HTS dual-stator spoke-type linear vernier machine for leakage flux reduction

Baloch, N.; Khaliq, S.; Kwon, B.

doi:10.1109/intmag.2017.8008006

Cited by 6 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The linear Vernier machine shown in Figure 6A enjoys a double‐sided secondary. The main merit of this configuration is that the toroidal coils can be used leading to a very short end connection compared to the distributed one [17‐20]. The primary core has some symmetrical open slots.…”

Section: Theoretical Base Of Machine Performancementioning

confidence: 99%

See 1 more Smart Citation

Design and performance of linear Vernier generators—The state of the art and case study

Faiz

Amini‐Valeshani

Ghods

2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary Although Vernier machines have been introduced a long ago, their description, applications, and design improvement have been recently proposed. This paper reviews different types of linear Vernier machine. Their description and theoretical base of the performance are presented. The performance of the motor is improved by reducing the cogging force, increasing the power factor, and enhancing force density. Stator and translator structures, the arrangement of magnets, and the type of coils of permanent magnet (PM) Vernier machines are reviewed and classified. Then, the electromagnetic performance prediction and energy conversion process in the machine is described. The magnetic field distribution and air gap permeance analysis indicate that such analysis is very complicated than that of other PM machines. Impacts of variations of dimensions in the machine such as the number of modulators on the modulus width and thickness of the mover PMs on the load characteristics (cogging torque and Back‐EMF) are addressed. Besides, principles of operation of flux modulation machines are presented and the shape and dimensions of the modulators are optimized. Finally, a 150 W linear PM Vernier generator is designed and prototyped to the energy harvested by the ocean wave.

show abstract

Section: Theoretical Base Of Machine Performancementioning

confidence: 99%

“…The main idea proposed in [7,18‐28] is adding an auxiliary DC field as additional excitation so that the auxiliary coil increases the magnetic flux of the air‐gap already generated by the PMs. It is clear from Figure 19 that the structure of the machine is similar to that of the PM Vernier machines with separated poles.…”

Section: Vernier Machines Structurementioning

confidence: 99%

Design and performance of linear Vernier generators—The state of the art and case study

Faiz

Amini‐Valeshani

Ghods

2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…To reduce the leakage flux in stator tooth, a design with high‐temperature superconductor (yttrium barium copper oxide) bulks inserted between modulation poles is reported [98–101]. The inherent magnetic shielding effect of HTS materials results in a significant power factor improvement from 0.4 to 0.6 in a double‐stator spoke‐type linear PMVM for wave energy extraction.…”

Section: Advanced Materialsmentioning

confidence: 99%

Permanent magnet vernier machine: a review

El-Refaie

2019

IET Electric Power Applications

View full text Add to dashboard Cite

Permanent magnet vernier machines (PMVMs) gained a lot of interest over the past couple of decades. This is mainly due to their high torque density enabled by the magnetic gearing effect. This study will provide a thorough review of recent advances in PMVMs. This review will cover the principle of operation and nature of magnetic gearing in PMVMs, and a better understanding of novel PMVM topologies using different winding configuration as well as different modulation poles and rotor structures. Detailed discussions on the choice of gear ratio, slot-pole combinations, design optimisation and role of advanced materials in PMVMs will be presented. This will provide an update on the current state-of-the art as well as future areas of research. Furthermore, the power factor issue, fault tolerance as well as cost reduction will be discussed highlighting the gap between the current state-of-the art and what is needed in practical applications.

show abstract

“…Reducing the armature inductance can also improve the power factor and this can be achieved by choosing a proper pole ratio as discussed in [5]; however, the power factor is still lower than that of a conventional PM machine. Furthermore, reducing the flux leakage or increasing the flux linkage can also improve the power factor of a PMVM [6].…”

Section: Introductionmentioning

confidence: 99%

Wide speed range operation of permanent magnet vernier machines

2018

Self Cite

View full text Add to dashboard Cite

This letter proposes winding switching for the high-performance of permanent-magnet vernier machines (PMVMs) in wide speed range operation. The machine is operated in two modes: cumulative and differential. Before winding switching (cumulative mode), the machine is operated like a conventional three-phase PMVM. The machine provides high torque density and high efficiency in this mode. After winding switching (differential mode), the back EMF and inductance of the machine are decreased significantly, which enable wide speed range operation and the attainment of high power factor in high-speed operation.

show abstract

HTS dual-stator spoke-type linear vernier machine for leakage flux reduction

Cited by 6 publications

References 3 publications

Design and performance of linear Vernier generators—The state of the art and case study

Design and performance of linear Vernier generators—The state of the art and case study

Permanent magnet vernier machine: a review

Wide speed range operation of permanent magnet vernier machines

Contact Info

Product

Resources

About