Comparative analyis of Flux Reversal machine and Fractional slot concentrated winding PMSM

More, D. S.; Kalluru, H.; Fernandes, B. G.

doi:10.1109/iecon.2008.4758113

Cited by 8 publications

(18 citation statements)

References 8 publications

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“…The maximum value of flux density in the stator pole (B s ) occurs when rotor pole fully aligns with PM and its value is given by (8) where, K fringe is the ratio of flux linking the stator winding to air-gap flux, B r is remnant flux density of PM (Tesla), h PM is the permanent magnet thickness (meter), g is air-gap thickness (meter), and W sp is the width of stator pole (meter). The flux density in the middle of the stator pole along the periphery of the machine is determined using (8) and is shown in Fig. 10.…”

Section: B Analytical Methodsmentioning

confidence: 99%

“…However, FRM can have large number of poles with less stator slots. FRM has higher power density than fractional-slot concentrated-winding PMSM [8]. This low-speed machine can be directly connected to wind turbine eliminating the gear box, thus, reducing the maintenance as well as weight on the tower.…”

Section: Three-phase 6/14 Pole Frmmentioning

confidence: 99%

“…Fractional-slot concentrated-winding PMSM and FRM are suitable for low-speed applications [9], [10]. The comparative analysis of FRM and fractional slot concentrated winding PMSM is made in [8]. The FEM analysis shows that FRM has 1.5 times higher power density than fractional slot PMSM for same physical dimensions, magnet volume, and electrical loading.…”

Section: Three-phase 6/14 Pole Frmmentioning

confidence: 99%

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Analysis of Flux-Reversal Machine Based on Fictitious Electrical Gear

Fernandes

2010

IEEE Trans. Energy Convers.

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Section: B Analytical Methodsmentioning

confidence: 99%

Section: Three-phase 6/14 Pole Frmmentioning

confidence: 99%

Section: Three-phase 6/14 Pole Frmmentioning

confidence: 99%

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Analysis of Flux-Reversal Machine Based on Fictitious Electrical Gear

Fernandes

2010

IEEE Trans. Energy Convers.

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“…In recent years, the unaffordability of RE PM prices forced the electrical machine designers to focus on inexpensive NRE materials like ferrite PMs and these materials are more desirable for the industry [3]. The trending flux-reversal machine (FRM), which is a pre-dominantly PM type machine, has been reported in some studies for rare-earth PM excited wind energy applications [4,5] and direct-drive drive-trains [6,7]. A direct-driven wind turbine generator is important since it generates electricity through the wind turbine drivetrain by eliminating the gearbox.…”

Section: Parameter Hs Msmentioning

confidence: 99%

“…These techniques may be limited for the FRM as nothing serious has been reported for NRE variants. Besides, FRM requires less number of stator slots and a large number of rotor poles, which qualifies them for direct-driven wind energy generators [5,7].…”

Section: Parameter Hs Msmentioning

confidence: 99%

Design and Performance Assessment of a Small-Scale Ferrite-PM Flux Reversal Wind Generator

2020

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Currently, there is increasing research interest in harnessing wind energy for power generation by means of non-conventional electrical machines e.g., flux-reversal machines. The flux reversal machine is usually designed using scarce rare–earth permanent magnet material which may be unattractive in terms of machine cost. In this study, an attempt is made to re-design the flux reversal machine with non-rare-earth ferrite permanent magnet for wind energy applications. Because these machines possess high cogging torque, which results in vibration and noise, that are detrimental to the machine performance, especially at low speeds, a novel combined skewed and circumferential rotor pole pairing method is developed. The proposed cogging torque reduction method is implemented in 2-dimensional finite element analysis modeling and comparatively analyzed with other existing stand-alone methods viz., skewing, and rotor pole pairing. The results show that the proposed method led to 94.8% and 71% reduction in the cogging torque and torque ripple compared to the reference generator, respectively. However, the calculated torque density is reduced by 13%. Overall, the electromagnetic performance of the proposed ferrite PM machine exhibits desirable qualities as an alternative design for the direct drive wind generator.

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Modelling and performance of three‐phase 6/14 pole flux reversal machine

More¹,

Fernandes

2013

IET Electric Power Applications

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A three-phase flux reversal machine (FRM) is modelled using the d-q theory. A fictitious 'electrical gear' concept is used to simplify modelling and analysis of this machine. The d-q equivalent circuits are proposed based on this gear ratio. A power density of the machine is improved with full pitch winding. The torque obtained with full pitch winding is twice that of concentrated stator pole winding for same input current. FRM with full pitch winding (FPFRM) is compared with the conventional concentrated stator pole winding FRM (CSPFRM). The results obtained using the proposed d-q circuits are compared with those obtained from FEM analysis. A steady-state performance of FPFRM and CSPFRM is evaluated with proposed d-q circuits. To validate the modelling based on d-q equivalent circuits, a 6/14 pole FRM is fabricated with the conventional concentrated stator pole winding and full pitch winding for wind power application. The analytical results are compared with finite element method (FEM) analysis results and experimental results.

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Comparative analyis of Flux Reversal machine and Fractional slot concentrated winding PMSM

Cited by 8 publications

References 8 publications

Analysis of Flux-Reversal Machine Based on Fictitious Electrical Gear

Analysis of Flux-Reversal Machine Based on Fictitious Electrical Gear

Design and Performance Assessment of a Small-Scale Ferrite-PM Flux Reversal Wind Generator

Modelling and performance of three‐phase 6/14 pole flux reversal machine

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