In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

Bdewi, Mustafa Yaseen; Ali, Mohammed Moanes E.; Mohammed, Ahmed M.

doi:10.11591/ijece.v12i5.pp4820-4831

Cited by 5 publications

(5 citation statements)

References 23 publications

(29 reference statements)

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“…Additionally, examining the studies on outer-rotor PMSM from the literature reveals a predominant focus on surface-mounted structures [10][11][12][13]. When examining outer-rotor PMSM, it is observed that these motors effectively meet the demand for high torque at low speeds and are suitable for direct drive applications.…”

Section: Introduction (Gi̇ri̇ş)mentioning

confidence: 99%

Design and Performance Analysis of an Outer-Rotor PMaSynRM

Yenipınar,

Saygın,

Sönmez

et al. 2024

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Permanent magnet synchronous motors (PMSMs) are consciously used as traction motors in electric vehicles (EVs) and hybrid electric vehicles (HEVs). The rotor position (inner-rotor, outer-rotor) and topology of PMSMs significantly impact their torque profile, efficiency, and demagnetization characteristics. This article focuses on designing an outer-rotor permanent-magnet-assisted synchronous reluctance motor (PMaSynRM) under traction motor requirements and investigating its electromagnetic performance using the finite element method (FEM). This study's primary challenge is achieving optimal machine performance, considering high maximum torque and the risk of demagnetization at low levels. The design, derived from analytical calculations, was subjected to Finite Element Method (FEM) analyses. These analyses investigated motor performance in terms of efficiency, the ability to generate torque at different drive currents, and the risk of demagnetization. As a result of the study, the proposed PMaSynRM design was obtained that provides an adequate demagnetization performance even under 300% loading, has a maximum torque exceeding 35 Nm, and achieves an efficiency of 90% at rated conditions.

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Section: Introduction (Gi̇ri̇ş)mentioning

confidence: 99%

Design and Performance Analysis of an Outer-Rotor PMaSynRM

Yenipınar,

Saygın,

Sönmez

et al. 2024

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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“…Mustafa Yaseen Bdewi et al employed an optimization method to enhance the magnet span, slot width, and slot opening of an outrunner PMSM. This approach was undertaken with the objective of improving torque density performance and maintaining low torque ripple over a wide range of current densities [12]. Also, Muhammed Muhsin Coşdu et al used a multiobjective differential evolutionary optimization algorithm (MODE) on an external rotor PMSM hub motor for the "Efficiency Challenge" competition to determine its lightweight potential [13].…”

Section: Introduction 1research Background and Motivationmentioning

confidence: 99%

Numerical Analysis of Outer-Rotor Synchronous Motors for In-Wheel E-Bikes: Impact of Number of Windings, Slot, and Permanent Magnet Shapes

Han,

Jin,

Cho

et al. 2024

Applied Sciences

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This study investigates the design an electric motor propelling hubless wheel mounted on an electric bicycle (e-bike) by numerical analysis. The motor is part of an in-wheel system that uses a permanent magnet synchronous motor (PMSM) to drive the hubless wheel. This paper presents an optimized PMSM design and compares various torque-related parameters, such as cogging torque, cogging torque total harmonic distortion (THD), and ripple torque. The comparison is based on a motor design that examines the effect of different factors, including the number of windings, slot openings, permanent magnet span, and magnet thickness. The motor was modeled and analyzed with variations in the number of windings (21, 23, 25), slot openings (2.4 mm, 3.0 mm, 3.6 mm), permanent magnet span (23 mm, 25 mm, 27 mm), and permanent magnet thickness (3.5 mm, 4.0 mm, 4.5 mm). Our findings suggest that increasing the permanent magnet’s thickness leads to a higher magnetic flux density. Additionally, when the permanent magnet span exceeds 25 mm, there is a sharp increase in cogging torque THD. Based on these results, a slot opening of 3.0 mm and the use of 25 windings are considered suitable for a hubless e-bike.

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“…Electrical Vehicles [1], Robotics [2], Power generation [3] and other industries use Surface-Mounted Permanent Magnets Synchronous Motors (SPMSMs). This is thanks to their high power density, high efficiency, ease to manufacture and compact structure.…”

Section: Introductionmentioning

confidence: 99%

A Karush-Kuhn-Tucker approach to field-weakening for Surface-Mounted Permanent Magnets Synchronous Motors

Houmsi,

Argomedo,

Massioni

et al. 2023

2023 International Conference on Control, Automation and Diagnosis (ICCAD)

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This article presents a feedforward analytical solution of Field-Weakening (FW) for Surface-Mounted Permanent Magnets Synchronous Motor (SPMSM) using Karush-Kuhn-Tucker (KKT) optimality conditions. The generated current references take into consideration voltage and current constraints, load torque, and speed references. The formulated optimization problem helps ensure that the generated references stays within the feasible domain given by the constraints. Furthermore, the solution given by the KKT is implemented in real-time using a low cost rapid control prototyping microcontroller (ATSAME54P20A) without the use of look-up tables.Index Terms-Flux-weakening control, Karush-Kuhn-Tucker (KKT), surface-mounted permanent magnet synchronous motor (SPMSM), real-time control, rapid control prototyping.

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In-wheel, outer rotor, permanent magnet synchronous motor design with improved torque density for electric vehicle applications

Cited by 5 publications

References 23 publications

Design and Performance Analysis of an Outer-Rotor PMaSynRM

Design and Performance Analysis of an Outer-Rotor PMaSynRM

Numerical Analysis of Outer-Rotor Synchronous Motors for In-Wheel E-Bikes: Impact of Number of Windings, Slot, and Permanent Magnet Shapes

A Karush-Kuhn-Tucker approach to field-weakening for Surface-Mounted Permanent Magnets Synchronous Motors

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