Performance Comparison of PM Synchronous and PM Vernier Machines Based on Equal Output Power per Unit Volume

Jang, Daekyu; Chang, Junghwan

doi:10.5370/jeet.2016.11.1.150

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…is defined as the ratio of to . The inter pole leakage factor ( ) is given by [22] (9) where is the rotor pole pitch and is the mechanical air gap length as shown in Fig. 2.…”

Section: Analytical Modelling Of Power Factormentioning

confidence: 99%

“…In addition, its inherent low torque ripple makes it very suitable for low-speed direct drive applications [7,8]. However, a relatively low power factor compared to conventional permanent magnet (PM) machines currently prevents its penetration into wider industrial applications [9][10][11] due to the requirement for larger converter ratings, which could lead to increase in system cost and losses. Several novel Vernier topologies have been proposed in the past to improve the power factor of such machines [12][13][14][15] to address this critical issue.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of scaling effect on power factor of permanent magnet Vernier machines for wind power application

Padinharu

Zhu

et al. 2020

IET Electric Power Applications

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This paper investigates the scaling effect on power factor of surface mounted permanent magnet Vernier (SPM-V) machines with power ratings ranging from 3kW, 500kW, 3MW to 10MW. For each power rating, different slot/pole number combinations have been considered to study the influence of key parameters including inter-pole magnet leakage and stator slot leakage on power factor. A detailed analytical modelling, incorporating these key parameters, is presented and validated with 2D Finite Element Analysis (FEA) for different power ratings and slot/pole number combinations. The study has revealed that with scaling (increasing power level), significant increase in electrical loading combined with the increased leakage fluxes, i.e. (a) magnet leakage flux due to large coil pitch to rotor pole pitch ratio, (b) magnet inter-pole leakage flux and (c) stator slot leakage flux, reduces the ratio of armature flux linkage to PM flux linkage and thereby has a detrimental effect on the power factor. Therefore, unlike conventional SPM machines, the power factor of SPM-V machines is found to be significantly reduced at high power ratings.

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“…is defined as the ratio of to . The inter pole leakage factor ( ) is given by [22] (9) where is the rotor pole pitch and is the mechanical air gap length as shown in Fig. 2.…”

Section: Analytical Modelling Of Power Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of scaling effect on power factor of permanent magnet Vernier machines for wind power application

Padinharu

Zhu

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…The machine is derived from the earlier Vernier reluctance machine [1]. Because of the magnetic gearing effect, PMVM has high-power characteristic [2,3]. Various literatures show that PMVM can be a viable option for size and cost reduction.…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of a Dual-Stator, Spoke-Type Permanent Magnet Vernier Machine with Support Bar

Park

Lukman

Kang³

et al. 2021

Energies

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Permanent magnet Vernier machine (PMVM) is a strong candidate for direct-drive applications in low-speed region because its power characteristic is higher than conventional permanent magnet machine (PMM). In this paper, the design of a dual-stator PMVM (DSPMVM) with spoke-type rotor is introduced. As a radial motor with dual-stator configuration, one on the outer and inner side, the rotor is equipped with support bars for practical and simple manufacturing, which is the aim of this study. The characteristics and performance of the proposed machine with and without the support bar are examined with finite element analysis (FEA). The DSPMVM and the support were manufactured and tested through experiments to verify proposed structure. Both simulation and experiment results show that there is little to no difference in performance when the support bar is equipped. Furthermore, the average deviation between simulation and experiment results is approximately 7% which is within the acceptable range.

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“…Nowadays, the PM machine utilizing NdFeB magnet is popular due to its high efficiency, high power density, and simple structure [1,2]. On one hand, according to the manufacturing process, the NdFeB magnet can be classified into sintered and bonded types.…”

Section: Introductionmentioning

confidence: 99%

Residual Magnetic Flux Density Distribution Calculation Considering Effect of Aligning Field for Anisotropic Bonded NdFeB Magnets

Han¹,

Ren²,

Koh³

2016

Journal of Electrical Engineering and Technology

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-This paper presents a calculation method of residual magnetic flux density distribution for a four-pole anisotropic bonded NdFeB permanent magnet (PM) considering the effect of aligning magnetic field during the forming process. To manufacture the anisotropic bonded NdFeB magnet, the magnet powder needs to be aligned with a proper aligning field before magnetizing. Therefore, it is necessary to analyze the magnetizing process based on the aligning field analysis to determine accurate distribution of residual magnetic flux density (B r ) for the anisotropic bonded NdFeB PM. In order to estimate the B r distribution of the anisotropic bonded NdFeB magnet, an analysis method by combining the external electric circuit equation coupled with the transient finite element method and the scalar Jiles-Atherton hysteresis model is proposed.

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Performance Comparison of PM Synchronous and PM Vernier Machines Based on Equal Output Power per Unit Volume

Cited by 11 publications

References 7 publications

Investigation of scaling effect on power factor of permanent magnet Vernier machines for wind power application

Investigation of scaling effect on power factor of permanent magnet Vernier machines for wind power application

Performance Characteristics of a Dual-Stator, Spoke-Type Permanent Magnet Vernier Machine with Support Bar

Residual Magnetic Flux Density Distribution Calculation Considering Effect of Aligning Field for Anisotropic Bonded NdFeB Magnets

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