略化について

概要

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This paper is concerned with a method for analyzing a rotary magnetic damper (eddy current brake) consisting of a sector magnet (sector magnetic flux) and a circular conductor. Since the magnetic flux density is a function of the position in the radial direction, the analytical solution for obtaining the eddy current, braking force and damping coefficient is arrived at by dividing the magnetic flux into the narrow sector bonds, and applying the unit step function to solve the differential equation of the electromagnetic fields. Numerical calculations have been carried out for the dimensionless damping coefficients versus the flux range, the position and the distribution of the magnetic flux in the radial direction. Experimental tests are also carried out to verify the present theoretical results. The theoretical results are in good agreement with the experimental ones, and the characteristics of the rotary magnetic damper have been investigated in detail, with the optimal values of the damping coefficient having been clarified.
一般社団法人日本機械学会の論文
1985-12-25