Quantitative Comparison for Fractional-Slot Concentrated-Winding Configurations of Permanent-Magnet Vernier Machines

Yang, Junqin; Liu, Guohai; Zhao, Wenxiang; Chen, Qian; Jiang, Yicheng; Sun, Longgang; Zhu, Xiaoyong

doi:10.1109/tmag.2013.2243407

Cited by 89 publications

(27 citation statements)

References 8 publications

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“…The second one is called the hybrid Vernier machine; the PMs are placed on the stator teeth surface modulating the flux from the stator coils, and the rotor has only teeth [7]. Fractional-slot concentrated-winding PMVMs are becoming attractive in many applications due to winding harmonic reduction [8]. Since the split-pole PMVM is first presented, researches on novel topologies focus on concentrated winding in [8] and high-torque-density PM Vernier machine with multiple working harmonics in [9].…”

Section: Introductionmentioning

confidence: 99%

A quantitative comparison among different types of auxiliary slot, auxiliary tooth, and the slot opening in split-pole Vernier machine

Alavijeh

Shamlou

2020

Electr Eng

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The Vernier permanent magnet machine is a high-torque, low-speed system suitable for direct-drive applications such as in-wheel electrical machines and wind generation turbines. In this paper, specific critical parameters of the electrical machine for auxiliary tooth and slot are investigated in different conditions. It should be noted that all the models are fully optimized and compared under the same condition by FEA analysis. The results illustrate that the stator with α β θ is the best choice for stator split pole. Also, the concentrated winding is wound around the main stator tooth and the magnets mounted on the rotor surface. Besides, all essential characteristics for an electric machine such as torque, cogging torque, power factor, and efficiency are investigated. Furthermore, many basic formulas for designing a Vernier machine are proposed. This comparison helps designers choose the best combination among α, β, and θ in the split-pole structures. There is a nomenclature to organize this manuscript for the reader. It should be noted that all the figures are baked by ANSYS Electronics Maxwell version 19.0. Moreover, all of them are modified by Origin software to show with high quality.

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Section: Introductionmentioning

confidence: 99%

A quantitative comparison among different types of auxiliary slot, auxiliary tooth, and the slot opening in split-pole Vernier machine

Alavijeh

Shamlou

2020

Electr Eng

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“…ernier permanent magnet synchronous machine (VPMSM) has become a promising candidate in direct drive application because of high torque density and low torque ripple [1] [2]. Quantitative comparisons have been made between VPMSM, conventional PM machines [3] [4] and magnetically-geared machines [5], showing that the VPMSM has the highest torque density.…”

Section: Introductionmentioning

confidence: 99%

A High-Power Factor Vernier Machine With Coil Pitch of Two Slot Pitches

Liu

Zhu

2018

IEEE Trans. Magn.

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In this paper, an 18-slot/26-pole Vernier permanent magnet synchronous machine (VPMSM) with coil-pitch of two slot pitches is proposed based on a 9-slot/18-flux-modulation-pole/26-pole VPMSM with concentrated tooth-coil windings. Compared with the original VPMSM, the number of slots is doubled and the phase winding connection is adjusted to reduce the space harmonic content, the phase inductance, and hence, improve the power factor. The study shows that the proposed VPMSM increases power factor from 0.73 to 0.95 with better torque and flux weakening capability. Moreover, a series of VPMSMs with high power factor are proposed from the same design principle and given design guidelines.

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“…Further reduction of losses would be obtained by adopting distributed kind of windings in place of the concentrated non-overlapping windings. It is shown in [4] that, the single-layer wound machines have higher winding factors and consequently are good candidates for larger torquedensity compared to their double-layer equivalents. Li et al [5] show that the losses of fractional slot concentrated-winding PM machines reduces with increasing number of winding layers, although the lower winding-layer machines would produce higher electromagnetic output torque.…”

Section: Introductionmentioning

confidence: 99%

Coil- and phase-flux-linkage characteristics of dual excited permanent magnet machijnes equipped with different winding configurations

Awah¹,

Okoro²

2018

Nig. J. Tech.

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The flux-linkage characteristics of dual excited permanent magnet (PM) machines equipped with concentrated windings of single-and double-layer types is investigated in this paper. This includes precise comparison of the coil and phase flux-linkage waveforms of the machines having different stator and rotor pole topologies. It is observed that, the developed machine having double layer-wound configuration have unipolar coil flux linkage waveforms, although with a resultant bipolar phase flux-linkage waveforms on summation, while their corresponding single layer-wound counterparts are characterised by both bipolar coil and phase flux-linkage waveforms. Also, the opposite coils of the machines having single-layer windings as well as even rotor pole topology produces coil flux-linkage waveforms whose shape and magnitude are identical and same; thus, resulting to more phase harmonics unlike their counterparts that are equipped with odd rotor poles and single-layer winding configuration whose coil waveforms are shifted, thereby resulting to effective cancellation of harmonics in the resultant phase waveforms. In general, the single-layer-wound machines exhibit higher peak-to-peak and fundamental flux-linkage values than their doublelayer-wound equivalents.

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Quantitative Comparison for Fractional-Slot Concentrated-Winding Configurations of Permanent-Magnet Vernier Machines

Cited by 89 publications

References 8 publications

A quantitative comparison among different types of auxiliary slot, auxiliary tooth, and the slot opening in split-pole Vernier machine

A quantitative comparison among different types of auxiliary slot, auxiliary tooth, and the slot opening in split-pole Vernier machine

A High-Power Factor Vernier Machine With Coil Pitch of Two Slot Pitches

Coil- and phase-flux-linkage characteristics of dual excited permanent magnet machijnes equipped with different winding configurations

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