Electromagnetic Analysis and Experimental Testing of a Flux Focusing Wind Turbine Magnetic Gearbox

Li, Kang; Modaresahmadi, Sina; Bird, Jonathan Z.; Wright, Jason D.; Barnett, D.M.

doi:10.1109/tec.2019.2911966

Cited by 33 publications

(8 citation statements)

References 20 publications

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“…The rated current density of armature winding is set as 6 A/mm 2 , and the initial design parameters of the DFM-MGM are given in Table I. Since the end-effects neglected by the two-dimensional FE method (FEM) may adversely affect the torque transmission capacity of the CMGs [18] and MGMs [19], in order to achieve high accuracy field analysis, the 3D FEM that takes into account the end-effects is used to calculate the ST and STPPV of the DFM-MGM. To verify the mesh independence of the FE…”

Section: A Fe Modelingmentioning

confidence: 99%

Multi-Objective Robust Optimization of a Dual-Flux-Modulator Magnetic Geared Machine With Hybrid Uncertainties

Liu

Zhao

Zhu

et al. 2020

IEEE Trans. Energy Convers.

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In order to improve the robustness and torque performance of a dual-flux-modulator magnetic-geared machine (DFM-MGM) considering simultaneously both random and interval uncertainties of design parameters, a multi-objective robust optimization (MORO) method with multiple Monte Carlo simulations (MCSs) is proposed. In this method, the multiple MCSs are adopted to evaluate the effects of parametric hybrid uncertainties on the robustness of optimization results. To build a MORO model of the DFM-MGM, the three-dimensional finite element model is established firstly and then validated by the experiment. Through a parametric study, it is found that five dimensional parameters of the permanent magnets (PMs) and stator have more significant effects on the stall torque (ST) and ST per PM volume (STPPV). Finally, a multi-objective particle swarm optimization algorithm with surrogate models, sigma criteria design and multiple MCSs method is implemented to solve the MORO problem. Both the average standard deviations and standard deviation differences of the ST and STPPV are used to deal with hybrid uncertainties during MORO. The optimized DFM-MGM by MORO has a STPPV 6.3% higher than that of the initial design under the same ST constraint. Moreover, the average standard deviations and standard deviation differences obtained by MORO are much smaller than those achieved by the deterministic optimization, indicating that the robustness of optimal results can also be significantly improved by the MORO.

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Section: A Fe Modelingmentioning

confidence: 99%

Multi-Objective Robust Optimization of a Dual-Flux-Modulator Magnetic Geared Machine With Hybrid Uncertainties

Liu

Zhao

Zhu

et al. 2020

IEEE Trans. Energy Convers.

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“…Magnetic gear is an electromagnetic device driven by non-contact magnetic force, which has the advantages of low noise, low vibration, maintenance free, and inherent overload protection [1][2][3]. At present, magnetic gears are used in many low-speed and high torque situations, especially in combination with permanent magnet motors, such as electric vehicles [4,5], wind power generators [6,7], and marine electric propulsion [8,9].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Electromagnetic Performance of Magnetic Gear

Huang¹,

Guo²,

Jing³

2021

PIER Letters

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In order to investigate the influence of different magnetization modes on the electromagnetic performance of magnetic gear, four models of magnetic gear with different magnetization modes are established. The finite element method is used to simulate the four models and compare their performances. The distribution of magnetic flux lines, air gap magnetic field, harmonic distribution, static torque, and dynamic torque are calculated, respectively. The simulation results show that the coaxial magnet gear with Halbach array has larger air gap flux density amplitude, smaller air gap harmonic content, and higher output torque than the other three kinds of magnetic gears.

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“…Compared with the conventional mechanical gear, the magnetic gear has many advantages, such as no friction, low vibration noise, no lubrication, overload protection, and less maintenance [3][4][5]. At present, magnetic gears have been applied in many low-speed and high torque occasions, especially in the combination with permanent magnet motor, such as wind power generator [6,7], electric vehicles [8,9], and ship electric propulsion [10,11].…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Harmonic Gear With Double Fan-Shaped Halbach Arrays

Huang¹,

Jing²

2021

PIER Letters

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Compared with the conventional coaxial magnetic gear, magnetic harmonic gear (MHG) is a device with large transmission ratio. In order to improve the transmission torque, an MHG with double fan-shaped Halbach arrays is proposed in this paper. According to the theory of magnetic field modulation and the unique unilateral effect of Halbach array, both inner and outer permanent magnets (PMs) are arranged in a Halbach array. In addition, all PMs are fan-shaped. The air gap magnetic field and torque of MHG are analyzed by two-dimensional finite element method. Compared with the conventional MHG, the proposed MHG enhances the air-gap magnetic flux density, reduces the air-gap harmonic content, and increases the torque density.

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Electromagnetic Analysis and Experimental Testing of a Flux Focusing Wind Turbine Magnetic Gearbox

Cited by 33 publications

References 20 publications

Multi-Objective Robust Optimization of a Dual-Flux-Modulator Magnetic Geared Machine With Hybrid Uncertainties

Multi-Objective Robust Optimization of a Dual-Flux-Modulator Magnetic Geared Machine With Hybrid Uncertainties

Comparative Analysis of Electromagnetic Performance of Magnetic Gear

A Magnetic Harmonic Gear With Double Fan-Shaped Halbach Arrays

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