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Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and...
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Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Machines Testing and Maintenance".

Deadline for manuscript submissions: closed (15 November 2023) | Viewed by 15261

Special Issue Editor

Dr. Stjepan Stipetić

E-Mail Website
Guest Editor
Faculty of Electrical Engineering and Computing (FER), Department of Electric Machines, Drives and Automation, University of Zagreb, Unska 3, 10000 Zagreb, Croatia
Interests: analysis, modeling, design, optimization, prototyping and testing of electrical machines

Special Issue Information

Dear Colleagues,

I cordially invite you to contribute an article to the Special Issue of the MDPI's journal Machines on the topic of "Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines”. The central theme of this Special Issue focuses on advances in optimization and modelling of the most important and most widely used types of electrical machine: induction machines and what we generally call brushless synchronous AC machines. New modelling methods and improvements in optimization deserve more attention in today's world of transportation electrification, green transition, and higher demands on power density, torque density, and increased efficiency. Experimental verification of proposed scientific contributions is highly appreciated.

Topics of interest may include but are not limited to:

  • Two-dimensional analytical, semi-analytical, and FEA modelling; handling of 3D and end-effects
  • Electromagnetic design, thermal design, mechanical design;
  • Loss modelling (AC winding losses, iron losses, permanent magnet losses, stray load losses);
  • Windings (technology, layout, retrofitting, AC loss reduction);
  • Polyphase machines;
  • Design for fault-tolerance;
  • Improvements in production technology and material modelling;
  • Prototype testing methods; 
  • Transition towards higher efficiency classes (IE5);
  • Improvements in optimization methodology, optimization methods;
  • Multi-objective, multi-physical, multi-level optimization;
  • Optimization based on surrogate models / meta-models;
  • Robustness and uncertainty in optimization;
  • Optimization scenarios for renewable generation applications, traction applications, aerospace applications or industrial drive applications.

It is recommended to send a tentative title and a short summary of the manuscript to Machines Assistant Editor Ms. Amy Liu .

Dr. Stjepan Stipetić
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Machines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • induction machines
  • synchronous permanent magnet machines
  • synchronous reluctance machines
  • electrical traction motor drive
  • design optimization

Published Papers (4 papers)

