Article
Energy & Fuels
Ji Qi, Zi Qiang Zhu, Luocheng Yan, Geraint Wyn Jewell, Chengwei Gan, Yuan Ren, Simon Brockway, Chris Hilton
Summary: This paper presents a general analytical model to analyze the cogging torque in consequent pole permanent magnet (CPPM) machines and other rotor PM machines with unequal north and south poles as well as pole shifting. The optimal slot opening and optimal pole-arc to pole-pitch ratio with/without pole shifting for minimal cogging torque are derived analytically and validated by finite element analyses and experiments. The findings reveal that the cogging torque in PM machines with unequal poles follows a different order than conventional PM machines with equal poles.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2023)
Article
Engineering, Electrical & Electronic
Canruo Chen, Xiang Ren, Dawei Li, Ronghai Qu, Kang Liu, Tianjie Zou
Summary: This article introduces a novel flux-switching permanent magnet machine with dual sets of magnet arrangements, significantly improving torque density by increasing the working harmonic contents of magnetomotive force and inherently reducing cogging torque. The study also investigates the effect of geometric parameters on average torque and cogging torque.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Article
Energy & Fuels
Lishuai Feng, Siyang Yu, Fengge Zhang, Shi Jin, Yujiang Sun
Summary: This study investigates the impact of rotor dynamic eccentricity on air-gap flux density, cogging torque, and losses in low-speed high-torque permanent magnet synchronous motors (LHPMSM) using both analytical methods and finite element analysis. The results indicate that increasing rotor eccentricity leads to a significant increase in harmonic distortion rate of air gap magnetic density and stator copper losses.
Article
Energy & Fuels
Ya Huang, Li Jiang, Hong Lei
Summary: This paper investigates the application of permanent magnet canned motor (PMCM) in domestic heating systems, and studies the method to reduce cogging torque by establishing a finite element model and analyzing the influence of different numbers and types of auxiliary slots. The study determines the optimal design solution for reducing cogging torque in PMCM.
Article
Engineering, Electrical & Electronic
Linwei Wang, Shuai Lu, Yangming Chen
Summary: To address complications from severe magnetic saturation and leakage flux, this paper proposes new methods to derive accurate closed-form 2D expressions for interior permanent magnet (IPM) machines. A virtual equivalence model is introduced to directly apply Laplace's equation and quasi-Poisson equation to IPM machines, leading to accurate flux density and relative permeance models. The resulting 2D analytical models show similar accuracy to finite element analysis (FEA) and are highly efficient in the design process of cogging torque optimization.
Article
Automation & Control Systems
Huangqiu Zhu, Ying Xu
Summary: This study investigates a novel method of right angle chamfering to reduce cogging torque in bearingless flux switching permanent magnet motors. Through parameter design, simulation, and analysis, the electromagnetic characteristics are optimized while compromising various design objectives. Experimental results verify the effectiveness and feasibility of the proposed scheme.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Ke Sun, Jianwen Shi, Wei Cui, Guoying Meng
Summary: The study focuses on the computational modeling of cylindrical permanent magnet coupling (CPMC) considering skin effect and working point of the permanent magnet to obtain magnetic circuit and eddy current characteristics. The transmission torque of CPMC was calculated based on Faraday's and Ampere's laws, with the accuracy of the model verified using finite element simulation and test bench.
Article
Engineering, Electrical & Electronic
S. Ali, J. Ikram, C. P. Devereux, S. S. H. Bukhari, S. A. Khan, N. Khan, J. -S. Ro
Summary: This research successfully reduces cogging torque and torque ripples in dual rotor single stator axial flux permanent magnet machine by employing an elliptical trapezoidal-shaped permanent magnet and genetic algorithm for optimization.
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Cen Chen, Chengzhi Sun, Liqin Wu, Xuerong Ye, Guofu Zhai
Summary: This paper proposes a model-based analysis method to study the impact of temperature on PMSMs. By using finite element analysis and digital modeling, the temperature influence on quality consistency can be depicted without destructive measurements.
QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL
(2023)
Article
Automation & Control Systems
Jingwei Zhu, Yuefei Zuo, Hao Chen, Jiahao Chen, Christopher H. T. Lee
Summary: Permanent magnet Vernier motors (PMVMs) have high torque density advantage for high-performance applications, but the low power factor challenge makes it unsuitable for direct-drive applications. This article presents an accurate modeling technique based on the conformal mapping method to obtain the performance metrics of PMVMs. The technique calculates both radial and tangential permeability functions, considering leakage flux and slotting effect, to achieve precise torque and power factor computations. Experimental results on a fabricated PMVM prototype confirm the high power factor and torque density achieved by the analytical model.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Vahid Zamani Faradonbeh, Akbar Rahideh, Mohammadreza Mostafavi Ghahfarokhi, Ebrahim Amiri, Aliakbar Damaki Aliabad, Gholamreza Arab Markadeh
Summary: This article presents an analytical solution procedure to investigate the geometrical impact of the magnet and the rotor core on the performance of slotted, surface-mounted permanent magnet synchronous motors, comparing four different motor configurations. The analysis is carried out using the concept of the surface magnetization current and the superposition theorem, with analytical results validated through finite element and experimental measurements on a motor prototype.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Automation & Control Systems
Chen Peng, Daohan Wang, Zhenkang Feng, Bingdong Wang
Summary: This article presents a new rotor configuration for reducing torque ripple and electromagnetic vibration in V-shaped interior permanent magnet machine. The proposed rotor structure optimizes the arrangement of magnets to offset unbalanced magnetic pull. The advantages of the new rotor configuration are demonstrated through comprehensive modeling and experimental validation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Energy & Fuels
Mei Kang, Liang Xu, Jinghua Ji, Xuhui Zhu
Summary: This paper investigates a hybrid permanent magnet excited vernier machine that can achieve high torque density and reduce material cost. By using rare earth magnets on the stator and ferrite magnets on the rotor, high-temperature demagnetization can be avoided. Furthermore, arranging the permanent magnets on the stator in an iron-cored Halbach array effectively reduces leakage flux and enhances flux density.
