On the Role of Magnetic Shunts for Increasing Performance of Transverse Flux Machines

Dobzhanskyi, Oleksandr; Gouws, Rupert; Amiri, Ebrahim

doi:10.1109/tmag.2016.2621047

Cited by 30 publications

(22 citation statements)

References 11 publications

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“…The magnetic shunts are used to block inactive magnet fluxes and to reduce the cogging torque in the TFM (as seen Figure 9a). For example, the use of the magnetic shunts in the three-phase TFM resulted in a 1/2 reduction in the cogging torque [41]. On the other hand, this method increases the active weight of the machine.…”

Section: Use Of Magnetic Shuntmentioning

confidence: 99%

“…When the stator cores are aligned with the magnets, the other pair of magnets cannot be actively used, and also they have the weakening effects on the phase flux-linkage. The I cores called "bridge" or "magnetic shunt" are used to reduce the negative effect of unused magnet fluxes [4,41]. For example in [41], when the magnetic shunts were added to the TFM model, the power factor increased from 0.5 to 0.8.…”

Section: Power Factor Of Tfmsmentioning

confidence: 99%

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Comparative review of disk type and unconventional transverse flux machines: performance analysis

Tuncel¹,

Yıldırız²

2021

Turk J Elec Eng & Comp Sci

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Transverse flux machines (TFM) can be designed with high pole numbers, so they are very useful in directdrive systems with high torque density. Although many TFM models have been proposed to date, no detailed classification and comparison has been made before. Conventional TFMs have a high power and torque density, but low power factors and high cogging torques have prevented them from being widely used. However, especially with the new disk type TFMs proposed in recent years and the methods developed, these drawbacks have been reduced. In this paper, the TFMs proposed in recent years have been classified and their performances in terms of power factor, cogging torque, torque density, and efficiency have been examined. According to the results of this review, the performances of the new generation TFMs are competitive. Especially double-sided disk type TFMs are seen as an important topology with their high magnet utilization and flexibility in design.

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Section: Use Of Magnetic Shuntmentioning

confidence: 99%

Section: Power Factor Of Tfmsmentioning

confidence: 99%

Comparative review of disk type and unconventional transverse flux machines: performance analysis

Tuncel¹,

Yıldırız²

2021

Turk J Elec Eng & Comp Sci

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“…In addition, the machine housing can also be made of aluminum, which may bring eddycurrent issue [24]. Another challenge for manufacturing is high torque ripple and induced vibration issue, the magnetic shunts are reported to minimize this problem [25], but the cost and power-to-weight ratio would be decreased.…”

Section: E Comparison With Transverse-flux Machinesmentioning

confidence: 99%

Novel Dual-Stator Machines With Biased Permanent Magnet Excitation

Yang

Lyu

Lin

et al. 2018

IEEE Trans. Energy Convers.

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This paper proposes high-torque-density dual stator permanent magnet machines with biased permanent magnet (PM) excitation in the inner stator. The developed machine can be geometrically considered as an outer-rotor stator PM machine plus a separate outer stator similar to the conventional fractionalslot machines. Consequently, the proposed designs feature two different stator structures. Meanwhile, two sets of armature windings are employed to improve the space utilization ratio and torque density. The machine topologies and operating principles are first described. In addition, the analytical models of the machine are introduced, which are utilized to optimize the stator/rotor pole combination as well as the power splitting ratio between two stators. This design optimization is performed in order to maximize the torque capability with the constraint of copper loss. The electromagnetic characteristics of the proposed machine with different inner stator structures are evaluated and compared by the finite-element (FE) method. Finally, an optimized DS-BPMM prototype is manufactured and tested to verify the FE analyses.

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“…In other words, the plane of the magnetic flux path of a transverse flux machine is perpendicular to the moving direction [11]. Since the overall winding can link the Permanent Magnet (PM) fluxes from all the magnetic poles of the machine, TFPMM can reach higher torque when compared with the radial flux and axial flux machines [2][3][4]12,13]. Another advantage of the TFPMM is that the electrical and magnetic circuits of the machine are excellently decoupled [9].…”

Section: Introductionmentioning

confidence: 99%

“…The topologies of TFPMMs differ by structure, but the principles of their performance are the same [13,25].…”

Section: Introductionmentioning

confidence: 99%

Design, Analysis and Fabrication of a Novel Transverse Flux Permanent Magnet Machine with Disk Rotor

Azarinfar

Aghaebrahimi

2017

Applied Sciences

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Abstract:The purpose of this paper is to propose a novel design for the transverse flux permanent magnet (TFPM) disk-rotor generator with E and I-shaped cores (TFPMDEIG). Disk-shape structure increases the machine's power factor, allows for high rotational speeds, decreases centrifugal force over permanent magnets, and is employed in wind turbines, due to its compact structures. As for other advantages for this structure, one can point to the fact that there are as many windings as machine's pole pairs; these windings become parallel by observing the polarity. In other words, the total power of this machine is distributed between pole pairs, increasing the overall reliability of the machine. In this paper, first, the initial design algorithm and the basic formulas governing the behavior of the proposed structure using the equivalent magnetic circuit for each pole are provided, and the three-dimensional finite element method (3D-FEM) is used for verification of the algorithm. To validate the simulation results (3D-FEM), then, a prototype has been fabricated and experienced. The experimental results are in good agreement with simulation results.

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On the Role of Magnetic Shunts for Increasing Performance of Transverse Flux Machines

Cited by 30 publications

References 11 publications

Comparative review of disk type and unconventional transverse flux machines: performance analysis

Comparative review of disk type and unconventional transverse flux machines: performance analysis

Novel Dual-Stator Machines With Biased Permanent Magnet Excitation

Design, Analysis and Fabrication of a Novel Transverse Flux Permanent Magnet Machine with Disk Rotor

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