Comparative Analysis of Electromagnetic Performance of Magnetic Gear

Huang, Xiaocun; Guo, Yunfei; Jing, and Libing

doi:10.2528/pierl21031501

Cited by 2 publications

(4 citation statements)

References 18 publications

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“…The authors in [15] examined the effect of three strategies for reducing cogging torque: PM segmentation method, PM shifting method, and composite material PMs method. In [16], the authors investigated the influence of various magnetization modes on the performance of the MG. In [17], several techniques for decreasing cogging torque for specific applications were investigated, such as PM segmentation, adding unique slots, and inlaying two-part rotors.…”

Section: Introductionmentioning

confidence: 99%

Elimination of Cogging Torque and Torque Ripple in Magnetic Gear Using Slicing Technique

Rashid¹,

Mohammed²

2022

PIER C

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Magnetic gears (MGs) have many advantages over mechanical gears, including high efficiency, no contact, no lubrication, and low noise. Even though MGs are energy-efficient, cogging torque and torque ripple are always challenging, especially in low-speed applications. Generally, the cancellation of cogging torque enhances the performance of the operation of PM machines. This article proposes an approach based on slicing technique through which reduced cogging torque and improved torque density can be achieved in MGs. The two-dimensional finite element method (2D FEM) has been used to analyze the models using Simcenter and MATLAB software packages. The results show that the elimination of cogging torque of the proposed models compared to the base model is 97.53% on the inner rotor, and that of the outer rotor is 42.23%. Also, the torque density is slightly improved by 0.05% on the inner rotor while 0.1% improvement on the outer rotor is obtained.

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Section: Introductionmentioning

confidence: 99%

Elimination of Cogging Torque and Torque Ripple in Magnetic Gear Using Slicing Technique

Rashid¹,

Mohammed²

2022

PIER C

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“…Magnetic gear technology, including those pertaining to concentric magnetic gears, has been well described in the existing literature in reasonable depth by various researchers and documented in the literature [1][2][3][4][5][6][7][8][9][10][11]. The technology enables physical contactless movement of two mechanical elements, i.e., rotors, and the torque is transmitted through the interaction between magnetic fields, which are normally permanent magnets.…”

Section: Introductionmentioning

confidence: 99%

“…The white blocks could be air gap or some non-magnetic or low permeability material which can allow a mechanically robust structure for the purpose of physical fabrication. The physical details of the magnetic gear can be found in the literature [1][2][3][4][5][6][7][8][9][10][11][12]. While the inner and outer rotors are movable, in general the modulator structure can remain stationary, but it may be allowed to move in certain special situations.…”

Section: Introductionmentioning

confidence: 99%

“…where P o , P i , and N m are the number of pole pairs of the inner rotor, and number of pole (ferromagnetic material pieces) pieces of the modulating structure [1][2][3][4][5][6][7][8][9][10][11][12]. It has also been shown [1,8] that the transmission of rotation can happen when there is a specific gear ratio (i.e., speed ratio) G between the inner and outer rotating members, and the relation shown in Equation ( 2) is satisfied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Concentric Magnetic Gear without Separate Modulator Structure - A Theoretical Study Based on Harmonics Interaction

Masrur¹

2022

PIER M

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This paper theoretically describes a new concept of passive contactless concentric magnetic gear, which, unlike the existing ones, does not use any separate modulator structure, and instead, a set of strength modulated permanent magnet pole pieces are introduced on the outer permanent magnet rotor structure. Mathematical analysis shows that stable operation in this proposed system is possible with any specific gear ratio, dependent on the number of pole pieces and on the choice of modulation constant of the pole strength variation. The system described is simpler because of the absence of separate modulator structure. The concept is new, leads to less parts count, and hence deserves consideration due to its simplicity. A simple simulation study result is also included at the end, which confirms the presented theory. The main contribution of the paper is the introduction of a new concept for designing magnetic gears using fewer physical components and showing that it is a viable design and able to produce a tangible toque at a particular gear ratio. In addition, the mathematical theory in the paper leads to interesting new results indicated in the design section of the paper, which have not been seen in the literature known to the author.

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Comparative Analysis of Electromagnetic Performance of Magnetic Gear

Cited by 2 publications

References 18 publications

Elimination of Cogging Torque and Torque Ripple in Magnetic Gear Using Slicing Technique

Elimination of Cogging Torque and Torque Ripple in Magnetic Gear Using Slicing Technique

Concentric Magnetic Gear without Separate Modulator Structure - A Theoretical Study Based on Harmonics Interaction

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