Analysis of Fractional-Slot Concentrated Winding PM Vernier Machines With Regular Open-Slot Stators

Li, Dawei; Zou, Tianjie; Qu, Ronghai; Jiang, Dong

doi:10.1109/tia.2017.2778686

Cited by 71 publications

(25 citation statements)

References 27 publications

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“…The operation of VM is primarily based on appropriately adjusting the motor air-gap flux densities to indirectly produce extra torque components. With concentrated windings, the air-gap flux density B of the VM can be generally expressed as [24]…”

Section: Investigations Of Vmmentioning

confidence: 99%

Performance comparisons of alternative permanent‐magnet motor designs for personal mobility‐assistive device applications

Liu

Yang

et al. 2020

IET Electric Power Applications

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Demands of appropriate personal mobility‐assistive devices for those needed persons have been increased considerably in recent years, with their specific operational requirements, developments of adequate motors to different device parts are the main concerns. For applications onto those knee joint parts of the exoskeleton system, three types of permanent‐magnet (PM) motors, namely the surface‐mounted PM motor, the Vernier motor, and the flux‐switching motor were designed. Based on the operational and physical constraints of the particular exoskeleton parts, optimisations of these PM motors were provided along with their thorough performance comparisons. From emulated finite‐element analyses along with hardware experimental validations, by following the standard test settings, selection guidance for the suitable motor structures at different operational objectives will thus be supplied.

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Section: Investigations Of Vmmentioning

confidence: 99%

Performance comparisons of alternative permanent‐magnet motor designs for personal mobility‐assistive device applications

Liu

Yang

et al. 2020

IET Electric Power Applications

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“…FSCW with two coil pitches have been proposed for improving power factor [94]. Measurements on the 18-slot/14-pole and 18-slot/26-pole PMVM show that the power factor can be improved to 0.91 and 0.92, respectively [94,95]. The design principle is given in [96].…”

Section: Approaches To Improve Power Factormentioning

confidence: 99%

Permanent magnet vernier machine: a review

El-Refaie

2019

IET Electric Power Applications

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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.

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“…Single-layer windings and fractional-slot concentrated windings are usually used for fault-tolerant PM generators. In particular, single-layer windings can provide additional magnetic circuit for armature windings to improve fault-tolerant capability [10]- [12]. However, these methods are aimed at improving fault-tolerant capability by adjusting winding topologies.…”

Section: Introductionmentioning

confidence: 99%

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

Zhao

Tang³

et al. 2020

Trans. Electr. Mach. Syst.

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In this paper, a new auxiliary teeth structure is proposed for fault-tolerant permanent magnet (PM) generators, which can reduce the short-circuit currents. Firstly, the short-circuit current and the phase to phase isolation of the fault-tolerant generator are analyzed briefly. Secondly, the auxiliary teeth structure is optimized to improve fault-tolerant capability. Then, the PM generators with different stator structures are compared to evaluate the proposed auxiliary teeth structure. Four critical generator parameters are investigated, i.e. back-electromotive forces, short-circuit currents, stator magneto motive force (MMF) harmonics, and torque performances. The results show that the proposed structure has better fault-tolerant capability than the conventional two-layer windings. Moreover, the stator MMF harmonics can be suppressed. Furthermore, the cogging torque and torque ripple can be suppressed by adopting the proposed structure. Finally, the simulated results are given to validate the theoretical analysis. Index Terms-Auxiliary teeth, fault-tolerant generator, magneto motive force, torque, finite-element method, permanent magnet generator.

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Analysis of Fractional-Slot Concentrated Winding PM Vernier Machines With Regular Open-Slot Stators

Cited by 71 publications

References 27 publications

Performance comparisons of alternative permanent‐magnet motor designs for personal mobility‐assistive device applications

Performance comparisons of alternative permanent‐magnet motor designs for personal mobility‐assistive device applications

Permanent magnet vernier machine: a review

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

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