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Research

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15 pages, 6875 KiB  
Article
Analysis and Design of Novel Axial Field Flux-Modulation Permanent Magnet Machines for Direct Drive Application
by Jie Li, Gongde Yang and Fei Rao
Machines 2022, 10(7), 495; https://doi.org/10.3390/machines10070495 - 21 Jun 2022
Cited by 2 | Viewed by 1505
Abstract
Axial field flux-modulation permanent magnet (AF-FMPM) machines have been developed for direct drive applications such as wind power generation, HEVs, and railway traction. However, the existing studies on AF-FMPM machines are limited to the PM rotor structure, and less research has been carried [...] Read more.
Axial field flux-modulation permanent magnet (AF-FMPM) machines have been developed for direct drive applications such as wind power generation, HEVs, and railway traction. However, the existing studies on AF-FMPM machines are limited to the PM rotor structure, and less research has been carried out on AF-FMPM machines with PM stator structure. This paper studies two axial field flux-modulation permanent magnet (AF-FMPM) machines, i.e., NS or NN type, which all consist of the same stator and rotor structures but the dual identical outer surface-mounted PM stators face each other in different position. A comprehensive theoretical analysis and global optimization of the AF-FMPM machine based on ANSYS Maxwell 3-D FEA is presented. The performance comparisons between the AF-FMPM machine (NS) and AF-FMPM machine (NN) are presented, including the influence of the critical structural dimensions on the machine performance, phase flux linkage, phase back EMF, cogging torque, and average torque performance. The results show that the phase back EMF and average torque of the AF-FMPM machine (NS) are more sinusoidal and higher than that of the AF-FMPM machine (NN). Furthermore, the NS type machine shows the non-saliency characteristics, while the NN type machine is the salient machine. Full article
(This article belongs to the Special Issue Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines)
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18 pages, 8155 KiB  
Article
Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor
by Bo Pan, Dajun Tao, Baojun Ge, Likun Wang and Peng Hou
Machines 2022, 10(5), 346; https://doi.org/10.3390/machines10050346 - 08 May 2022
Cited by 5 | Viewed by 2172
Abstract
Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in [...] Read more.
Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate system was established. Considering the armature reaction, the end effect, and the current harmonics generated by variable frequency power supply, the eddy current loss of the rotor at different frequencies was analyzed and calculated using the analytical and finite element methods (FEM). When the frequency is between 200 Hz and 600 Hz, the variation trend of the rotor eddy current loss with a frequency obtained by analytical calculation and FEM analysis is roughly the same, and the error is still within a reasonable range. However, as the frequency continues to increase, the error between the two becomes larger and larger. Furthermore, based on the two-dimensional FE model, the influence of the sleeve material, the thickness, and the composite structure on the rotor eddy current loss were studied and analyzed. It was found that adding a graphene shielding layer between the permanent magnet and the sleeve can effectively shield the harmonic magnetic field, greatly reduce the eddy current loss of the permanent magnet, and effectively prevent the temperature of the permanent magnet from being too high, which is conducive to the continuous and stable operation of the high-speed permanent magnet motor. Full article
(This article belongs to the Special Issue Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines)
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14 pages, 5852 KiB  
Article
A Novel Design of an Inner Rotor for Optimizing the Air-Gap Magnetic Field of Hollow-Cup Motors
by Jinji Sun, Jianyi Ren and Haoxi Sun
Machines 2022, 10(5), 314; https://doi.org/10.3390/machines10050314 - 27 Apr 2022
Cited by 2 | Viewed by 1645
Abstract
In order to obtain a high power density, spacecraft usually use hollow-cup motors with trapezoidal air-gap magnetic field waveforms. However, due to structural issues, the hollow-cup motor has the problem that the waveform of the air-gap magnetic field is inconsistent with the ideal [...] Read more.
In order to obtain a high power density, spacecraft usually use hollow-cup motors with trapezoidal air-gap magnetic field waveforms. However, due to structural issues, the hollow-cup motor has the problem that the waveform of the air-gap magnetic field is inconsistent with the ideal trapezoidal waveform, which causes torque ripples. In order to reduce torque ripples, the existing method only changes the structure of PMs; the changed PMs are difficult to magnetize and manufacture, which causes the air-gap magnetic field waveform to be unsuitable as the ideal waveform. This paper proposes a novel design of an inner rotor of a hollow-cup motor with an eccentric inner rotor based on the characteristics that the hollow-cup motor has inner and outer rotors and the two rotors rotate synchronously during operation. First, the influencing factors of the air-gap magnetic field are analyzed and the mathematical model of the eccentric inner rotor is established. Then, an eccentric model is established by finite element analysis, which proves that the eccentricity of the inner rotor can make the air-gap magnetic field waveform closer to the ideal trapezoid. Finally, a prototype based on the optimal eccentricity value is developed, verifying the effectiveness of the novel design of the inner rotor. Full article
(This article belongs to the Special Issue Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines)
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Review

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20 pages, 5028 KiB  
Review
A Review of Axial-Flux Permanent-Magnet Motors: Topological Structures, Design, Optimization and Control Techniques
by Zhuo Hao, Yangyang Ma, Pengyu Wang, Geng Luo and Yisong Chen
Machines 2022, 10(12), 1178; https://doi.org/10.3390/machines10121178 - 07 Dec 2022
Cited by 7 | Viewed by 8953
Abstract
Axial-flux permanent-magnet (AFPM) motors are a kind of important motor with compact structure, high power density and high torque density. In this review, the progress of AFPM motors and their key technologies are analyzed and described, with emphasis on the topological structures, design [...] Read more.
Axial-flux permanent-magnet (AFPM) motors are a kind of important motor with compact structure, high power density and high torque density. In this review, the progress of AFPM motors and their key technologies are analyzed and described, with emphasis on the topological structures, design and optimization methods and control techniques. Based on these analyses, the main findings of the review are the following: (1) the yokeless and segment armature (YASA)-type motors have great potential for development; (2) the multi-objective optimization design theories can be integrated and applied to optimize the design of AFPM motors; and (3) optimal control and sensorless control have important value in improving system reliability and reducing cost. Finally, highlights and prospects are provided for further advancing AFPM motors. Full article
(This article belongs to the Special Issue Optimization and Modelling of Synchronous Permanent Magnet, Synchronous Reluctance and Induction Machines)
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