Cogging torque minimization in double sided axial flux magnetic gear

Afsari, Seyed Ahmadreza; Heydari, Hossein; Dianati, Babak

doi:10.1109/pedstc.2015.7093252

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…Authors in [12] analyze a double-sided axial flux magnetic gear design aimed at improving torque density. The study focuses on minimizing cogging torque through the application of skewing methods for both permanent magnets (PMs) and ferromagnetic pole pieces.…”

Section: Rotor Adjustmentmentioning

confidence: 99%

“…• rotor tooth notching, dummy slot [9] • an integer gear ratio • unequal-space type pole pieces • unequal-width type pole pieces [10] • trapezoidal shape permanent magnets [11] • skewing for both permanent magnets (PMs) and ferromagnetic pole pieces [12] • using alternating magnet pole-arcs in facing rotors [13] • designing permanent magnet shapes • arc-shaped triangular magnets [15] • hybrid skew: using magnets with different shapes for N and S poles [16] • magnet grouping [17] • shifting or grouping magnets • magnet skewing • varying magnet arc [18] • dual-skew magnet technique [19] • rotor skewing • notching • pole displacement [20] • optimizing the permanent magnet shape • different rotor designs (flat trapezoidal, skewed, curved, curved skew) [21] Table 3. Cogging torque reduction techniques dealing with stator adjustment.…”

Section: Rotor Adjustment Referencementioning

confidence: 99%

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Cogging Torque Reduction Techniques in Axial Flux Permanent Magnet Machines: A Review

Pranjić,

Virtič

2024

Energies

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Axial flux permanent magnet machines have garnered significant attention in recent years due to their numerous advantages in various applications, including electric vehicles, wind turbines, and robotics. However, one of the critical challenges associated with these machines is the presence of cogging torque, which can hinder their efficiency and performance. This review article provides a comprehensive overview of the state-of-the-art techniques employed for cogging torque reduction in Axial Flux Permanent Magnet Machines. Different techniques are described, encompassing geometric optimization, magnet placement, and skewing methods. Firstly, the significance of Axial Flux Permanent Magnet Machines is described, as well as the issue of the cogging torque. In the methods section, a review of the strategies for the reduction of cogging torque is described from various articles, and finally, in the discussion section, a list of actions is presented for cogging torque reduction for different topologies. The novelty of the study is that it combines strategies for cogging torque reduction in a single article.

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Section: Rotor Adjustmentmentioning

confidence: 99%

Section: Rotor Adjustment Referencementioning

confidence: 99%

Cogging Torque Reduction Techniques in Axial Flux Permanent Magnet Machines: A Review

Pranjić,

Virtič

2024

Energies

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“…In addition to the radial-flux structure, the FMMG can be built in the axial-flux frames [65][66][67][68][69][70][71][72][73][74] as shown in Figure 11. The axial-flux FMMG is preferred particularly in applications requiring flat outside shapes and hermetic isolation between the input and output shafts [75].…”

Section: Direction Of Magnetic Fluxmentioning

confidence: 99%

A review on the field‐modulated magnetic gears: Development status, potential applications, and existent challenges

Yan,

Li,

Wang

et al. 2023

IET Electric Power Appl

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As a type of magnetic device being able to realize contact‐free power transmission together with sufficient volumetric torque density, the field‐modulated magnetic gear (FMMG) has become a promising alternative to the mechanical gear having rigid construction yet suffering lots of issues generated by the continuous teeth friction. The conventional magnetic gears (MGs) that behave as simple copies of their mechanical counterparts and can be roughly defined as origination of the FMMG are briefly introduced at first. Subsequently, the topology and material advancements proposed to improve operational performance of the FMMG are comprehensively summarised so as to clarify its current development status. Finally, potential applications of the FMMG due to its inherent advantages are compared against the existent challenges. The review aims to provide referable guidelines for researchers working at the field of high‐performance MGs.

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“…EASM motorlarda vuruntu momentini azaltmak için stator oluklarına ya da mıknatıslara eğim verilmesi (kaykı), mıknatıslara özel şekiller verilmesi ve kaydırılması, yardımcı olukların ya da dişlerin kullanılması, mıknatıs kutbunun optimizasyonu, kesirli sargıların kullanılması gibi birçok teknik uygulanmıştır [6][7][8].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Aynı Fiziksel ve Elektromanyetik Parametreler Altında EASMSM ve ORSMSM’un Vuruntu Torkuna göre Karşılaştırılması

Saygin¹

2018

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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ÖzEksenel akılı sabit mıknatıslı senkron motor (EASMSM) ve outrunner sabit mıknatıslı senkron motor (ORSMSM) sıklıkla kullanılan döner tip motor çeşitleridir. Elektrik motorları için vuruntu torkunun istenmeyen bir çıktıdır. Yüksek devirlerde çalışırken vuruntu torku eylemsizlik momenti sayesinde önemli bir problem olmamasına rağmen, düşük devirlerde vuruntu torku üstesinden gelinmesi gereken bir ciddi sorundur. Özellikle bir uydu üzerindeki güneş panellerinin hareketi için vuruntu torku en aza indirilmelidir. Vuruntu torku sürekli mıknatıslı senkron motorların tasarımında çok önemli bir unsur olduğundan dolayı, bu çalışmada sadece vuruntu torkuna odaklanılmıştır. Bu nedenle, tasarlanan iki motor vuruntu torkuna göre karşılaştırılmıştır. Böylece en az vuruntu torku istenen uygulamalar için ne tip motorun tercih edilmesi gerektiği gösterilmiştir. AbstractAxial flux permanent magnet motor (AFPMM) and outrunner permanent magnet motor (ORPMM) are generic rotating machines that are commonly used. Cogging torque is an undesired output for electrical motors. Although the cogging torque is not an important problem at high operational speed thanks to moment of inertia, it is a serious trouble that must be overcome at low operational speed. Especially, it must be minimized for movement of solar panels on a satellite. Due to the fact that the cogging torque is so important factor for design of permanent magnet synchronous motor, in this study it is only focused on the cogging torque. For that reason, two designed motors are compared according to cogging torque. Thus, it has been shown what type of motor should be preferred for minimum cogging torque desired applications.

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Cogging torque minimization in double sided axial flux magnetic gear

Cited by 8 publications

References 16 publications

Cogging Torque Reduction Techniques in Axial Flux Permanent Magnet Machines: A Review

Cogging Torque Reduction Techniques in Axial Flux Permanent Magnet Machines: A Review

A review on the field‐modulated magnetic gears: Development status, potential applications, and existent challenges

Aynı Fiziksel ve Elektromanyetik Parametreler Altında EASMSM ve ORSMSM’un Vuruntu Torkuna göre Karşılaştırılması

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