Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors
Owing to the distinct advantages of stator–permanent magnet (PM) motors over other PM machines, their prominence in high-power-density applications is surging dramatically, capturing growing interest across diverse applications. This article proposes an innovative design procedure for two primary st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/9/2400 |
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| author | Mohammad Reza Sarshar Mohammad Amin Jalali Kondelaji Pedram Asef Mojtaba Mirsalim |
| author_facet | Mohammad Reza Sarshar Mohammad Amin Jalali Kondelaji Pedram Asef Mojtaba Mirsalim |
| author_sort | Mohammad Reza Sarshar |
| collection | DOAJ |
| description | Owing to the distinct advantages of stator–permanent magnet (PM) motors over other PM machines, their prominence in high-power-density applications is surging dramatically, capturing growing interest across diverse applications. This article proposes an innovative design procedure for two primary stator–PM motor types, flux switching and biased flux, yielding 30 novel motor designs. The procedure involves splitting teeth, incorporating a flux reversal effect, and embedding flux barriers into the conventional structure. The analytical reasons behind the novel motors’ architecture are mathematically expressed and verified using finite element analysis (FEA). Through an effective optimisation based on a multi-objective genetic algorithm, various feasible stator/rotor pole combinations are explored, with over 36,000 samples evaluated using FEA coupled with the algorithm. The electromagnetic characteristics of promising motors are analysed, revealing that adding the flux reversal effect and flux barriers, which reduce PM volume while decreasing leakage flux and enhancing air gap flux, improves torque production by up to 68%. Beyond torque enhancement, other electromagnetic parameters, including torque ripple, core loss, and the power factor, are also improved. The proposed motors enhance the PM torque density significantly by about 115% compared to conventional motors and reduce the motor costs. A generalised decision-making process and thermal analysis are applied to the top-performing motors. Additionally, the prototyping measures and considerations are thoroughly discussed. Finally, a comprehensive conclusion is reached. |
| format | Article |
| id | doaj-art-f74219252d404e58b1c411a2b78878b3 |
| institution | OA Journals |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-f74219252d404e58b1c411a2b78878b32025-08-20T02:30:46ZengMDPI AGEnergies1996-10732025-05-01189240010.3390/en18092400Electromagnetic Investigation of Innovative Stator–Permanent Magnet MotorsMohammad Reza Sarshar0Mohammad Amin Jalali Kondelaji1Pedram Asef2Mojtaba Mirsalim3Electrical Machines and Transformers Research Laboratory (EMTRL), Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15916, IranAdvanced Propulsion Laboratory (APL), Mechanical Engineering Department, University College London (UCL), London WC1E 7JE, UKAdvanced Propulsion Laboratory (APL), Mechanical Engineering Department, University College London (UCL), London WC1E 7JE, UKElectrical Machines and Transformers Research Laboratory (EMTRL), Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15916, IranOwing to the distinct advantages of stator–permanent magnet (PM) motors over other PM machines, their prominence in high-power-density applications is surging dramatically, capturing growing interest across diverse applications. This article proposes an innovative design procedure for two primary stator–PM motor types, flux switching and biased flux, yielding 30 novel motor designs. The procedure involves splitting teeth, incorporating a flux reversal effect, and embedding flux barriers into the conventional structure. The analytical reasons behind the novel motors’ architecture are mathematically expressed and verified using finite element analysis (FEA). Through an effective optimisation based on a multi-objective genetic algorithm, various feasible stator/rotor pole combinations are explored, with over 36,000 samples evaluated using FEA coupled with the algorithm. The electromagnetic characteristics of promising motors are analysed, revealing that adding the flux reversal effect and flux barriers, which reduce PM volume while decreasing leakage flux and enhancing air gap flux, improves torque production by up to 68%. Beyond torque enhancement, other electromagnetic parameters, including torque ripple, core loss, and the power factor, are also improved. The proposed motors enhance the PM torque density significantly by about 115% compared to conventional motors and reduce the motor costs. A generalised decision-making process and thermal analysis are applied to the top-performing motors. Additionally, the prototyping measures and considerations are thoroughly discussed. Finally, a comprehensive conclusion is reached.https://www.mdpi.com/1996-1073/18/9/2400flux barriersflux reversalflux-switching machinesmotor optimisationstator–PM |
| spellingShingle | Mohammad Reza Sarshar Mohammad Amin Jalali Kondelaji Pedram Asef Mojtaba Mirsalim Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors Energies flux barriers flux reversal flux-switching machines motor optimisation stator–PM |
| title | Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors |
| title_full | Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors |
| title_fullStr | Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors |
| title_full_unstemmed | Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors |
| title_short | Electromagnetic Investigation of Innovative Stator–Permanent Magnet Motors |
| title_sort | electromagnetic investigation of innovative stator permanent magnet motors |
| topic | flux barriers flux reversal flux-switching machines motor optimisation stator–PM |
| url | https://www.mdpi.com/1996-1073/18/9/2400 |
| work_keys_str_mv | AT mohammadrezasarshar electromagneticinvestigationofinnovativestatorpermanentmagnetmotors AT mohammadaminjalalikondelaji electromagneticinvestigationofinnovativestatorpermanentmagnetmotors AT pedramasef electromagneticinvestigationofinnovativestatorpermanentmagnetmotors AT mojtabamirsalim electromagneticinvestigationofinnovativestatorpermanentmagnetmotors |