Analytical calculation of air-gap magnetic field distribution in transverse-flux machines

Anglada, Jaime Renedo; Sharkh, Suleiman M.

doi:10.1109/isie.2016.7744880

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…The model is capable of adapting any geometry with a 5% error and 25 times improvement in computational time. Furthermore, the MEC of TFPM machine is developed through a complex permeance method for minimization of calculation time is presented in [155].…”

Section: B Magnetic Equivalent Circiutmentioning

confidence: 99%

A Review on Transverse Flux Permanent Magnet Machines for Wind Power Applications

et al. 2020

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Transverse flux permanent magnet (TFPM) machines are a potential candidate for directdrive wind power application due to high torque and power densities. The operating principle of TFPM machines is firstly described with various topologies available in literature, with the placement of magnets as a criterion for the classification of TFPM machine topologies. This review includes characteristics, power factor improvement, cogging torque minimization, material consideration, modelling techniques, and scalability. Different wind turbine concepts with direct-drive machines, control techniques and power converter topologies are also considered in this paper. INDEX Permanent magnet, topologies, transverse flux, and wind power.

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Section: B Magnetic Equivalent Circiutmentioning

confidence: 99%

A Review on Transverse Flux Permanent Magnet Machines for Wind Power Applications

et al. 2020

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“…Using the complex permeance function defined in [40], the magnetic field distribution in the air-gap produced by the stator can be expressed in polar coordinates (θ is the electrical angle in radians) as…”

Section: A Calculation Of the Virtual Mutual Inductancementioning

confidence: 99%

Analysis of Transverse Flux Machines Using a Virtual Mutual Inductance Approach

Anglada

Sharkh

2018

IEEE Trans. Energy Convers.

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Abstract-In this paper a virtual mutual inductance approach is used to analyse the performance of transverse flux machines (TFMs). The virtual mutual inductance between the stator windings and the magnets' equivalent currents is obtained by integrating the flux produced by the stator windings over the surface of the magnets. Key design parameters such as back EMF, torque, phase inductance and power factor are readily calculated using the proposed methodology. This method is also used to optimise the geometry of a particular machine which provides an insight into the relationship between power factor and torque. Furthermore, the insights gained suggest a design approach that takes into account the power factor of TFMs, which may help unlock their potential through a trade-off between torque density and power factor. The results obtained using the analytical model are verified using 3D finite element analysis (FEA) and experimental data.

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“…In this paper, the magnetic field distribution in the air-gap is calculated using the CP method [24][25][26]. The calculation of the CP function for TFMs is shown in [28] and the same notation is used in this paper.…”

Section: Analytical Calculation Of the Magnetic Field In The Air-gapmentioning

confidence: 99%

“…By evaluating l SC (u, r), we can calculate the coefficients that determine the CP function (11) as shown in [28]. 4 Torque equation Fig.…”

Section: Analytical Calculation Of the Magnetic Field In The Air-gapmentioning

confidence: 99%

“…This together with the neglect of the effect of curvature can introduce significant errors when calculating K B and torque for machines with relatively large gap to diameter ratios. This paper uses a complex permeance (CP) method [24][25][26][27] adapted for the calculation of a homopolar field distribution in a TFM and taking into account multiple slot interaction and curvature [28]. The method uses the Schwarz-Christoffel (SC) transformation to obtain an expression for the flux factor K B .…”

Section: Introductionmentioning

confidence: 99%

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Analytical calculation of the torque produced by transverse flux machines

Anglada

Sharkh

2017

IET Electric Power Applications

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An analytical technique for the calculation of torque produced by a transverse flux machine is developed in this paper. In this technique, the magnets are replaced by their equivalent current sheets and the torque is calculated using the Lorentz force equation. The flux density distribution is calculated using a conformal mapping method that takes into account curvature and slotting. The result is a relatively simple equation that relates torque to the electric and magnetic loadings of the machine and a flux factor that depends on key machine geometrical parameters. The results of the analytical model are verified using finite element analysis and experimental data.

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Analytical calculation of air-gap magnetic field distribution in transverse-flux machines

Cited by 10 publications

References 12 publications

A Review on Transverse Flux Permanent Magnet Machines for Wind Power Applications

A Review on Transverse Flux Permanent Magnet Machines for Wind Power Applications

Analysis of Transverse Flux Machines Using a Virtual Mutual Inductance Approach

Analytical calculation of the torque produced by transverse flux machines

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