Equivalent Magnetic Network Modeling of Dual-Winding Outer-Rotor Vernier Permanent Magnet Machine Considering Pentagonal Meshing in the Air-Gap

Ghods, Mehrage; Gorginpour, Hamed; Bazrafshan, Mohammad Amin; Toulabi, Mohammad Sedigh

doi:10.1109/tie.2021.3131796

Cited by 19 publications

(12 citation statements)

References 18 publications

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“…The rest of the modelling relations have been already well discussed in Refs. [18,19] and the corresponding modified flowchart is highlighted in Figure 13.…”

Section: Model Algorithm Solutionmentioning

confidence: 99%

“…The procedure of the analytical evaluation of cogging torque distribution in the EMN model with pentagonal air-gap meshing is comprehensively presented in Ref. [18]. Figure 17b illustrates the cogging torque obtained from FEM, EMN model, and experiment.…”

Section: Cogging Torque Waveformmentioning

confidence: 99%

“…where D ave is the average diameter of the air-gap, g o and l b are the air-gap length and variable permeance layer length, respectively. On the other hand, there are N r nodes on the outermost layer of mesh network of rotor core, covering angle of θ rt = 360°/N r for each node, where N r , obtained from Equation (18), is lower than n air-gap,Node , hence, θ rt > θ n,ag . Each of N r nodes is connected to N vp number of varying permeances.…”

Section: Variable Permeance Connection Modellingmentioning

confidence: 99%

“…The integral limits k 1 and k 2 are considered as such that five permeances forming the pentagon sides are equal to μ o l stk [18].…”

Section: Equivalent Magnetic Network Modelmentioning

confidence: 99%

“…The continuous positioning method and its differences with the discrete positioning method are discussed in Ref. [18].…”

Section: Variable Permeance Connection Modellingmentioning

confidence: 99%

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Design of a non‐ferromagnetic spoke array Vernier permanent magnet generator with iron‐bar based on enhanced equivalent magnetic network model

Ghods

Faiz

Rashipour

et al. 2022

IET Electric Power Appl

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The spoke‐type arrangement of permanent magnets (PMs) in rotor of Vernier PM (VPM) machines was first introduced in a dual‐stator topology to overcome low‐power drawback of VPM machines. However, this structure is mostly applicable for high‐power motor drives. A non‐ferromagnetic spoke array VPM generator with a special rotor structure for small‐scale wind turbine generator is presented. The leakage flux lines tend to be aligned with the main flux routes due to a special design of flux barriers in end portion of PM housings. High torque‐density, low weight, torque‐speed curve with a wide constant torque region, promising efficiency, and power factor are the advantages of the proposed machine. An Equivalent‐Magnetic‐Network (EMN) model is established for predicting the complex behaviour of flux lines and operating quantities of the proposed structure with reasonable accuracy. The contribution of the modelling method includes a special mesh cell for the air‐gap permeance network to more accurately capture the flux routes, continuous positioning method for omitting spikes on post‐processing waveforms due to numerical errors, and a stable solving flowchart with a high convergence rate. The validity of the EMN model is validated by comparing the operating waveforms of the machine with the corresponding waveforms obtained by the finite element and experiments. The cover image is based on the Research Article Design of a non‐ferromagnetic spoke array Vernier permanent magnet generator with iron‐bar based on enhanced equivalent magnetic network model by Mehrage Ghods et al., https://doi.org/10.1049/elp2.12272.

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“…The rest of the modelling relations have been already well discussed in Refs. [18,19] and the corresponding modified flowchart is highlighted in Figure 13.…”

Section: Model Algorithm Solutionmentioning

confidence: 99%

Section: Cogging Torque Waveformmentioning

confidence: 99%

Section: Variable Permeance Connection Modellingmentioning

confidence: 99%

“…The integral limits k 1 and k 2 are considered as such that five permeances forming the pentagon sides are equal to μ o l stk [18].…”

Section: Equivalent Magnetic Network Modelmentioning

confidence: 99%

“…The continuous positioning method and its differences with the discrete positioning method are discussed in Ref. [18].…”

Section: Variable Permeance Connection Modellingmentioning

confidence: 99%