A Review of Transverse Flux Machines Topologies and Design

Ballestín-Bernad, Víctor; Sevil, Jesús Sergio Artal; Domínguez-Navarro, José A.

doi:10.3390/en14217173

Cited by 9 publications

(8 citation statements)

References 133 publications

(588 reference statements)

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“…However, in TFMs there is a unique, concentrated coil per phase that links the flux of all the poles at the same time. In all cases, if the gap diameter is kept constant and the pole pairs are duplicated, the pole section is halved (1). As RFMs and AFMs are generally formed by the series connection of the coils, the number of turns per phase has to be duplicated in order to keep constant the no-load flux linkage (2) and so the back-EMF and torque.…”

Section: Sizing Equations For Transverse and Radial Flux Machinesmentioning

confidence: 99%

“…Note: Some of the torque densities have been calculated from data in references. (1) Active power density 135.5 W/kg, speed 1500 rpm (2) Torque 7 Nm, active mass 2.89 kg (3) Torque 222.38 Nm, active mass 22.7 kg…”

Section: Back-emf and Base Torque Dynamic Simulationsmentioning

confidence: 99%

“…T RANSVERSE flux machines (TFMs) have the potential to offer high torque density in direct-drive applications such as electric vehicles, wind power and fault-tolerant aircraft generators [1]. TFMs benefit from magnetic and electrical loadings being decoupled, resulting in high torque density [2].…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Analytical Sizing Methodology for Transverse and Radial Flux Machines

Ballestín-Bernad,

Egea-Cáceres,

Artal-Sevil

et al. 2023

IEEE Access

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Transverse flux machines have the potential to offer high torque density in direct-drive vehicle traction applications. Besides, sizing equations are a wide-spread technique for transverse flux machines design, as their computational cost is much lower than the finite element method. In this paper a novel analytical sizing methodology for transverse and radial flux machines is presented, focusing on the current load and the pole length factor as the main design parameters. The motor specifications are intended for a light-duty electric vehicle application. As transverse flux machines have a single, hoop-shaped coil per phase that embraces the flux of all the pole pairs, their principle of operation and therefore their sizing equations differ from radial flux machines. The proposed analytical method allows to compare transverse and radial flux machines easily through a similarity analysis and a parametric study. Furthermore, the discrepancies between the analytical model and the finite element method are quantified and then included in previous equations. Then the analytical model is optimized with a multiobjective genetic algorithm in the final stage. According to the sizing methodology presented here, transverse flux machines have a superior performance than radial flux machines in terms of torque density and efficiency.

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Section: Sizing Equations For Transverse and Radial Flux Machinesmentioning

confidence: 99%

Section: Back-emf and Base Torque Dynamic Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

A Comprehensive Analytical Sizing Methodology for Transverse and Radial Flux Machines

Ballestín-Bernad,

Egea-Cáceres,

Artal-Sevil

et al. 2023

IEEE Access

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“…Eng. field, increasing the winding cross-section occurs at the expense of the magnetic circuit's surface area, and vice versa [8]. The absence of end connections in the TFM windings significantly reduces the axial dimension of the machine.…”

Section: Introductionmentioning

confidence: 99%

From transverse flux machine to fractional slot concentrated winding permanent magnet synchronous machine

Lerch

2024

Archives of Electrical Engineering

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The article presents the results of research on transverse flux machine (TFM) modifications that led to the development of the cogging machine (PMCM) concept and its further evolutions. The transformation process of the cogging machine from a multi-segment to a single-segment modular design has resulted in a structure identical to the known and commonly used fractional slot concentrated winding permanent magnet synchronous machine (FSCW-PMSM). The paper describes the features gained and lost by the modified machine in various transformation stages. An original method for selecting the number of winding modules is also proposed, depending on the number of coils in a module and the pitch of the pole using a separating tooth between the modules.

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“…The stator cores can take various shapes C-core, U-core, H-core, Quasi-U-core and E-core [148][149][150]. The iron bridges, placed between the stator cores, are used to reduce the fluxes generated by the unused permanent magnets.…”

mentioning

confidence: 99%

Electrical Generators for Large Wind Turbine: Trends and Challenges

2022

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This paper presents an overview of the emerging trends in the development of electrical generators for large wind turbines. To describe the developments in the design of electrical generators, it is necessary to look at the conversion system as a whole, and then, the structural and mechanical performances of the drive train need to be considered. Many drive train configurations have been proposed for large wind turbines; they should ensure high reliability, long availability and reduced maintainability. Although most installed wind turbines are geared, directly driven wind turbines with permanent magnet generators have attracted growing interest in the last few years, which has been in parallel to the continuous increase of the per unit turbine power. The aim of this work is to present the recent commercial designs of electrical generators in large wind turbines. Both the strengths and weaknesses of the existing systems are discussed. The most emerging technologies in high-power, low-speed electrical generators are investigated. Furthermore, a comparative analysis of different electrical generator concepts is performed, and the generators are assessed upon a list of criteria such as the mass, cost, and mass-to-torque ratio. Within the framework of these criteria, it may help to determine whether the electrical generator is technically feasible and economically viable for high-power wind turbines. Finally, this review could help to determine suitable generators for use in large and ultra-large wind energy systems.

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A Review of Transverse Flux Machines Topologies and Design

Cited by 9 publications

References 133 publications

A Comprehensive Analytical Sizing Methodology for Transverse and Radial Flux Machines

A Comprehensive Analytical Sizing Methodology for Transverse and Radial Flux Machines

From transverse flux machine to fractional slot concentrated winding permanent magnet synchronous machine

Electrical Generators for Large Wind Turbine: Trends and Challenges

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