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Finite-element computation of nonlinear magnetic diffusion and its effects when coupled to electrical, mechanical, and hydraulic systems

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2 Author(s)
J. R. Brauer ; Ansoft Corp., Pittsburgh, PA, USA ; I. D. Mayergoyz

Finite elements are used to compute eddy currents and magnetic diffusion times in steel cylinders with nonlinear B--H curves. Computations are made of diffusion times versus current in a typical axisymmetric magnetic actuator, showing good agreement with recently published approximate analytical formulas. The computed nonlinear diffusion times are then used to derive an equivalent resistor that is used in a model of an electrohydraulic system. The diffusion time causes delays in the coupled mechanical and hydraulic responses.

Published in:

IEEE Transactions on Magnetics  (Volume:40 ,  Issue: 2 )