Learning Forum

[dhruvdeshwal17]

Hello,If a 3D conductor (conducting plate) is translating in a magnetic field (generated due to a magnet) with a constant velocity.nhow to calculate the force exerted on the conductor plate due to the change of magnetic field.nIn the ANSYS guide it is mention that considering the velocity effect of a moving body (translating), it should be an infinitely long conductor. So how model an infinitely long plate of a certain thickness.nPlease guide me for the same.nYours Sincerelyn

[Dave Looman]

You could physically move the plate in a large deflection transient analysis with displacements using the magneto-structural option of elements 223/226/227. The movement couldn't be very large as the air elements are distorted by the relative motion of the plate to the magnet. Resistivity should be specified for the plate. To quickly obtain a steady state velocity in a short solution time, an initial velocity of the plate should be specified with the IC command and then continued with the non-zero D commands.n

[dhruvdeshwal17]

Thank You Sir for your suggestion.n

[Erik Kostson]

HiAs we said the APDL solver is not suitable for this as the elements representing the air would distort and can thus not capture this.nnWe do though have a BEM/FEM EM solver (Ansys LS-Dyna) which is perfectly suited for this type of problems since we do not have to create a mesh for the air domain.nWith this solver we can capture the type of phenomena that you mention and even extreme cases of EM braking like the dropping magnet in a Faraday-Lenz experiment modeled here below with LS-Dyna:nFor more info on our BEM/FEM EM Solver and for some examples see here:nn