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Search Results (5)

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Keywords = axial-flux permanent magnet wheel motor

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19 pages, 7431 KiB  
Article
Quantitative Comparisons of Outer-Rotor Permanent Magnet Machines of Different Structures/Phases for In-Wheel Electrical Vehicle Application
by Jinlin Gong, Benteng Zhao, Youxi Huang, Eric Semail and Ngac Ky Nguyen
Energies 2022, 15(18), 6688; https://doi.org/10.3390/en15186688 - 13 Sep 2022
Cited by 5 | Viewed by 3070
Abstract
As one of the key components, low-speed direct-drive in-wheel machines with high compact volume and high torque density are important for the traction system of electric vehicles (EVs). This paper introduces four different types of outer-rotor permanent magnet motors for EVs, including one [...] Read more.
As one of the key components, low-speed direct-drive in-wheel machines with high compact volume and high torque density are important for the traction system of electric vehicles (EVs). This paper introduces four different types of outer-rotor permanent magnet motors for EVs, including one five-phase SPM machine, one three-phase IPM machine with V-shaped PMs, one seven-phase axial flux machine (AFM) of sandwich structure and finally one hybrid flux (radial and axial) machine with a third rotor with V-shaped PMs added to the AFM. Firstly, the design criteria and basic operation principle are compared and discussed. Then, the key properties are analyzed using the Finite Element Method (FEM). The electromagnetic properties of the four fractional slot tooth concentrated winding in-wheel motors with similar dimensions are quantitatively compared, including air-gap flux density, electromotive force, field weakening capability, torque density, losses, and fault tolerant capability. The results show that the multi-phase motors have high torque density and high fault tolerance and are suitable for direct drive applications in EVs. Full article
(This article belongs to the Special Issue Advanced Design and Control of Multiphase Machines)
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13 pages, 4751 KiB  
Article
Digital Pole Control for Speed and Torque Variation in an Axial Flux Motor with Permanent Magnets
by Adrián González-Parada, José Merced Lozano-García and Mario Alberto Ibarra-Manzano
Electronics 2022, 11(3), 482; https://doi.org/10.3390/electronics11030482 - 7 Feb 2022
Cited by 2 | Viewed by 2383
Abstract
The use of renewable energies in the transportation industry has prompted the development of higher power electric motors and intelligent electronic traction systems. However, the typical coupling between the two continues to be mechanical, which reduces its efficiency and useful life. On the [...] Read more.
The use of renewable energies in the transportation industry has prompted the development of higher power electric motors and intelligent electronic traction systems. However, the typical coupling between the two continues to be mechanical, which reduces its efficiency and useful life. On the other hand, permanent magnet axial flux motor configurations make it possible to dispense with mechanical couplings, due to their high torque at low speeds due to their direct application on the wheels of vehicles. In this work, the design of a digital pole commutation system is presented, applied to an axial flux motor with permanent magnets for speed and torque control at a constant speed. The performance of the system is evaluated with experimental measurements; proving the effectiveness of the design, obtaining torques of up to 1784 Nm without extra mechanical couplings and maximum speed regulation errors of 8.43%. Full article
(This article belongs to the Section Electrical and Autonomous Vehicles)
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18 pages, 7678 KiB  
Article
Axial Flux PM In-Wheel Motor for Electric Vehicles: 3D Multiphysics Analysis
by Andrea Credo, Marco Tursini, Marco Villani, Claudia Di Lodovico, Michele Orlando and Federico Frattari
Energies 2021, 14(8), 2107; https://doi.org/10.3390/en14082107 - 9 Apr 2021
Cited by 21 | Viewed by 9687
Abstract
The Axial Flux Permanent Magnet (AFPM) motor represents a valid alternative to the traditional radial flux motor due to its compact structure; it is suitable for in-wheel applications so that the transmission gear can be suppressed. The modeling of the motor is a [...] Read more.
The Axial Flux Permanent Magnet (AFPM) motor represents a valid alternative to the traditional radial flux motor due to its compact structure; it is suitable for in-wheel applications so that the transmission gear can be suppressed. The modeling of the motor is a purely Three-Dimensional (3D) problem and the use of 3D finite element tools allows the attainment of accurate results taking also into account the effects of the end-windings. Moreover, a 3D multiphysics analysis is essential to evaluate not only the motor performance and its thermal behavior, but also the electromagnetic forces acting on the surfaces of the stator teeth and of the magnets that face the air gap. Moreover, as the vehicle’s motors often work in variable-speed conditions, the prediction of vibrations and noise for electric motors over a wide speed range is usually necessary. The paper presents a double-sided AFPM motor for a small pure electric vehicle; the basic drive architecture includes four axial flux motors installed directly inside the vehicle’s wheels. The aim is to propose advanced and integrated electromagnetic, vibroacoustic and thermal analyses that allow the investigation of the axial flux motor behavior in a detailed and exhaustive way. Full article
(This article belongs to the Special Issue Applications of Electrical Machines in Modern Electric Vehicles: Current Developments and Future Perspectives)
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13 pages, 5835 KiB  
Article
The Design of a Permanent Magnet In-Wheel Motor with Dual-Stator and Dual-Field-Excitation Used in Electric Vehicles
by Peng Gao, Yuxi Gu and Xiaoyuan Wang
Energies 2018, 11(2), 424; https://doi.org/10.3390/en11020424 - 12 Feb 2018
Cited by 23 | Viewed by 7577
Abstract
The in-wheel motor has received more attention owing to its simple structure, high transmission efficiency, flexible control, and easy integration design. It is difficult to achieve high performance with conventional motors due to their dimensions and structure. This paper presents a new dual-stator [...] Read more.
The in-wheel motor has received more attention owing to its simple structure, high transmission efficiency, flexible control, and easy integration design. It is difficult to achieve high performance with conventional motors due to their dimensions and structure. This paper presents a new dual-stator and dual-field-excitation permanent-magnet in-wheel motor (DDPMIM) that is based on the structure of the conventional in-wheel motor and the structure of both the radial and axial magnetic field motor. The finite element analysis (FEA) model of the DDPMIM is established and compared with that of the conventional in-wheel motor. The results show that the DDPMIM achieves a higher output torque at low speeds and that the flux-weakening control strategy is not needed in the full speed range. Full article
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8 pages, 359 KiB  
Article
Multifunctional Optimal Design of Axial-Flux Permanent Magnet Wheel Motors for Light Electric Vehicles
by Yee-Pien Yang and Chung-Han Lee
World Electr. Veh. J. 2012, 5(2), 533-540; https://doi.org/10.3390/wevj5020533 - 29 Jun 2012
Viewed by 1167
Abstract
This paper presents a systematic approach of optimal design for an axial-flux permanent magnet wheel motor to have high torque density for light electric vehicles. First, the winding type and the numbers of slots and poles are determined at the stage of preliminary [...] Read more.
This paper presents a systematic approach of optimal design for an axial-flux permanent magnet wheel motor to have high torque density for light electric vehicles. First, the winding type and the numbers of slots and poles are determined at the stage of preliminary design. A magnetic circuit model with an effective air-gap distribution is then established for sensitivity analysis and multifunctional optimization. Finally, the finite element analysis is performed for verifying and refining the motor with the best torque density to fulfill design specifications. The theory of maximum torque per ampere is also applied to estimate the torque and power versus speed curves of the resulting wheel motor before it is fabricated. Full article
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