Article
Computer Science, Information Systems
Ijaz Ahmad, Junaid Ikram, Muhammad Yousuf, Rabiah Badar, Syed Sabir Hussain Bukhari, Jong-Suk Ro
Summary: This paper presents the performance improvement of a multi-rotor axial flux vernier permanent magnet machine with a proposed two-stage parallelogram-shaped PM, which reduces cogging torque and torque ripples due to its skew effect. The study also includes comparative analysis between conventional and proposed shape PM, as well as optimization using genetic algorithm and kriging method for further performance improvement.
Article
Energy & Fuels
Antonino Di Gerlando, Claudio Ricca
Summary: This paper presents an analytical study of the air-gap magnetic field of a Surface Permanent Magnet (SPM) linear machine under no load. The complex expression of the magnetic field of a conductor inside the air gap is retrieved using the method of images. The formulation of the magnetic field of a current sheet and a SPM is obtained by integrating the conductor expression.
Article
Computer Science, Interdisciplinary Applications
Brahim Ladghem Chikouche, Rachid Ibtiouen
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING
(2020)
Article
Computer Science, Interdisciplinary Applications
Brahim Ladghem Chikouche, Kamel Boughrara, Dubas Frederic, Rachid Ibtiouen
Summary: This paper introduces a new two-dimensional hybrid analytical model for magnetic field calculation in electrical machines, which combines an exact subdomain technique and magnetic equivalent circuit. The technique is applied to dual-rotor permanent magnet synchronous machines, providing accurate results under both no-load and on-load conditions. The direct coupling between the analytical model and magnetic equivalent circuit, as well as the modeling of current density distribution using Maxwell's equations, contribute to the originality and value of this research.
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Chikouche Brahim Ladghem, Kamel Boughrara, Dubas Frederic, Rachid Ibtiouen
Summary: This paper proposes an improved two-dimensional hybrid analytical method by coupling an exact analytical model with a magnetic equivalent circuit to calculate magnetic field solutions in ferromagnetic regions. The method shows accurate results for both no-load and on-load conditions, with the current density distribution modeled using Maxwell's equations for accuracy.
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Brahim Ladghem-Chikouche, Kamel Boughrara, Frederic Dubas, Rachid Ibtiouen
Summary: This article proposes an extended linear analytical solution based on the exact subdomain technique for any flat linear electromagnetic device, demonstrating excellent results in the application to a slotted linear synchronous machine with different iron core relative permeability values.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Zakarya Djelloul Khedda, Kamel Boughrara, Frederic Dubas, Baocheng Guo, El Hadj Ailam
Summary: The paper presents a 2D analytical model for predicting steady-state temperature distribution in permanent-magnet synchronous machines, considering heat transfer through conduction, convection, and radiation. The model is based on complex Fourier series and the separation of variables method, taking into account different thermal conductivities of machine parts and determining heat sources through power losses calculated with FEM. Validation of the model shows good results compared to thermal FEM analysis.
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Brahim Ladghem-Chikouche, Kamel Boughrara, Frederic Dubas, Lazhar Roubache, Rachid Ibtiouen
Summary: This article proposes a 2-D hybrid model for magnetic field calculation in electrical machines based on exact subdomain technique and finite-difference method. It combines the solution of Laplace's and Poisson's equations with the numerical model based on FDM to compute the magnetic field in different regions of the machine. The developed technique shows higher accuracy and faster computation speed compared to traditional FEA.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Automation & Control Systems
Baocheng Guo, Yunlu Du, Zakarya Djelloul-Khedda, Fei Peng, Jianning Dong, Yunkai Huang, Frederic Dubas, Kamel Boughrara
Summary: In this article, a novel nonlinear semianalytical model is proposed for magnetic field calculation of electric machines. The model takes into consideration the nonlinear properties and local saturation effect of the iron part, resulting in high accuracy of electromagnetic field results with low computational time cost.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Brahim Ladghem-Chikouche, Kamel Boughrara, Frederic Dubas, Rachid Ibtiouen
Summary: This paper proposes an extended hybrid analytical method (HAM) based on a 2-D coupling between the semi-analytical Maxwell-Fourier analysis and finite-element method (FEM) in polar coordinates. The model is applied to rotating electrical machines and aims to establish the magnetic field solution by coupling an exact analytical model (AM) with FEM in ferromagnetic regions. The HAM gives accurate results on magnetic flux density distribution and cogging torque, with satisfactory agreement with 2-D finite-element analysis (FEA) under various conditions.
ELECTRICAL ENGINEERING
(2023)
