Selection of Induction Machine Models for Efficiency Evaluation in Electric Vehicles

Design and comparison of dual‐stator axial‐field flux‐switching permanent magnet motors for electric vehicle application

“…Cogging torque is derived from the energy stored in the magnetic field relative to the variation of the angular position of the rotor [20]: $$${T}_{\mathrm{c}\mathrm{o}\mathrm{g}}=-\frac{\partial W}{\partial \theta }$$$ …”

“…Figure 14b the faulty model exhibited for the IDYR topology. The position of the rotor angle with respect to the reference position is represented by the angle of inclination, and the values of the static eccentricity factor (SEF) are defined by the following equation [20]. $$$\%\mathrm{S}\mathrm{E}\mathrm{F}=\frac{{r}_{i}\,\mathrm{sin}(\alpha )}{{g}_{0}}\times 100\%$$$ where $${r}_{i}\,\mathrm{sin}(\alpha )$$ is the rotor deviation distance from the original axis, and $${g}_{0}$$ is the rotor height.…”

“…Figure 14b the faulty model exhibited for the IDYR topology. The position of the rotor angle with respect to the reference position is represented by the angle of inclination, and the values of the static eccentricity factor (SEF) are defined by the following equation [20].…”

“…Cogging torque is derived from the energy stored in the magnetic field relative to the variation of the angular position of the rotor [20]:…”

Losses in Efficiency Maps of Electric Vehicles: An Overview

“…It is obvious that in the experimental measurement all categories of losses are included for the EM extraction. Comparison of the results of the computational methods such as finite-element analysis (FEA) or analytical methods with the experimental shows that the most important sources of the losses belong to the conductive and iron losses [27]. Therefore, most of the finite element-based and analytical models used in the efficiency studies tried to model these two portions of the losses accurately [28,29].…”