A Review on Magnetic Gears: Topologies, Computational Models, and Design Aspects

Wang, Yawei; Filippini, Mattia; Bianchi, Nicola; Alotto, Piergiorgio

doi:10.1109/tia.2019.2916765

Cited by 73 publications

(25 citation statements)

References 86 publications

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“…In addition, like in conventional electrical machines, there are several design tradeoffs involved. For example, [3] demonstrates a MG prototype with the highest torque density reported in literature so far [19], [20]. However, the rotor tip speed is limited by the segmented structure.…”

Section: Section I Introductionmentioning

confidence: 96%

High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials

Al-Qarni

Ei-Refaie

2019

2019 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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Two major challenges of existing high-performance magnetic gears are: (i) High content of rare-earth permanent magnets which results in high cost as well as price fluctuation; (ii) Conflict between mechanical and electromagnetic performances, especially in the design of highspeed rotor. A magnetic gear using a blend of magnet types, i.e NdFeB, or Dy-free NdFeB and ferrites, is proposed in this paper. The goal is to bring down the cost while retaining comparable torque-transducing performance to a baseline magnetic gear only using rare

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Section: Section I Introductionmentioning

confidence: 96%

High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials

Al-Qarni

Ei-Refaie

2019

2019 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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“…PM clutches are reliable devices, which can transmit torque in the hazardous environment [4][5][6]. Extensive implementation of PM clutches is based on their unique features.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Permanent Magnet Clutch with Ārtap Framework

Andriushchenko

Kaska

Kallaste

et al. 2021

Period. Polytech. Elec. Eng. Comp. Sci.

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So far, Permanent Magnet (PM) clutches have been broadly used as torque transmission devices. With the aim of effective utilization of materials and energy in the manufacturing of PM clutches, design optimization has been widely applied. Generally, PM clutches are optimized applying linear dimensions as optimization parameters. On the contrary, optimization of PM clutch shapes has not been done extensively. Therefore, this paper performs optimization of PM clutch shapes with the following objectives: maximum tangential attraction force and minimum volume of utilized materials. To form optimal shapes, the points on the clutch surface are chosen as optimization parameters. The optimization is carried out using Ārtap framework in connection with COMSOL software, where the 3D model of the clutch has been created. After the optimization, the tangential attraction force has increased by 13 % and the volume of the clutch has been reduced by 24 %. Although the obtained shapes appear to be highly intricate, it does not pose an obstacle for modern manufacturing techniques.

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“…The use of magnetic forces for the transmission of mechanical power instead of physical contact removes at least some of the unwanted features of mechanical gears. Magnetic gears (MGs) provide contactless transmission of torque, which allows reducing vibrations and noise as well as increasing the durability [5][6][7][8], which decreases maintenance cost. Another advantage of the MG is its natural protection against overload [9].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Investigation of a Two-Stage Magnetic Precession Gear

2021

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Gears are common and important components of many types of propulsion systems applied in mechanical engineering. The aim of this paper is to present the mechanical design and performance analysis of a novel two-stage magnetic precession gear (MPG). The main advantage of the proposed design is the ability to obtain higher transmission ratios than other currently known magnetic gear types. A detailed analysis of the performance of the MPG was carried out employing a developed numerical model of the magnetic field in the proposed gear. The MPG model is based on the finite element method (FEM) and allows determining the relations between the torque acting on the main components of the gear, load angles, and air-gap lengths. To validate the developed FEM model, the prototype of an MPG with a 1/144 gear ratio was built and tested. The experiments were also focused on determining the mechanical efficiency as well as the influence of rotational speed and lengths of air gaps on the maximum load torque. The tests indicated that the maximum efficiency of the studied MPG is about 30%, which is comparable to the efficiency of mechanical two-stage precession gears with face meshing.

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A Review on Magnetic Gears: Topologies, Computational Models, and Design Aspects

Cited by 73 publications

References 86 publications

High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials

High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials

Design Optimization of Permanent Magnet Clutch with Ārtap Framework

Simulation and Experimental Investigation of a Two-Stage Magnetic Precession Gear

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