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Machines
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Design, Performance Optimization and Application of Permanent Magnet Motors
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Design, Performance Optimization and Application of Permanent Magnet Motors

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

Deadline for manuscript submissions: 30 September 2025 | Viewed by 1203

Special Issue Editors

Dr. Yiming Shen

E-Mail Website
Guest Editor
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore
Interests: design and optimization of motor topologies; power electronics and control strategies for motor drives; new materials for electrical motors; additive manufacturing technology for electrical motors
Dr. Xuhui Zhu

E-Mail Website
Guest Editor
School of Electrical Engineering and Automation, Nantong University, Nantong, China
Interests: design and optimization of flux modulated and multi-port motors; design of fault tolerant motor driving system; direct-drive motor; linear and arc permanent-magnet motors
Dr. Shengdao Zhu

E-Mail Website
Guest Editor
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore
Interests: development of emerging applications of electrical motors; design and development of axial flux PM motors; vibration and noise analysis of electrical motors

Special Issue Information

Dear Colleagues,

Over the past few decades, driven by advancements in rare-earth permanent magnets (PMs), permanent magnet motors have attracted significant attention and found widespread application in various fields, such as transportation, aerospace, wind power generation, and industrial drives. Advances in motor topologies, materials, cooling, and manufacturing processes have increased the complexity of their design and performance optimization. Therefore, continued research and development in the design, performance optimization, and application of permanent magnet motors is crucial for meeting growing demands for efficient, compact, and reliable motor systems.

This Special Issue aims to provide a platform for researchers to share their latest findings related to the design, performance optimization, and application of permanent magnet motors. The Special Issue covers a wide range of topics, including the following: (1) new topology designs for permanent magnet motors, such as flux-modulated motors, variable-flux motors, multi-port motors, and others; (2) performance optimization for permanent magnet motors, such as multi-objective optimization, multi-physics optimization, surrogate-model-based optimization, and others; and (3) new applications of permanent magnet motors, such as low-speed direct-drive motors, arc motors, PCB motors, rotary-linear motors, and others. Submissions of original research articles related to these topics are welcome.

Dr. Yiming Shen
Dr. Xuhui Zhu
Dr. Shengdao Zhu
Guest Editors

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

  • flux-modulated motors
  • variable-flux motors
  • multi-port motors
  • multi-objective optimization
  • multi-physics optimization
  • surrogate-model-based optimization
  • low-speed direct-drive motors
  • arc motors
  • PCB motors
  • rotary-linear motors

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Published Papers (2 papers)

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Research

16 pages, 5146 KiB  
Article
Comparative Study of Dual-Stator Permanent Magnet Machines with Different PM Arrangements and Rotor Topologies for Aviation Electric Propulsion
by Minchen Zhu, Lijian Wu, Dongliang Liu, Yiming Shen, Rongdeng Li and Hui Wen
Machines 2025, 13(4), 273; https://doi.org/10.3390/machines13040273 - 26 Mar 2025
Viewed by 216
Abstract
The dual-stator permanent magnet (DSPM) machine has proved to have high space utilization and a redundant structure, which can be beneficial to improving the fault tolerance and torque density performance. In this paper, three types of DSPM machines are proposed and compared, where [...] Read more.
The dual-stator permanent magnet (DSPM) machine has proved to have high space utilization and a redundant structure, which can be beneficial to improving the fault tolerance and torque density performance. In this paper, three types of DSPM machines are proposed and compared, where two sets of armature windings are wound in both inner/outer stators, producing more than one torque component compared with single-stator PM machines. The machine topology and operating principle of three DSPM machines are analyzed first. Next, feasible stator/rotor-pole number combinations are compared and determined. Furthermore, based on the finite-element (FE) method, both the electromagnetic performances of three DSPM machines under open-circuit and rated-load conditions after optimization are compared, aimed at generating maximum torque at fixed copper loss. The FE analyses indicate that the dual-stator consequent-pole permanent magnet (DSCPPM) machine generates maximum torque per PM volume, together with relatively high efficiency, which makes it a potentially hopeful candidate for low-speed and high-torque applications. In addition, a thermal analysis is carried out to confirm the validity of the design scheme. Finally, in order to verify the FE predictions, a prototype DSCPPM machine is manufactured and experimentally tested. Full article
(This article belongs to the Special Issue Design, Performance Optimization and Application of Permanent Magnet Motors)
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25 pages, 9780 KiB  
Article
Efficiency Optimization of PMSM-Type Elevator Machine: An Industrial Comparison
by Mucahit Soyaslan, Osman Eldogan, Ahmet Fenercioglu, Yusuf Avsar, Nurdogan Ceylan and Muhammed Salih Sarıkaya
Machines 2025, 13(3), 173; https://doi.org/10.3390/machines13030173 - 21 Feb 2025
Viewed by 476
Abstract
This study presents the design, modeling, and prototyping of an external rotor permanent magnet synchronous motor (ER-PMSM) specifically for elevator traction systems. The external rotor design aims to surpass the efficiency of conventional inner rotor gearless elevator traction motors. A commercially available 4 [...] Read more.
This study presents the design, modeling, and prototyping of an external rotor permanent magnet synchronous motor (ER-PMSM) specifically for elevator traction systems. The external rotor design aims to surpass the efficiency of conventional inner rotor gearless elevator traction motors. A commercially available 4 kW inner rotor permanent magnet synchronous motor (IR-PMSM) was selected for comparative analysis. Critical parameters, including stator tooth tip thickness, slot tip radius, slot height, stator yoke height, stator tooth thickness, and the number of turns per phase, were optimized to enhance efficiency. The artificial bee colony (ABC) algorithm was utilized for the first time to determine the optimal configuration of an external rotor PMSM. The prototype was fabricated and subjected to rigorous testing using a dedicated electrical motor test setup. Comparative results demonstrated a significant improvement in efficiency for the ER-PMSM over the IR-PMSM, with the efficiency increasing from 72.5% to 84.67% at nominal operating conditions. Full article
(This article belongs to the Special Issue Design, Performance Optimization and Application of Permanent Magnet Motors)
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