Magnetic Gearing Electromagnetic Concepts

Neves, Carlos Guilherme Da Costa; Filho, Aly Ferreira Flores

doi:10.1590/2179-10742017v16i1874

Cited by 9 publications

(11 citation statements)

References 8 publications

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“…The magnetic flux modulation principle can be explained as shown in [14]. In order to explain the magnetic flux modulation, an outer rotor with a given number of poles, all radially magnetized with alternating polarities, can be considered as the primary source of magnetic field.…”

Section: Magnetic Gearboxesmentioning

confidence: 99%

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Study of a reluctance magnetic gearbox for energy storage system application

Dias¹

2022

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This work proposes the use of a magnetic gearbox to be applied on an energy storage system based on flywheel to allow the use of a conventional electric machine external to the vacuum chamber as the primary machine, maintaining the possibility of using a rotating mass with high speeds. Parametric simulations were performed using finite element software to determine the behaviour of the various variables of the magnetic gear in terms of its performance and design constraints. Finally, a prototype was built to validate the simulations and the considerations made.

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Section: Magnetic Gearboxesmentioning

confidence: 99%

“…Considering these three main parts, the magnetic flux modulation can be explained as follows. Source: [14] In Fig. 2, it can be seen that the modulation ring pieces are aligned with the north poles of the outer rotor, and, consequently, the modulated magnetic flux seen by the inner rotor is a north pole.…”

Section: Magnetic Gearboxesmentioning

confidence: 99%

Study of a reluctance magnetic gearbox for energy storage system application

Dias¹

2022

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“…Figure 1 shows the structure of CMG [12]. The permanent magnet (PM) is mounted on the inner yoke which act as input rotor.…”

Section: Working Principle Of Concentric Magnetic Gearmentioning

confidence: 99%

Preliminary Study on Yoke Sizing of Concentric Magnetic Gear

Halim¹

2020

IJETER

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In this paper, torque, torque density, efficiency and efficiency slope of concentric magnetic gear (CMG) at different yoke sizes are evaluated using 2D finite element. Transient analysis when eddy current loss included and excluded are simulated. Efficiency to speed o used in this study is similar to the original gear ratio, 5.5. The change in the yoke size also effect the torque density of the CMG. The finding showed that the change in size at the outer rotor yoke influence the torque and efficiency the most. The smallest outer rotor yoke yields higher torque density of 55% then the average value in this study and slower gear efficiency degradation.

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“…In this regard, K. Atallah, C.G.C. Neves, and N. Misron presented the principle of modulated air-gap flux through magnetic gear, and H. Zhao and M. Cheng studied MG-PMSM for traction of electric vehicles [6][7][8][9][10]. Figure 3 shows the change from the conventional driving system to MG-PMSM.…”

Section: Introductionmentioning

confidence: 99%

A Study on MG-PMSM for High Torque Density of 45 kW–Class Tram Driving System

Lee

et al. 2022

Energies

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This paper reports the design of a magnetic-geared permanent magnet synchronous motor (MG-PMSM) for a 45 kW tram traction system based on high torque density. In the case of the existing tram driving system, due to mechanical reduction gear and induction motor, it causes power transmission loss, low efficiency, and difficulty in lightweight. To solve this problem, research on the MG-PMSM, which combines a contactless magnetic gear with a high-power-density PMSM, is being actively conducted. This motor has a double rotor structure, and the inner rotor, including permanent magnet, and the outer rotor composed of pole-pieces rotate at different mechanical speeds. However, it is hard to design a tram driving system with a high torque density within limited conditions, because only one rotor in MG-PMSM is used as an output. In addition, there is no study conducted from basic design to final design, including gear ratio and topology selection in MG-PMSM for tram. Therefore, this paper presents the design process of MG-PMSM with high torque density to be applied to the 45 kW–class tram driving system. After designing the magnetic gear part that increases torque and efficiency by selecting an appropriate topologies-and-gear ratio that meets the constraints, the final finite elements method (FEM) model and electromagnetic field analysis results were derived by considering the number of poles and the number of slots. Through this, we confirmed that it is superior in output characteristics compared to the existing induction motor + mechanical gear.

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Magnetic Gearing Electromagnetic Concepts

Cited by 9 publications

References 8 publications

Study of a reluctance magnetic gearbox for energy storage system application

Study of a reluctance magnetic gearbox for energy storage system application

Preliminary Study on Yoke Sizing of Concentric Magnetic Gear

A Study on MG-PMSM for High Torque Density of 45 kW–Class Tram Driving System

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