Principles of the Trans-Rotary Magnetic Gear

Pakdelian, Siavash; Frank, Nicolas; Toliyat, H.A.

doi:10.1109/tmag.2012.2215046

Cited by 79 publications

(16 citation statements)

References 12 publications

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“…It is shown in [15] that in an ideal TROMAG as long as the rotor and translator are moving in synchronism, which is the case in steady-state operation, the relative position of rotor magnets and translator magnets remains constant. Therefore, the losses in magnets and iron cores are expected to be insignificant.…”

Section: B Design Constraints Constants and Variables Of A Mitromagmentioning

confidence: 99%

“…The magnetic device that performs the conversion of highforce, low-speed linear motion to low-torque, high-speed rotation is referred to as the trans-rotary magnetic gear (TROMAG) [15]. Different views of a TROMAG are depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The same terms will be used for the linear tubular machine (LTM) in which either the stator or the translator has to be longer than the other part. Moreover, the maximum axial force a TROMAG can develop, which depends on the dimensions and materials used, is called pull-out force in analogy with synchronous machines [15]. The pull-out force per active air gap area, the area that is enclosed between the rotor and translator, is referred to as the shear stress of a TROMAG.…”

Section: Introductionmentioning

confidence: 99%

“…Principles of operation of the TROMAG [15] and its magnetic design [16]- [18] have been presented in earlier publications. This paper aims to show that for high-force, low-speed load characteristic, the proposed approach; that is, integrating a TROMAG and a rotary machine, which hereafter is referred to as MITROMAG for the ease of reference, can significantly save on weight and cost of the required material (ferromagnetic iron, copper, and magnet) compared to a direct drive linear PM machine that is designed for the same force and speed.…”

Section: Introductionmentioning

confidence: 99%

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Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Pakdelian¹,

Deshpande²,

Toliyat³

2015

IEEE Trans. Energy Convers.

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Design aspects of the trans-rotary magnetic gear (TROMAG) integrated rotary machine are discussed in this paper, with particular focus on optimizing system cost and weight. Analytical models are used for design of the TROMAG. Optimal designs of the rotary machine are found by using a populationbased genetic algorithm and two-dimensional finite-element analysis and thermal considerations. Weight, volume, and cost of the resultant system are then compared with the Pareto-optimal set of a permanent magnet linear tubular machine that is designed for the same force and speed specification. It is shown in this paper that, for high-force low-speed reciprocating motion applications, an electromechanical motion system consisting of a TROMAG and a rotary electric machine can far surpass a conventional direct drive linear machine in terms of weight, volume, and initial and operating cost.Index Terms-Finite-element analysis (FEA), linear permanent magnet (PM) machines, magnetic gear, trans-rotary magnetic gear.

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Section: B Design Constraints Constants and Variables Of A Mitromagmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Pakdelian¹,

Deshpande²,

Toliyat³

2015

IEEE Trans. Energy Convers.

Self Cite

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“…MGs can easily replace mechanical gears while offering significant advantages of reduced acoustic noise, minimum vibration, maintenance free, better reliability, inherent overload protection, and physical isolation between the input and output shafts [1][2][3]. Compared to mechanical gears, there are no friction losses, heat losses, unwanted noise or vibration [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Axial Magnetic Gears Based on Magnetic Composition Topology Differences

et al. 2018

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This paper proposes a design and implementation of an axial type magnetic gear (MG) based on the composition of the magnetic arrangement. We report a quantitative comparison of two MG topologies with rectangular magnets arranged in series and parallel. Increased magnetic flux is done through magnetic circuit analysis and electrical circuit approach. Testing is done by using the rotation of a DC motor drive from 300-2600 rpm with a DC generator under load conditions. Measurement of load current and generator output power for both axial MG topologies are taken and analyzed. The results showed that the performance of an axial MG with the rectangular magnetic arrangement in parallel is better than that of a series arrangement. Based on the measured loading current of the two axial MG topologies, at generator rotation between 300-1300 rpm with 100, 200, and 300 Ω resistance loads show the same load current. Conversely, after a DC generator rotation approaches 1 2 of the maximum rotation (1300-2600 rpm) there is a significant increase in load current fluctuations. That is, with an increase of load currents occurring, the parallel magnetic topology shows an increase in load torque due to an increase of magnetic flux in the gear train magnets of the MG.

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Structural Simplicity and Performance Comparison of Magnetic Lead Screws without Spiral Permanent Magnets

Heya

Nakata

Ishiguro

et al. 2021

IEEJ Transactions Elec Engng

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Feed screws are used in various industrial machines and robots to convert rotational motions into linear motions. Mechanical screws, such as ball screws and slide screws, transmit force via frictional contacts through which noise and heat are being generated; thus, the drive efficiency is decreased. To address these problems, we have proposed some types of magnetic lead screws (MLSs) without spiral permanent magnets. The design has no spiral permanent magnets and comprises relatively few components. However, the differences in the thrust density and productivity due to the structural differences have not been reported. This paper investigates and discusses the performance and productivity of the MLSs without spiral permanent magnets based on a magnetic field analysis using a three‐dimensional finite element method. The MLSs are designed under the same size and basic design parameters. The analysis results of the thrust and torque characteristics of the MLSs are shown and compared, and their productivity is evaluated by the number of components. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Principles of the Trans-Rotary Magnetic Gear

Cited by 79 publications

References 12 publications

Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Design of an Electric Machine Integrated with Trans-Rotary Magnetic Gear

Comparison of Axial Magnetic Gears Based on Magnetic Composition Topology Differences

Structural Simplicity and Performance Comparison of Magnetic Lead Screws without Spiral Permanent Magnets

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