Continuous Local Material Model for Cut Edge Effects in Soft Magnetic Materials

Efficiency Analysis of Fractional KiloWatt Reluctance Motors with Various Frame Sizes, Taking into Account the Impact of the Punching Process

“…In the FEM model built by Bali and Muetze, the entire degraded area was divided into several sub-areas with fixed properties. In [11], we found a zone model containing heterogeneous material, along with interference in the FEM mesh model parameters. In this case, the authors had the opportunity to define the parameters of individual FEM triangular mesh elements and change their properties according to the analytical dependence.…”

“…Modeling of ferromagnetic having areas with degraded properties is the next area of research. In the literature, we find a description of many algorithms that allow for determining the local properties of ferromagnetic materials (based on macroscopic measurements) and their implementation in FEM models [10][11][12][13][14].An important goal of the work carried out by the authors is to show that for electric motors with relatively small geometrical dimensions, it is necessary to take into account the impact of the technological process on the change in the properties of the magnetic material used in the motor core. Conclusions resulting from the research analysis allow designers to introduce constructional changes, compensating the negative impact of technological processes on electric motor efficiency.…”

“…Modeling of ferromagnetic having areas with degraded properties is the next area of research. In the literature, we find a description of many algorithms that allow for determining the local properties of ferromagnetic materials (based on macroscopic measurements) and their implementation in FEM models [10][11][12][13][14].…”

Higher-order finite element modeling of material degradation due to cutting

“…The order of a finite element depends on the variation of magnetic flux density inside one element. Therefore, the permeability expression (1) is applied to the nonlinear FEA simulation of very dense first order mesh with continuous material model [8]. From the results, the behavior of the flux density is evaluated as a function of the distance from the cut edge.…”

“…Over the years, many researchers have attempted to model this deterioration in the finite element analysis (FEA) of electrical machines by specifying different layers of degraded materials (degradation profile) in the vicinity of the cut edge as presented in [6], [7]. To provide a more accurate analysis of this magnetic degradation effect [8] tried to use a continuous material model. When this cutting deterioration was modeled in the FEA simulation, iron losses were increased up to 20-30% [7], [9], [10].…”