Development of a Hybrid Analytical Model for a Fast Computation of Magnetic Losses and Optimization of Coaxial Magnetic Gears

Abstract

This article focuses on a 2D analytical model for a fast computation of magnetic losses due to eddy currents in the permanent magnets as well as iron losses in the ferromagnetic parts within coaxial magnetic gears. The magnetic field distribution is computed in yokes and permanent magnets by solving both Maxwell's equations, whereas for pole pieces the magnetic field is computed by coupling the previous analytical model with a reluctance network model. Both the eddy current losses and iron losses are determined from this hybrid analytical model. The iron loss model takes into account the temporal and spatial variations of flux density. The eddy current loss model takes into account the magnet splitting. Results of this magnetostatic eddy current loss model are then compared to the results obtained with a 2D magnetodynamic finite element model. A verification of validity limits is also proposed. The final function of this analytical model is to ensure integration into a set of models in the aim of a global mechatronic optimization of magnetic gears, for their insertion into a multi-megawatt wind turbines. A preliminary bi-objective, mass-efficiency optimization protocol is subsequently proposed along with an analysis of the computation time reduction via the presented models.

Preparation and Conductive and Electromagnetic Properties of Fe3O4/PANI Nanocomposite via Reverse In Situ Polymerization

“…The imaginary part of the Fe 3 O 4 /PANI nanocomposite is smaller than that of the pure Fe 3 O 4 in the range of 2~18 GHz. This may be because the PANI encapsulates the magnetic nanoparticles to cause a decrease in saturation magnetization and a decrease in hysteresis loss [63,64].…”

Triple-speed coaxial magnetic gear for wind turbine applications: introduction and comprehensive analysis

“…This paper focuses on a two-dimensional (2D) analytical model for a fast computation of magnetic losses due to eddy currents in the PMs as well as iron losses in the ferromagnetic parts within CMGs (Desvaux et al, 2018).…”

Convergence Analysis of the Fixed-Point Method With the Hybrid Analytical Modeling for 2-D Nonlinear Magnetostatic Problems

“…magnetic saturation is not explained in detail. Moreover, the recent improvements on HAM are discussed in [11] with a focus on increasing the accuracy and computational speed. Lastly, Bao et al present a nonlinear HAM with FPM including the general modeling formulation in [12].…”