Leakage flux reduction of axial-flux switching PM machine by using HTS-disk

Arish, Nima

doi:10.1016/j.physc.2021.1353962

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…M active = M Fe + M PM + M Cu (13) where M Fe represents the combined mass of the stator and rotor iron laminations, M Cu represents the total mass of copper, which includes the end-winding, and M PM , represents the total mass of permanent magnets. X n is the input vector representing the variable parameters shown in Figure 6b.…”

Section: Multi-objective Function and Constraintmentioning

confidence: 99%

“…Numerous electrical motors designed for marine propulsion have been presented in the literature and compared in references [8][9][10]. The unique properties of high-temperature superconductor (HTS) materials have led to their application in high-power systems such as ship propulsion, resulting in improved performance [11][12][13]. However, the use of HTS materials in ship propulsion presents challenges, including increased complexity and the cost of the cooling system.…”

Section: Introductionmentioning

confidence: 99%

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Design and Optimisation of a 5 MW Permanent Magnet Vernier Motor for Podded Ship Propulsion

Arish,

Kamper,

Wang

2024

WEVJ

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The evolution of electric propulsion systems in the maritime sector has been influenced significantly by technological advancements in power electronics and machine design. Traditionally, these systems have employed surface-mounted permanent magnet synchronous motors (PMSMs) in podded configurations. However, the advent of permanent magnet Vernier motors (PMVMs), which leverage magnetic gearing effects, presents a novel approach with promising potential. This study conducts a comparative analysis between PMVMs and conventional PMSMs at a power level of 5 MW for podded ship propulsion, with a particular focus on the impact of gear ratios (Gr). An objective function was developed that integrates motor dimension constraints and the power factor (PF), a critical yet frequently neglected parameter in existing research. The findings indicate that PMVMs with lower Gr have lower mass and cost compared to those with higher Gr and traditional PMSMs, at a PF level of 0.7, which is high for Vernier machines. Moreover, PMVMs with lower Gr achieve efficiencies exceeding 99%, outperforming both their higher Gr counterparts and conventional PMSMs. The superior performance of PMVMs is attributed to lower current density and reduced copper loss, which contribute to their enhanced thermal performance. These details are elaborated on further in the paper. Consequently, these findings suggest that PMVMs with lower Gr are particularly well suited for high-power maritime propulsion applications, offering advantages in terms of compactness, efficiency (EF), cost-effectiveness, and thermal performance.

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Section: Multi-objective Function and Constraintmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Optimisation of a 5 MW Permanent Magnet Vernier Motor for Podded Ship Propulsion

Arish,

Kamper,

Wang

2024

WEVJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…Traditionally, researchers or engineers have focused on the performance of the top surface B T because its B T is relatively higher than the bottom surface B T . However, we cannot completely ignore the influence of the bottom surface B T since it may be harmful to magnetic leakage protection [52], magnetic flux convergence [53] and electromagnetic shielding [54] in HTS motor machines or levitation devices. Therefore, it is necessary to figure out the difference between the bottom and top surface B T .…”

Section: Difference Between the Bottom And Top Surface B Tmentioning

confidence: 99%

Analysis of critical current inhomogeneity in r–z plane of GdBCO superconducting bulk and simulation of flux jumps during pulsed field magnetization

Yang

Zhou

et al. 2023

Supercond. Sci. Technol.

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In pulsed field magnetization (PFM), the phenomenon of flux jump is capable of driving magnetic flux vortexes into GdBCO superconducting bulk center to aid full magnetization. Varieties of homogeneous critical current density (Jc) models have been implemented to reproduce flux jumps, but simulated multi-physical responses differ from experimental observations. This paper proposes a modified Jc model to consider r-z plane Jc inhomogeneity and simulates flux jumps under experimental conditions by solving a 2D axisymmetric electromagnetic-thermal coupled model. A numerical treatment is developed to reflect the break of shielding current during flux jumps. The accuracy of our model is verified by comparisons of the calculation results of trapped magnetic fields (BT) and the PFM and field cooling (FC) experimental results. On this basis, we investigate the improvement of inhomogeneous Jc model and obtain the multi-physical responses which have better agreement with the experimental results compared to homogeneous Jc model. Moreover, to further test the ability of the inhomogeneous Jc model to predict anisotropy of spatially magnetic field distribution, the simulated BT profiles in top and bottom surfaces of HTS bulk at 77 K are compared to the experiments. This study may provide a new approach for modelling the inhomogeneity of Jc characteristics and a useful analysis tool for industrial devices using high-temperature superconductor (HTS) bulk magnets.

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A Flux-Switching Permanent Magnet Machine with HTS Bulks and Radially Magnetized PMs Arranged

Jing

Min

Kui

et al. 2023

IEEE Trans. Appl. Supercond.

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Leakage flux reduction of axial-flux switching PM machine by using HTS-disk

Cited by 4 publications

References 19 publications

Design and Optimisation of a 5 MW Permanent Magnet Vernier Motor for Podded Ship Propulsion

Design and Optimisation of a 5 MW Permanent Magnet Vernier Motor for Podded Ship Propulsion

Analysis of critical current inhomogeneity in r–z plane of GdBCO superconducting bulk and simulation of flux jumps during pulsed field magnetization

A Flux-Switching Permanent Magnet Machine with HTS Bulks and Radially Magnetized PMs Arranged

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