A Hybrid Analytical Model for Permanent Magnet Vernier Machines Considering Saturation Effect

Zhu, Yun Ming; Xu, Liang; Zhao, Wenxiang; Cao, Donghui

doi:10.1109/tie.2021.3060656

Cited by 25 publications

(4 citation statements)

References 38 publications

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“…The modelling methods can be generally divided into numerical and analytical ones. The numerical methods are mainly based on the finiteelement analysis (FEA) [6], and analytical methods include the equivalent magnetic network (EMN) [7,8], the conformal mapping (CM) [9,10], the subdomain method [11,12] and others. In the initial design of the SPM motor, its structural and electromagnetic arrangements need to be continuously adjusted.…”

Section: Introductionmentioning

confidence: 99%

Hybrid analytical model for air‐gap magnetic field prediction of surface‐mounted permanent magnet motors with a quasi‐regular polygon rotor

Chen

Yuan

et al. 2023

IET Electric Power Appl

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In this article, a hybrid analytical model for a quasi‐regular polygon rotor (QPR) is proposed. It mainly uses the subdomain method and conformal mapping to solve a non‐circular boundary in the QPR. Firstly, the subdomain method combined with an equivalent surface current method is used to calculate the air‐gap magnetic field considering a slotted stator with a circular rotor. Secondly, by segmenting the non‐circular boundary in the QPR, the complex relative air‐gap permeance of the QPR can be calculated using the conformal mapping. Thirdly, this complex relative air‐gap permeance modifies the air‐gap magnetic field calculated in the first step to obtain the actual magnetic field distributions. Consequently, no‐load and loaded air‐gap flux densities, back‐electromotive force and torque can be obtained. A 12‐pole/3‐phase permanent magnet motor is modelled using the proposed hybrid analytical model, which is validated by finite‐element analysis and experiment. This proposed hybrid analytical model presents a new way of processing the QPR. Its calculation speed is nearly 50 times faster than the finite‐element analysis, which is of great help to the initial design and optimisation of machines with QPRs.

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Section: Introductionmentioning

confidence: 99%

Hybrid analytical model for air‐gap magnetic field prediction of surface‐mounted permanent magnet motors with a quasi‐regular polygon rotor

Chen

Yuan

et al. 2023

IET Electric Power Appl

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“…Oner et al (2016) have used the analytical model to calculate the cogging torque, magnet losses and efficiency of PMVMs. A hybrid analytical model has been proposed for PMVMs with considering the saturation of stator slot teeth, stator yoke and FMPs Zhu et al (2021). Liu et al (2012) proposed a novel FTPMVM for EV applications.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional analytical model for five-phase fault-tolerant permanent-magnet vernier machines

Mirzavand

Rahideh

2022

COMPEL

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Purpose This study aims to extract an analytical model for five-phase fault-tolerant permanent-magnet vernier machines (FTPMVMs) based on the analytical solution of Maxwell’s equations, which has some advantages than the finite element model. Design/methodology/approach FTPMVMs enhance the torque density by combining the vernier characteristics and the fault-tolerant feature. The principle operation of FTPMVMs is discussed based on the magnetic field modulation due to both permanent magnets and armature current. The analytical solution of the magnetic vector potential in each sub-region is obtained based on the sub-domain technique. Findings According to the calculated magnetic vector potential, the magnetic flux density, torque, self- and mutual inductance and back-electromotive force are calculated. The FEM is used to validate the results obtained from the proposed analytic model. Originality/value Two-dimensional analytical method is used to obtain the electromagnetic model of FTPMVMs.

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“…The fault detection based on the current signature of demagnetization has been presented for outer rotor PMSM (OR-PMSM) in [18]. There are some investigations used MEC method to analyze performance of PMVMs [19][20][21][22][23]. However, no research is reported focusing on modeling of PMVMs under the magnet defect fault using MEC method.…”

Section: Introductionmentioning

confidence: 99%

Modeling and detection of demagnetization fault in permanent magnet vernier machine using flexible magnetic equivalent circuit method

2021

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In this paper, an analytical model is proposed for evaluating electromagnetic performances of permanent magnet vernier machines (PMVMs) under healthy and faulty conditions. The proposed model employs flexible magnetic equivalent circuit (MEC) method, which its accuracy can be selected by tunable parameters. The model is capable of considering the influence of saturation effect, skewed slots, slot leakage fluxes, and various winding arrangements for the machines with desired properties. First, the proposed model is used to predict the no-load performance of machine at healthy condition. Then, the machine loading behaviors under healthy and demagnetization fault conditions are analyzed by the MEC model. Moreover, the results of the proposed model are compared and validated with those of 2D finite element method (FEM) and 3D-FEM. Eventually, a specific pattern is extracted from the stator current spectrum to detect the demagnetization fault.

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A Hybrid Analytical Model for Permanent Magnet Vernier Machines Considering Saturation Effect

Cited by 25 publications

References 38 publications

Hybrid analytical model for air‐gap magnetic field prediction of surface‐mounted permanent magnet motors with a quasi‐regular polygon rotor

Hybrid analytical model for air‐gap magnetic field prediction of surface‐mounted permanent magnet motors with a quasi‐regular polygon rotor

Two-dimensional analytical model for five-phase fault-tolerant permanent-magnet vernier machines

Modeling and detection of demagnetization fault in permanent magnet vernier machine using flexible magnetic equivalent circuit method

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