Electromagnetic performance analysis of linear vernier machine with PM and HTS-Bulk

Arish, Nima

doi:10.1016/j.physc.2020.1353751

Cited by 10 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, PMVMs are characterised by their low power factor (PF), which is a result of high leakage flux and high winding reactance. In an effort to improve the PF of PMVMs, some researchers have proposed more complex topologies to reduce leakage flux, such as double-stator [32], double-rotor [33] and HTS-bulk PMVM [34]. PMVMs with high pole ratios generally utilise a relatively small number of stator pole pairs, combined with a notably greater number of slots.…”

Section: Shaftmentioning

confidence: 99%

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

Arish,

Kamper,

Wang

2024

WEVJ

View full text Add to dashboard Cite

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.

show abstract

Section: Shaftmentioning

confidence: 99%

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

Arish,

Kamper,

Wang

2024

WEVJ

View full text Add to dashboard Cite

show abstract

“…The power factor and power density of linear PM vernier generators can be significantly developed by adopting High-temperature superconducting (HTS) bulks. The relative permeability of HTS bulks is approximately equal to zero for the case that operation temperature does not exceed the critical temperature based on the Meissner effect [115]. Hence, the leakage flux is shielded, which results in the increment of the flux linkage and improving the power factor and power density [116].…”

Section: High-temperature Superconducting (Hts) Bulksmentioning

confidence: 99%

Linear Permanent Magnet Vernier Generators for Wave Energy Applications: Analysis, Challenges, and Opportunities

et al. 2022

View full text Add to dashboard Cite

Harvesting energy from waves as a substantial resource of renewable energy has attracted much attention in recent years. Linear permanent magnet vernier generators (LPMVGs) have been widely adopted in wave energy applications to extract clean energy from oceans. Linear PM vernier machines perform based on the magnetic gearing effect, allowing them to offer high power/force density at low speeds. The outstanding feature of providing high power capability makes linear vernier generators more advantageous compared to linear PM synchronous counterparts used in wave energy conversion systems. Nevertheless, they inherently suffer from a poor power factor arising from their considerable leakage flux. Various structures and methods have been introduced to enhance their performance and improve their low power factor. In this work, a comparative study of different structures, distinguishable concepts, and operation principles of linear PM vernier machines is presented. Furthermore, recent advancements and innovative improvements have been investigated. They are categorized and evaluated to provide a comprehensive insight into the exploitation of linear vernier generators in wave energy extracting systems. Finally, some significant structures of linear PM vernier generators are modeled using two-dimensional finite element analysis (2D-FEA) to compare their electromagnetic characteristics and survey their performance.

show abstract

“…Wave energy and wind energy is one of the most important renewable energies due to its relatively high energy density and high predictability, which requires electric converters to exploit it [3,4]. Linear Permanent Magnet Vernier Machine (LPMVM) is one of these converters, which has been used widely in several structures and operated base on the magnetic gear effect [5]. Magnetic gear effect is a phenomenon that magnetic field in the air gap with a small movement of translator changes remarkably, which provides the ability to produce high thrust force at low speeds.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

Arish

Marignetti

2021

IJE

View full text Add to dashboard Cite

Today, the importance of using vernier machines in wave energy converters has increased because of its simple structure and ability to generate a lot of thrust force at low speeds due to the magnetic gear effect. The linear vernier permanent magnet machine has been designed in various structures. Proper design and selection of the main parameters of the machine will improve performance and increase the efficiency of the linear vernier machine. One of these parameters is the shape of the permanent magnets and how they are magnetically oriented. The novelty of this paper is the reduction of leakage flux, achieved by changing the shape and orientation of the permanent magnet. Three types of linear permanent magnet vernier machines with different permanent magnet structures and orientation, including V-shape, Halbach array and consequent-pole are presented. The considered machines have been compared to each other and to the existing machine in terms of airgap flux density, back EMF, PM flux, Inductance, thrust force, detent force, loss, efficiency, power factor, flux density and flux line, using the finite element method in the same conditions and with the same volume of permanent magnets. The results show that the magnetic orientation and shape of the permanent magnet have a considerable effect on the leakage flux, and all the proposed models have a lower leakage flux and better performance compared to the existing model.

show abstract

Electromagnetic performance analysis of linear vernier machine with PM and HTS-Bulk

Cited by 10 publications

References 12 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

Linear Permanent Magnet Vernier Generators for Wave Energy Applications: Analysis, Challenges, and Opportunities

Evaluation of Linear Permanent Magnet Vernier Machine Topologies for Wave Energy Converters

Contact Info

Product

Resources

About