An analytical, numerical and experimental study on performance characteristics in a novel Vernier permanent magnet machine

Jabbari, Ali; Taheri, Hosein; Ghadimi, Ali

doi:10.1007/s00202-020-01035-1

Cited by 4 publications

(6 citation statements)

References 34 publications

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“…Recent developments in wind energies have also heightened the need for more investigation on direct‐coupled wind turbines (DCWTs) due to the elimination of gearbox 3,4 . DCWTs provide many advantages in terms of reliability, maintenance cost, and efficiency in comparison with geared types 5,6 . Nevertheless, owing to the lower speed of DCWTs, the generator of such types of turbines must be designed with a high torque density value to decrease the generator volume and weight 7 .…”

Section: Introductionmentioning

confidence: 99%

“…3,4 DCWTs provide many advantages in terms of reliability, maintenance cost, and efficiency in comparison with geared types. 5,6 Nevertheless, owing to the lower speed of DCWTs, the generator of such types of turbines must be designed with a high torque density value to decrease the generator volume and weight. 7 In this respect, permanent-magnet machines are highly interesting for wind turbine applications.…”

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confidence: 99%

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Optimal design of a modular axial‐flux permanent‐magnet synchronous generator for gearless wind turbine applications

Ashrafzadeh,

Ghadimi,

Jabbari

et al. 2023

Wind Energy

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Air‐cored axial‐flux permanent‐magnet synchronous generators (AFPMSGs) are potential candidates for gearless direct‐coupled wind turbines (DCWTs) owing to providing high efficiency and power density. The design of a DCWT generator is so complicated since the generator cost, dimension, and weight affected by gear elimination. Therefore, it is essential to find an optimal AFPMSG design at rated conditions. In this paper, an accurate procedure for the optimal design of an air‐cored AFPMSG applicable for DCWTs is proposed. The genetic algorithm (GA) is used for multi‐objective design optimization to reach the optimal configuration as well as system dimension in order to decrease the weight, increase the power density and enhance the effectiveness of the generator. To validate the efficiency of the suggested optimization proceducer, a 30 kW AFPMSG has been considered as a case study. The results of optimization have been investigated by finite element analysis (FEA). A prototype generator is also fabricated, and the test results are offered and compared with the numerical study. The outcomes show that there exists an acceptable agreement between FEA and experimental outcomes with the error percentage about of 1.35%.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Optimal design of a modular axial‐flux permanent‐magnet synchronous generator for gearless wind turbine applications

Ashrafzadeh,

Ghadimi,

Jabbari

et al. 2023

Wind Energy

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“…A review of past researches has shown that many researchers have worked in the field of electromagnetic modeling of electric machines. In a general classification of electric machine modeling, it can be seen that these models presented without considering the stator slot effect, 11–13 considering the stator slot effect, 14–17 considering the radial, 18 parallel or Halbach magnetization direction, 19 considering the surface mounted, surface-inset, or spoke-type PM arrangement 11,12,20 is done with infinite 21 or finite magnetic permeability, 22–26 with linear or non-linear ferromagnetic material, taking into account the effect of eddy current, etc. Thermal or magneto-thermal modeling of electric machines have been reported in limited works.…”

Section: Introductionmentioning

confidence: 99%

A semi-analytical, numerical and experimental study on performance characteristics of a novel hybrid-rotor CVT magnetic gearbox

Tavakoli

Jabbari

Sheykholeslami

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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With the development of hybrid electric vehicles and wind turbines, the demand for improved efficiency, increased maintenance life, increased reliability, reduced noise, and environmental considerations has increased. Meanwhile, magnetic gearboxes, in particular the technology of continuous variable transmission (CVT) systems, provide an opportunity to meet these needs. In this paper, while presenting four topologies of a novel coaxial hybrid-rotor CVT magnetic gearbox with a consequent-pole high-speed rotor, a simple precise semi-analytical model is presented based on the subdomain method for calculating the magnetic performance characteristics of the gearboxes. Magnetic equations have been rewritten in a pseudo-Cartesian coordinate system, and by applying the appropriate boundary conditions and interface conditions, the general solution and their coefficients have been extracted using the separation of the variables method. The performance characteristics of four studied gearboxes were compared semi-analytically and numerically. A prototype coaxial consequent-pole magnetic gearbox has been fabricated and the results of semi-analytical modeling have been compared with the results of numerical simulations and the experimental tests. The maximum error percentage of the results of numerical simulations and experimental tests is about three, which shows that the proposed semi-analytical model has a high accuracy. A comparison of magnetic torque, torque ripple and induced voltage is carried out between the investigated designs.

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“…In previous studies, an analytical method based on the subdomain technique was proposed to determine the performance characteristics of permanent magnet machines [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In this research, design and fabrication of a 30 kW axial flux permanent magnet brushless generator has been considered for a gearless wind turbine.…”

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confidence: 99%

Design Optimization of a Permanent Magnet Generator for Direct Drive Wind Turbine

Jabbari,

Basaki,

Sheykholeslami

2024

IJEE

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In this paper, an axial flux permanent magnet generator for a 30 kW direct drive wind turbine is designed and the design parameters were optimized with the aim of achieving high efficiency. In order to reduce the cogging torque and electromagnetic torque ripple components, the air core topology has been used, and with the aim of increasing the power capacity of the generator, a modular structure has been used. The advantage of the modular design is that each module can be considered as a generator unit and depending on the wind speed conditions, the number of units corresponding to the wind speed can be placed in the circuit and the generator will always work with maximum efficiency. First, by using the governing equations, the dimensions and performance characteristics of the generator are determined, and then a generator prototype is fabricated based on the electromagnetic design. In order to evaluate the output performance of the generator, machine simulation was performed in Maxwell finite element analysis software and the characteristic curves of voltage, current and ohmic losses were extracted. In order to evaluate the accuracy of the results, the outcomes of the analytical method have been compared with the experimental tests results.

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An analytical, numerical and experimental study on performance characteristics in a novel Vernier permanent magnet machine

Cited by 4 publications

References 34 publications

Optimal design of a modular axial‐flux permanent‐magnet synchronous generator for gearless wind turbine applications

Optimal design of a modular axial‐flux permanent‐magnet synchronous generator for gearless wind turbine applications

A semi-analytical, numerical and experimental study on performance characteristics of a novel hybrid-rotor CVT magnetic gearbox

Design Optimization of a Permanent Magnet Generator for Direct Drive Wind Turbine

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