Discussion: “Improved Concept and Model of Eddy Current Damper” (Sodano, H. A., Bae, J.-S., Inman, D. J., and Belvin, W. K., , ASME J. Vib. Acoust., characteristics of eddy current damping when a permanent magnet is placed in a model of eddy current damping as the result of a magnet in a copper tube is. Eddy current damper on step motor. Magnetic field fully active For RMIT Honors Thesis Jarrod Caveny.
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The present study investigates analytically and experimentally the characteristics of eddy current damping when a permanent magnet is placed in a conductive tube.
The flow of electrons in the conductor immediately creates an opposing magnetic field which results in damping of the magnet and produces heat inside the conductor similar to heat buildup inside of a power cord during use.
The magnets induce eddy current damping in the aluminum plate, eddy current damping cause a damping force that is transferred to the cart.
A permanent magnet attached to the tip of eddy current damping micrometer mounted at the end of the cart. The magnet induces eddy currents in the aluminum rail trackwhich cause the damping force.
When the cart moves slowly, any damping proportional to the velocity gets very small and may be masked by kinetic rolling friction. Eddy current damping former is proportional to the velocity eddy current damping movement of the conductor, and thus, if the magnetic field is constant, the damping force is proportional to the velocity of the moving system and is zero when there is no movement of the system.
The coil is wound on a light metal former in which eddy currents are induced when the coil moves in the permanent-magnet field.
The directions of the eddy-current which in turn produce the damping torque due to the motion of the coil clockwise are as shown in Fig. The common errors are on account of friction, change in temperature, mechanical unbalances and variation of eddy current damping electrical and mechanical properties of the materials employed with time.