Axial Flux PM In-Wheel Motor for Electric Vehicles: 3D Multiphysics Analysis

Credo, Andrea; Tursini, M.; Villani, Marco; Lodovico, Claudia Di; Orlando, Michele; Frattari, Federico

doi:10.3390/en14082107

Cited by 16 publications

(6 citation statements)

References 17 publications

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“…The reduction of flux leakage outside the channel area, by using a coating of low magnetic permeability, is of great importance, in particular in the case of higher ripples of the magnetic field, as it limits eddy current losses that would take place in the material of rotor sheets [33]. It is of great importance, as the power of these losses conveyed in the form of heat would additionally heat the permanent magnets [34], which adversely affects their lifetime. The drawing Figure 1 presents, in a schematic way, the structure of the rotor disc with the elements of a magnetic channel.…”

Section: Proposed Machine Constructionmentioning

confidence: 99%

Innovative Construction of the AFPM-Type Electric Machine and the Method for Estimation of Its Performance Parameters on the Basis of the Induction Voltage Shape

Smoleń

Gołębiowski

2021

Energies

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The article presents an innovative construction of the Axial Flux Permanent Magnet (AFPM) machine designed for generator performance, which provides the shape of induced voltage that enables estimation of the speed and rotational angle of the machine rotor. Design solutions were proposed, the aim of which is to limit energy losses as a result of the occurrence of eddy currents. The method of direct estimation of the value of the rotational speed and rotational angle of the machine rotor was proposed and investigated on the basis of the measurements of induced voltages and machine phase currents. The advantage of the machine is the utilization of simple and easy-to-use computational procedures. The acquired results were compared with the results obtained for estimation performed by using the Unscented Kalman Filter (UKF).

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Section: Proposed Machine Constructionmentioning

confidence: 99%

Innovative Construction of the AFPM-Type Electric Machine and the Method for Estimation of Its Performance Parameters on the Basis of the Induction Voltage Shape

Smoleń

Gołębiowski

2021

Energies

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“…In addition, the absence of the stator yoke in the YASA type makes it more efficient and higher power density. But technological process to manufacture YASA motors is complex, exigent, difficult, and expensive [17,18]. A coreless axial flux in-wheel machine with Halbach array design is presented in ref.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluating of rotor arrangement on high torque density in‐wheel permanent magnet machines

Wang

2023

IET Electric Power Appl

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This article presents a new rotor with fractional slot distribution winding permanent magnet (FSDWPM) machine to improve the torque density of in‐wheel motor. In order to achieve the high torque/power density and reduced material weight with constrained rotor inner diameter and stator outer diameter, three traditional rotor topologies, including single‐layer V‐shaped, double‐layer V‐shaped, and delta‐type, are selected and compared with the proposed FSDWPM machine. Subsequently, the corresponding basic electromagnetic performances, including open‐circuit back‐EMFs, on‐load torque, and efficiency distributions, of the four machines are investigated and compared by finite element (FE) analysis. The simulated results shows that the proposed rotor arrangement exhibits the highest average torque, excellent field‐weakening capability, the largest high‐efficiency region compared with conventional rotor structures. Finally, a 50 kW FSDWPM machine prototype with double‐layer PM arrangement is manufactured, and some experimental results are conducted to confirm the feasibility and effectiveness of the proposed design.

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“…For AFPM motors with tooth slots in the stator, the electromagnetic vibration caused by the tooth slots is the main source of motor vibration [11]. In addition, it can also lead to large axial electromagnetic forces between the stator and rotor, which cause difficulties in the structural design and assembly of the motor [12,13].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimization Design of a Stator Coreless Multidisc Axial Flux Permanent Magnet Motor

et al. 2022

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The stator coreless axial flux permanent magnet (AFPM) motor with a compact structure, low torque ripple, and high efficiency is particularly suitable as a motor for electric propulsion systems. However, it still requires great effort to design an AFPM motor with higher torque density and lower torque ripple. In this paper, a stator coreless multidisc AFPM (SCM-AFPM) motor with a three-rotor and two-stator topology is proposed. To reduce rotor mass and increase torque density, the proposed SCM-AFPM motor adopts the hybrid permanent magnets (PMs) array with Halbach PMs in the two-terminal rotor and the conventional PMs array in the middle rotor. In addition, a multi-objective optimization model combining response surface method (RSM) and genetic algorithm (GA) is proposed and applied to the proposed SCM-AFPM motor. With the help of the three-dimensional finite-element analysis (3-D FEA), it is found that the torque ripple of the optimized SCM-AFPM motor is 4.73%, while it is 6.21% for the initial motor. Its torque ripple is reduced by 23.8%. Therefore, the proposed multi-objective optimization design method can quickly and reliably obtain the optimal design of the SCM-AFPM motor.

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Axial Flux PM In-Wheel Motor for Electric Vehicles: 3D Multiphysics Analysis

Cited by 16 publications

References 17 publications

Innovative Construction of the AFPM-Type Electric Machine and the Method for Estimation of Its Performance Parameters on the Basis of the Induction Voltage Shape

Innovative Construction of the AFPM-Type Electric Machine and the Method for Estimation of Its Performance Parameters on the Basis of the Induction Voltage Shape

Performance evaluating of rotor arrangement on high torque density in‐wheel permanent magnet machines

Multi-Objective Optimization Design of a Stator Coreless Multidisc Axial Flux Permanent Magnet Motor

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