Improvement and Application of the Viscous-Type Frequency-Dependent Preisach Model

Finite Element Simulation by Free Software Tools

“…The schematic view of the problem can be seen in fig. 3, which is a lamination placed into a magnetic field defined by the time varying of one single frequency [23,24]. The thickness d of the lamination is much smaller than the other two dimensions, i.e.…”

“…The following Maxwell's equations must be solved to simulate the lamination core taking eddy currents into account [23,24]:…”

“…These terms are calculated by the FEM procedure. Decreasing the frequency of excitation, the term is decreasing automatically, is the frequency independent term of the magnetic field intensity [24].…”

“…The last term is responsible for the anomalous or excess losses [23,24,28]. The advantages and convergence properties of the fixed point technique can be hold by introducing the excess field term in the Maxwell's equations as follows [24]: , , , i.e. the decomposition of the nonlinear constitutive relationship must be rewritten.…”

“…7. Here, the so-called vector Preisach model of hysteresis [17,24,27] has been implemented in the FEM code combining it with the fixed-point scheme [25,26].…”